:root{--bg:#06111f;--card:#0c1b2f;--blue:#2b8cff;--green:#38f58a;--purple:#8d5cff;--text:#eef6ff;--muted:#9cb2ca;--border:#20385a;}
*{box-sizing:border-box}body{margin:0;font-family:Arial,Helvetica,sans-serif;background:radial-gradient(circle at top,#102b50,#030812 55%);color:var(--text)}
.hero{padding:24px;display:flex;justify-content:space-between;gap:20px;align-items:center;border-bottom:1px solid var(--border);position:sticky;top:0;background:rgba(3,8,18,.94);z-index:2}.brand-row{display:flex;gap:14px;align-items:center}.shield{width:56px;height:56px;border-radius:16px;background:linear-gradient(145deg,#0e67ca,#06111f);display:grid;place-items:center;font-weight:900;font-size:30px;border:2px solid #76b6ff}h1{margin:0;font-size:30px;letter-spacing:2px}h1 span{display:block;color:var(--blue);font-size:18px;letter-spacing:8px}.hero p{margin:4px 0 0;color:var(--green);text-transform:uppercase;font-size:13px}nav{display:flex;gap:10px;flex-wrap:wrap}button{background:linear-gradient(135deg,#1269ff,#6d45ff);color:white;border:0;border-radius:12px;padding:12px 16px;font-weight:700;cursor:pointer}button:hover{filter:brightness(1.1)}main{max-width:1100px;margin:0 auto;padding:24px}.concept-card{background:var(--card);border:1px solid var(--border);border-radius:20px;overflow:hidden;margin-bottom:22px;box-shadow:0 20px 60px rgba(0,0,0,.25)}.concept-card img{width:100%;display:block}.panel{display:none;background:rgba(12,27,47,.88);border:1px solid var(--border);border-radius:20px;padding:22px;margin-bottom:22px}.panel.active{display:block}h2{margin-top:0}.small,.panel p{color:var(--muted)}.searchbox{display:flex;gap:12px}input{width:100%;padding:14px;border-radius:12px;border:1px solid var(--border);background:#071426;color:var(--text);margin:6px 0}.output{margin-top:16px;padding:16px;border-radius:14px;background:#071426;border:1px solid var(--border);white-space:pre-wrap;min-height:64px}.grid2{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px}.forms{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px}.card{border:1px solid var(--border);border-radius:14px;padding:12px;margin:10px 0;background:#0b1a30}.badge{display:inline-block;padding:4px 8px;border-radius:999px;background:rgba(56,245,138,.15);color:var(--green);font-size:12px;margin-left:6px}footer{color:var(--muted);text-align:center;padding:24px;border-top:1px solid var(--border)}@media(max-width:720px){.hero{align-items:flex-start;flex-direction:column}.searchbox{flex-direction:column}h1{font-size:24px}}