@import url('https://fonts.googleapis.com/css2?family=Lora:ital,wght@0,400;0,500;0,600;1,400&family=DM+Sans:wght@300;400;500&display=swap');

/* Visually-hidden but crawlable/screen-reader text (SEO intro) */
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}

:root {
  --bg:       #0F0A1A;
  --bg2:      #160E24;
  --surface:  #1E1430;
  --surface2: #2A1D42;
  --surface3: #3A2858;
  --burg:     #7A1F3D;
  --glow:     #C4547A;
  --plum:     #4A2D6E;
  --plum-lt:  #9B7EC8;
  --sage:     #7EC8A8;
  --gold:     #C8A054;
  --cream:    #F0E6D3;
  --cream2:   #C4B49A;
  --t2:       #8A7A9A;
  --t3:       #4A3D5A;
  --border:   rgba(255,255,255,0.06);
  --border2:  rgba(255,255,255,0.11);
  --fh:       'Lora', Georgia, serif;
  --fb:       'DM Sans', system-ui, sans-serif;
  --r:        10px;
  --rl:       16px;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html,body{height:100%;background:var(--bg);color:var(--cream);font-family:var(--fb);font-size:14px;-webkit-font-smoothing:antialiased;}
::-webkit-scrollbar{width:4px;}
::-webkit-scrollbar-thumb{background:var(--surface3);border-radius:2px;}
button{font-family:var(--fb);cursor:pointer;border:none;background:none;}
input,textarea,select{font-family:var(--fb);}

/* ── SPLASH ── */
#splash-screen{position:fixed;inset:0;background:var(--bg);display:flex;align-items:center;justify-content:center;z-index:999;transition:opacity .5s ease;}
#splash-screen.fade-out{opacity:0;pointer-events:none;}
.splash-inner{display:flex;flex-direction:column;align-items:center;}
.splash-avatar-wrap{position:relative;width:110px;height:110px;margin-bottom:18px;}
.splash-glow{position:absolute;width:110px;height:110px;border-radius:50%;top:0;left:0;background:radial-gradient(circle,rgba(196,84,122,.25) 0%,transparent 70%);animation:glow-pulse 2s ease-in-out infinite;}
.splash-avatar-svg{position:relative;z-index:2;width:100%;filter:drop-shadow(0 0 16px rgba(196,84,122,.6));animation:av-breathe 3s ease-in-out infinite;transform-origin:50% 50%;}
.splash-title{font-family:var(--fh);font-size:26px;font-weight:500;color:var(--cream);letter-spacing:-.01em;margin-bottom:6px;}
.splash-tag{font-size:12px;color:var(--t3);font-style:italic;margin-bottom:28px;}
.splash-dots{display:flex;gap:8px;}
.splash-dot{width:6px;height:6px;border-radius:50%;background:var(--glow);opacity:.3;animation:splash-pulse 1.2s ease-in-out infinite;}
.splash-dot:nth-child(2){animation-delay:.2s;}
.splash-dot:nth-child(3){animation-delay:.4s;}
@keyframes splash-pulse{0%,100%{opacity:.3;transform:scale(.8)}50%{opacity:1;transform:scale(1)}}

/* ── SIGN IN ── */
#signin-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--bg);padding:24px;}
.signin-inner{display:flex;flex-direction:column;align-items:center;width:100%;max-width:360px;}
.signin-avatar-wrap{position:relative;width:110px;height:145px;margin-bottom:20px;flex-shrink:0;}
.signin-glow{position:absolute;width:110px;height:110px;border-radius:50%;top:0;left:0;background:radial-gradient(circle,rgba(196,84,122,.22) 0%,transparent 70%);animation:glow-pulse 4s ease-in-out infinite;}
@keyframes glow-pulse{0%,100%{transform:scale(1);opacity:.6}50%{transform:scale(1.12);opacity:1}}
.signin-avatar-svg{position:relative;z-index:2;width:100%;filter:drop-shadow(0 0 16px rgba(196,84,122,.5));animation:av-breathe 4s ease-in-out infinite;transform-origin:50% 85%;}
@keyframes av-breathe{0%,100%{transform:scaleY(1) translateY(0)}50%{transform:scaleY(1.016) translateY(-3px)}}
.signin-title{font-family:var(--fh);font-size:28px;font-weight:500;color:var(--cream);text-align:center;margin-bottom:6px;}
.signin-tag{font-size:13px;color:var(--t3);text-align:center;margin-bottom:32px;font-style:italic;}
.signin-form{width:100%;display:flex;flex-direction:column;gap:10px;}
.signin-input{width:100%;padding:12px 16px;background:var(--surface);border:1px solid var(--border2);border-radius:var(--r);color:var(--cream);font-size:14px;outline:none;transition:border-color .15s;}
.signin-input:focus{border-color:var(--plum-lt);}
.signin-input::placeholder{color:var(--t3);}
.signin-btn{width:100%;padding:13px;background:linear-gradient(135deg,var(--burg),var(--plum));border:1px solid rgba(196,84,122,.4);border-radius:var(--r);color:var(--cream);font-size:14px;font-weight:500;transition:all .2s;margin-top:4px;}
.signin-btn:hover{filter:brightness(1.15);}
.signin-skip{width:100%;padding:10px;background:transparent;border:none;color:var(--t3);font-size:12px;transition:color .15s;}
.signin-skip:hover{color:var(--t2);}

/* ── APP SHELL ── */
#app{display:flex;height:100vh;overflow:hidden;}

/* ── SIDEBAR ── */
.sidebar{width:224px;min-width:224px;background:var(--bg2);border-right:1px solid var(--border);display:flex;flex-direction:column;overflow:hidden;}
.sidebar-brand{display:flex;align-items:center;gap:10px;padding:18px 16px;border-bottom:1px solid var(--border);flex-shrink:0;}
.brand-mark{width:36px;height:36px;border-radius:9px;background:linear-gradient(135deg,var(--burg),var(--plum));display:flex;align-items:center;justify-content:center;font-family:var(--fh);font-size:11px;color:var(--cream);font-weight:600;box-shadow:0 0 14px rgba(196,84,122,.35);flex-shrink:0;letter-spacing:.03em;}
.brand-name{font-family:var(--fh);font-size:15px;color:var(--cream);}
.brand-tag{font-size:9px;color:var(--t3);letter-spacing:.03em;margin-top:1px;font-style:italic;}
.nav-links{padding:10px 8px;flex:1;overflow-y:auto;}
.nav-link{display:flex;align-items:center;gap:9px;width:100%;padding:9px 12px;border-radius:var(--r);color:var(--t2);font-size:13px;margin-bottom:2px;transition:all .15s;text-align:left;}
.nav-link:hover{background:var(--surface);color:var(--cream);}
.nav-link.active{background:var(--surface2);color:var(--cream);font-weight:500;}
.nav-icon{display:flex;align-items:center;color:var(--t3);flex-shrink:0;}
.nav-link.active .nav-icon{color:var(--glow);}
.sidebar-footer{padding:14px 16px;border-top:1px solid var(--border);flex-shrink:0;}
.sf-label{font-size:10px;color:var(--t3);text-transform:uppercase;letter-spacing:.05em;margin-bottom:4px;}
.sf-topic{font-size:12px;color:var(--glow);font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.sf-user{font-size:11px;color:var(--t3);margin-top:6px;}

/* ── MAIN ── */
.main{flex:1;display:flex;flex-direction:column;overflow:hidden;}
.mobile-bar{display:none;align-items:center;justify-content:space-between;padding:11px 14px;background:var(--bg2);border-bottom:1px solid var(--border);flex-shrink:0;}
.mobile-tabs{display:flex;gap:3px;}
.mobile-tab{padding:6px 10px;border-radius:8px;color:var(--t3);font-size:11px;transition:all .15s;}
.mobile-tab.active{background:var(--surface2);color:var(--cream);}

/* ── PAGES ── */
.page{display:none;flex:1;overflow:hidden;flex-direction:column;}
.page.active{display:flex;}

/* ── HOME ── */
#page-home{overflow:hidden;}
.home-scroll{flex:1;overflow-y:auto;display:flex;justify-content:center;}
.home-inner{width:100%;max-width:600px;padding:28px 20px 90px;display:flex;flex-direction:column;align-items:center;}
.home-avatar-wrap{position:relative;width:120px;height:120px;margin-bottom:14px;flex-shrink:0;}
.home-glow{position:absolute;width:120px;height:120px;border-radius:50%;top:0;left:0;background:radial-gradient(circle,rgba(196,84,122,.22) 0%,transparent 70%);animation:glow-pulse 4s ease-in-out infinite;}
.home-avatar-svg{position:relative;z-index:2;width:100%;filter:drop-shadow(0 0 18px rgba(196,84,122,.5));animation:av-breathe 4s ease-in-out infinite;transform-origin:50% 50%;}
.home-title{font-family:var(--fh);font-size:24px;font-weight:500;color:var(--cream);text-align:center;line-height:1.35;margin-bottom:8px;}
.home-title em{font-style:italic;color:var(--glow);}
.home-sub{font-size:13px;color:var(--t3);text-align:center;line-height:1.7;max-width:320px;margin-bottom:24px;}
.mode-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;width:100%;margin-bottom:22px;}
.mode-card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--rl);padding:16px 14px 13px;cursor:pointer;transition:all .2s;position:relative;overflow:hidden;text-align:left;}
.mode-card:hover{transform:translateY(-2px);border-color:var(--border2);box-shadow:0 8px 24px rgba(0,0,0,.3);}
.mode-card::after{content:'›';position:absolute;right:12px;top:50%;transform:translateY(-50%);font-size:17px;color:var(--border2);transition:all .2s;}
.mode-card:hover::after{color:var(--cream2);transform:translateY(-50%) translateX(2px);}
.mode-card-wide{grid-column:span 2;}
.mode-icon{width:32px;height:32px;border-radius:8px;display:flex;align-items:center;justify-content:center;margin-bottom:9px;}
.mi-teach{background:rgba(196,84,122,.15);}
.mi-notes{background:rgba(155,126,200,.15);}
.mi-q{background:rgba(200,169,110,.15);}
.mi-papers{background:rgba(126,200,168,.15);}
.mi-ask{background:rgba(100,160,220,.15);}
.mode-title{font-size:13px;font-weight:500;color:var(--cream);margin-bottom:4px;}
.mode-desc{font-size:11px;color:var(--t3);line-height:1.55;padding-right:14px;}
.recent-wrap{width:100%;}
.recent-label{font-size:10px;color:var(--t3);text-transform:uppercase;letter-spacing:.08em;margin-bottom:9px;}
.recent-chips{display:flex;gap:8px;flex-wrap:wrap;}
.recent-chip{display:flex;align-items:center;gap:6px;padding:7px 14px;border-radius:999px;border:1px solid var(--border);background:var(--bg2);font-size:12px;color:var(--cream2);cursor:pointer;transition:all .15s;}
.recent-chip:hover{border-color:rgba(196,84,122,.35);color:var(--cream);}
.r-dot{width:6px;height:6px;border-radius:50%;flex-shrink:0;}

/* ── PANEL LAYOUT ── */
.panel-layout{display:flex;flex:1;overflow:hidden;}
.filter-panel{width:182px;min-width:182px;background:var(--bg2);border-right:1px solid var(--border);padding:12px 9px;overflow-y:auto;display:flex;flex-direction:column;gap:1px;}
.fp-label{font-size:10px;color:var(--t3);text-transform:uppercase;letter-spacing:.06em;padding:7px 8px 5px;font-weight:500;}
.fp-label.mt{margin-top:6px;}
.fp-list{display:flex;flex-direction:column;gap:1px;}
.fp-item{padding:7px 10px;border-radius:8px;font-size:12px;color:var(--t2);cursor:pointer;transition:all .12s;line-height:1.4;}
.fp-item:hover{background:var(--surface);color:var(--cream);}
.fp-item.active{background:var(--surface2);color:var(--glow);font-weight:500;}
.fp-select{width:100%;margin-top:4px;padding:7px 10px;border-radius:8px;border:1px solid var(--border2);background:var(--surface);color:var(--cream);font-size:12px;outline:none;}
.fp-add{margin-top:7px;padding:7px 10px;border-radius:8px;border:1px dashed var(--border2);color:var(--t3);font-size:11px;text-align:left;width:100%;transition:all .12s;}
.fp-add:hover{background:var(--surface);color:var(--t2);}
.fp-gen{width:100%;margin-top:14px;padding:10px;border-radius:var(--r);border:1px solid var(--plum);background:var(--surface2);color:var(--plum-lt);font-size:12px;font-weight:500;transition:all .15s;}
.fp-gen:hover{background:var(--plum);color:white;}
.fp-gen:disabled{opacity:.4;cursor:not-allowed;}

/* ── CHAT PANEL ── */
.chat-panel{flex:1;display:flex;flex-direction:column;overflow:hidden;}
.chat-header{padding:13px 18px;border-bottom:1px solid var(--border);background:var(--bg2);flex-shrink:0;display:flex;align-items:center;gap:10px;}
.chat-header-title{font-family:var(--fh);font-size:15px;color:var(--cream);}
.chat-header-sub{font-size:11px;color:var(--t3);margin-top:2px;}
.chat-header-actions{display:flex;gap:6px;flex-shrink:0;}
.tts-toggle{width:32px;height:32px;border-radius:8px;border:1px solid var(--border2);background:var(--surface);color:var(--t2);font-size:14px;display:flex;align-items:center;justify-content:center;transition:all .15s;}
.tts-toggle:hover{border-color:var(--glow);color:var(--glow);}
.tts-toggle.on{border-color:var(--glow);color:var(--glow);background:rgba(196,84,122,.1);}

/* Depth bar */
.depth-bar-wrap{padding:8px 18px;border-bottom:1px solid var(--border);background:var(--bg2);flex-shrink:0;display:flex;align-items:center;gap:10px;}
.depth-bar-label{font-size:10px;color:var(--t3);white-space:nowrap;}
.depth-bar-track{flex:1;height:4px;background:var(--surface3);border-radius:2px;overflow:hidden;}
.depth-bar-fill{height:100%;background:linear-gradient(90deg,var(--burg),var(--glow));border-radius:2px;width:0%;transition:width .6s ease;}
.depth-bar-level{font-size:10px;color:var(--glow);white-space:nowrap;min-width:70px;text-align:right;}

/* Chat messages */
.chat-messages{flex:1;overflow-y:auto;padding:16px 18px;display:flex;flex-direction:column;gap:14px;}
.chat-empty{margin:auto;text-align:center;padding:28px 16px;}

/* Lab avatar in chat */
.lab-av-wrap{position:relative;width:44px;height:44px;flex-shrink:0;}
.lab-av-glow{position:absolute;width:44px;height:44px;border-radius:50%;top:0;left:0;background:radial-gradient(circle,rgba(196,84,122,.18) 0%,transparent 70%);animation:glow-pulse 4s ease-in-out infinite;}
.lab-av-svg{position:relative;z-index:2;width:100%;filter:drop-shadow(0 0 8px rgba(196,84,122,.4));animation:av-breathe 4s ease-in-out infinite;transform-origin:50% 50%;}
.lab-av-svg.listening{animation:av-breathe 3s ease-in-out infinite,av-tilt 2.6s ease-in-out infinite;}
.lab-av-svg.thinking{animation:av-think 1.05s ease-in-out infinite,av-think-glow 1.3s ease-in-out infinite;}
@keyframes av-tilt{0%,100%{transform:rotate(0deg)}30%{transform:rotate(-6deg)}70%{transform:rotate(4deg)}}
@keyframes av-think{0%{transform:translateY(0) rotate(0deg)}20%{transform:translateY(-11px) rotate(-11deg)}55%{transform:translateY(-6px) rotate(9deg)}100%{transform:translateY(0) rotate(0deg)}}
@keyframes av-think-glow{0%,100%{filter:drop-shadow(0 0 6px rgba(155,126,200,.55))}50%{filter:drop-shadow(0 0 18px rgba(155,126,200,1))}}
.lab-av-svg .sw{opacity:0;transition:opacity .2s;}
.lab-av-svg.listening .sw{opacity:1;}
.lab-av-svg.listening .sw-inner{animation:sw-pulse 1.2s ease-in-out infinite;}
.lab-av-svg.listening .sw-outer{animation:sw-pulse 1.2s ease-in-out infinite .15s;}
@keyframes sw-pulse{0%,100%{opacity:.45}50%{opacity:1}}

.chat-empty-title{font-size:14px;color:var(--cream2);margin-bottom:6px;font-weight:500;}
.chat-empty-sub{font-size:12px;color:var(--t3);line-height:1.65;}

.msg{display:flex;gap:8px;align-items:flex-start;}
.msg.user{flex-direction:row-reverse;}
.av-sm{width:28px;height:28px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:500;flex-shrink:0;}
.av-lab-sm{background:var(--surface2);color:var(--glow);border:1px solid rgba(196,84,122,.3);}
.av-user{background:var(--surface);color:var(--sage);border:1px solid rgba(126,200,168,.2);}
.bubble{max-width:76%;padding:10px 14px;font-size:13px;line-height:1.65;border-radius:14px;position:relative;}
.bubble-lab{background:var(--surface);color:var(--cream);border-radius:4px 14px 14px 14px;border:1px solid var(--border);}
.bubble-user{background:var(--surface2);color:var(--cream);border-radius:14px 4px 14px 14px;}
.bubble-user:hover .edit-msg-btn{opacity:1;}
.edit-msg-btn{position:absolute;top:-8px;right:-8px;width:22px;height:22px;border-radius:50%;background:var(--surface3);border:1px solid var(--border2);color:var(--t2);font-size:10px;display:flex;align-items:center;justify-content:center;cursor:pointer;opacity:0;transition:opacity .15s;}
.edit-msg-btn:hover{color:var(--cream);}
.bubble p{margin-bottom:8px;}
.bubble p:last-child{margin-bottom:0;}
.bubble strong{color:var(--cream);font-weight:500;}
.bubble h3{font-family:var(--fh);font-size:14px;color:var(--cream);margin-bottom:6px;margin-top:10px;}
.bubble h3:first-child{margin-top:0;}
.bubble ul,.bubble ol{padding-left:18px;margin-bottom:8px;}
.bubble li{margin-bottom:4px;}

.typing-dots{display:flex;gap:4px;padding:2px 0;align-items:center;}
.dot{width:5px;height:5px;border-radius:50%;background:var(--plum-lt);animation:bounce 1.2s infinite;}
.dot:nth-child(2){animation-delay:.2s;}
.dot:nth-child(3){animation-delay:.4s;}
@keyframes bounce{0%,80%,100%{opacity:.3;transform:scale(.8)}40%{opacity:1;transform:scale(1)}}
.stream-cursor{display:inline-block;width:2px;height:1em;background:var(--glow);margin-left:2px;vertical-align:text-bottom;animation:cur-blink .7s steps(1) infinite;}
@keyframes cur-blink{0%,100%{opacity:1}50%{opacity:0}}

/* ── INPUT AREA ── */
.chat-input-wrap{border-top:1px solid var(--border);background:var(--bg2);flex-shrink:0;padding:12px 16px;}
.chat-input-row{display:flex;gap:8px;align-items:flex-end;}
.chat-textarea{flex:1;resize:none;padding:10px 14px;background:var(--surface);border:1px solid var(--border2);border-radius:12px;color:var(--cream);font-size:13px;line-height:1.5;min-height:42px;max-height:110px;overflow-y:auto;outline:none;transition:border-color .15s;}
.chat-textarea:focus{border-color:var(--plum-lt);}
.chat-textarea:disabled{opacity:.4;cursor:not-allowed;}
.chat-textarea::placeholder{color:var(--t3);}
.tool-btn{width:40px;height:40px;border-radius:10px;border:1px solid var(--border2);background:var(--surface);color:var(--t2);font-size:15px;display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:all .15s;}
.tool-btn:hover{border-color:var(--glow);color:var(--glow);background:rgba(196,84,122,.08);}
.tool-btn.active{border-color:var(--glow);color:var(--glow);background:rgba(196,84,122,.15);animation:pulse-btn 1s infinite;}
@keyframes pulse-btn{0%,100%{box-shadow:0 0 0 0 rgba(196,84,122,.4)}50%{box-shadow:0 0 0 4px rgba(196,84,122,0)}}
.send-btn{padding:10px 18px;border-radius:10px;border:1px solid var(--plum);background:var(--surface2);color:var(--plum-lt);font-size:12px;font-weight:500;transition:all .15s;flex-shrink:0;}
.send-btn:hover{background:var(--plum);color:white;}
.send-btn:disabled{opacity:.4;cursor:not-allowed;}
.file-preview{display:flex;gap:8px;flex-wrap:wrap;margin-top:8px;}
.file-thumb-wrap{position:relative;display:inline-block;}
.file-thumb{width:52px;height:52px;border-radius:8px;object-fit:cover;border:1px solid var(--border2);display:block;}
.file-doc{width:52px;height:52px;border-radius:8px;border:1px solid var(--border2);background:var(--surface);display:flex;align-items:center;justify-content:center;font-size:10px;color:var(--t2);text-align:center;padding:4px;}
.file-remove{position:absolute;top:-6px;right:-6px;width:18px;height:18px;border-radius:50%;background:var(--burg);color:white;font-size:9px;display:flex;align-items:center;justify-content:center;cursor:pointer;}

/* ── CONTENT PANEL ── */
.content-panel{flex:1;overflow-y:auto;padding:22px;}
.content-empty{margin:56px auto;text-align:center;max-width:340px;}
.ce-icon{display:flex;justify-content:center;margin-bottom:14px;}
.ce-title{font-family:var(--fh);font-size:18px;color:var(--cream);margin-bottom:8px;}
.ce-sub{font-size:13px;color:var(--t3);line-height:1.7;}
.content-header{display:flex;align-items:flex-start;justify-content:space-between;margin-bottom:20px;gap:12px;}
.content-title{font-family:var(--fh);font-size:20px;color:var(--cream);}
.content-meta{font-size:12px;color:var(--t3);margin-top:3px;}
.regen-btn{padding:7px 16px;border-radius:8px;border:1px solid var(--border2);color:var(--t3);font-size:12px;transition:all .15s;flex-shrink:0;}
.regen-btn:hover{border-color:var(--plum-lt);color:var(--plum-lt);}

/* Notes */
.notes-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--rl);padding:18px 20px;margin-bottom:12px;}
.notes-tag{display:inline-block;font-size:10px;padding:3px 10px;border-radius:999px;margin-bottom:10px;text-transform:uppercase;letter-spacing:.05em;font-weight:500;}
.tag-ov{background:rgba(155,126,200,.15);color:var(--plum-lt);}
.tag-kv{background:rgba(196,84,122,.12);color:var(--glow);}
.tag-tp{background:rgba(200,169,110,.15);color:var(--gold);}
.tag-eq{background:rgba(126,200,168,.12);color:var(--sage);}
.notes-card p{font-size:13px;color:var(--cream2);line-height:1.8;margin-bottom:8px;}
.notes-card p:last-child{margin-bottom:0;}
.notes-card p strong{color:var(--cream);}
.notes-card ul{font-size:13px;color:var(--cream2);padding-left:18px;line-height:1.8;}
.notes-card li{margin-bottom:4px;}

/* Questions */
.q-nav{display:flex;align-items:center;gap:10px;margin-bottom:18px;flex-wrap:wrap;}
.q-nav-btn{padding:6px 14px;border-radius:8px;border:1px solid var(--border2);color:var(--t2);font-size:12px;transition:all .15s;}
.q-nav-btn:hover{background:var(--surface);color:var(--cream);}
.q-nav-btn:disabled{opacity:.3;cursor:not-allowed;}
.q-counter{font-size:12px;color:var(--t3);flex:1;text-align:center;}
.q-tier-tabs{display:flex;gap:4px;margin-bottom:16px;}
.q-tier-tab{flex:1;padding:7px;border-radius:8px;font-size:11px;font-weight:500;border:1px solid var(--border);color:var(--t3);text-align:center;cursor:pointer;transition:all .15s;}
.q-tier-tab.easy.active{background:rgba(126,200,168,.12);border-color:var(--sage);color:var(--sage);}
.q-tier-tab.medium.active{background:rgba(200,169,110,.12);border-color:var(--gold);color:var(--gold);}
.q-tier-tab.hard.active{background:rgba(196,84,122,.12);border-color:var(--glow);color:var(--glow);}
.q-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--rl);padding:18px 20px;}
.q-tags{display:flex;gap:7px;flex-wrap:wrap;margin-bottom:12px;}
.q-tag{font-size:10px;padding:3px 9px;border-radius:999px;background:var(--bg2);color:var(--t3);text-transform:uppercase;letter-spacing:.04em;}
.q-tag.easy{background:rgba(126,200,168,.12);color:var(--sage);}
.q-tag.medium{background:rgba(200,169,110,.12);color:var(--gold);}
.q-tag.hard{background:rgba(196,84,122,.12);color:var(--glow);}
.q-text{font-size:14px;color:var(--cream);line-height:1.7;margin-bottom:8px;}
.q-marks{font-size:12px;color:var(--gold);font-weight:500;margin-bottom:14px;}
.q-options{display:flex;flex-direction:column;gap:7px;margin-bottom:14px;}
.q-opt{padding:9px 14px;border-radius:9px;border:1px solid var(--border);font-size:13px;color:var(--cream2);cursor:pointer;transition:all .12s;text-align:left;}
.q-opt:hover{border-color:var(--plum-lt);color:var(--cream);background:var(--surface2);}
.q-opt.correct{border-color:var(--sage);color:var(--sage);background:rgba(126,200,168,.08);}
.q-opt.wrong{border-color:var(--glow);color:var(--glow);background:rgba(196,84,122,.08);}
.reveal-btn{padding:7px 16px;border-radius:8px;border:1px solid var(--border2);color:var(--t3);font-size:12px;transition:all .15s;}
.reveal-btn:hover{border-color:var(--sage);color:var(--sage);}
.answer-box{display:none;margin-top:12px;padding:14px;border-radius:10px;border:1px solid rgba(126,200,168,.25);background:rgba(126,200,168,.06);font-size:13px;color:var(--sage);line-height:1.7;}
.answer-box.open{display:block;}
.q-tally{font-size:10px;font-weight:600;opacity:.85;margin-left:5px;}
.q-selfrate{margin-top:14px;padding-top:12px;border-top:1px solid rgba(126,200,168,.18);}
.q-selfrate-label{font-size:11px;color:var(--t3);margin-bottom:8px;}
.q-selfrate-btns{display:flex;gap:7px;}
.q-sr-btn{flex:1;padding:8px;border-radius:8px;font-size:12px;font-weight:500;border:1px solid var(--border);background:none;color:var(--t3);cursor:pointer;transition:all .15s;}
.q-sr-btn.nailed:hover,.q-sr-btn.nailed.selected{border-color:var(--sage);color:var(--sage);background:rgba(126,200,168,.12);}
.q-sr-btn.partly:hover,.q-sr-btn.partly.selected{border-color:var(--gold);color:var(--gold);background:rgba(200,169,110,.12);}
.q-sr-btn.missed:hover,.q-sr-btn.missed.selected{border-color:var(--glow);color:var(--glow);background:rgba(196,84,122,.12);}
.generating-state{text-align:center;padding:48px 24px;color:var(--t3);font-size:13px;}
.gen-dots{display:flex;gap:6px;justify-content:center;margin-top:16px;}

/* Papers */
.papers-board-title{font-family:var(--fh);font-size:18px;color:var(--cream);margin-bottom:18px;}
.papers-section{margin-bottom:22px;}
.papers-section-title{font-size:13px;color:var(--cream2);font-weight:500;padding-bottom:8px;border-bottom:1px solid var(--border);margin-bottom:10px;}
.paper-row{display:flex;align-items:center;justify-content:space-between;padding:10px 0;border-bottom:1px solid var(--border);gap:12px;}
.paper-row:last-child{border-bottom:none;}
.paper-title{font-size:13px;color:var(--cream);font-weight:500;}
.paper-meta{font-size:11px;color:var(--t3);margin-top:2px;}
.paper-links{display:flex;gap:6px;flex-shrink:0;}
.paper-link{font-size:11px;padding:5px 12px;border-radius:7px;border:1px solid var(--border2);color:var(--cream2);text-decoration:none;transition:all .12s;}
.paper-link:hover{background:var(--surface);color:var(--cream);}
.paper-link.ms{border-color:rgba(126,200,168,.3);color:var(--sage);}
.paper-link.ms:hover{background:rgba(126,200,168,.08);}
.papers-note{font-size:11px;color:var(--t3);padding:14px 0 4px;}

/* Ask page */
#page-ask{overflow:hidden;}
.ask-header{display:flex;align-items:center;gap:14px;padding:14px 18px;border-bottom:1px solid var(--border);background:var(--bg2);flex-shrink:0;}
.ask-avatar-wrap{width:44px;height:44px;flex-shrink:0;}
.streak-badge{display:inline-block;padding:5px 14px;border-radius:999px;background:rgba(200,160,84,.12);border:1px solid rgba(200,160,84,.3);color:var(--gold);font-size:12px;margin-bottom:12px;}
.stats-row{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:12px;}
.stat-chip{padding:5px 13px;border-radius:999px;background:rgba(200,160,84,.12);border:1px solid rgba(200,160,84,.3);color:var(--gold);font-size:12px;font-weight:600;}
.stat-badge{font-size:16px;line-height:1;cursor:default;}
.ask-avatar{width:44px;height:44px;filter:drop-shadow(0 0 10px rgba(196,84,122,.4));animation:av-breathe 4s ease-in-out infinite;transform-origin:50% 50%;flex-shrink:0;}
.ask-header-title{font-family:var(--fh);font-size:15px;color:var(--cream);}
.ask-header-sub{font-size:11px;color:var(--t3);margin-top:2px;}

/* Bottom nav - MOBILE ONLY */
.bottom-nav{display:none !important;}

@media(max-width:720px){
.bottom-nav{display:flex !important;position:fixed;bottom:0;left:0;right:0;background:var(--bg);border-top:1px solid var(--border);backdrop-filter:blur(12px);padding:6px 0 10px;z-index:50;}
}
.bn-tab{flex:1;display:flex;flex-direction:column;align-items:center;gap:3px;padding:5px 4px;}
.bn-icon{font-size:17px;line-height:1;color:var(--t2);}
.bn-tab.active .bn-icon{color:var(--glow);}
.bn-label{font-size:10px;color:var(--t3);}
.bn-tab.active .bn-label{color:var(--glow);}
.bn-dot{width:4px;height:4px;border-radius:50%;background:var(--glow);opacity:0;margin-top:1px;}
.bn-tab.active .bn-dot{opacity:1;}

/* Modal */
.modal-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.65);z-index:100;align-items:center;justify-content:center;}
.modal-overlay.open{display:flex;}
.modal{background:var(--surface);border:1px solid var(--border2);border-radius:var(--rl);padding:24px;width:320px;max-width:90vw;}
.modal-title{font-family:var(--fh);font-size:16px;color:var(--cream);margin-bottom:16px;}
.modal-input,.modal-select{width:100%;padding:9px 13px;margin-bottom:10px;background:var(--bg2);border:1px solid var(--border2);border-radius:8px;color:var(--cream);font-size:13px;outline:none;}
.modal-input:focus{border-color:var(--plum-lt);}
.modal-btns{display:flex;gap:8px;margin-top:6px;}
.modal-cancel{padding:9px 16px;border-radius:8px;border:1px solid var(--border2);color:var(--t2);font-size:13px;}
.modal-confirm{flex:1;padding:9px;border-radius:8px;background:var(--plum);color:white;font-size:13px;font-weight:500;}
.modal-confirm:hover{background:var(--plum-lt);color:var(--bg);}

/* Responsive */
@media(max-width:720px){
  .sidebar{display:none;}
  .mobile-bar{display:flex;}
  .mobile-tabs{display:none;} /* bottom-nav handles navigation on mobile */
  .main{padding-bottom:68px;}
  .filter-panel{width:144px;min-width:144px;padding:10px 7px;}
  .content-panel{padding:14px;}
  .chat-messages{padding:12px;}
  .chat-input-wrap{padding:10px 12px;}
  .home-inner{padding:20px 14px 90px;}
}

/* ── LIGHT MODE ── */
body.light-mode {
  --bg:       #F5F0FA;
  --bg2:      #EDE5F5;
  --surface:  #E4D9F0;
  --surface2: #D5C5E8;
  --surface3: #C4B0DC;
  --burg:     #7A1F3D;
  --glow:     #9B2E50;
  --plum:     #6A3D8E;
  --plum-lt:  #7A4DA0;
  --sage:     #2E7A5E;
  --gold:     #8A6020;
  --cream:    #1A0A2E;
  --cream2:   #3A2050;
  --t2:       #5A3A7A;
  --t3:       #8A6AAA;
  --border:   rgba(0,0,0,0.08);
  --border2:  rgba(0,0,0,0.14);
}
body.light-mode .bubble-lab { background: #EDE5F5; border-color: rgba(0,0,0,0.08); }
body.light-mode .bubble-user { background: #D5C5E8; }
body.light-mode .notes-card { background: #EDE5F5; }
body.light-mode .q-card { background: #EDE5F5; }
body.light-mode .modal { background: #EDE5F5; }
body.light-mode .signin-inner { background: transparent; }
body.light-mode #splash-screen { background: #F5F0FA; }

/* ── SETTINGS ── */
.settings-scroll { flex:1; overflow-y:auto; display:flex; justify-content:center; }
.settings-inner { width:100%; max-width:560px; padding:28px 20px 60px; }
.settings-section { margin-bottom:28px; background:var(--surface); border:1px solid var(--border); border-radius:var(--rl); padding:20px; }
.settings-title { font-family:var(--fh); font-size:16px; color:var(--cream); margin-bottom:14px; }
.settings-row { display:flex; align-items:center; justify-content:space-between; margin-bottom:12px; }
.settings-label { font-size:13px; color:var(--cream2); }
.settings-value { font-size:13px; color:var(--t2); }
.settings-btn { width:100%; padding:10px; border-radius:var(--r); border:none; background:var(--plum); color:white; font-size:13px; font-weight:500; font-family:var(--fb); margin-top:8px; cursor:pointer; transition:all .15s; }
.settings-btn:hover { background:var(--plum-lt); }
.settings-btn.ghost { background:transparent; border:1px solid var(--border2); color:var(--t2); }
.settings-btn.danger { background:rgba(196,84,122,.15); border:1px solid var(--glow); color:var(--glow); }
.settings-btn.danger:hover { background:var(--glow); color:white; }
.settings-opt { padding:8px 14px; border-radius:8px; border:1px solid var(--border2); background:transparent; color:var(--t2); font-size:12px; font-family:var(--fb); cursor:pointer; transition:all .15s; }
.settings-opt:hover { background:var(--surface2); color:var(--cream); }
.settings-opt.active { background:var(--surface2); border-color:var(--plum-lt); color:var(--plum-lt); }

/* ── THINKING GLOW ── */
.lab-av-glow.thinking-glow { background: radial-gradient(circle,rgba(155,126,200,.6) 0%,transparent 70%); animation: think-glow-pulse 1.3s ease-in-out infinite; }
@keyframes think-glow-pulse{0%,100%{transform:scale(1);opacity:.5}50%{transform:scale(1.45);opacity:1}}

/* ── MULTI-SUBJECT DASHBOARD ── */
.dash-summary{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin:6px 0 18px;}
.dash-sum-item{background:var(--surface2);border:1px solid var(--border2);border-radius:12px;padding:14px 10px;text-align:center;}
.dash-sum-num{font-size:23px;font-weight:700;color:var(--cream);line-height:1.1;}
.dash-sum-name{font-size:14px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.dash-sum-lbl{font-size:10.5px;color:var(--t3);margin-top:5px;}
.dash-subjects{display:flex;flex-direction:column;gap:10px;}
.dash-subject{background:var(--surface2);border:1px solid var(--border2);border-radius:12px;overflow:hidden;}
.dash-subject-head{display:flex;align-items:center;gap:11px;padding:13px 14px;cursor:pointer;}
.dash-subject-head:hover{background:rgba(255,255,255,.02);}
.dash-subj-name{flex:0 0 120px;font-size:13px;color:var(--cream);font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.dash-bar{flex:1;height:7px;background:var(--border);border-radius:4px;overflow:hidden;}
.dash-bar-fill{height:100%;border-radius:4px;transition:width .5s ease;}
.dash-subj-pct{font-size:13px;font-weight:700;width:38px;text-align:right;}
.dash-subj-meta{font-size:11px;color:var(--t3);width:40px;text-align:right;}
.dash-caret{font-size:10px;color:var(--t3);width:14px;text-align:center;}
.dash-topics{padding:2px 14px 12px;}
.dash-topic{padding:11px 0;border-top:1px solid var(--border);}
.dash-topic-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:9px;}
.dash-topic-name{font-size:12px;color:var(--cream2);font-weight:500;}
.dash-topic-pct{font-size:12px;font-weight:700;}
.dash-concepts{display:flex;flex-wrap:wrap;gap:6px;}
.dash-concept{display:inline-flex;align-items:center;gap:7px;padding:6px 10px;border-radius:9px;background:var(--surface);border:1px solid var(--border2);cursor:pointer;font-size:12px;color:var(--cream2);transition:border-color .15s;}
.dash-concept:hover{border-color:var(--glow);}
.dash-concept-score{font-size:10px;font-weight:700;padding:2px 7px;border-radius:10px;min-width:16px;text-align:center;}
.dash-home-card{background:var(--surface2);border:1px solid var(--border2);border-radius:14px;padding:14px 16px;cursor:pointer;transition:border-color .2s;width:100%;box-sizing:border-box;}
.dash-home-card:hover{border-color:var(--glow);}
.dash-home-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:11px;}
.dash-home-title{font-size:13px;font-weight:600;color:var(--cream);}
.dash-home-arrow{color:var(--glow);font-size:16px;}
.dash-home-stats{display:flex;gap:22px;}
.dash-home-num{font-size:20px;font-weight:700;color:var(--cream);line-height:1.1;}
.dash-home-lbl{font-size:10px;color:var(--t3);margin-top:3px;}
/* Predict My Grade — Home card */
.predict-home-card{display:flex;align-items:center;gap:14px;background:var(--surface2);border:1px solid var(--border2);border-radius:14px;padding:12px 16px;cursor:pointer;transition:border-color .2s;width:100%;box-sizing:border-box;}
.predict-home-card:hover{border-color:var(--glow);}
.ph-grade{flex:none;width:46px;height:46px;display:flex;align-items:center;justify-content:center;border:2px solid;border-radius:12px;font-size:20px;font-weight:700;}
.ph-body{flex:1;min-width:0;}
.ph-title{font-size:13px;font-weight:600;color:var(--cream);}
.ph-meta{font-size:11px;color:var(--t3);margin-top:3px;}
.ph-arrow{color:var(--glow);font-size:16px;flex:none;}
/* Predict My Grade — Dashboard block */
.pred-section{margin:4px 0 20px;}
.pred-head{font-size:13px;font-weight:600;color:var(--cream);margin-bottom:12px;}
.pred-sub{font-size:11px;font-weight:400;color:var(--t3);margin-left:8px;}
.pred-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;}
.pred-card{display:flex;align-items:center;gap:13px;background:var(--surface);border:1px solid var(--border);border-radius:13px;padding:12px 14px;}
.pred-grade{flex:none;width:44px;height:44px;display:flex;align-items:center;justify-content:center;border:2px solid;border-radius:11px;font-size:18px;font-weight:700;}
.pred-info{flex:1;min-width:0;}
.pred-subj{font-size:13px;font-weight:600;color:var(--cream);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.pred-board{font-size:10px;font-weight:400;color:var(--t3);margin-left:6px;}
.pred-bar{height:5px;border-radius:3px;background:var(--surface2);margin:6px 0 5px;overflow:hidden;}
.pred-bar-fill{height:100%;border-radius:3px;transition:width .6s ease;}
.pred-meta{font-size:10px;color:var(--t3);}
.pred-foot{font-size:10px;color:var(--t3);margin-top:11px;line-height:1.5;}
@media(max-width:600px){.dash-summary{grid-template-columns:repeat(2,1fr);}.dash-subj-name{flex-basis:84px;}.pred-grid{grid-template-columns:1fr;}}
.lang-note{font-size:11.5px;line-height:1.5;color:var(--gold);background:rgba(200,169,110,.1);border:1px solid rgba(200,169,110,.28);border-radius:9px;padding:9px 12px;}
.lang-note strong{color:var(--cream);}
/* Teaching-style analysis (Pro #2) — Dashboard section */
.style-section{margin:4px 0 20px;background:var(--surface);border:1px solid var(--border);border-radius:13px;padding:14px 16px;}
.style-head{font-size:13px;font-weight:600;color:var(--cream);margin-bottom:10px;display:flex;align-items:center;justify-content:space-between;}
.style-regen{width:26px;height:26px;border-radius:50%;border:1px solid var(--border2);background:transparent;color:var(--t2);font-size:13px;cursor:pointer;}
.style-regen:hover{border-color:var(--glow);color:var(--glow);}
.style-cta{font-size:12.5px;color:var(--t2);line-height:1.6;}
.style-cta strong{color:var(--cream);}
.style-body{font-size:13px;color:var(--t1);line-height:1.6;}
.style-body h3{font-size:12.5px;color:var(--glow);margin:12px 0 5px;}
.style-body strong{color:var(--cream);}
.style-body ul{margin:5px 0 8px;padding-left:18px;}
.style-body li{margin:3px 0;}
.style-body p{margin:5px 0;}
/* Weakness Map — Home card */
.weak-home-card{display:flex;align-items:center;gap:14px;background:var(--surface2);border:1px solid var(--border2);border-radius:14px;padding:12px 16px;cursor:pointer;transition:border-color .2s;width:100%;box-sizing:border-box;}
.weak-home-card:hover{border-color:var(--glow);}
.wh-icon{flex:none;font-size:24px;width:30px;text-align:center;}
.wh-body{flex:1;min-width:0;}
.wh-title{font-size:13px;font-weight:600;color:var(--cream);}
.wh-meta{font-size:11px;color:var(--t3);margin-top:3px;}
.wh-arrow{color:var(--glow);font-size:16px;flex:none;}
/* Weakness Map — page */
.wm-pickers{display:flex;flex-wrap:wrap;gap:7px;margin:2px 0 16px;}
.wm-pick{font-size:12px;padding:6px 13px;border-radius:999px;border:1px solid var(--border2);background:var(--surface);color:var(--t2);cursor:pointer;transition:.15s;}
.wm-pick:hover{border-color:var(--glow);color:var(--cream);}
.wm-pick.active{background:var(--glow);border-color:var(--glow);color:#fff;font-weight:600;}
.wm-legend{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:12px;}
.wm-leg{display:flex;align-items:center;gap:6px;font-size:11px;color:var(--t3);}
.wm-leg i{width:11px;height:11px;border-radius:3px;display:inline-block;}
.wm-summary{font-size:12px;color:var(--t2);background:var(--surface);border:1px solid var(--border);border-radius:11px;padding:10px 14px;margin-bottom:18px;}
.wm-summary strong{color:var(--cream);}
.wm-reteach{margin-bottom:22px;}
.wm-reteach-head{font-size:13px;font-weight:600;color:var(--cream);margin-bottom:11px;}
.wm-reteach-sub{font-size:11px;font-weight:400;color:var(--t3);margin-left:8px;}
.wm-step{display:flex;align-items:center;gap:12px;width:100%;text-align:left;background:var(--surface);border:1px solid var(--border);border-radius:11px;padding:10px 13px;margin-bottom:8px;cursor:pointer;transition:border-color .15s;}
.wm-step:hover{border-color:var(--glow);}
.wm-step-num{flex:none;width:24px;height:24px;border-radius:50%;background:var(--surface2);color:var(--t2);font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center;}
.wm-step-body{flex:1;min-width:0;display:flex;flex-direction:column;}
.wm-step-name{font-size:13px;font-weight:600;color:var(--cream);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.wm-step-topic{font-size:10px;color:var(--t3);}
.wm-step-band{flex:none;font-size:10px;font-weight:600;padding:3px 9px;border-radius:999px;}
.wm-allstrong{font-size:13px;color:var(--sage);background:rgba(126,200,168,.12);border:1px solid rgba(126,200,168,.3);border-radius:11px;padding:14px 16px;margin-bottom:22px;}
.wm-grid{display:flex;flex-direction:column;gap:16px;}
.wm-topic-name{font-size:12px;font-weight:600;color:var(--t2);margin-bottom:8px;}
.wm-cells{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:8px;}
.wm-cell{display:flex;flex-direction:column;gap:4px;align-items:flex-start;text-align:left;border:1px solid;border-radius:10px;padding:9px 11px;cursor:pointer;transition:transform .12s;}
.wm-cell:hover{transform:translateY(-1px);}
.wm-cell-name{font-size:12px;font-weight:500;color:var(--cream);line-height:1.25;}
.wm-cell-score{font-size:11px;font-weight:700;}
@media(max-width:600px){.wm-cells{grid-template-columns:repeat(auto-fill,minmax(120px,1fr));}}

/* ── RECENT CHIP WRAP ── */
.recent-chip-wrap { margin-bottom:6px; }

/* Fix edit button - always visible on mobile, hover on desktop */
.edit-msg-btn { opacity: 0; }
@media(hover: hover) {
  .bubble-user:hover .edit-msg-btn { opacity: 1; }
}
@media(hover: none) {
  .edit-msg-btn { opacity: 1; }
}

/* Fix edit button hover */
.msg-user-wrap { position:relative; display:inline-block; max-width:76%; }
.msg-user-wrap .edit-msg-btn { 
  position:absolute; top:-8px; right:-8px;
  width:22px; height:22px; border-radius:50%;
  background:var(--surface3); border:1px solid var(--border2);
  color:var(--t2); font-size:10px;
  display:flex; align-items:center; justify-content:center;
  cursor:pointer; opacity:0; transition:opacity .15s;
  z-index:5;
}
.msg-user-wrap:hover .edit-msg-btn { opacity:1; }
@media(hover:none){ .msg-user-wrap .edit-msg-btn { opacity:1; } }
.msg-user-wrap .bubble-user { max-width:100%; }

/* ── POLISH: motion, feedback, toasts ── */
html{scroll-behavior:smooth;}

/* Gentle entrance for chat messages */
@keyframes msg-in{from{opacity:0;transform:translateY(8px);}to{opacity:1;transform:translateY(0);}}
.msg{animation:msg-in .26s ease both;}

/* Soft cross-fade when switching pages */
@keyframes page-in{from{opacity:0;transform:translateY(4px);}to{opacity:1;transform:translateY(0);}}
.page.active{animation:page-in .28s ease;}

/* Mark scheme reveal */
.answer-box.open{animation:msg-in .24s ease;}

/* Tactile press feedback */
.send-btn:active,.tool-btn:active,.fp-gen:active,.settings-btn:active,.settings-opt:active,
.signin-btn:active,.signin-skip:active,.q-nav-btn:active,.q-tier-tab:active,.reveal-btn:active,
.regen-btn:active,.modal-confirm:active,.modal-cancel:active,.nav-link:active,.fp-item:active,
.mode-card:active,.tts-toggle:active,.recent-chip:active{transform:scale(.97);}
.mode-card:active{transform:translateY(0) scale(.99);}

/* Clearer keyboard focus for accessibility */
button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible,
.fp-item:focus-visible,.mode-card:focus-visible{outline:2px solid var(--plum-lt);outline-offset:2px;}

/* Toast */
.aw-toast{position:fixed;left:50%;bottom:30px;transform:translateX(-50%) translateY(16px);
  background:var(--surface2);color:var(--cream);border:1px solid var(--border2);border-radius:12px;
  padding:12px 20px;font-size:13px;line-height:1.4;box-shadow:0 12px 40px rgba(0,0,0,.45);
  opacity:0;pointer-events:none;z-index:1000;max-width:88vw;text-align:center;
  transition:opacity .25s ease,transform .25s ease;}
.aw-toast.show{opacity:1;transform:translateX(-50%) translateY(0);}
.aw-toast.success{border-color:var(--sage);}
.aw-toast.error{border-color:var(--glow);}
@media(max-width:720px){.aw-toast{bottom:84px;}}

@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  .msg,.page.active,.answer-box.open{animation:none;}
}

/* ── LOADING DOTS ── */
.loading-dots{display:flex;gap:6px;justify-content:center;margin-top:16px;}

/* ── CONFIRM POPUP ── */
.confirm-popup{background:var(--surface2);border:1px solid var(--border2);border-radius:var(--rl);padding:14px 16px;box-shadow:0 12px 40px rgba(0,0,0,.5);min-width:200px;max-width:280px;}
.confirm-msg{font-size:13px;color:var(--cream);margin-bottom:12px;line-height:1.5;}
.confirm-btns{display:flex;gap:8px;}
.confirm-no{flex:1;padding:8px;border-radius:8px;border:1px solid var(--border2);color:var(--t2);font-size:12px;font-family:var(--fb);cursor:pointer;background:transparent;}
.confirm-yes{flex:1;padding:8px;border-radius:8px;background:var(--glow);color:white;font-size:12px;font-weight:500;font-family:var(--fb);cursor:pointer;border:none;}
.confirm-yes:hover{filter:brightness(1.1);}

/* ── MSG ACTIONS ── */
.msg-actions{display:flex;gap:4px;margin-bottom:4px;justify-content:flex-end;opacity:0;transition:opacity .15s;}
.msg-user-wrap:hover .msg-actions{opacity:1;}
@media(hover:none){.msg-actions{opacity:1;}}
.msg-action-btn{width:22px;height:22px;border-radius:6px;background:var(--surface3);border:1px solid var(--border2);color:var(--t2);font-size:10px;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .12s;}
.msg-action-btn:hover{color:var(--cream);background:var(--surface2);}
.msg-action-btn.delete:hover{color:var(--glow);border-color:var(--glow);}

/* ── MASTERY BADGE ── */
.mastery-badge{font-size:9px;padding:1px 6px;border-radius:999px;font-weight:500;flex-shrink:0;margin-left:4px;}
.practice-badge{font-size:11px;line-height:1;color:var(--sage);font-weight:700;flex-shrink:0;}
.qprog-badge{font-size:9px;padding:1px 6px;border-radius:999px;font-weight:600;flex-shrink:0;margin-left:4px;background:rgba(200,169,110,.18);color:var(--gold);}
.qprog-badge.done{background:rgba(126,200,168,.2);color:var(--sage);}

/* ── FEYNMAN REPORT ── */
.feynman-report-prompt{padding:12px 18px;text-align:center;}
.feynman-report-btn{width:auto;padding:10px 24px;margin:0 auto;display:inline-block;background:linear-gradient(135deg,var(--burg),var(--plum));border-color:transparent;color:white;}
.feynman-report-btn:hover{filter:brightness(1.12);}
.bubble-report{border:1px solid rgba(196,84,122,.3);background:rgba(196,84,122,.06) !important;}
/* Confuse Me Mode (Pro #7) */
.confuse-banner{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:12px;color:var(--plum-lt);background:rgba(155,126,200,.12);border:1px solid rgba(155,126,200,.3);border-radius:10px;padding:9px 13px;margin-bottom:12px;line-height:1.45;}
.confuse-banner strong{color:var(--cream);}
.confuse-exit{margin-left:auto;font-size:11px;padding:4px 11px;border-radius:999px;border:1px solid rgba(155,126,200,.4);background:transparent;color:var(--plum-lt);cursor:pointer;}
.confuse-exit:hover{border-color:var(--glow);color:var(--glow);}
#confuseBtn.on{background:rgba(155,126,200,.28);}
/* Feynman Report — Free teaser + Pro lock */
.fr-locked{position:relative;}
.fr-locked .fr-teaser{max-height:3.4em;overflow:hidden;-webkit-mask-image:linear-gradient(to bottom,#000 45%,transparent 100%);mask-image:linear-gradient(to bottom,#000 45%,transparent 100%);}
.fr-lock{display:flex;flex-direction:column;align-items:center;gap:9px;text-align:center;padding:6px 4px 2px;}
.fr-lock-msg{font-size:12px;color:var(--t2);line-height:1.45;max-width:300px;}
.fr-lock-btn{padding:8px 22px;border:none;border-radius:999px;background:linear-gradient(135deg,var(--burg),var(--plum));color:#fff;font-size:12px;font-weight:600;cursor:pointer;transition:filter .15s;}
.fr-lock-btn:hover{filter:brightness(1.12);}
/* Formula Sheet (Pro #12) */
.formula-sheet{font-size:13.5px;line-height:1.6;color:var(--t1);}
.formula-sheet h3{font-size:14px;color:var(--glow);margin:20px 0 8px;padding-bottom:5px;border-bottom:1px solid var(--border2);}
.formula-sheet h3:first-child{margin-top:4px;}
.formula-sheet code{background:var(--surface2);color:var(--gold);padding:1px 6px;border-radius:5px;font-family:'Courier New',monospace;font-size:13px;}
.formula-sheet strong{color:var(--cream);}
.formula-sheet em{color:var(--t3);font-size:12px;}
.formula-sheet ul{margin:5px 0 10px;padding-left:18px;}
.formula-sheet li{margin:2px 0;}
.formula-sheet p{margin:6px 0;}
/* Exam Planner (Pro #10) */
.plan-home-card{background:var(--surface2);border:1px solid var(--border2);border-radius:14px;padding:13px 16px;cursor:pointer;transition:border-color .2s;width:100%;box-sizing:border-box;}
.plan-home-card:hover{border-color:var(--glow);}
.plan-home-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:9px;}
.plan-home-title{font-size:13px;font-weight:600;color:var(--cream);}
.plan-home-days{font-size:11px;color:var(--t3);}
.plan-home-days.urgent{color:var(--glow);font-weight:600;}
.plan-hi{font-size:12px;color:var(--t2);padding:3px 0;}
.plan-hi-sub{font-size:10px;color:var(--plum-lt);font-weight:600;margin-right:4px;}
.plan-hi-act{font-size:10px;color:var(--gold);margin-left:5px;}
.plan-hi-more{font-size:10px;color:var(--t3);padding-top:3px;}
.plan-home-rest{font-size:12px;color:var(--t3);}
.plan-exams{display:flex;flex-wrap:wrap;gap:7px;margin:2px 0 14px;}
.plan-exam-chip{font-size:11px;padding:5px 11px;border-radius:999px;background:var(--surface);border:1px solid var(--border2);color:var(--t2);cursor:pointer;transition:.15s;}
.plan-exam-chip:hover{border-color:var(--glow);color:var(--cream);}
.plan-exam-chip.urgent{border-color:var(--glow);color:var(--glow);font-weight:600;}
.plan-pace{display:flex;gap:7px;margin-bottom:14px;flex-wrap:wrap;}
.plan-pace-btn{font-size:11px;padding:6px 13px;border-radius:999px;border:1px solid var(--border2);background:var(--surface);color:var(--t2);cursor:pointer;transition:.15s;}
.plan-pace-btn:hover{border-color:var(--glow);color:var(--cream);}
.plan-pace-btn.active{background:var(--glow);border-color:var(--glow);color:#fff;font-weight:600;}
.plan-warn{font-size:12px;color:var(--gold);background:rgba(200,169,110,.1);border:1px solid rgba(200,169,110,.3);border-radius:10px;padding:10px 14px;margin-bottom:16px;line-height:1.45;}
.plan-days{display:flex;flex-direction:column;gap:12px;}
.plan-day{border:1px solid var(--border);border-radius:12px;padding:11px 14px;background:var(--surface);}
.plan-day.today{border-color:var(--glow);background:rgba(196,84,122,.06);}
.plan-day-head{display:flex;align-items:center;gap:10px;margin-bottom:9px;flex-wrap:wrap;}
.plan-day-rel{font-size:13px;font-weight:600;color:var(--cream);}
.plan-day-date{font-size:11px;color:var(--t3);}
.plan-badge{font-size:10px;font-weight:600;padding:2px 8px;border-radius:999px;}
.plan-badge.exam{background:rgba(196,84,122,.18);color:var(--glow);}
.plan-badge.review{background:rgba(126,200,168,.18);color:var(--sage);}
.plan-day-items{display:flex;flex-direction:column;gap:7px;}
.plan-item{display:flex;align-items:center;gap:10px;width:100%;text-align:left;background:var(--surface2);border:1px solid var(--border2);border-radius:9px;padding:8px 11px;cursor:pointer;transition:border-color .15s;}
.plan-item:hover{border-color:var(--glow);}
.plan-item-sub{flex:none;font-size:10px;font-weight:600;padding:2px 7px;border:1px solid;border-radius:999px;}
.plan-item-name{flex:1;min-width:0;font-size:12.5px;color:var(--cream);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.plan-item-act{flex:none;font-size:11px;color:var(--t3);}
.plan-day-rest{font-size:12px;color:var(--t3);}
.plan-item-wrap{display:flex;flex-direction:column;}
.plan-menu{display:flex;flex-wrap:wrap;gap:6px;padding:8px 4px 2px;}
.plan-act{font-size:11px;padding:6px 12px;border-radius:8px;border:1px solid var(--border2);background:var(--surface2);color:var(--t2);cursor:pointer;transition:.15s;}
.plan-act:hover{border-color:var(--glow);color:var(--cream);}
.plan-act.suggested{border-color:var(--glow);color:var(--glow);font-weight:600;}
/* Mock Paper (Pro #5) */
.mock-head{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;flex-wrap:wrap;margin-bottom:16px;}
.mock-head-r{display:flex;align-items:center;gap:12px;}
.mock-timer{font-size:20px;font-weight:700;color:var(--cream);font-variant-numeric:tabular-nums;}
.mock-timer.low{color:var(--glow);}
.mock-submit{padding:8px 18px;border:none;border-radius:999px;background:linear-gradient(135deg,var(--burg),var(--plum));color:#fff;font-size:12px;font-weight:600;cursor:pointer;}
.mock-submit:hover{filter:brightness(1.12);}
.mock-submit.big{display:block;width:auto;margin:18px auto 6px;padding:12px 28px;font-size:14px;}
.mock-q{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:14px 16px;margin-bottom:12px;}
.mock-q-head{display:flex;align-items:center;gap:10px;margin-bottom:7px;}
.mock-q-num{font-size:13px;font-weight:700;color:var(--cream);}
.mock-q-marks{font-size:11px;color:var(--gold);}
.mock-q-text{font-size:13.5px;color:var(--t1);line-height:1.55;margin-bottom:10px;}
.mock-ans{width:100%;box-sizing:border-box;min-height:80px;padding:10px 12px;border:1px solid var(--border2);border-radius:9px;background:var(--surface2);color:var(--cream);font-size:13px;font-family:inherit;resize:vertical;}
.mock-ans:focus{outline:none;border-color:var(--glow);}
.mock-score{display:flex;align-items:baseline;gap:14px;justify-content:center;margin:6px 0 20px;}
.mock-score-big{font-size:38px;font-weight:800;}
.mock-score-pct{font-size:18px;font-weight:700;}
.mock-result-q{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:13px 15px;margin-bottom:11px;}
.mock-rq-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:6px;}
.mock-rq-award{font-size:14px;font-weight:700;}
.mock-rq-q{font-size:13px;color:var(--t1);line-height:1.5;margin-bottom:7px;}
.mock-rq-ans{font-size:12px;color:var(--t2);background:var(--surface2);border-radius:8px;padding:8px 10px;margin-bottom:7px;line-height:1.5;}
.mock-rq-ans strong{color:var(--cream);}
.mock-rq-fb{font-size:12.5px;color:var(--t1);line-height:1.6;border-left:2px solid var(--gold);padding-left:11px;}
.mock-end{margin-top:18px;display:flex;flex-direction:column;gap:10px;align-items:center;}
.mock-back{background:transparent;border:none;color:var(--t3);font-size:12px;cursor:pointer;}
.mock-back:hover{color:var(--glow);}
/* Friends & Leaderboard (Phase B1: #21 + #20 graph) */
.friends-home-card{display:flex;align-items:center;gap:13px;background:var(--surface2);border:1px solid var(--border2);border-radius:14px;padding:13px 16px;cursor:pointer;transition:.2s;width:100%;box-sizing:border-box;}
.friends-home-card:hover{border-color:var(--glow);}
.fh-icon{font-size:24px;flex:none;}
.fh-body{flex:1;min-width:0;}
.fh-title{font-size:13px;font-weight:600;color:var(--cream);}
.fh-sub{font-size:11px;color:var(--t3);margin-top:2px;}
.fh-arrow{color:var(--glow);font-size:16px;flex:none;}
.lb-list{display:flex;flex-direction:column;gap:8px;margin-top:6px;}
.lb-row{display:flex;align-items:center;gap:12px;background:var(--surface);border:1px solid var(--border);border-radius:11px;padding:11px 14px;}
.lb-row.me{border-color:var(--glow);background:rgba(196,84,122,.07);}
.lb-rank{flex:none;width:30px;font-size:15px;font-weight:700;color:var(--gold);text-align:center;}
.lb-name{flex:1;min-width:0;font-size:13.5px;font-weight:600;color:var(--cream);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.lb-streak{flex:none;font-size:12px;color:var(--glow);}
.lb-xp{flex:none;font-size:13px;font-weight:700;color:var(--sage);}
.lb-invite{font-size:12.5px;color:var(--t2);line-height:1.6;background:var(--surface);border:1px dashed var(--border2);border-radius:11px;padding:12px 14px;margin-top:12px;}
.lb-invite strong{color:var(--cream);}
.lb-challenge{flex:none;width:30px;height:30px;border-radius:8px;border:1px solid var(--border2);background:var(--surface2);font-size:14px;cursor:pointer;transition:.15s;}
.lb-challenge:hover{border-color:var(--glow);filter:brightness(1.15);}
/* Challenge a Friend (#20) */
.ch-item{display:flex;align-items:center;gap:10px;background:var(--surface);border:1px solid var(--border);border-radius:11px;padding:11px 14px;margin-bottom:9px;}
.ch-item-main{flex:1;min-width:0;}
.ch-item-concept{font-size:13.5px;font-weight:600;color:var(--cream);}
.ch-item-sub{font-size:11px;color:var(--t3);margin-top:2px;}
.ch-go{flex:none;padding:7px 13px;border-radius:9px;border:none;background:linear-gradient(135deg,var(--burg),var(--plum));color:#fff;font-size:11.5px;font-weight:600;cursor:pointer;}
.ch-go:hover{filter:brightness(1.12);}
.ch-item-wait{flex:none;font-size:11px;color:var(--t3);}
.ch-prompt{font-size:13px;color:var(--t2);line-height:1.6;margin:4px 0 10px;}
.ch-prompt strong{color:var(--cream);}
.ch-answer{width:100%;box-sizing:border-box;min-height:160px;padding:12px 14px;border:1px solid var(--border2);border-radius:11px;background:var(--surface2);color:var(--cream);font-size:13.5px;font-family:inherit;line-height:1.6;resize:vertical;}
.ch-answer:focus{outline:none;border-color:var(--glow);}
.ch-waiting{font-size:13px;color:var(--t2);text-align:center;background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:18px;line-height:1.6;}
.ch-winner{text-align:center;font-size:16px;font-weight:700;color:var(--cream);margin:6px 0 16px;}
.ch-cmp{display:grid;grid-template-columns:1fr 1fr;gap:12px;}
.ch-col{background:var(--surface);border:1px solid var(--border);border-radius:13px;padding:14px;}
.ch-col.win{border-color:var(--sage);background:rgba(126,200,168,.06);}
.ch-col-name{font-size:13px;font-weight:600;color:var(--cream);text-align:center;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.ch-total{font-size:30px;font-weight:800;text-align:center;margin:4px 0 10px;}
.ch-axis{display:flex;align-items:center;gap:7px;margin:5px 0;font-size:11px;color:var(--t3);}
.ch-axis-l{flex:none;width:60px;}
.ch-bar{flex:1;height:5px;border-radius:3px;background:var(--surface2);overflow:hidden;}
.ch-bar-fill{height:100%;border-radius:3px;}
.ch-axis-v{flex:none;width:22px;text-align:right;color:var(--t2);}
.ch-gap{font-size:11px;color:var(--t3);margin-top:9px;line-height:1.45;border-top:1px solid var(--border);padding-top:8px;}
@media(max-width:600px){.ch-cmp{grid-template-columns:1fr;}}
/* Class Mode (Phase D: #22) */
.class-choice{display:flex;flex-direction:column;gap:12px;margin-top:14px;}
.class-choice-card{background:var(--surface2);border:1px solid var(--border2);border-radius:14px;padding:18px 18px;cursor:pointer;transition:.2s;}
.class-choice-card:hover{border-color:var(--glow);}
.cc-icon{font-size:26px;}
.cc-title{font-size:15px;font-weight:700;color:var(--cream);margin-top:6px;}
.cc-sub{font-size:12px;color:var(--t3);margin-top:3px;line-height:1.5;}
.class-create{display:flex;gap:8px;margin-top:14px;align-items:center;}
.class-input{flex:1;min-width:0;box-sizing:border-box;padding:10px 13px;border:1px solid var(--border2);border-radius:11px;background:var(--surface2);color:var(--cream);font-size:13.5px;font-family:inherit;}
.class-input:focus{outline:none;border-color:var(--glow);}
.class-row{display:flex;align-items:center;gap:12px;background:var(--surface);border:1px solid var(--border);border-radius:11px;padding:13px 15px;margin-bottom:9px;cursor:pointer;transition:.15s;}
.class-row:hover{border-color:var(--glow);}
.class-row-main{flex:1;min-width:0;}
.class-row-name{font-size:14px;font-weight:600;color:var(--cream);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.class-row-code{font-size:11.5px;color:var(--t3);margin-top:2px;letter-spacing:.5px;}
.class-row-code strong{color:var(--glow);letter-spacing:1px;}
.roster-head{display:flex;align-items:center;gap:10px;padding:6px 14px 8px;font-size:11px;color:var(--t3);text-transform:uppercase;letter-spacing:.6px;}
.roster-list{display:flex;flex-direction:column;gap:8px;}
.roster-row{display:flex;align-items:center;gap:10px;background:var(--surface);border:1px solid var(--border);border-radius:11px;padding:11px 14px;}
.roster-name{flex:1;min-width:0;font-size:13.5px;font-weight:600;color:var(--cream);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.roster-stat{flex:none;width:78px;text-align:right;font-size:12.5px;font-weight:600;color:var(--t2);}
.roster-stat.good{color:var(--sage);}
.roster-stat.mid{color:var(--gold);}
.roster-stat.low{color:var(--glow);}
.class-section-h{font-size:11px;color:var(--t3);text-transform:uppercase;letter-spacing:.6px;margin:6px 0 9px;font-weight:600;}
/* assignments (teacher + student) */
.assign-list{display:flex;flex-direction:column;gap:8px;}
.assign-row,.swork-row{display:flex;align-items:center;gap:10px;background:var(--surface);border:1px solid var(--border);border-radius:11px;padding:10px 13px;}
.assign-kind{flex:none;font-size:10.5px;font-weight:700;padding:3px 9px;border-radius:7px;text-transform:uppercase;letter-spacing:.4px;}
.k-teach{background:rgba(196,84,122,.16);color:var(--glow);}
.k-mock{background:rgba(214,178,94,.18);color:var(--gold);}
.k-notes{background:rgba(126,200,168,.16);color:var(--sage);}
.assign-concept{flex:1;min-width:0;font-size:13px;font-weight:600;color:var(--cream);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.assign-done{flex:none;font-size:11px;color:var(--t3);}
.assign-del{flex:none;width:24px;height:24px;border-radius:7px;border:1px solid var(--border2);background:var(--surface2);color:var(--t3);font-size:11px;cursor:pointer;}
.assign-del:hover{border-color:var(--glow);color:var(--glow);}
.assign-kind-pick{display:flex;gap:8px;margin:14px 0 4px;}
.ak-btn{flex:1;padding:9px 0;border-radius:10px;border:1px solid var(--border2);background:var(--surface2);color:var(--t2);font-size:12.5px;font-weight:600;cursor:pointer;transition:.15s;}
.ak-btn.active{border-color:var(--glow);background:rgba(196,84,122,.1);color:var(--cream);}
/* student class cards */
.sclass-card{background:var(--surface2);border:1px solid var(--border2);border-radius:13px;padding:13px 14px;margin-bottom:12px;}
.sclass-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px;}
.sclass-name{font-size:14px;font-weight:700;color:var(--cream);}
.sclass-leave{font-size:11px;color:var(--t3);background:none;border:none;cursor:pointer;}
.sclass-leave:hover{color:var(--glow);}
.swork-row{margin-bottom:8px;}
.swork-go{flex:none;padding:6px 12px;border-radius:9px;border:none;background:linear-gradient(135deg,var(--burg),var(--plum));color:#fff;font-size:11.5px;font-weight:600;cursor:pointer;}
.swork-go:hover{filter:brightness(1.12);}
.swork-mark{flex:none;width:28px;height:28px;border-radius:8px;border:1px solid var(--border2);background:var(--surface);color:var(--sage);font-size:13px;cursor:pointer;}
.swork-mark:hover{border-color:var(--sage);}
.swork-done{flex:none;font-size:11.5px;font-weight:600;color:var(--sage);}
.swork-empty{font-size:12px;color:var(--t3);padding:4px 2px;}
/* class-wide weak spots */
.cws-list{display:flex;flex-direction:column;gap:8px;}
.cws-row{display:flex;align-items:center;gap:10px;background:var(--surface);border:1px solid var(--border);border-radius:11px;padding:10px 13px;}
.cws-concept{flex:none;width:34%;min-width:0;font-size:12.5px;font-weight:600;color:var(--cream);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.cws-bar{flex:1;height:6px;border-radius:4px;background:var(--surface2);overflow:hidden;}
.cws-bar-fill{height:100%;border-radius:4px;}
.cws-avg{flex:none;width:38px;text-align:right;font-size:12.5px;font-weight:700;}
.cws-weak{flex:none;width:58px;text-align:right;font-size:10.5px;color:var(--t3);}
@media(max-width:600px){.cws-concept{width:30%;}.cws-weak{display:none;}}
/* Study Rooms (Phase E: #19) */
.room-codebar{font-size:12px;color:var(--t2);background:var(--surface);border:1px dashed var(--border2);border-radius:11px;padding:10px 14px;margin-bottom:14px;}
.room-codebar strong{color:var(--glow);letter-spacing:1px;}
.room-people{display:flex;flex-wrap:wrap;gap:8px;}
.room-person{display:flex;align-items:center;gap:7px;background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:8px 12px;}
.rp-dot{width:8px;height:8px;border-radius:50%;background:var(--sage);flex:none;box-shadow:0 0 6px var(--sage);}
.rp-name{font-size:12.5px;font-weight:600;color:var(--cream);}
.room-live{display:flex;flex-direction:column;gap:9px;}
.rl-row{display:flex;align-items:center;gap:11px;background:var(--surface);border:1px solid var(--border);border-radius:11px;padding:11px 14px;}
.rl-name{flex:none;width:34%;min-width:0;display:flex;align-items:center;gap:7px;font-size:12.5px;font-weight:600;color:var(--cream);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.rl-bar{flex:1;height:7px;border-radius:4px;background:var(--surface2);overflow:hidden;}
.rl-bar-fill{height:100%;border-radius:4px;transition:width .4s ease;}
.rl-val{flex:none;width:38px;text-align:right;font-size:12.5px;font-weight:700;color:var(--t2);}
@media(max-width:600px){.rl-name{width:38%;}}
.room-messages{display:flex;flex-direction:column;gap:12px;max-height:46vh;overflow-y:auto;padding:6px 2px;margin-top:6px;}
.room-inputbar{display:flex;gap:8px;align-items:flex-end;margin-top:10px;}
.room-input{flex:1;box-sizing:border-box;resize:none;max-height:130px;padding:11px 14px;border:1px solid var(--border2);border-radius:13px;background:var(--surface2);color:var(--cream);font-size:13.5px;font-family:inherit;line-height:1.5;}
.room-input:focus{outline:none;border-color:var(--glow);}
.room-send{flex:none;width:42px;height:42px;border-radius:12px;border:none;background:linear-gradient(135deg,var(--burg),var(--plum));color:#fff;font-size:16px;cursor:pointer;}
.room-send:hover{filter:brightness(1.12);}
.room-send:disabled{opacity:.5;cursor:default;}
.room-results{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:6px;}
.rres-card{background:var(--surface);border:1px solid var(--border);border-radius:13px;padding:14px;}
.rres-card.win{border-color:var(--sage);background:rgba(126,200,168,.06);}
.rres-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px;}
.rres-name{font-size:13.5px;font-weight:700;color:var(--cream);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.rres-score{font-size:16px;font-weight:800;flex:none;}
.rres-report{font-size:12px;line-height:1.55;color:var(--t2);}
@media(max-width:600px){.room-results{grid-template-columns:1fr;}}
/* Spaced Repetition Review Queue (Pro #8) */
.rev-list{display:flex;flex-direction:column;gap:9px;}
.rev-item{display:flex;align-items:center;gap:10px;background:var(--surface);border:1px solid var(--border);border-radius:11px;padding:11px 14px;}
.rev-main{flex:1;min-width:0;cursor:pointer;}
.rev-name{font-size:13.5px;font-weight:600;color:var(--cream);}
.rev-sub{font-size:11px;color:var(--t3);margin-top:2px;}
.rev-actions{display:flex;gap:7px;flex:none;}
.rev-btn{width:34px;height:34px;border-radius:9px;border:1px solid;background:var(--surface2);font-size:14px;cursor:pointer;transition:filter .15s;}
.rev-btn:hover{filter:brightness(1.15);}
.rev-btn.got{border-color:rgba(126,200,168,.5);color:var(--sage);}
.rev-btn.shaky{border-color:rgba(200,169,110,.5);color:var(--gold);}
.rev-foot{font-size:11px;color:var(--t3);margin-top:14px;line-height:1.5;}
/* Compare Concepts (Pro #6) */
.cmp-sg-title{font-size:12px;color:var(--t2);margin:6px 0 8px;font-weight:600;}
.cmp-pair{display:block;width:100%;text-align:left;background:var(--surface);border:1px solid var(--border);border-radius:11px;padding:11px 14px;margin-bottom:8px;cursor:pointer;transition:border-color .15s;}
.cmp-pair:hover{border-color:var(--glow);}
.cmp-pair-names{display:block;font-size:14px;font-weight:600;color:var(--cream);}
.cmp-pair-why{display:block;font-size:11px;color:var(--t3);margin-top:3px;}
.cmp-vs{color:var(--glow);font-weight:600;font-size:12px;margin:0 4px;}
.cmp-manual{margin-top:18px;background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:14px;}
.cmp-manual-title{font-size:12px;color:var(--t2);margin-bottom:10px;}
.cmp-selects{display:flex;align-items:center;gap:8px;flex-wrap:wrap;}
.cmp-selects select{flex:1;min-width:120px;}
.cmp-result{font-size:13.5px;line-height:1.65;color:var(--t1);}
.cmp-result h3{font-size:15px;color:var(--glow);margin:6px 0 10px;}
.cmp-result strong{color:var(--cream);}
.cmp-result p{margin:8px 0;}
/* Mind Map / Timeline (Pro #13) */
.mm-legend{font-size:12px;color:var(--t3);margin:2px 0 16px;}
.mm-map{display:flex;flex-direction:column;align-items:center;gap:4px;}
.mm-level{width:100%;}
.mm-level-label{font-size:11px;font-weight:600;color:var(--t2);text-align:center;margin-bottom:8px;letter-spacing:.02em;}
.mm-level-row{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;}
.mm-node{text-align:left;background:var(--surface);border:1px solid var(--border2);border-radius:11px;padding:10px 13px;cursor:pointer;transition:.15s;max-width:230px;}
.mm-node:hover{border-color:var(--glow);transform:translateY(-1px);}
.mm-node-name{font-size:13px;font-weight:600;color:var(--cream);}
.mm-node-note{font-size:11px;color:var(--t3);margin-top:3px;line-height:1.45;}
.mm-builds{font-size:10px;color:var(--plum-lt);margin-top:5px;}
.mm-arrow{color:var(--plum-lt);font-size:18px;line-height:1;margin:2px 0;}
.mm-timeline{position:relative;padding-left:8px;}
.mm-timeline:before{content:'';position:absolute;left:13px;top:6px;bottom:6px;width:2px;background:rgba(155,126,200,.4);}
.mm-tl-item{display:flex;gap:14px;align-items:flex-start;padding:6px 0;cursor:pointer;position:relative;}
.mm-tl-dot{flex:none;width:12px;height:12px;border-radius:50%;background:var(--plum-lt);margin-top:4px;z-index:1;box-shadow:0 0 0 4px var(--bg);}
.mm-tl-body{flex:1;background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:9px 13px;transition:.15s;}
.mm-tl-item:hover .mm-tl-body{border-color:var(--glow);}
.mm-tl-when{font-size:11px;font-weight:600;color:var(--gold);}
.mm-tl-name{font-size:13px;font-weight:600;color:var(--cream);margin:1px 0 2px;}
.mm-tl-note{font-size:11.5px;color:var(--t3);line-height:1.45;}
.plan-ln-btn{width:100%;box-sizing:border-box;margin-bottom:14px;padding:11px 14px;border:1px solid rgba(155,126,200,.4);border-radius:11px;background:linear-gradient(135deg,rgba(40,25,70,.5),rgba(60,30,80,.4));color:#d9cdf0;font-size:13px;font-weight:600;cursor:pointer;transition:.15s;}
.plan-ln-btn:hover{border-color:var(--glow);filter:brightness(1.12);}
/* Last Night Mode (Pro #11) — dedicated dark immersive overlay (theme-independent) */
.ln-overlay{position:fixed;inset:0;z-index:9999;display:none;align-items:center;justify-content:center;background:radial-gradient(120% 90% at 50% 0%,#1a1230 0%,#0d0a16 55%,#070509 100%);color:#e9e2f4;padding:20px;box-sizing:border-box;overflow-y:auto;}
.ln-inner{width:100%;max-width:480px;display:flex;flex-direction:column;align-items:center;text-align:center;gap:14px;position:relative;padding:24px 4px;}
.ln-x{position:absolute;top:-6px;right:-2px;width:34px;height:34px;border-radius:50%;background:rgba(255,255,255,.06);color:#cfc6e0;font-size:15px;cursor:pointer;border:none;}
.ln-x:hover{background:rgba(255,255,255,.12);}
.ln-x.small{position:static;width:30px;height:30px;flex:none;}
.ln-moon{font-size:46px;line-height:1;filter:drop-shadow(0 0 18px rgba(155,126,200,.5));}
.ln-title{font-size:23px;font-weight:700;color:#f3eefb;}
.ln-sub{font-size:14px;color:#a99fc4;margin-top:-6px;}
.ln-info{font-size:13.5px;color:#c4bad9;line-height:1.6;max-width:360px;}
.ln-info strong{color:#f3eefb;}
.ln-dur-label{font-size:12px;color:#a99fc4;margin-top:6px;}
.ln-durs{display:flex;gap:10px;}
.ln-dur{font-size:13px;padding:9px 18px;border-radius:999px;border:1px solid rgba(155,126,200,.35);background:rgba(255,255,255,.03);color:#c4bad9;cursor:pointer;transition:.15s;}
.ln-dur.active{background:linear-gradient(135deg,#7a4a90,#c4547a);border-color:transparent;color:#fff;font-weight:600;}
.ln-start{margin-top:8px;padding:12px 30px;border:none;border-radius:999px;background:linear-gradient(135deg,#7a4a90,#c4547a);color:#fff;font-size:14px;font-weight:600;cursor:pointer;transition:filter .15s;}
.ln-start:hover{filter:brightness(1.13);}
.ln-end-close{padding:10px 26px;border:1px solid rgba(255,255,255,.18);border-radius:999px;background:transparent;color:#c4bad9;font-size:13px;cursor:pointer;}
.ln-end-btns{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;margin-top:6px;}
.ln-loading{display:flex;gap:6px;margin:6px 0;}
.ln-loading .dot{width:8px;height:8px;border-radius:50%;background:#9b7ec8;animation:lnpulse 1.2s infinite;}
.ln-loading .dot:nth-child(2){animation-delay:.2s;}.ln-loading .dot:nth-child(3){animation-delay:.4s;}
@keyframes lnpulse{0%,100%{opacity:.3;transform:scale(.8);}50%{opacity:1;transform:scale(1.1);}}
.ln-summary{font-size:15px;color:#e9e2f4;}.ln-summary strong{color:#f3eefb;}
.ln-summary-sub{font-size:13px;color:#a99fc4;max-width:340px;line-height:1.6;}
/* blitz */
.ln-inner.blitz{max-width:520px;gap:12px;}
.ln-top{display:flex;align-items:center;justify-content:space-between;width:100%;gap:10px;}
.ln-pause{padding:7px 15px;border:1px solid rgba(155,126,200,.35);border-radius:999px;background:rgba(255,255,255,.04);color:#d9cdf0;font-size:12px;cursor:pointer;}
.ln-pause:hover{border-color:var(--glow);}
.ln-timer{font-size:26px;font-weight:700;color:#f3eefb;font-variant-numeric:tabular-nums;}
.ln-timer.low{color:#e87a9a;}
.ln-progress{width:100%;height:6px;border-radius:3px;background:rgba(255,255,255,.08);overflow:hidden;}
.ln-progress-fill{height:100%;background:linear-gradient(90deg,#7a4a90,#c4547a);border-radius:3px;transition:width .3s;}
.ln-progress-txt{font-size:11px;color:#a99fc4;}
.ln-card{width:100%;height:300px;perspective:1200px;cursor:pointer;}
.ln-card-inner{position:relative;width:100%;height:100%;transition:transform .5s;transform-style:preserve-3d;}
.ln-card.flipped .ln-card-inner{transform:rotateY(180deg);}
.ln-card-front,.ln-card-back{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;padding:26px;box-sizing:border-box;border-radius:18px;border:1px solid rgba(155,126,200,.25);background:linear-gradient(160deg,rgba(40,28,64,.85),rgba(24,16,38,.9));}
.ln-card-back{transform:rotateY(180deg);background:linear-gradient(160deg,rgba(36,28,58,.9),rgba(20,16,34,.92));}
.ln-card-concept{font-size:11px;text-transform:uppercase;letter-spacing:.06em;color:#9b7ec8;}
.ln-card-text{font-size:17px;line-height:1.5;color:#f1ecfa;}
.ln-card-back .ln-card-text{font-size:15px;}
.ln-card-hint{position:absolute;bottom:14px;font-size:11px;color:#7a6f96;}
.ln-rate{display:flex;gap:12px;width:100%;}
.ln-rate-btn{flex:1;padding:13px;border-radius:12px;border:none;font-size:14px;font-weight:600;cursor:pointer;transition:filter .15s;}
.ln-rate-btn.got{background:linear-gradient(135deg,#3f8f6a,#5bb88a);color:#fff;}
.ln-rate-btn.shaky{background:rgba(255,255,255,.06);color:#e0a86e;border:1px solid rgba(224,168,110,.4);}
.ln-rate-btn:hover{filter:brightness(1.12);}
.ln-rate-hint{font-size:12px;color:#7a6f96;}
/* Home card */
.ln-home-card{display:flex;align-items:center;gap:13px;background:linear-gradient(135deg,rgba(40,25,70,.55),rgba(60,28,78,.4));border:1px solid rgba(155,126,200,.4);border-radius:14px;padding:13px 16px;cursor:pointer;transition:.2s;width:100%;box-sizing:border-box;}
.ln-home-card:hover{border-color:var(--glow);filter:brightness(1.08);}
.ln-home-moon{font-size:26px;flex:none;filter:drop-shadow(0 0 10px rgba(155,126,200,.5));}
.ln-home-body{flex:1;min-width:0;}
.ln-home-title{font-size:13px;font-weight:600;color:var(--cream);}
.ln-home-sub{font-size:11px;color:var(--t3);margin-top:2px;}
.ln-home-arrow{color:var(--glow);font-size:16px;flex:none;}

/* ── EXAM COUNTDOWN ── */
.exam-countdown-label{font-size:10px;color:var(--t3);text-transform:uppercase;letter-spacing:.06em;margin-bottom:8px;}
.exam-chips-row{display:flex;gap:8px;flex-wrap:wrap;}
.exam-chip{display:flex;align-items:center;gap:8px;padding:8px 14px;background:var(--surface);border:1px solid var(--border);border-radius:999px;cursor:pointer;}
.exam-chip.soon{border-color:var(--gold);background:rgba(200,169,110,.08);}
.exam-chip.urgent{border-color:var(--glow);background:rgba(196,84,122,.08);}
.exam-chip-subject{font-size:12px;color:var(--cream);}
.exam-chip-days{font-size:11px;color:var(--t3);font-weight:500;}
.exam-chip.soon .exam-chip-days{color:var(--gold);}
.exam-chip.urgent .exam-chip-days{color:var(--glow);}

/* ── REVIEW BANNER ── */
.review-banner{display:flex;align-items:center;gap:10px;padding:12px 16px;background:rgba(155,126,200,.1);border:1px solid rgba(155,126,200,.25);border-radius:var(--r);cursor:pointer;font-size:13px;color:var(--cream2);transition:all .15s;margin-bottom:8px;}
.review-banner:hover{background:rgba(155,126,200,.18);}
.review-banner-arrow{margin-left:auto;color:var(--plum-lt);}

/* ── FLASHCARDS ── */
.fc-nav{display:flex;align-items:center;gap:10px;margin-bottom:18px;justify-content:space-between;}
.fc-progress{font-size:11px;color:var(--sage);font-weight:600;min-width:60px;}
.fc-rate{display:flex;gap:10px;max-width:480px;margin:14px auto 0;}
.fc-rate-btn{flex:1;padding:11px;border-radius:11px;border:1px solid;font-size:13px;font-weight:600;cursor:pointer;background:var(--surface2);transition:filter .15s;}
.fc-rate-btn:hover{filter:brightness(1.12);}
.fc-rate-btn.again{border-color:rgba(196,84,122,.5);color:var(--glow);}
.fc-rate-btn.good{border-color:rgba(200,169,110,.5);color:var(--gold);}
.fc-rate-btn.easy{border-color:rgba(126,200,168,.5);color:var(--sage);}
.flashcard{width:100%;max-width:480px;height:220px;margin:0 auto;perspective:1000px;cursor:pointer;}
.flashcard-inner{width:100%;height:100%;position:relative;transform-style:preserve-3d;transition:transform .5s ease;}
.flashcard.flipped .flashcard-inner{transform:rotateY(180deg);}
.flashcard-front,.flashcard-back{position:absolute;inset:0;backface-visibility:hidden;background:var(--surface);border:1px solid var(--border);border-radius:var(--rl);padding:24px;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;}
.flashcard-back{transform:rotateY(180deg);background:var(--surface2);border-color:var(--plum);}
.fc-label{font-size:10px;color:var(--t3);text-transform:uppercase;letter-spacing:.06em;margin-bottom:12px;}
.fc-text{font-size:15px;color:var(--cream);line-height:1.6;font-family:var(--fh);}
.flashcard-back .fc-text{font-size:13px;color:var(--cream2);}

/* ── QUICK REFERENCE NOTES ── */
.tag-qr{background:rgba(155,126,200,.12);color:var(--plum-lt);}
.tag-ex{background:rgba(107,168,220,.12);color:#6BA8DC;}
.tag-mis{background:rgba(196,84,122,.1);color:var(--glow);}
.notes-quickref .notes-card{background:var(--bg2);}

/* ── PAPERS BUTTON ── */
.papers-open-btn{display:inline-block;padding:12px 24px;background:var(--surface2);border:1px solid var(--plum);border-radius:var(--r);color:var(--plum-lt);font-size:13px;font-weight:500;text-decoration:none;transition:all .15s;}
.papers-open-btn:hover{background:var(--plum);color:white;}

/* ── CODE BLOCKS ── */
.bubble pre{background:rgba(0,0,0,.3);border-radius:6px;padding:10px 12px;margin:6px 0;overflow-x:auto;}
.bubble code{font-family:monospace;font-size:12px;color:var(--sage);}
.bubble pre code{color:var(--cream2);}
.notes-card pre{background:rgba(0,0,0,.2);border-radius:6px;padding:10px 12px;margin:8px 0;overflow-x:auto;}
.notes-card code{font-family:monospace;font-size:12px;color:var(--sage);}

/* ── MOBILE: STACKED FILTER PANEL ── */
@media(max-width:720px){
  .panel-layout{flex-direction:column;}
  .filter-panel{width:100%;min-width:unset;max-height:180px;border-right:none;border-bottom:1px solid var(--border);flex-direction:row;overflow-x:auto;overflow-y:hidden;flex-wrap:nowrap;padding:8px 10px;gap:0;-webkit-overflow-scrolling:touch;}
  .filter-panel .fp-label{white-space:nowrap;padding:3px 8px 2px;font-size:9px;}
  .filter-panel .fp-list{flex-direction:row;flex-wrap:nowrap;gap:4px;margin-right:12px;}
  .filter-panel .fp-item{white-space:nowrap;padding:5px 10px;font-size:11px;border-radius:999px;border:1px solid var(--border);background:transparent;}
  .filter-panel .fp-item.active{border-color:var(--glow);background:rgba(196,84,122,.1);}
  .filter-panel .fp-gen,.filter-panel .fp-add{display:none;}
  .content-panel{padding:14px;}
  .chat-panel{min-height:0;}
}

/* ── PRIVACY / TERMS LINK ── */
.legal-links{display:flex;gap:16px;justify-content:center;padding:16px 0;font-size:11px;color:var(--t3);}
.legal-links a{color:var(--t3);text-decoration:none;transition:color .15s;}
.legal-links a:hover{color:var(--plum-lt);}

/* ── PRO COMING SOON ── */
.pro-coming-section{border-color:rgba(196,84,122,.2) !important;background:linear-gradient(135deg,var(--surface) 0%,rgba(74,45,110,.15) 100%) !important;}
.pro-features-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;}
.pro-feature-card{background:var(--surface2);border:1px solid var(--border);border-radius:var(--r);padding:12px;}
.pro-feature-icon{font-size:20px;margin-bottom:6px;}
.pro-feature-name{font-size:12px;font-weight:600;color:var(--cream);margin-bottom:4px;}
.pro-feature-desc{font-size:11px;color:var(--t2);line-height:1.55;}
@media(max-width:480px){.pro-features-grid{grid-template-columns:1fr;}}

/* ── PRO VOTE ── */
.pro-vote-btn{margin-top:8px;padding:5px 12px;border-radius:6px;border:1px solid var(--border2);color:var(--t3);font-size:11px;font-family:var(--fb);cursor:pointer;transition:all .15s;background:transparent;width:100%;}
.pro-vote-btn:hover,.pro-vote-btn.active{border-color:var(--glow);color:var(--glow);background:rgba(196,84,122,.08);}
.pro-vote-form{margin-top:8px;display:none;}
.pro-vote-form.open{display:block;}
.pro-vote-text,.pro-vote-email{width:100%;padding:7px 10px;background:var(--bg2);border:1px solid var(--border2);border-radius:7px;color:var(--cream);font-size:11px;font-family:var(--fb);outline:none;margin-bottom:6px;resize:none;}
.pro-vote-text:focus,.pro-vote-email:focus{border-color:var(--plum-lt);}
.pro-vote-text::placeholder,.pro-vote-email::placeholder{color:var(--t3);}
.pro-vote-submit{width:100%;padding:7px;border-radius:7px;background:linear-gradient(135deg,var(--burg),var(--plum));color:white;font-size:11px;font-weight:500;font-family:var(--fb);cursor:pointer;border:none;transition:filter .15s;}
.pro-vote-submit:hover{filter:brightness(1.12);}

/* ── STREAK ── */
.streak-row{display:flex;align-items:center;gap:10px;padding:10px 14px;background:var(--surface);border:1px solid var(--border);border-radius:var(--r);width:100%;}
.streak-fire{font-size:16px;flex-shrink:0;}
.streak-count{font-size:12px;color:var(--cream);font-weight:500;white-space:nowrap;}
.streak-dots{display:flex;gap:5px;margin-left:auto;}
.streak-dot{width:8px;height:8px;border-radius:50%;background:var(--surface3);}
.streak-dot.active{background:var(--gold);}
.streak-dot.today.active{background:var(--glow);box-shadow:0 0 6px rgba(196,84,122,.5);}

/* ── SEARCH NOTES ── */
.notes-search-wrap{padding:10px 9px 4px;border-bottom:1px solid var(--border);}
.notes-search-input{width:100%;padding:7px 10px;border-radius:8px;border:1px solid var(--border2);background:var(--surface);color:var(--cream);font-size:12px;outline:none;font-family:var(--fb);}
.notes-search-input:focus{border-color:var(--plum-lt);}
.notes-search-input::placeholder{color:var(--t3);}
.notes-search-results{padding:6px 9px;}
.notes-search-result{padding:6px 10px;border-radius:7px;font-size:12px;color:var(--cream2);cursor:pointer;transition:all .12s;line-height:1.4;border-bottom:1px solid var(--border);}
.notes-search-result:last-child{border-bottom:none;}
.notes-search-result:hover{background:var(--surface2);color:var(--cream);}
.notes-search-result b{color:var(--glow);}

/* ── DEPTH BAR ── */
.depth-bar-wrap{padding:8px 18px;border-bottom:1px solid var(--border);background:var(--bg2);flex-shrink:0;display:none;align-items:center;gap:10px;}
.depth-bar-wrap.visible{display:flex;}

/* ── PAPERS MARK ── */
.papers-tab-row{display:flex;gap:6px;margin-bottom:20px;}
.papers-tab{flex:1;padding:9px;border-radius:var(--r);border:1px solid var(--border);color:var(--t3);font-size:12px;font-weight:500;font-family:var(--fb);cursor:pointer;text-align:center;transition:all .15s;background:transparent;}
.papers-tab.active{border-color:var(--plum-lt);color:var(--plum-lt);background:rgba(155,126,200,.1);}
.papers-tab.mark-tab.active{border-color:var(--glow);color:var(--glow);background:rgba(196,84,122,.08);}
.mark-upload-zone{border:2px dashed var(--border2);border-radius:10px;padding:14px 10px;text-align:center;cursor:pointer;transition:border-color .2s;min-height:90px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;}
.mark-upload-zone:hover{border-color:var(--glow);}
.mark-upload-hint{font-size:12px;color:var(--t3);}
.mark-upload-area{border:2px dashed var(--border2);border-radius:var(--rl);padding:28px 20px;text-align:center;cursor:pointer;transition:all .2s;margin-bottom:16px;}
.mark-upload-area:hover{border-color:var(--plum-lt);background:rgba(155,126,200,.05);}
.mark-upload-icon{font-size:28px;margin-bottom:8px;}
.mark-upload-label{font-size:13px;color:var(--cream2);margin-bottom:4px;}
.mark-upload-sub{font-size:11px;color:var(--t3);}
.mark-result{background:var(--surface);border:1px solid rgba(126,200,168,.2);border-radius:var(--rl);padding:20px;margin-top:16px;}
.mark-result-header{font-family:var(--fh);font-size:15px;color:var(--cream);margin-bottom:14px;display:flex;align-items:center;gap:8px;}
.mark-score-pill{font-size:11px;padding:3px 10px;border-radius:999px;background:rgba(126,200,168,.15);color:var(--sage);font-weight:500;}
.mark-field{margin-bottom:10px;}
.mark-label{font-size:10px;color:var(--t3);text-transform:uppercase;letter-spacing:.05em;margin-bottom:4px;}
.mark-value{font-size:12px;color:var(--cream2);line-height:1.7;}

/* ── SHARE NOTE ── */
.share-note-btn{margin-top:6px;padding:6px 12px;border-radius:8px;border:1px solid var(--border2);color:var(--t3);font-size:11px;font-family:var(--fb);cursor:pointer;transition:all .15s;background:transparent;width:100%;}
.share-note-btn:hover{border-color:var(--sage);color:var(--sage);}
.share-url-wrap{margin-top:8px;display:flex;gap:6px;}
.share-url-input{flex:1;padding:6px 10px;background:var(--bg2);border:1px solid var(--border2);border-radius:7px;color:var(--sage);font-size:11px;font-family:monospace;outline:none;}
.share-copy-btn{padding:6px 12px;border-radius:7px;background:var(--surface2);border:1px solid var(--border2);color:var(--cream2);font-size:11px;font-family:var(--fb);cursor:pointer;white-space:nowrap;transition:all .15s;}
.share-copy-btn:hover{border-color:var(--sage);color:var(--sage);}

/* ── SHARED NOTE VIEWER ── */
.shared-note-overlay{position:fixed;inset:0;background:rgba(0,0,0,.82);z-index:500;overflow-y:auto;padding:20px;display:flex;justify-content:center;align-items:flex-start;}
.shared-note-inner{max-width:680px;width:100%;background:var(--surface);border:1px solid var(--border2);border-radius:var(--rl);padding:24px;position:relative;margin:auto;}

/* ── PUSH SETTINGS ── */
.push-toggle-row{display:flex;align-items:center;justify-content:space-between;padding:10px 0;}
.push-toggle{width:42px;height:24px;border-radius:12px;background:var(--surface3);border:none;cursor:pointer;position:relative;transition:background .2s;flex-shrink:0;}
.push-toggle.on{background:var(--sage);}
.push-toggle::after{content:'';position:absolute;top:3px;left:3px;width:18px;height:18px;border-radius:50%;background:white;transition:transform .2s;}
.push-toggle.on::after{transform:translateX(18px);}

@keyframes skPulse{0%,100%{opacity:.4}50%{opacity:.8}}
@keyframes fadeIn{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}

/* ── FEEDBACK BUTTON ── */
#feedbackBtn{position:fixed;bottom:76px;right:14px;z-index:900;padding:7px 14px;border-radius:999px;background:rgba(196,84,122,.15);border:1px solid rgba(196,84,122,.35);color:var(--glow);font-size:11px;cursor:pointer;letter-spacing:.03em;backdrop-filter:blur(8px);transition:background .2s;}
#feedbackBtn:hover{background:rgba(196,84,122,.28);}
#feedbackOverlay{position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:910;}
#feedbackBox{position:fixed;bottom:130px;right:16px;z-index:920;width:min(340px,calc(100vw - 32px));background:var(--surface);border:1px solid var(--border2);border-radius:16px;padding:20px;box-shadow:0 8px 32px rgba(0,0,0,.4);}
#feedbackTitle{font-size:14px;color:var(--cream);font-weight:500;margin-bottom:12px;line-height:1.5;}
#feedbackBox textarea{width:100%;box-sizing:border-box;background:var(--surface2);border:1px solid var(--border2);border-radius:10px;color:var(--cream);font-size:13px;padding:10px 12px;resize:none;outline:none;line-height:1.6;font-family:inherit;}
#feedbackBox textarea:focus{border-color:var(--glow);}
#feedbackActions{display:flex;gap:8px;margin-top:10px;justify-content:flex-end;}
.fb-cancel{padding:7px 16px;border-radius:8px;border:1px solid var(--border2);background:none;color:var(--t2);font-size:13px;cursor:pointer;}
.fb-send{padding:7px 18px;border-radius:8px;border:none;background:var(--glow);color:white;font-size:13px;cursor:pointer;font-weight:500;}
.fb-send:disabled{opacity:.5;cursor:default;}
#feedbackStatus{font-size:12px;color:var(--sage);margin-top:8px;text-align:center;min-height:16px;}

/* ── LIGHT MODE ADDITIONS ── */
body.light-mode .streak-row{background:#EDE5F5;}
body.light-mode .notes-search-input{background:#EDE5F5;}
body.light-mode .mark-upload-area{border-color:rgba(0,0,0,.15);}
body.light-mode .mark-result{background:#EDE5F5;}
body.light-mode .pro-vote-text,body.light-mode .pro-vote-email{background:#EDE5F5;}

/* ── CROSS-BROWSER & iOS FIXES ── */
*{scrollbar-width:thin;scrollbar-color:var(--surface3) transparent;}
input[type="date"]{-webkit-appearance:none;appearance:none;color-scheme:dark;}
body.light-mode input[type="date"]{color-scheme:light;}
@supports(-webkit-touch-callout:none){
  .bottom-nav{padding-bottom:max(10px,env(safe-area-inset-bottom));}
  .aw-toast{bottom:max(30px,calc(env(safe-area-inset-bottom)+12px));}
  @media(max-width:720px){
    .aw-toast{bottom:max(84px,calc(env(safe-area-inset-bottom)+78px));}
    .main{padding-bottom:calc(68px + env(safe-area-inset-bottom));}
  }
}

/* ── MOBILE IMPROVEMENTS ── */
@media(max-width:720px){
  .home-inner{padding:16px 14px 100px;}
  .mode-grid{gap:8px;}
  .mode-card{padding:13px 10px 11px;}
  .bubble{max-width:88%;}
  .q-card{padding:14px 14px;}
  .notes-card{padding:14px 14px;}
  .flashcard{height:180px;}
  .fc-text{font-size:13px;}
  .pro-features-grid{grid-template-columns:1fr;}
}

/* ── TUTORIAL / ONBOARDING GUIDE (REQ-001) ── */
.tour-btn{margin:10px auto 0;display:inline-block;padding:8px 16px;border-radius:999px;
  border:1px solid var(--border2);background:var(--surface2);color:var(--cream);
  font-size:12.5px;font-weight:600;cursor:pointer;transition:transform .12s,border-color .12s;}
.tour-btn:hover{transform:translateY(-1px);border-color:var(--glow);}
.tutorial-scroll{height:100%;overflow-y:auto;-webkit-overflow-scrolling:touch;}
.tutorial-inner{max-width:760px;margin:0 auto;padding:22px 18px 60px;}
.tut-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px;}
.tut-title{font-family:var(--fh);font-size:26px;color:var(--cream);}
.tut-close{width:34px;height:34px;border-radius:8px;border:1px solid var(--border2);
  background:var(--surface);color:var(--t2);font-size:15px;cursor:pointer;}
.tut-close:hover{border-color:var(--glow);color:var(--cream);}
.tut-why{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:16px 18px;margin-bottom:20px;}
.tut-why p{font-size:14px;line-height:1.62;color:var(--t2);margin:0 0 10px;}
.tut-why p:last-child{margin-bottom:0;}
.tut-why strong{color:var(--cream);}
.tut-group{margin-bottom:22px;}
.tut-group-title{font-size:16px;font-weight:700;color:var(--cream);margin-bottom:3px;}
.tut-group-intro{font-size:12.5px;color:var(--t3);margin-bottom:11px;line-height:1.5;}
.tut-items{display:flex;flex-direction:column;gap:9px;}
.tut-item{display:flex;align-items:center;gap:12px;background:var(--surface);
  border:1px solid var(--border);border-radius:12px;padding:13px 15px;transition:border-color .12s;}
.tut-item:hover{border-color:var(--border2);}
.tut-item-main{flex:1;min-width:0;}
.tut-item-name{font-size:14px;font-weight:600;color:var(--cream);margin-bottom:3px;}
.tut-item-desc{font-size:12.5px;color:var(--t2);line-height:1.5;}
.tut-go{flex-shrink:0;align-self:flex-start;padding:7px 13px;border-radius:8px;border:1px solid var(--border2);
  background:var(--surface2);color:var(--glow);font-size:12px;font-weight:600;cursor:pointer;white-space:nowrap;transition:background .12s,transform .12s;}
.tut-go:hover{background:var(--glow);color:#fff;transform:translateY(-1px);}
.tut-end{margin-top:26px;text-align:center;}
.tut-done{padding:11px 26px;border-radius:999px;border:none;background:var(--glow);color:#fff;
  font-size:14px;font-weight:700;cursor:pointer;transition:transform .12s;}
.tut-done:hover{transform:translateY(-1px);}
@media(max-width:600px){
  .tutorial-inner{padding:18px 13px 56px;}
  .tut-title{font-size:22px;}
  .tut-item{flex-direction:column;align-items:flex-start;gap:9px;}
  .tut-go{align-self:stretch;text-align:center;}
}