:root {
  color-scheme: dark;
  --bg: #0f1115;
  --card: #181b22;
  --muted: #9aa4b2;
  --text: #f5f7fa;
  --line: #2a303a;
  --accent: #ffffff;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--text); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
body { min-height: 100vh; }
.wrap { max-width: 720px; margin: 0 auto; padding: 20px 16px 40px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 20px; padding: 20px; box-shadow: 0 10px 30px rgba(0,0,0,.25); }
h1 { margin: 0 0 8px; font-size: 2rem; }
.sub { margin: 0 0 18px; color: var(--muted); }
label { display: block; margin: 12px 0 8px; font-weight: 600; }
textarea { width: 100%; border-radius: 14px; background: #101319; color: var(--text); border: 1px solid var(--line); padding: 14px; font: inherit; }
.row, .actions { display: grid; gap: 12px; margin-top: 14px; }
@media (min-width: 640px) { .row, .actions { grid-template-columns: 1fr 1fr; } }
button, .button {
  appearance: none; border: 1px solid var(--line); background: var(--accent); color: #111;
  border-radius: 14px; padding: 14px 16px; font-size: 1rem; font-weight: 700; text-align: center; text-decoration: none; cursor: pointer;
}
button.secondary, .button.secondary { background: transparent; color: var(--text); }
.status { margin-top: 14px; padding: 12px 14px; border-radius: 14px; background: #101319; border: 1px solid var(--line); color: var(--muted); }
.status.error { color: #ffb4b4; border-color: #7a3131; }
.preview-wrap { margin-top: 18px; }
img, video { width: 100%; border-radius: 18px; border: 1px solid var(--line); background: #0a0d12; }
details { margin-top: 18px; border-top: 1px solid var(--line); padding-top: 16px; }
summary { cursor: pointer; font-weight: 700; }
code { background: #101319; padding: 2px 6px; border-radius: 8px; }
ol { color: var(--muted); }