:root{--bg:#ffffff;--fg:#1a1a1a;--muted:#666;--card:#f7f9fc;--border:#e3e6ec;--primary:#0d6efd;--primary-2:#0b5ed7;--accent:#fd7e14;--success:#198754;--danger:#dc3545;--radius:14px;--shadow:0 4px 18px rgba(0,0,0,.06);}
[data-theme="dark"]{--bg:#0f1115;--fg:#eaeaea;--muted:#a0a4ad;--card:#181b22;--border:#262a33;--primary:#3d8bfd;--primary-2:#74a8ff;--shadow:0 4px 18px rgba(0,0,0,.4);}
*{box-sizing:border-box}html,body{margin:0;padding:0}body{font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--fg);line-height:1.6}
a{color:var(--primary);text-decoration:none}a:hover{color:var(--primary-2)}
.container{max-width:1180px;margin:0 auto;padding:0 18px}
.site-header{position:sticky;top:0;z-index:50;background:var(--bg);border-bottom:1px solid var(--border)}
.site-header .nav{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:12px 18px}
.logo{font-weight:800;font-size:1.25rem;color:var(--fg)}
.main-nav{display:flex;gap:14px}
.main-nav a{color:var(--fg);font-weight:500}
.actions{display:flex;gap:8px;align-items:center}
.btn-icon{background:transparent;border:1px solid var(--border);color:var(--fg);padding:6px 10px;border-radius:8px;cursor:pointer;font-size:.9rem}
.mobile-only{display:none}
@media(max-width:840px){.main-nav{display:none;position:absolute;top:60px;left:0;right:0;background:var(--bg);flex-direction:column;padding:14px;border-bottom:1px solid var(--border)}.main-nav.open{display:flex}.mobile-only{display:inline-block}}
.hero{padding:60px 0 30px;background:linear-gradient(135deg,rgba(13,110,253,.07),rgba(253,126,20,.05));text-align:center}
.hero h1{font-size:clamp(1.6rem,4vw,2.6rem);margin:0 0 8px}
.hero p{color:var(--muted);margin:0 0 22px}
.search-bar{display:flex;gap:8px;max-width:680px;margin:0 auto 18px;background:var(--card);border:1px solid var(--border);padding:6px;border-radius:999px;box-shadow:var(--shadow)}
.search-bar input{flex:1;border:0;outline:none;background:transparent;color:var(--fg);padding:10px 14px;font-size:1rem}
.search-bar button{border:0;background:var(--primary);color:#fff;padding:10px 20px;border-radius:999px;cursor:pointer;font-weight:600}
.cta-row{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-block;padding:10px 18px;border-radius:10px;font-weight:600;border:1px solid transparent}
.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-2);color:#fff}
.btn-outline{border-color:var(--border);color:var(--fg);background:var(--card)}
.section{padding:36px 0}
.section h2{font-size:1.4rem;margin:0 0 16px}
.grid{display:grid;gap:14px}
.grid-cards{grid-template-columns:repeat(auto-fill,minmax(190px,1fr))}
.grid-cards.small{grid-template-columns:repeat(auto-fill,minmax(150px,1fr))}
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:18px;display:flex;flex-direction:column;align-items:flex-start;gap:8px;color:var(--fg);transition:transform .15s,box-shadow .15s}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow);color:var(--fg)}
.card .icon{font-size:1.6rem}
.card h3{margin:0;font-size:1.05rem}
.tag-cloud{display:flex;flex-wrap:wrap;gap:8px}
.tag-cloud a{background:var(--card);border:1px solid var(--border);padding:8px 14px;border-radius:999px;color:var(--fg);font-size:.92rem}
.state-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:8px}
.state-grid a{background:var(--card);border:1px solid var(--border);padding:10px 14px;border-radius:10px;color:var(--fg);text-align:center}
.question-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}
.question-card h3{margin:0 0 12px;font-size:1.15rem}
.options{padding-left:22px;margin:8px 0}
.options li{padding:6px 8px;border-radius:6px;cursor:pointer}
.options li:hover{background:rgba(13,110,253,.08)}
.options li.correct{background:rgba(25,135,84,.12);color:var(--success);font-weight:600}
.options li.wrong{background:rgba(220,53,69,.12);color:var(--danger)}
.answer{color:var(--success);margin:10px 0 4px;font-weight:600}
.explain{color:var(--muted);margin:0 0 10px}
.meta{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-top:10px;font-size:.85rem}
.tag{background:rgba(13,110,253,.1);color:var(--primary);padding:3px 9px;border-radius:999px}
.level{background:rgba(253,126,20,.15);color:var(--accent);padding:3px 9px;border-radius:999px}
.share,.save{background:transparent;border:1px solid var(--border);color:var(--fg);padding:5px 10px;border-radius:8px;cursor:pointer}
.wa{background:#25D366;color:#fff;padding:5px 10px;border-radius:8px}.wa:hover{color:#fff}
.site-footer{background:var(--card);border-top:1px solid var(--border);padding:36px 0 16px;margin-top:36px}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:24px}
.footer-grid h4{margin:0 0 10px}
.footer-grid ul{list-style:none;padding:0;margin:0}
.footer-grid li{margin-bottom:6px}
.copyright{text-align:center;color:var(--muted);margin-top:24px;font-size:.9rem}
.quiz-shell{max-width:780px;margin:30px auto}
.timer{font-weight:700;color:var(--accent)}
.legal-content{max-width:880px;margin:30px auto;padding:24px;background:var(--card);border:1px solid var(--border);border-radius:var(--radius)}
.legal-content h1{margin-top:0}
.legal-content h2{margin-top:24px}
.dashboard-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:14px;margin:18px 0}
.stat{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:16px;text-align:center}
.stat .num{font-size:1.7rem;font-weight:800;color:var(--primary)}
.admin-form{display:grid;gap:10px;max-width:680px}
.admin-form input,.admin-form textarea,.admin-form select{padding:10px;border-radius:10px;border:1px solid var(--border);background:var(--bg);color:var(--fg);font:inherit}
.admin-form button{padding:12px;border-radius:10px;border:0;background:var(--primary);color:#fff;font-weight:600;cursor:pointer}