/* DARAPET welcome and voice setup */
.ait-welcome-mark{width:54px;height:54px;margin:0 auto 12px;border-radius:18px;display:grid;place-items:center;color:#dffcff;font-size:1.7rem;background:radial-gradient(circle,#22d3ee 0%,#6366f1 45%,#111827 75%);box-shadow:0 0 18px #22d3ee,0 0 48px rgba(99,102,241,.75);animation:ait-pulse 2.4s ease-in-out infinite}
.ait-welcome-line{text-align:center;color:#a5f3fc;font-weight:800;letter-spacing:.02em;text-shadow:0 0 14px rgba(34,211,238,.65)}
.ait-card#ait-s0{border-color:rgba(34,211,238,.38);box-shadow:0 0 24px rgba(34,211,238,.12),0 18px 55px rgba(15,23,42,.35)}
.ait-voice-choice{display:flex;gap:8px;flex-wrap:wrap;margin:14px 0 4px}
.ait-voice-choice .ait-input{flex:1 1 180px}
.ait-voice{position:relative}
.ait-voice:before{content:attr(data-number);display:grid;place-items:center;width:25px;height:25px;border-radius:50%;background:rgba(34,211,238,.14);color:#67e8f9;font-weight:800;position:absolute;left:10px;top:10px}
.ait-voice b,.ait-voice span,.ait-voice .play{margin-left:32px}
@keyframes ait-pulse{0%,100%{transform:scale(1);filter:brightness(1)}50%{transform:scale(1.07);filter:brightness(1.3)}}
/* DaraQuiz — AI Teacher Pro (voice classroom) */
*{margin:0;padding:0;box-sizing:border-box}
:root{
  --bg:#07080f;--surface:rgba(255,255,255,.04);--border:rgba(255,255,255,.08);
  --text:#e6ebf5;--muted:#7c879c;--accent:#6366f1;--accent2:#8b5cf6;--teal:#14b8a6;
  --green:#22c55e;--red:#ef4444;--gold:#f59e0b;
}
body{font-family:'Inter',system-ui,sans-serif;background:var(--bg);color:var(--text);min-height:100vh;overflow-x:hidden}
body::before{content:'';position:fixed;inset:0;pointer-events:none;
  background:radial-gradient(60% 40% at 50% 0%,rgba(99,102,241,.16),transparent 70%),
             radial-gradient(50% 40% at 90% 100%,rgba(20,184,166,.10),transparent 70%);}
a{color:inherit;text-decoration:none}
.ait-hdr{position:sticky;top:0;z-index:60;display:flex;align-items:center;gap:12px;
  padding:calc(12px + env(safe-area-inset-top)) 18px 12px;background:rgba(10,11,20,.72);
  backdrop-filter:blur(14px);border-bottom:1px solid var(--border)}
.ait-logo{font-weight:900;font-size:1rem;background:linear-gradient(135deg,#6366f1,#8b5cf6,#22d3ee);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.ait-hdr .sp{flex:1}
.ait-btn{border:1px solid var(--border);background:rgba(255,255,255,.04);color:var(--text);
  font:600 .82rem/1 'Inter',sans-serif;padding:9px 14px;border-radius:11px;cursor:pointer;transition:.18s}
.ait-btn:hover{border-color:rgba(255,255,255,.2);background:rgba(255,255,255,.08)}
.ait-btn.primary{background:linear-gradient(135deg,var(--accent),var(--accent2));border-color:transparent;color:#fff}
.ait-btn.primary:hover{filter:brightness(1.1)}
.ait-btn.ghost{background:none}
.ait-btn:disabled{opacity:.45;cursor:not-allowed}

/* ORB */
.ait-orb-wrap{display:flex;justify-content:center;padding:26px 0 10px}
.ait-orb{position:relative;width:170px;height:170px;border-radius:50%;
  background:radial-gradient(circle at 35% 30%,#a5b4fc,#6366f1 45%,#4c1d95 75%,#0b0b1a 100%);
  box-shadow:0 0 60px rgba(99,102,241,.45),inset 0 0 40px rgba(255,255,255,.18);
  transition:box-shadow .3s,transform .3s}
.ait-orb::after{content:'';position:absolute;inset:-16px;border-radius:50%;
  border:1px solid rgba(139,92,246,.35);animation:aitSpin 9s linear infinite}
.ait-orb::before{content:'';position:absolute;inset:-32px;border-radius:50%;
  border:1px dashed rgba(34,211,238,.22);animation:aitSpin 16s linear reverse infinite}
@keyframes aitSpin{to{transform:rotate(360deg)}}
@keyframes aitPulse{0%,100%{transform:scale(1)}50%{transform:scale(1.06)}}
@keyframes aitBreathe{0%,100%{box-shadow:0 0 40px rgba(99,102,241,.35),inset 0 0 34px rgba(255,255,255,.15)}
  50%{box-shadow:0 0 90px rgba(139,92,246,.75),inset 0 0 46px rgba(255,255,255,.28)}}
.ait-orb.speaking{animation:aitPulse 1.1s ease-in-out infinite,aitBreathe 1.6s ease-in-out infinite}
.ait-orb.listening{background:radial-gradient(circle at 35% 30%,#5eead4,#14b8a6 45%,#0f766e 75%,#04121a 100%);
  box-shadow:0 0 70px rgba(20,184,166,.6),inset 0 0 40px rgba(255,255,255,.2);animation:aitPulse .8s ease-in-out infinite}
.ait-orb.thinking{animation:aitBreathe 1s ease-in-out infinite}
.ait-orb-state{text-align:center;margin-top:14px;font-size:.8rem;font-weight:700;color:var(--muted);letter-spacing:.4px;text-transform:uppercase}

/* ONBOARDING */
.ait-shell{max-width:820px;margin:0 auto;padding:0 18px 40px}
.ait-card{background:var(--surface);border:1px solid var(--border);border-radius:20px;padding:22px;margin-top:18px;
  backdrop-filter:blur(8px);animation:aitFade .35s ease both}
@keyframes aitFade{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}
.ait-title{font-size:1.15rem;font-weight:800;margin-bottom:6px}
.ait-sub{font-size:.85rem;color:var(--muted);line-height:1.6}
.ait-label{display:block;font-size:.75rem;font-weight:700;color:var(--muted);margin:16px 0 7px;text-transform:uppercase;letter-spacing:.5px}
.ait-input{width:100%;padding:13px 15px;border-radius:13px;border:1px solid var(--border);
  background:rgba(255,255,255,.04);color:var(--text);font:500 .92rem 'Inter',sans-serif;outline:none}
.ait-input:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(99,102,241,.18)}
.ait-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}
.ait-voices{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:10px;max-height:320px;overflow:auto}
.ait-voice{border:1px solid var(--border);background:rgba(255,255,255,.03);border-radius:14px;padding:12px;cursor:pointer;transition:.16s}
.ait-voice:hover{border-color:rgba(139,92,246,.5);transform:translateY(-2px)}
.ait-voice.sel{border-color:var(--accent);background:rgba(99,102,241,.14)}
.ait-voice b{display:block;font-size:.85rem;font-weight:700}
.ait-voice span{font-size:.7rem;color:var(--muted)}
.ait-voice .play{margin-top:8px;font-size:.7rem;font-weight:700;color:var(--teal)}
.ait-range{width:100%;accent-color:var(--accent)}
.ait-rate-val{font-weight:800;color:var(--accent2)}

/* CLASSROOM */
.ait-room{display:grid;grid-template-columns:1.35fr .95fr;gap:14px;max-width:1320px;margin:0 auto;padding:14px 16px 130px}
.ait-panel{background:var(--surface);border:1px solid var(--border);border-radius:18px;overflow:hidden;display:flex;flex-direction:column}
.ait-panel-hd{display:flex;align-items:center;gap:8px;padding:11px 15px;border-bottom:1px solid var(--border);
  font-size:.76rem;font-weight:800;color:var(--muted);text-transform:uppercase;letter-spacing:.6px}
.ait-board{min-height:52vh;max-height:66vh;overflow:auto;padding:18px;font-size:.95rem;line-height:1.75}
.ait-board .step{border-left:3px solid var(--accent);padding:8px 0 8px 12px;margin:10px 0;background:rgba(99,102,241,.05);border-radius:0 10px 10px 0}
.ait-board .step-n{font-size:.68rem;font-weight:800;color:var(--accent2);text-transform:uppercase;letter-spacing:.7px}
.ait-board .note{background:rgba(245,158,11,.10);border:1px solid rgba(245,158,11,.3);color:#fcd34d;border-radius:12px;padding:11px 13px;margin:10px 0;font-size:.88rem}
.ait-board h3{font-size:1rem;margin:14px 0 6px;color:#c7d2fe}
.ait-board .mathline{overflow-x:auto;padding:6px 0}
.ait-board .bar{display:flex;align-items:center;gap:8px;margin:6px 0;font-size:.8rem}
.ait-board .bar i{height:12px;border-radius:6px;background:linear-gradient(90deg,var(--accent),var(--accent2));display:block}
.ait-board .empty{color:var(--muted);text-align:center;padding:40px 10px;font-size:.85rem}
.ait-transcript{min-height:52vh;max-height:66vh;overflow:auto;padding:14px;display:flex;flex-direction:column;gap:10px}
.ait-msg{border-radius:14px;padding:11px 13px;font-size:.88rem;line-height:1.65;max-width:96%;animation:aitFade .25s ease both}
.ait-msg.ai{background:rgba(99,102,241,.10);border:1px solid rgba(99,102,241,.24)}
.ait-msg.me{background:rgba(20,184,166,.10);border:1px solid rgba(20,184,166,.26);align-self:flex-end}
.ait-msg .who{font-size:.65rem;font-weight:800;text-transform:uppercase;letter-spacing:.6px;color:var(--muted);margin-bottom:4px}
.ait-msg.interim{opacity:.6;font-style:italic}

/* DOCK */
.ait-dock{position:fixed;left:0;right:0;bottom:0;z-index:70;padding:10px 14px calc(12px + env(safe-area-inset-bottom));
  background:rgba(8,9,17,.9);backdrop-filter:blur(16px);border-top:1px solid var(--border)}
.ait-dock-in{max-width:1320px;margin:0 auto;display:flex;align-items:center;gap:9px}
.ait-mic{width:52px;height:52px;flex-shrink:0;border-radius:50%;border:none;cursor:pointer;font-size:1.25rem;color:#fff;
  background:linear-gradient(135deg,var(--accent),var(--accent2));box-shadow:0 6px 22px rgba(99,102,241,.4);transition:.2s}
.ait-mic.on{background:linear-gradient(135deg,#14b8a6,#0ea5e9);animation:aitPulse .9s ease-in-out infinite}
.ait-dock input{flex:1;min-width:0;padding:13px 15px;border-radius:14px;border:1px solid var(--border);
  background:rgba(255,255,255,.05);color:var(--text);font:500 .9rem 'Inter',sans-serif;outline:none}
.ait-dock input:focus{border-color:var(--accent)}
.ait-mini{width:44px;height:44px;flex-shrink:0;border-radius:12px;border:1px solid var(--border);
  background:rgba(255,255,255,.04);color:var(--text);cursor:pointer;font-size:1rem;transition:.18s}
.ait-mini:hover{background:rgba(255,255,255,.1)}
.ait-mini.active{border-color:var(--gold);color:var(--gold)}
.ait-hint{max-width:1320px;margin:6px auto 0;font-size:.68rem;color:var(--muted);text-align:center}
.hidden{display:none!important}

@media(max-width:900px){
  .ait-room{grid-template-columns:1fr;padding-bottom:150px}
  .ait-board,.ait-transcript{min-height:34vh;max-height:44vh}
  .ait-orb{width:132px;height:132px}
}

/* layout polish */
.ait-panel-hd>span:first-child{flex:1;min-width:0}
.ait-mini.wide{width:auto;height:32px;padding:0 12px;font-size:.7rem;font-weight:800;letter-spacing:.5px}
.ait-dock .ait-btn{flex-shrink:0}
.ait-room{padding-bottom:120px}
@media(max-width:520px){
  .ait-dock-in{gap:7px}
  .ait-mic{width:46px;height:46px}
  .ait-dock .ait-btn{padding:11px 13px}
}

/* ChatGPT-style voice-first welcome: the orb is the only visual focus. */
body.ait-welcome-mode{overflow:hidden}
body.ait-welcome-mode .ait-hdr{display:none}
body.ait-welcome-mode .ait-shell{max-width:none;padding:0}
body.ait-welcome-mode .ait-orb-wrap{position:fixed;inset:0;z-index:20;padding:0;display:flex;align-items:center;justify-content:center;cursor:pointer}
body.ait-welcome-mode .ait-orb{width:238px;height:238px;box-shadow:0 0 55px rgba(99,102,241,.7),0 0 150px rgba(34,211,238,.28),inset 0 0 55px rgba(255,255,255,.22)}
body.ait-welcome-mode .ait-orb-state{display:none}
body.ait-welcome-mode #ait-s0{height:0;margin:0;padding:0;border:0;background:none;box-shadow:none;overflow:visible}
body.ait-welcome-mode #ait-s0>*{display:none}
.ait-orb-wrap{display:flex;flex-direction:column;align-items:center;justify-content:center}
.ait-orb-state{margin-top:18px}