:root{
  --bg:#07111f;--panel:#0f1c2e;--panel2:#14243a;--line:#26364f;--text:#f8fafc;
  --muted:#a5b4c7;--accent:#7c3aed;--accent2:#22d3ee;--good:#22c55e;--warn:#f59e0b;--bad:#ef4444;
  --radius:22px;--shadow:0 18px 55px rgba(0,0,0,.28)
}
*{box-sizing:border-box} body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Arial;background:
radial-gradient(circle at 10% 0%,rgba(124,58,237,.24),transparent 28%),
radial-gradient(circle at 90% 10%,rgba(34,211,238,.14),transparent 22%),var(--bg);color:var(--text);min-height:100vh}
button,input{font:inherit} button{cursor:pointer}
.shell{max-width:1100px;margin:0 auto;padding:18px 16px 100px}
.topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:18px}
.brand{display:flex;align-items:center;gap:10px;font-weight:850}.brand-badge{width:40px;height:40px;border-radius:13px;background:linear-gradient(145deg,var(--accent),var(--accent2));display:grid;place-items:center;box-shadow:var(--shadow)}
.muted{color:var(--muted)}.small{font-size:.86rem}.hidden{display:none!important}
.card{background:linear-gradient(180deg,rgba(20,36,58,.96),rgba(15,28,46,.96));border:1px solid var(--line);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow)}
.grid{display:grid;gap:14px}.grid2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid3{grid-template-columns:repeat(3,minmax(0,1fr))}
.hero{display:grid;grid-template-columns:1.15fr .85fr;gap:18px;align-items:center}
h1,h2,h3,p{margin-top:0}.headline{font-size:clamp(2rem,5vw,4.2rem);line-height:.95;letter-spacing:-.045em;margin-bottom:14px}
.gradient{background:linear-gradient(90deg,#c4b5fd,#67e8f9);-webkit-background-clip:text;background-clip:text;color:transparent}
.btn{border:0;border-radius:15px;padding:13px 16px;font-weight:800;color:white;background:#24334b;transition:.18s transform,.18s filter;display:inline-flex;align-items:center;justify-content:center;gap:8px}
.btn:hover{transform:translateY(-1px);filter:brightness(1.1)}.btn.primary{background:linear-gradient(135deg,var(--accent),#5b21b6)}.btn.good{background:linear-gradient(135deg,#16a34a,#15803d)}.btn.ghost{background:transparent;border:1px solid var(--line)}
.btn.full{width:100%}.btn.big{padding:16px 20px;font-size:1.04rem}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.stat{padding:14px;border-radius:18px;background:rgba(255,255,255,.035);border:1px solid var(--line)}.stat strong{display:block;font-size:1.35rem}
.mode{min-height:145px;position:relative;overflow:hidden}.mode .emoji{font-size:2rem}.mode:hover{border-color:#4f46e5}
.progress{height:10px;background:#1e293b;border-radius:999px;overflow:hidden}.progress>span{display:block;height:100%;background:linear-gradient(90deg,var(--accent),var(--accent2));width:0%}
.pill{display:inline-flex;align-items:center;gap:6px;padding:7px 10px;border-radius:999px;background:#17253a;border:1px solid var(--line);font-size:.84rem;color:#cbd5e1}
.avatar-wrap{display:grid;place-items:center;min-height:300px}
.avatar{width:190px;height:190px;position:relative;display:grid;place-items:center;filter:drop-shadow(0 24px 32px rgba(0,0,0,.32))}
.bot-head{width:132px;height:108px;border-radius:46% 46% 40% 40%;background:linear-gradient(145deg,#f8fafc,#cbd5e1);position:relative;display:grid;place-items:center;animation:float 3.3s ease-in-out infinite}
.bot-screen{width:98px;height:58px;background:#06101c;border-radius:26px;display:flex;justify-content:center;align-items:center;gap:18px;box-shadow:inset 0 0 22px rgba(34,211,238,.2)}
.eye{width:12px;height:18px;border-radius:10px;background:#67e8f9;box-shadow:0 0 14px #22d3ee}.bot-ear{position:absolute;width:24px;height:38px;border-radius:12px;background:#94a3b8;top:34px}.bot-ear.left{left:-13px}.bot-ear.right{right:-13px}
.bot-body{position:absolute;top:127px;width:108px;height:74px;border-radius:32px 32px 18px 18px;background:linear-gradient(145deg,#7c3aed,#312e81);z-index:-1}
.bot-core{position:absolute;top:151px;width:27px;height:27px;border-radius:50%;background:#67e8f9;box-shadow:0 0 22px #22d3ee}
.avatar.listening .eye{animation:pulse .65s infinite}.avatar.thinking .bot-head{animation:tilt .8s ease-in-out infinite alternate}.avatar.success .bot-core{background:#4ade80;box-shadow:0 0 28px #22c55e}.avatar.error .bot-core{background:#f87171;box-shadow:0 0 28px #ef4444}
.bubble{margin-top:8px;background:#0b1726;border:1px solid var(--line);padding:14px 16px;border-radius:18px;max-width:380px;line-height:1.45;min-height:72px}
@keyframes float{50%{transform:translateY(-9px) rotate(1deg)}} @keyframes pulse{50%{transform:scaleY(.35);opacity:.6}} @keyframes tilt{from{transform:rotate(-4deg)}to{transform:rotate(4deg)}}
.auth{max-width:480px;margin:7vh auto}.field{display:grid;gap:7px;margin-bottom:12px}.field input{width:100%;padding:14px 15px;border-radius:14px;border:1px solid var(--line);background:#0b1726;color:white;outline:none}.field input:focus{border-color:#7c3aed}
.quiz-layout{display:grid;grid-template-columns:1fr 330px;gap:16px}.question{font-size:clamp(1.25rem,3vw,2rem);line-height:1.2;margin:12px 0 18px}.options{display:grid;gap:10px}.option{width:100%;text-align:left;padding:14px;border-radius:15px;border:1px solid var(--line);background:#0b1726;color:white}.option:hover{border-color:#7c3aed}.option.correct{border-color:var(--good);background:rgba(34,197,94,.12)}.option.wrong{border-color:var(--bad);background:rgba(239,68,68,.12)}
.voicebar{display:flex;gap:9px;margin-top:14px}.mic{width:58px;height:58px;border-radius:50%;font-size:1.4rem}.transcript{flex:1;min-height:58px;border:1px dashed #36506f;border-radius:15px;padding:12px;color:#dbeafe;background:#0a1524}
.result{margin-top:14px;padding:14px;border-radius:15px;background:#0b1726;border:1px solid var(--line)}
.toast{position:fixed;left:50%;bottom:84px;transform:translateX(-50%);background:#111827;border:1px solid var(--line);padding:12px 16px;border-radius:999px;box-shadow:var(--shadow);z-index:30}
.bottom-nav{position:fixed;left:50%;transform:translateX(-50%);bottom:12px;width:min(680px,calc(100% - 24px));background:rgba(8,18,31,.92);backdrop-filter:blur(18px);border:1px solid var(--line);border-radius:20px;padding:8px;display:grid;grid-template-columns:repeat(4,1fr);z-index:20}
.navbtn{background:transparent;color:#cbd5e1;border:0;padding:9px;border-radius:13px}.navbtn.active{background:#1d2d46;color:white}
.confetti{position:fixed;inset:0;pointer-events:none;overflow:hidden;z-index:50}.confetti i{position:absolute;top:-10px;width:9px;height:16px;background:white;animation:fall 1.4s linear forwards}@keyframes fall{to{transform:translateY(105vh) rotate(600deg);opacity:.1}}
.admin-table{display:grid;gap:8px}.qrow{padding:12px;border-radius:14px;background:#0b1726;border:1px solid var(--line)}
.switch{display:inline-flex;align-items:center;gap:8px}
@media(max-width:820px){.hero,.quiz-layout{grid-template-columns:1fr}.grid3{grid-template-columns:1fr 1fr}.avatar-wrap{min-height:245px}.avatar{transform:scale(.85)}}
@media(max-width:560px){.grid2,.grid3{grid-template-columns:1fr}.shell{padding-inline:12px}.card{padding:15px}.headline{font-size:2.5rem}.topbar .hide-mobile{display:none}}