:root{color-scheme:dark;--bg: #121212;--card: #1f1f1f;--text: #e6e6e6;--muted: #9a9a9a;--accent: #1db954;--danger: #e05d5d;--success: #2ecc71}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text)}.container{max-width:680px;margin:0 auto;padding:24px 16px 64px}.narrow{max-width:560px}h1{margin:8px 0}.card{background:var(--card);border-radius:12px;padding:16px 20px;margin:16px 0}.card h2{margin-top:0;font-size:1.05rem}.btn{display:inline-block;background:var(--accent);color:#000;font-weight:600;border:none;border-radius:999px;padding:10px 18px;text-decoration:none;cursor:pointer;font-size:.95rem}.btn.primary{background:var(--accent);color:#000}.btn:hover{filter:brightness(1.1)}.btn:disabled{opacity:.6;cursor:default}input[type=text],input[type=number]{width:100%;padding:10px 12px;margin:6px 0 12px;border-radius:8px;border:1px solid #333;background:#181818;color:var(--text);font-size:.95rem}label{display:block;font-size:.9rem;color:var(--muted)}label.row{display:flex;align-items:center;gap:8px;margin:6px 0 12px;color:var(--text)}.spaced{margin-top:12px}ul{list-style:none;padding:0;margin:8px 0}li{padding:6px 0;border-bottom:1px solid #2a2a2a}.muted{color:var(--muted)}.small{font-size:.85rem}.error{color:var(--danger);background:#e05d5d1f;border-radius:8px;padding:8px 12px}.success{color:var(--success);background:#2ecc711f;border-radius:8px;padding:8px 12px}pre{white-space:pre-wrap;font-size:.85rem;color:var(--muted)}a{color:var(--accent)}a.muted{color:var(--muted);text-decoration:none}