:root {
  --bg: #0f172a;
  --card: #111827;
  --muted: #94a3b8;
  --accent: #22d3ee;
  --accent-strong: #06b6d4;
  --text: #e2e8f0;
  --border: #1f2937;
  --danger: #f87171;
  --success: #34d399;
  --warning: #fbbf24;
  --font: "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font);
  background: radial-gradient(circle at 20% 20%, #0b1224, #0f172a 45%), #0f172a;
  color: var(--text);
  min-height: 100vh;
}

.hero {
  padding: 32px 20px;
  background: linear-gradient(
      135deg,
      rgba(34, 211, 238, 0.18),
      rgba(6, 182, 212, 0.12)
    ),
    #0b1220;
  border-bottom: 1px solid var(--border);
}

.hero__content {
  max-width: 960px;
  margin: 0 auto;
}

h1 {
  margin: 0 0 8px;
  font-size: 2rem;
}

p {
  margin: 0;
  color: var(--muted);
}

.layout {
  max-width: 1100px;
  margin: 24px auto;
  padding: 0 20px 60px;
  display: grid;
  grid-template-columns: 2fr 1.2fr;
  gap: 20px;
}

.hidden {
  display: none;
}

.lead {
  color: var(--muted);
  margin: 0 0 12px;
}

.muted {
  color: var(--muted);
  margin-top: 12px;
  font-size: 0.95rem;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
}

.card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

h2 {
  margin: 0 0 12px;
  font-size: 1.1rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}

.field span {
  font-weight: 600;
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.date-control {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
  align-items: center;
}

.icon-button {
  padding: 12px;
  border: 1px solid var(--border);
  background: #0b1324;
  color: var(--text);
  border-radius: 10px;
  cursor: pointer;
}

.icon-button:hover {
  border-color: var(--accent-strong);
}

.date-pop {
  margin-top: 8px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 8px;
  background: #0b1324;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px;
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.3);
}

input,
textarea,
button {
  font: inherit;
}

input,
textarea {
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #0b1324;
  color: var(--text);
}

input:focus,
textarea:focus {
  outline: 2px solid var(--accent-strong);
  border-color: var(--accent-strong);
}

.options {
  display: flex;
  gap: 12px;
  background: #0b1324;
  border: 1px solid var(--border);
  padding: 10px 12px;
  border-radius: 10px;
}

button {
  cursor: pointer;
  border: none;
  border-radius: 10px;
  padding: 12px 16px;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #0b1220;
  font-weight: 700;
  transition: transform 0.08s ease, box-shadow 0.12s ease;
}

button:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(34, 211, 238, 0.25);
}

button.secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.actions {
  display: flex;
  gap: 12px;
  margin-top: 8px;
}

.error {
  color: var(--danger);
  min-height: 16px;
  font-size: 0.9rem;
}

.field__hint {
  color: var(--muted);
  font-size: 0.9rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 6px 10px;
  border-radius: 999px;
  font-weight: 700;
  color: #0b1220;
  background: var(--warning);
}

.preview {
  margin: 0;
  white-space: pre-wrap;
  background: #0b1324;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
  min-height: 200px;
  color: var(--text);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

.footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.95rem;
  padding: 16px 0 40px;
}

@media (max-width: 900px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .actions {
    flex-direction: column;
  }

  .options {
    flex-direction: column;
  }
}