:root {
            --bg: #0f172a; --card: #1e293b; --primary: #3b82f6;
            --text: #f1f5f9; --dim: #94a3b8; --green: #10b981;
            --danger: #f87171; --warning-bg: rgba(245, 158, 11, .08);
        }
        * { box-sizing: border-box; }
        body { margin: 0; background: var(--bg); color: var(--text); font-family: system-ui, sans-serif; padding: 15px; }
        .wrapper { max-width: 700px; margin: 0 auto; }
        .card { background: var(--card); border-radius: 12px; padding: 20px; border: 1px solid #334155; margin-bottom: 20px; }
        .label { display: block; font-size: .85rem; color: var(--dim); margin-bottom: 8px; font-weight: 600; }
        input, select {
            width: 100%; padding: 12px; background: #0b1120; border: 1px solid #475569;
            border-radius: 8px; color: #fff; font-size: 1rem; margin-bottom: 15px;
        }
        input[aria-invalid="true"] { border-color: var(--danger); }
        .grid { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
        .hidden { display: none; }
        .help { margin: -8px 0 15px; color: var(--dim); font-size: .78rem; line-height: 1.55; }
        .notice {
            margin: 0 0 15px; padding: 10px 12px; border: 1px solid rgba(245, 158, 11, .35);
            border-radius: 8px; background: var(--warning-bg); color: #fcd34d; font-size: .8rem; line-height: 1.55;
        }
        .error { min-height: 1.2em; margin: -8px 0 12px; color: var(--danger); font-size: .78rem; }
        pre {
            background: #000; padding: 15px; border-radius: 10px; font-family: ui-monospace, monospace; font-size: .85rem;
            color: #e2e8f0; overflow-x: auto; border: 1px solid #334155; line-height: 1.5; white-space: pre-wrap;
        }
        .btn-group { display: flex; gap: 10px; margin-top: 15px; }
        .btn { flex: 1; padding: 12px; border: none; border-radius: 8px; font-weight: bold; cursor: pointer; display: flex; align-items: center; justify-content: center; gap: 8px; }
        .btn:disabled { cursor: not-allowed; opacity: .5; }
        .btn-blue { background: var(--primary); color: #fff; }
        .btn-green { background: var(--green); color: #fff; }
        .footer-notice {
            margin-top: 30px; padding: 15px; border-radius: 10px;
            background: rgba(59, 130, 246, .05); border: 1px dashed rgba(59, 130, 246, .3);
            text-align: center; font-size: .85rem; color: var(--dim);
        }
        .footer-notice a { color: var(--primary); text-decoration: none; font-weight: bold; }
        @media (max-width: 560px) {
            .grid { grid-template-columns: 1fr; gap: 0; }
            .btn-group { flex-direction: column; }
        }