:root{--bg: #0f172a;--card-bg: #1e293b;--text: #f1f5f9;--muted: #94a3b8;--accent: #38bdf8;--accent-hover: #0ea5e9}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;min-height:100vh;padding:60px 20px}.container{max-width:720px;margin:0 auto}header{text-align:center;margin-bottom:40px}header h1{font-size:2.8rem;background:linear-gradient(90deg,var(--accent),#818cf8);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.subtitle{color:var(--muted);font-size:1.1rem;margin-top:8px}.card{background:var(--card-bg);border-radius:16px;padding:28px;margin-bottom:24px;box-shadow:0 10px 30px #00000040}.card h2{color:var(--accent);font-size:1.3rem;margin-bottom:14px}.tech-list{margin-left:20px;color:var(--muted)}.tech-list li{margin-bottom:8px}.hint{color:var(--muted);margin-bottom:16px}.api-group{display:flex;flex-direction:column;gap:20px}.api-item{background:#0b1220;border-radius:12px;padding:18px}.api-url{font-family:monospace;color:#a5b4fc;background:#1e293b;padding:8px 12px;border-radius:6px;display:inline-block;margin-bottom:12px}.btn{padding:10px 18px;border-radius:8px;border:none;background:var(--accent);color:#0f172a;font-weight:600;cursor:pointer;transition:background .2s}.btn:hover:not(:disabled){background:var(--accent-hover)}.btn:disabled{opacity:.6;cursor:not-allowed}.result{margin-top:14px;padding:14px;background:#0f172a;border-radius:8px;color:#86efac;font-family:monospace;white-space:pre-wrap;min-height:60px}.code-block{margin-top:14px;padding:16px;background:#0b1220;border-radius:12px;color:#a5b4fc;font-family:monospace;overflow-x:auto}footer{text-align:center;color:var(--muted);font-size:.9rem;margin-top:20px}code{background:#0b1220;padding:2px 6px;border-radius:4px;color:#a5b4fc}