:root{
  --bg:#f7f6f3;--card:#fff;--text:#111;--muted:#777;
  --line:#e6e3de;--accent:#7047ff;--accent2:#8b6cff;
}
*{box-sizing:border-box}
html,body{margin:0;min-height:100%;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--text);background:radial-gradient(circle at 80% 10%,#e9ddff 0,rgba(233,221,255,.7) 20%,transparent 45%),var(--bg)}
button,input{font:inherit}
button{cursor:pointer}
.shell{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px}
.auth{width:min(460px,100%);background:rgba(255,255,255,.94);border:1px solid rgba(255,255,255,.9);border-radius:30px;padding:46px 42px 40px;box-shadow:0 24px 70px rgba(40,30,70,.09)}
.logo{font-weight:900;font-size:29px;letter-spacing:-1.7px;margin-bottom:48px}.logo i{color:var(--accent);font-style:normal}
.kicker{font-size:12px;letter-spacing:2px;text-transform:uppercase;color:#8a8580;font-weight:800;margin-bottom:13px}
h1{font-size:40px;line-height:1.08;letter-spacing:-2.4px;margin:0 0 18px;max-width:370px}
.sub{font-size:17px;line-height:1.5;color:#74716e;margin:0 0 26px}
.field{width:100%;height:52px;border:1px solid #ddd9d2;border-radius:14px;background:#fff;padding:0 15px;margin:6px 0;outline:none;transition:.2s}
.field:focus{border-color:#b7a9ff;box-shadow:0 0 0 4px rgba(112,71,255,.09)}
.primary{width:100%;height:52px;border:0;border-radius:14px;background:#111;color:#fff;font-weight:800;margin-top:12px;transition:.2s}
.primary:hover{transform:translateY(-1px);background:#1d1d1d}
.switch{border:0;background:none;color:#666;margin-top:14px;width:100%;padding:8px}
.err{background:#fff0f0;color:#d33b3b;border-radius:11px;padding:11px 12px;font-size:13px;margin-top:8px}
.demo{margin-top:18px;text-align:center;color:#aaa;font-size:12px}

.app{min-height:100vh;padding:22px}
.nav{max-width:1200px;margin:auto;display:flex;align-items:center;justify-content:space-between;padding:8px 4px 24px}
.nav .logo{margin:0;font-size:25px}.nav-actions{display:flex;gap:8px}
.ghost{border:1px solid var(--line);background:rgba(255,255,255,.7);border-radius:12px;padding:10px 14px}
.main{max-width:1200px;margin:auto}
.hero{display:grid;grid-template-columns:1.4fr .8fr;gap:18px}
.card{background:rgba(255,255,255,.88);border:1px solid rgba(225,221,215,.95);border-radius:26px;padding:30px;box-shadow:0 15px 45px rgba(40,30,70,.05)}
.hero h2{font-size:46px;line-height:1.02;letter-spacing:-3px;margin:0 0 15px}.hero p{color:var(--muted);font-size:17px;line-height:1.5}
.purple{background:linear-gradient(145deg,#7652ff,#b19aff);color:#fff;border:0}.purple p{color:#eee}
.stat{font-size:42px;font-weight:900;letter-spacing:-2px}.small{color:var(--muted);font-size:13px}
.section-title{font-size:20px;font-weight:850;margin:28px 0 12px}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.friend{display:flex;align-items:center;gap:13px}.avatar{width:46px;height:46px;border-radius:15px;display:grid;place-items:center;background:#eee8ff;color:#6944ed;font-weight:900}
.q{margin-top:14px}.q h3{font-size:25px;letter-spacing:-1px;margin:0 0 18px}
.options{display:grid;grid-template-columns:1fr 1fr;gap:10px}.option{border:1px solid var(--line);background:#fff;border-radius:15px;padding:15px;text-align:left}.option.selected{border-color:var(--accent);background:#f3efff}
.lock{margin-top:14px}
.reveal{margin-top:16px;padding:16px;border-radius:16px;background:#f4f0ff}.reveal b{color:#5d38d8}
.badge{display:inline-flex;padding:7px 10px;border-radius:999px;background:#f1eeea;font-size:12px;font-weight:800;margin:4px}
@media(max-width:800px){
 .shell{padding:14px}.auth{padding:34px 24px 30px;border-radius:26px}.logo{margin-bottom:38px}
 h1{font-size:36px}.hero{grid-template-columns:1fr}.grid{grid-template-columns:1fr}
 .app{padding:12px}.card{padding:22px}.hero h2{font-size:38px}.options{grid-template-columns:1fr}
}