:root{--bg:#071a33;--card:#fff;--ink:#102033;--muted:#667085;--accent:#f4b000;--line:#d6dde8}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;background:#eef3f9;color:var(--ink)}.top{background:linear-gradient(135deg,#071a33,#0e376a);color:white;padding:calc(18px + env(safe-area-inset-top)) 18px 16px;display:flex;justify-content:space-between;gap:12px;align-items:center;position:sticky;top:0;z-index:3;box-shadow:0 3px 16px #0003}.top h1{margin:0;font-size:25px}.top p{margin:4px 0 0;color:#d9e7ff}.ghost{border:1px solid #ffffff77;background:#ffffff18;color:white;border-radius:12px;padding:10px 14px}.tabs{display:flex;gap:6px;overflow:auto;background:#fff;padding:8px;position:sticky;top:84px;z-index:2;border-bottom:1px solid var(--line)}.tab{border:0;background:#edf2f7;padding:10px 13px;border-radius:999px;font-weight:700;white-space:nowrap}.tab.active{background:var(--accent);color:#111}main{padding:14px;max-width:1100px;margin:auto}.panel{display:none}.panel.active{display:block}.searchbar{display:flex;gap:8px;background:white;border:1px solid var(--line);border-radius:16px;padding:8px;margin-bottom:10px;box-shadow:0 2px 12px #10182812}.searchbar input{flex:1;border:0;font-size:18px;outline:0;padding:10px}.searchbar button,.card button{background:#0e376a;color:white;border:0;border-radius:12px;padding:10px 14px}.chips{display:flex;flex-wrap:wrap;gap:8px;margin:8px 0 12px}.chip{background:#fff;border:1px solid var(--line);border-radius:999px;padding:9px 12px}.cards,.topicgrid,.calcgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:12px}.card,.topic{background:white;border:1px solid var(--line);border-radius:18px;padding:14px;box-shadow:0 2px 10px #10182810}.card h3{margin:.1rem 0 .6rem}.page{color:var(--muted);font-size:13px}.hit{background:#fff1a6;border-radius:4px}.actions{display:flex;gap:8px;margin-top:10px;flex-wrap:wrap}.actions a,.actions button,.biglink{display:inline-block;text-decoration:none;background:#0e376a;color:white;border:0;border-radius:10px;padding:8px 11px}.actions .star{background:#f4b000;color:#111}.topic{cursor:pointer}.topic b{display:block}.cat{color:#0e376a;font-weight:700;font-size:12px;text-transform:uppercase;letter-spacing:.04em}.notice{background:#fff8db;border:1px solid #efd46c;border-radius:14px;padding:12px;margin-bottom:12px}label{display:block;margin:9px 0;color:#344054;font-size:14px}input,select{width:100%;font-size:16px;padding:9px;border:1px solid #cad3df;border-radius:10px;margin-top:4px}iframe{width:100%;height:75vh;border:1px solid var(--line);border-radius:18px;background:white}footer{text-align:center;color:#667085;padding:30px}#stats{color:#667085;margin:10px}.empty{padding:24px;text-align:center;color:#667085;background:white;border-radius:16px}@media(max-width:600px){.tabs{top:94px}.top h1{font-size:21px}main{padding:10px}.cards,.topicgrid,.calcgrid{grid-template-columns:1fr}}