:root {
    color-scheme: dark;
    --bg: #070a12;
    --card: #111827;
    --card2: #0b1220;
    --border: #263449;
    --text: #eef4ff;
    --muted: #9fb0c8;
    --accent: #3b82f6;
}
* { box-sizing: border-box; }
body {
    margin: 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 32px;
    background: radial-gradient(circle at top left, #18213a, var(--bg) 48%);
    color: var(--text);
    font: 15px/1.45 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
.card {
    width: min(980px, 100%);
    background: linear-gradient(180deg, rgba(17,24,39,.98), rgba(11,18,32,.98));
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 28px;
    box-shadow: 0 24px 80px rgba(0,0,0,.45);
}
.badge {
    display: inline-flex;
    padding: 6px 10px;
    border: 1px solid #24446f;
    border-radius: 999px;
    background: rgba(59,130,246,.14);
    color: #bcd7ff;
    font-weight: 700;
    font-size: 12px;
    letter-spacing: .02em;
}
h1 { margin: 16px 0 8px; font-size: 30px; }
.lead, .hint { color: var(--muted); }
.grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
    margin: 22px 0;
}
label {
    display: block;
    margin: 0 0 6px;
    color: #dbeafe;
    font-weight: 700;
}
pre, textarea {
    width: 100%;
    margin: 0;
    padding: 12px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: #070b18;
    color: var(--text);
    overflow: auto;
    white-space: pre-wrap;
    overflow-wrap: anywhere;
    font: 13px/1.45 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
textarea { min-height: 180px; resize: vertical; }
.actions { display: flex; gap: 12px; margin: 18px 0 0; flex-wrap: wrap; }
button {
    border: 1px solid #31517c;
    background: #14243d;
    color: var(--text);
    border-radius: 12px;
    padding: 11px 14px;
    font-weight: 800;
    cursor: pointer;
}
button:hover { border-color: var(--accent); }
@media (max-width: 760px) { .grid { grid-template-columns: 1fr; } body { padding: 16px; } }