:root{color-scheme:dark;--bg:#0b1020;--panel:#141b2f;--panel2:#1c2540;--text:#eef3ff;--muted:#9eabc7;--accent:#66d0ff;--danger:#ff7d8b;--ok:#65d69b;--line:#2a3557}*{box-sizing:border-box}body{margin:0;background:radial-gradient(circle at top,#16213c 0,#0b1020 45%);color:var(--text);font-family:Inter,Segoe UI,Arial,sans-serif;min-height:100vh}header{display:flex;align-items:center;justify-content:space-between;padding:18px 28px;border-bottom:1px solid var(--line);background:rgba(11,16,32,.9);position:sticky;top:0}.brand{font-size:20px;font-weight:700}.brand span{font-size:12px;color:var(--accent);margin-left:8px}nav{display:flex;gap:14px;align-items:center}nav a,nav button{color:var(--muted);background:none;border:0;text-decoration:none;cursor:pointer;font:inherit}nav a:hover,nav button:hover{color:var(--text)}main{max-width:1100px;margin:0 auto;padding:36px 20px}.card{background:linear-gradient(180deg,var(--panel2),var(--panel));border:1px solid var(--line);border-radius:16px;padding:24px;box-shadow:0 18px 50px rgba(0,0,0,.25)}.narrow{max-width:560px;margin:4vh auto}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px}.metric strong{display:block;font-size:32px;margin-top:8px}.muted{color:var(--muted)}label{display:block;margin:16px 0 6px;font-weight:600}input,select,textarea{width:100%;padding:12px;border-radius:10px;border:1px solid var(--line);background:#0f1629;color:var(--text)}button,.button{display:inline-block;margin-top:18px;padding:12px 18px;border-radius:10px;border:0;background:var(--accent);color:#07111d;font-weight:700;cursor:pointer;text-decoration:none}.error{background:rgba(255,125,139,.12);border:1px solid var(--danger);padding:12px;border-radius:10px;color:#ffd6db}.success{background:rgba(101,214,155,.12);border:1px solid var(--ok);padding:12px;border-radius:10px;color:#d8ffea}table{width:100%;border-collapse:collapse}th,td{text-align:left;padding:12px;border-bottom:1px solid var(--line);vertical-align:top}code{color:var(--accent)}h1{margin-top:0}