@import url("https://fonts.googleapis.com/css2?family=Archivo:wght@400;600;700;800;900&family=Poppins:ital,wght@0,300;0,400;0,500;0,600;1,400&display=swap");:root{--bg:#0e0c09;--bg-soft:#16130e;--card:#1c1812;--card-2:#241f16;--line:#3a321f;--gold:#e3b04b;--gold-2:#c99732;--gold-soft:rgba(227,176,75,.12);--cream:#f5efe3;--muted:#b3a78d;--body-text:#ded5c2;--grad-a:#f0c168;--grad-b:#c99732;--btn-text:#1a1505;--hero-a:#2a2210;--hero-b:#16130e;--green:#5fc97e;--red:#e36a5a;--radius:14px}html[data-theme=light]{--bg:#f0dfc8;--bg-soft:#e9d6ba;--card:#f8eedd;--card-2:#f2e4cc;--line:#d8c4a4;--gold:#795833;--gold-2:#5f4527;--gold-soft:rgba(121,88,51,.12);--cream:#112a46;--muted:#6e5c44;--body-text:#2a4263;--grad-a:#1d4068;--grad-b:#112a46;--btn-text:#f0dfc8;--hero-a:#e4cda9;--hero-b:#f0dfc8;--green:#2e7d4f;--red:#b54434}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--cream);font-family:Poppins,sans-serif;min-height:100vh}.display,h1,h2,h3{font-family:Archivo,sans-serif;font-weight:900;text-transform:uppercase;letter-spacing:.02em}a{color:var(--gold);text-decoration:none}.container{max-width:1100px;margin:0 auto;padding:24px}.badge{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--gold);border-radius:999px;padding:8px 18px;color:var(--gold);font-size:12px;font-weight:600;letter-spacing:.18em;text-transform:uppercase}.gold-text{background:linear-gradient(180deg,var(--grad-a),var(--grad-b));-webkit-background-clip:text;background-clip:text;color:transparent}.btn{display:inline-block;border:none;cursor:pointer;font-family:Archivo,sans-serif;font-weight:800;text-transform:uppercase;letter-spacing:.08em;border-radius:999px;padding:14px 32px;font-size:14px;background:linear-gradient(180deg,var(--grad-a),var(--grad-b));color:var(--btn-text);transition:transform .12s,opacity .12s}.btn:hover{transform:translateY(-1px)}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}.btn-ghost{background:transparent;border:1px solid var(--line);color:var(--muted)}.btn-ghost:hover{border-color:var(--gold);color:var(--gold)}.btn-sm{padding:9px 18px;font-size:12px}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:28px}input[type=number],input[type=password],input[type=text],select{width:100%;background:var(--bg-soft);border:1px solid var(--line);border-radius:10px;color:var(--cream);padding:13px 16px;font-family:Poppins,sans-serif;font-size:15px;outline:none}input:focus,select:focus{border-color:var(--gold)}label{display:block;font-size:13px;color:var(--muted);margin:16px 0 6px}.error{color:var(--red);font-size:14px;margin-top:12px}.muted{color:var(--muted)}.option{display:block;width:100%;text-align:left;background:var(--bg-soft);border:1px solid var(--line);border-radius:12px;color:var(--cream);padding:15px 18px;font-family:Poppins,sans-serif;font-size:15px;cursor:pointer;margin-bottom:10px;transition:border-color .12s,background .12s}.option.selected,.option:hover:not(:disabled){border-color:var(--gold)}.option.selected{background:var(--gold-soft)}.option.correct{border-color:var(--green);background:rgba(95,201,126,.12)}.option.wrong{border-color:var(--red);background:hsla(7,71%,62%,.1)}.option:disabled{cursor:default}.dialog-backdrop{position:fixed;inset:0;background:rgba(0,0,0,.7);display:flex;align-items:center;justify-content:center;z-index:50;padding:20px}.dialog{background:var(--card);border:1px solid var(--gold-2);border-radius:var(--radius);width:100%;max-width:640px;max-height:80vh;display:flex;flex-direction:column}.chat-scroll{flex:1 1;overflow-y:auto;padding:20px}.msg{margin-bottom:14px;max-width:90%;line-height:1.55;font-size:14.5px;white-space:pre-wrap}.msg.ai{white-space:normal}.msg.user{margin-left:auto;background:var(--gold-soft);border:1px solid var(--gold-2);border-radius:12px 12px 2px 12px;padding:10px 14px}.msg.ai{background:var(--bg-soft);border:1px solid var(--line);border-radius:12px 12px 12px 2px;padding:10px 14px}.study-wrap{display:flex;min-height:calc(100vh - 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