@import url('https://fonts.googleapis.com/css2?family=Lexend:wght@300;400;500;600;700;800;900&display=swap');

:root{
  --dark:#0F0F41;--dark2:#1a1a5e;
  --cyan:#19CCE9;--cyan2:#0fb8d4;--cyan-soft:rgba(25,204,233,.12);
  --yellow:#FFCF00;--yellow2:#e8bb00;--yellow-soft:rgba(255,207,0,.12);
  --bg:#f5f7fc;--bg2:#eef1f8;--bg3:#e6eaf5;
  --card:#ffffff;--card2:#f8faff;
  --border:#e4e9f2;--border2:#d4dced;
  --text:#0F0F41;--sub:#4a4a7a;--muted:#8888aa;--fog:#aaaacc;
  --green:#16c784;--green-soft:rgba(22,199,132,.12);
  --red:#ef4444;--red-soft:rgba(239,68,68,.10);
  --orange:#f97316;--purple:#7c3aed;
  --shadow:0 2px 16px rgba(15,15,65,.07);
  --shadow-lg:0 8px 40px rgba(15,15,65,.12);
  --shadow-cyan:0 4px 20px rgba(25,204,233,.25);
  --r:20px;--r-md:14px;--r-sm:10px;--r-pill:100px;
}
body.dark{
  --bg:#0d0d2b;--bg2:#12122e;--bg3:#16163a;--card:#1a1a40;--card2:#1e1e48;
  --border:#2a2a5e;--border2:#333370;--text:#e8e8ff;--sub:#a0a0cc;--muted:#7070aa;--fog:#5555aa;
}
body.dark .mimi-nav,body.dark .bnav{background:rgba(13,13,43,.97)!important;border-color:var(--border)}
body.dark .inp{background:var(--bg2);border-color:var(--border2);color:var(--text)}
body.dark .inp:focus{background:var(--bg3);border-color:var(--cyan)}
body.dark .sidebar{background:var(--card);border-color:var(--border)}
body.dark .card,body.dark .card-md,body.dark .card-sm{background:var(--card);border-color:var(--border)}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px;-webkit-tap-highlight-color:transparent;scroll-behavior:smooth}
body{font-family:'Lexend',sans-serif;background:var(--bg);color:var(--text);min-height:100vh;overflow-x:hidden}
button{cursor:pointer;font-family:inherit;border:none;outline:none}
input,select,textarea{font-family:inherit;outline:none;-webkit-appearance:none}
a{text-decoration:none;color:inherit}

/* ── NAV ── */
.mimi-nav{position:sticky;top:0;z-index:200;background:rgba(245,247,252,.97);backdrop-filter:blur(20px);border-bottom:1px solid var(--border);height:60px;display:flex;align-items:center;padding:0 16px}
.mimi-nav-inner{display:flex;align-items:center;gap:10px;width:100%;max-width:1000px;margin:0 auto}
.logo-mark{width:34px;height:34px;background:var(--dark);border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:900;color:var(--cyan);letter-spacing:-1px;flex-shrink:0}
.logo-name{font-size:16px;font-weight:800;color:var(--dark);letter-spacing:-.03em}.logo-name span{color:var(--cyan)}
.nav-center{flex:1;padding:0 8px;overflow:hidden}
.nav-title{font-size:15px;font-weight:700;color:var(--dark);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.nav-sub{font-size:11px;color:var(--muted);margin-top:1px}
.nav-right{display:flex;align-items:center;gap:8px;margin-left:auto;flex-shrink:0}
.btn-back{width:36px;height:36px;border-radius:var(--r-sm);background:var(--bg2);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;font-size:16px;color:var(--dark);cursor:pointer;flex-shrink:0;text-decoration:none;transition:.15s}
.btn-back:hover{border-color:var(--cyan);color:var(--cyan2)}
.dm-toggle{width:36px;height:36px;border-radius:var(--r-sm);background:var(--bg2);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;font-size:15px;cursor:pointer;color:var(--sub);transition:.15s;flex-shrink:0}
.streak-chip{display:flex;align-items:center;gap:5px;background:var(--cyan-soft);border:1px solid rgba(25,204,233,.25);border-radius:var(--r-pill);padding:5px 11px;font-size:12px;font-weight:700;color:var(--cyan2)}

/* ── STUDENT BOTTOM NAV ── */
.bnav{position:fixed;bottom:0;left:0;right:0;z-index:200;background:rgba(255,255,255,.97);backdrop-filter:blur(20px);border-top:1px solid var(--border);display:grid;grid-template-columns:repeat(4,1fr);padding-bottom:env(safe-area-inset-bottom,0)}
.bnav-btn{display:flex;flex-direction:column;align-items:center;padding:10px 4px 8px;gap:3px;background:none;border:none;color:var(--fog);cursor:pointer;transition:color .15s;font-family:inherit}
.bnav-btn.on{color:var(--dark)}.bnav-btn.on .bnav-icon{color:var(--cyan)}
.bnav-icon{font-size:20px;line-height:1}.bnav-lbl{font-size:10px;font-weight:600}

/* ── TEACHER LAYOUT ── */
.teacher-wrap{display:flex;min-height:calc(100vh - 60px);max-width:1000px;margin:0 auto}

/* Desktop sidebar */
.sidebar{width:210px;flex-shrink:0;background:var(--card);border-right:1px solid var(--border);padding:12px 8px;position:sticky;top:60px;height:calc(100vh - 60px);overflow-y:auto;transition:transform .3s}
.sidebar-brand{padding:8px 11px 4px;font-size:14px;font-weight:800;color:var(--dark);border-bottom:1px solid var(--border);margin-bottom:8px;padding-bottom:10px}
.sidebar a{display:flex;align-items:center;gap:9px;padding:10px 12px;color:var(--sub);border-radius:var(--r-sm);font-size:13px;font-weight:500;transition:.15s;margin-bottom:2px;text-decoration:none}
.sidebar a:hover,.sidebar a.on{color:var(--dark);background:var(--cyan-soft)}
.sidebar a.on{color:var(--cyan2);font-weight:700}
.sidebar a i{width:14px;text-align:center;flex-shrink:0}
.sidebar-sec{font-size:10px;color:var(--fog);text-transform:uppercase;letter-spacing:.07em;padding:10px 12px 4px;font-weight:700}

/* Teacher main area */
.main-area{flex:1;padding:24px;overflow-x:hidden;min-width:0}

/* Teacher mobile bottom nav */
.teacher-bnav{display:none;position:fixed;bottom:0;left:0;right:0;z-index:200;background:rgba(255,255,255,.97);backdrop-filter:blur(20px);border-top:1px solid var(--border);overflow-x:auto;white-space:nowrap;scrollbar-width:none;padding-bottom:env(safe-area-inset-bottom,0)}
.teacher-bnav::-webkit-scrollbar{display:none}
.teacher-bnav-inner{display:inline-flex;min-width:100%}
.teacher-bnav a{display:inline-flex;flex-direction:column;align-items:center;padding:10px 16px 8px;gap:3px;color:var(--fog);font-size:10px;font-weight:600;min-width:70px;flex-shrink:0;text-decoration:none;transition:color .15s}
.teacher-bnav a.on,.teacher-bnav a:hover{color:var(--cyan2)}
.teacher-bnav a i{font-size:18px}

@media(max-width:767px){
  .sidebar{display:none}
  .teacher-bnav{display:block}
  .main-area{padding:16px 14px 90px}
  .teacher-wrap{max-width:100%}
  .g4{grid-template-columns:1fr 1fr}
}
@media(min-width:768px){
  .teacher-bnav{display:none}
  .mimi-nav,.page-wrap,.page-wrap-nb{max-width:100%}
  .mimi-nav-inner{max-width:1000px}
  .page-wrap,.page-wrap-nb{max-width:1000px;margin-left:auto;margin-right:auto}
  .bnav{max-width:1000px;left:50%;transform:translateX(-50%);border-left:1px solid var(--border);border-right:1px solid var(--border)}
}

/* ── PAGE CONTENT ── */
.page-wrap{padding:20px 16px 100px}
.page-wrap-nb{padding:20px 16px 24px}
.page-title{font-size:20px;font-weight:800;margin-bottom:4px;letter-spacing:-.02em;color:var(--dark)}
.page-sub{font-size:13px;color:var(--muted);margin-bottom:20px}

/* ── HERO ── */
.hero{background:linear-gradient(145deg,#0F0F41 0%,#1a1a6e 60%,#0d3a6e 100%);position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;top:-40px;right:-40px;width:200px;height:200px;background:radial-gradient(circle,rgba(25,204,233,.2) 0%,transparent 70%);border-radius:50%;pointer-events:none}

/* ── CARDS ── */
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--r);padding:20px;box-shadow:var(--shadow)}
.card-md{background:var(--card);border:1px solid var(--border);border-radius:var(--r-md);padding:16px;box-shadow:var(--shadow)}
.card-sm{background:var(--bg2);border:1px solid var(--border);border-radius:var(--r-sm);padding:14px}
.card-dark{background:var(--dark);border-radius:var(--r);padding:20px;position:relative;overflow:hidden}
.card-dark::before{content:'';position:absolute;top:-40px;right:-40px;width:160px;height:160px;background:radial-gradient(circle,rgba(25,204,233,.18) 0%,transparent 70%);border-radius:50%}

/* ── BUTTONS ── */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 22px;border-radius:var(--r-pill);font-size:14px;font-weight:700;cursor:pointer;border:none;font-family:inherit;transition:all .2s;white-space:nowrap;line-height:1}
.btn:active{transform:scale(.96)}.btn:disabled{opacity:.45;cursor:not-allowed;transform:none}
.btn-primary{background:var(--dark);color:#fff!important}
.btn-primary:hover{background:var(--dark2)}
.btn-cyan{background:var(--cyan);color:var(--dark)!important;font-weight:800}
.btn-cyan:hover{background:var(--cyan2)}
.btn-yellow{background:var(--yellow);color:var(--dark)!important;font-weight:800}
.btn-green{background:var(--green);color:#fff!important}
.btn-ghost{background:var(--bg2);color:var(--sub);border:1px solid var(--border)}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan2)}
.btn-danger{background:var(--red-soft);color:var(--red);border:1px solid rgba(239,68,68,.3)}
.btn-block{width:100%}.btn-lg{padding:15px 28px;font-size:15px}
.btn-sm{padding:9px 16px;font-size:13px}.btn-xs{padding:6px 12px;font-size:12px}

/* ── INPUTS ── */
.inp{width:100%;background:var(--bg2);border:1.5px solid var(--border2);border-radius:var(--r-md);padding:13px 15px;color:var(--text);font-size:14px;font-weight:500;transition:all .2s;font-family:inherit}
.inp:focus{border-color:var(--cyan);box-shadow:0 0 0 3px rgba(25,204,233,.12);background:white}
.inp::placeholder{color:var(--fog);font-weight:400}
select.inp{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M5 6L0 0h10z' fill='%238888aa'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center;padding-right:38px;cursor:pointer}
textarea.inp{resize:vertical;min-height:90px}
.inp-label{font-size:12px;font-weight:700;color:var(--sub);margin-bottom:7px;letter-spacing:.04em;text-transform:uppercase;display:block}

/* ── BADGES ── */
.badge{display:inline-flex;align-items:center;gap:4px;padding:4px 10px;border-radius:var(--r-pill);font-size:11px;font-weight:700}
.b-cyan{background:var(--cyan-soft);color:var(--cyan2);border:1px solid rgba(25,204,233,.25)}
.b-yellow{background:var(--yellow-soft);color:#c9a000;border:1px solid rgba(255,207,0,.3)}
.b-green{background:var(--green-soft);color:#0ea56e;border:1px solid rgba(22,199,132,.25)}
.b-red{background:var(--red-soft);color:var(--red);border:1px solid rgba(239,68,68,.2)}
.b-dark{background:rgba(15,15,65,.08);color:var(--dark);border:1px solid rgba(15,15,65,.15)}
.b-purple{background:rgba(124,58,237,.1);color:var(--purple);border:1px solid rgba(124,58,237,.2)}
.b-gray{background:rgba(136,136,170,.1);color:var(--muted);border:1px solid rgba(136,136,170,.2)}

/* ── TYPOGRAPHY ── */
.h2{font-size:22px;font-weight:800;line-height:1.2;letter-spacing:-.02em}
.h4{font-size:11px;font-weight:800;text-transform:uppercase;letter-spacing:.08em;color:var(--muted)}
.sm{font-size:13px}.xs{font-size:11px}
.fog{color:var(--fog)}.muted{color:var(--muted)}.sub{color:var(--sub)}
.cy{color:var(--cyan2)}.gr{color:var(--green)}.yw{color:var(--yellow2)}.rd{color:var(--red)}
.center{text-align:center}.lh{line-height:1.7}.bold{font-weight:700}

/* ── SPACING ── */
.mb4{margin-bottom:4px}.mb6{margin-bottom:6px}.mb8{margin-bottom:8px}
.mb10{margin-bottom:10px}.mb12{margin-bottom:12px}.mb14{margin-bottom:14px}
.mb16{margin-bottom:16px}.mb20{margin-bottom:20px}.mb24{margin-bottom:24px}
.mt4{margin-top:4px}.mt8{margin-top:8px}.mt12{margin-top:12px}.mt16{margin-top:16px}.mt20{margin-top:20px}

/* ── FLEX/GRID ── */
.row{display:flex;align-items:center}.col{display:flex;flex-direction:column}
.between{justify-content:space-between}.f1{flex:1}.wrap{flex-wrap:wrap}
.g2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.g3{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.g4{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.gap4{gap:4px}.gap6{gap:6px}.gap8{gap:8px}.gap10{gap:10px}.gap12{gap:12px}

/* ── PROGRESS ── */
.prog{height:7px;background:var(--bg2);border-radius:var(--r-pill);overflow:hidden;border:1px solid var(--border)}
.prog-fill{height:100%;border-radius:var(--r-pill);background:linear-gradient(90deg,var(--cyan),var(--cyan2));transition:width .7s}

/* ── SPINNER ── */
.spin{width:20px;height:20px;border:2.5px solid var(--border2);border-top-color:var(--cyan);border-radius:50%;animation:sp .7s linear infinite;flex-shrink:0;display:inline-block}
@keyframes sp{to{transform:rotate(360deg)}}
@keyframes fadeUp{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
.fade-up{animation:fadeUp .3s ease}

/* ── SUBJECT CARD ── */
.subj-card{background:var(--card);border:1px solid var(--border);border-radius:var(--r-md);padding:18px;cursor:pointer;transition:all .2s;text-align:center;box-shadow:var(--shadow);display:block;color:var(--text)}
.subj-card:hover{border-color:var(--cyan);transform:translateY(-2px);box-shadow:var(--shadow-cyan)}
.subj-icon{width:52px;height:52px;border-radius:var(--r-sm);display:flex;align-items:center;justify-content:center;font-size:24px;margin:0 auto 10px}

/* ── CHAPTER ROW ── */
.ch-row{display:flex;align-items:center;gap:14px;padding:15px;background:var(--card);border:1px solid var(--border);border-radius:var(--r-md);cursor:pointer;transition:all .15s;margin-bottom:8px;box-shadow:var(--shadow);text-decoration:none;color:var(--text)}
.ch-row:hover{border-color:var(--cyan);box-shadow:var(--shadow-cyan)}
.ch-num{width:40px;height:40px;border-radius:12px;background:var(--bg2);border:1px solid var(--border2);display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:800;color:var(--sub);flex-shrink:0}
.ch-num.done{background:var(--green-soft);border-color:rgba(22,199,132,.3);color:var(--green)}
.ch-num.active{background:var(--cyan-soft);border-color:rgba(25,204,233,.3);color:var(--cyan2)}

/* ── STEP NAV ── */
.step-row{display:flex;overflow-x:auto;gap:8px;padding-bottom:8px;scrollbar-width:none;margin-bottom:16px}
.step-row::-webkit-scrollbar{display:none}
.step-btn{display:flex;flex-direction:column;align-items:center;gap:4px;min-width:68px;padding:10px 8px;border-radius:var(--r-sm);border:1.5px solid var(--border2);background:var(--card);cursor:pointer;transition:all .2s;flex-shrink:0;font-size:10px;font-weight:700;color:var(--muted);font-family:inherit}
.step-btn.active{border-color:var(--dark);background:var(--dark);color:white}
.step-btn.done{border-color:rgba(22,199,132,.4);background:var(--green-soft);color:var(--green)}
.step-btn.locked{opacity:.4;cursor:not-allowed}
.step-btn:hover:not(.locked):not(.active){border-color:var(--cyan);color:var(--cyan2)}
.s-icon{font-size:16px;height:18px;display:flex;align-items:center;justify-content:center}

/* ── QUIZ ── */
.qopt{display:flex;align-items:center;gap:12px;padding:14px 16px;background:var(--card);border:1.5px solid var(--border);border-radius:var(--r-md);cursor:pointer;text-align:left;width:100%;font-size:14px;font-weight:500;color:var(--text);transition:all .15s;margin-bottom:10px;font-family:inherit}
.qopt:hover:not(:disabled){border-color:var(--cyan);background:var(--cyan-soft)}
.qopt.correct{background:var(--green-soft);border-color:var(--green)}
.qopt.wrong{background:var(--red-soft);border-color:var(--red)}
.qdot{width:30px;height:30px;border-radius:50%;border:2px solid var(--border2);flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:800;color:var(--muted)}

/* ── FLASHCARD ── */

.fc-inner{position:relative;width:100%;height:100%;transform-style:preserve-3d;transition:transform .55s cubic-bezier(.4,0,.2,1)}
.fc-scene.flipped .fc-inner{transform:rotateY(180deg)}
.fc-front,.fc-back{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;border-radius:var(--r);display:flex;flex-direction:column;align-items:center;justify-content:center;padding:32px}
.fc-front{background:linear-gradient(145deg,#0F0F41,#1a1a6e);border:1px solid rgba(25,204,233,.2);text-align:center;color:#ffffff}
.fc-back{background:linear-gradient(145deg,#0a3d2e,#062a1f);border:1px solid rgba(22,199,132,.3);transform:rotateY(180deg);justify-content:flex-start;text-align:left;overflow-y:auto;align-items:flex-start;color:#ffffff}

/* ── STATS ── */
.stat{background:var(--card);border:1px solid var(--border);border-radius:var(--r-md);padding:16px;text-align:center;box-shadow:var(--shadow)}
.stat-val{font-size:26px;font-weight:800;line-height:1}
.stat-lbl{font-size:10px;color:var(--muted);font-weight:700;text-transform:uppercase;letter-spacing:.08em;margin-top:5px}

/* ── MISC ── */
.sec-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.sec-head h3{font-size:15px;font-weight:800;color:var(--dark)}
.t-action{display:flex;align-items:center;gap:14px;padding:16px;background:var(--card);border:1px solid var(--border);border-radius:var(--r-md);cursor:pointer;transition:all .2s;box-shadow:var(--shadow);margin-bottom:10px;text-decoration:none;color:var(--text)}
.t-action:hover{transform:translateX(3px);border-color:var(--cyan)}
.t-icon{width:46px;height:46px;border-radius:var(--r-sm);display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0}
.paywall{background:linear-gradient(135deg,rgba(25,204,233,.06),rgba(15,15,65,.03));border:1.5px solid rgba(25,204,233,.2);border-radius:var(--r);padding:24px;text-align:center}
.div{height:1px;background:var(--border);margin:16px 0}
.step-dots{display:flex;gap:6px;margin-bottom:16px}
.step-dot{height:4px;border-radius:var(--r-pill);flex:1;background:var(--border2);transition:background .3s}
.step-dot.done{background:var(--dark)}.step-dot.active{background:var(--cyan)}
.role-btn{padding:12px 6px;border-radius:var(--r-md);border:2px solid var(--border2);background:var(--bg2);color:var(--sub);font-family:inherit;font-size:11px;font-weight:700;cursor:pointer;transition:all .2s;display:flex;flex-direction:column;align-items:center;gap:6px}
.role-btn.sel{border-color:var(--dark);background:var(--dark);color:#fff}
.role-btn.sel .role-icon{background:rgba(255,255,255,.12)!important;color:var(--cyan)!important}
.role-icon{width:34px;height:34px;border-radius:10px;display:flex;align-items:center;justify-content:center}
.tbl-wrap{overflow-x:auto;border-radius:var(--r-md);border:1px solid var(--border)}
.tbl{width:100%;border-collapse:collapse}
.tbl th{padding:11px 14px;text-align:left;font-size:11px;font-weight:700;color:var(--muted);background:var(--bg2);border-bottom:1px solid var(--border);text-transform:uppercase;letter-spacing:.05em}
.tbl td{padding:12px 14px;font-size:13px;border-bottom:1px solid var(--border);color:var(--text);vertical-align:middle}
.tbl tr:last-child td{border-bottom:none}
.add-subject-btn{display:flex;align-items:center;gap:8px;background:var(--cyan-soft);border:1.5px dashed rgba(25,204,233,.4);border-radius:var(--r-md);padding:12px 14px;color:var(--cyan2);font-weight:600;font-size:13px;cursor:pointer;width:100%;transition:all .2s;font-family:inherit}
.qtype-btn{padding:10px 20px;border-radius:var(--r-pill);border:1.5px solid var(--border2);background:var(--bg2);color:var(--sub);font-family:inherit;font-size:13px;font-weight:700;cursor:pointer;transition:all .2s}
.qtype-btn.sel{background:var(--dark);border-color:var(--dark);color:white}

/* ── AUTH ── */
.auth-form-wrap{max-width:480px;margin:0 auto;width:100%;min-height:100vh;background:var(--bg);display:flex;flex-direction:column}
@media(min-width:768px){
  .auth-form-wrap{min-height:auto;border-radius:24px;overflow:hidden;box-shadow:var(--shadow-lg);margin:32px auto}
  body:has(.auth-form-wrap){background:var(--bg3);display:flex;justify-content:center;align-items:flex-start;padding:20px}
}

/* ── AI OUTPUT ── */
.ai-out{font-size:14px;line-height:1.8;color:var(--text)}
.ai-out h3{font-size:16px;font-weight:800;color:var(--dark);margin:18px 0 8px;border-bottom:1px solid var(--border);padding-bottom:6px}
.ai-out h4{font-size:14px;font-weight:700;color:var(--cyan2);margin:12px 0 6px}
.ai-out ul,.ai-out ol{padding-left:20px;margin:8px 0}.ai-out li{margin-bottom:6px}
.ai-out strong{color:var(--dark);font-weight:700}.ai-out p{margin-bottom:9px}
.formula-box{background:rgba(25,204,233,.1);border:1px solid rgba(25,204,233,.25);border-radius:var(--r-sm);padding:14px 18px;margin:14px 0;font-family:monospace;font-size:15px;color:var(--cyan2);text-align:center}

/* ── ALERTS ── */
.alert-box{padding:12px 16px;border-radius:var(--r-sm);margin-bottom:12px;font-size:14px;border-left:3px solid;line-height:1.6}
.alert-success{border-color:var(--green);background:var(--green-soft);color:#0a7a50}
.alert-error{border-color:var(--red);background:var(--red-soft);color:#c0392b}
.alert-info{border-color:var(--cyan);background:var(--cyan-soft);color:var(--cyan2)}

/* ── TOAST ── */
#mimi-toast{position:fixed;bottom:90px;left:50%;transform:translateX(-50%) translateY(16px);background:var(--dark);border-radius:var(--r-sm);padding:11px 20px;font-size:13px;font-weight:600;color:white;opacity:0;transition:all .28s;z-index:9999;pointer-events:none;white-space:nowrap;max-width:90vw;text-align:center;box-shadow:var(--shadow-lg)}
#mimi-toast.on{opacity:1;transform:translateX(-50%) translateY(0)}

::-webkit-scrollbar{width:3px;height:3px}
::-webkit-scrollbar-thumb{background:var(--border2);border-radius:99px}

/* ── FLASHCARD TEXT — always white regardless of mode ── */
.fc-prompt{font-size:11px;color:rgba(255,255,255,.5);margin-bottom:12px;font-weight:300;text-align:center;width:100%}
.fc-q{font-size:clamp(15px,3vw,20px);font-weight:700;color:#ffffff!important;line-height:1.5}
.fc-tag{display:inline-flex;align-items:center;padding:4px 10px;background:rgba(25,204,233,.18);border:1px solid rgba(25,204,233,.35);border-radius:var(--r-pill);font-size:11px;font-weight:700;color:#19CCE9;position:absolute;top:16px;right:16px}
.fc-a-label{font-size:11px;color:rgba(22,199,132,.85);font-weight:700;text-transform:uppercase;letter-spacing:.07em;margin-bottom:10px;margin-top:4px}
.fc-a{font-size:14px;line-height:1.75;color:rgba(255,255,255,.9)!important;white-space:pre-line;text-align:left;width:100%}
/* Reduced height for chapter flashcards page so card fits on screen */
.fc-scene{perspective:1200px;cursor:pointer;user-select:none;height:calc(100vh - 240px);min-height:320px;max-height:500px;margin-bottom:14px}