:root {
  --bg: #0b0f17;
  --card: #111827;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --border: #253041;
  --accent: #60a5fa;
  --danger: #f87171;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  background: radial-gradient(1000px 600px at 20% 10%, #12203a, var(--bg));
  color: var(--text);
}

.container {
  max-width: 920px;
  margin: 0 auto;
  padding: 28px 18px 56px;
}

.header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
}

.brand {
  font-weight: 700;
  letter-spacing: 0.2px;
  font-size: 22px;
}

.small {
  color: var(--muted);
  font-size: 13px;
}

.card {
  background: color-mix(in srgb, var(--card) 88%, transparent);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.35);
}

label {
  display: block;
  margin: 10px 0 6px;
  color: var(--muted);
  font-size: 13px;
}

input, select, button {
  width: 100%;
  padding: 11px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #0f172a;
  color: var(--text);
  outline: none;
}

input::placeholder { color: #6b7280; }

.row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

@media (min-width: 720px) {
  .row.two { grid-template-columns: 1fr 1fr; }
}

button {
  margin-top: 14px;
  background: linear-gradient(180deg, color-mix(in srgb, var(--accent) 95%, white), var(--accent));
  border: 0;
  color: #0b1220;
  font-weight: 700;
  cursor: pointer;
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.result {
  margin-top: 14px;
  padding: 12px;
  border-radius: 12px;
  border: 1px dashed var(--border);
  background: rgba(15, 23, 42, 0.55);
}

.result a {
  color: var(--accent);
  text-decoration: none;
  word-break: break-all;
}

.error {
  margin-top: 14px;
  padding: 12px;
  border-radius: 12px;
  border: 1px solid color-mix(in srgb, var(--danger) 60%, var(--border));
  background: rgba(248, 113, 113, 0.08);
  color: #fecaca;
}