:root {
  --bg: #0f1419;
  --surface: #1a2332;
  --border: #2d3a4d;
  --text: #e6edf3;
  --muted: #8b9cb3;
  --accent: #3d8bfd;
  --accent-dim: #2563c4;
  --danger-bg: #3d1f24;
  --danger-border: #8b3a44;
  --danger-text: #f5b4bc;
  --radius: 10px;
  --font: "SF Pro Text", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, "Cascadia Code", "Source Code Pro", Menlo, monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.5;
  color: var(--text);
  background: radial-gradient(1200px 600px at 20% -10%, #1e3a5f 0%, transparent 55%),
    radial-gradient(900px 500px at 90% 0%, #2a1f3d 0%, transparent 50%), var(--bg);
}

.wrap {
  max-width: 52rem;
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
}

.head h1 {
  margin: 0 0 0.35rem;
  font-size: 1.65rem;
  font-weight: 650;
  letter-spacing: -0.02em;
}

.lede {
  margin: 0;
  color: var(--muted);
  max-width: 42em;
}

.api-hint {
  margin: 0.75rem 0 0;
  font-size: 0.88rem;
  color: var(--muted);
}

.api-hint a {
  color: var(--accent);
  text-decoration: none;
}

.api-hint a:hover {
  text-decoration: underline;
}

.api-hint code {
  font-family: var(--mono);
  font-size: 0.85em;
  color: var(--text);
}

.card {
  margin-top: 1.5rem;
  padding: 1.35rem 1.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.banner {
  margin-top: 1.25rem;
  padding: 0.85rem 1rem;
  border-radius: var(--radius);
  font-size: 0.95rem;
}

.banner-error {
  background: var(--danger-bg);
  border: 1px solid var(--danger-border);
  color: var(--danger-text);
}

.field {
  display: block;
  margin-bottom: 1rem;
}

.field .label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  margin-bottom: 0.4rem;
}

input[type="url"],
input[type="file"],
select {
  width: 100%;
  padding: 0.65rem 0.75rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font: inherit;
}

input[type="file"] {
  padding: 0.5rem;
}

select {
  cursor: pointer;
}

.or {
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
  margin: 0.25rem 0 1rem;
}

.row {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.grow {
  flex: 1;
  min-width: 12rem;
}

.check {
  display: flex;
  gap: 0.6rem;
  align-items: flex-start;
  margin: 0.5rem 0 1.25rem;
  font-size: 0.9rem;
  color: var(--muted);
  cursor: pointer;
}

.check input {
  margin-top: 0.2rem;
  flex-shrink: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.55rem 1.1rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.btn:hover {
  border-color: var(--muted);
}

.btn.primary {
  background: linear-gradient(180deg, var(--accent) 0%, var(--accent-dim) 100%);
  border-color: transparent;
  color: #fff;
}

.btn.primary:hover {
  filter: brightness(1.06);
}

.out {
  margin-top: 1.25rem;
}

.out-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.out-head h2 {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 650;
}

.preview {
  margin: 0;
  max-height: min(60vh, 32rem);
  overflow: auto;
  padding: 1rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #0a0e14;
  font-family: var(--mono);
  font-size: 0.82rem;
  line-height: 1.45;
  white-space: pre-wrap;
  word-break: break-word;
}