:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #666666;
  --border: #dddddd;
  --accent: #1a1a1a;
  --accent-fg: #ffffff;
  --error: #b3261e;
  --success: #1a7a3c;
  --card-bg: #f7f7f7;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16161a;
    --fg: #ededed;
    --muted: #a0a0a0;
    --border: #3a3a3a;
    --accent: #ededed;
    --accent-fg: #16161a;
    --error: #ff6b60;
    --success: #6bd48f;
    --card-bg: #222226;
  }
}

* {
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  max-width: 640px;
  margin: 0 auto;
  padding: 1.5rem 1rem 4rem;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.5;
}

header h1 {
  font-size: 1.3rem;
  margin-bottom: 0.2rem;
}

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

h2 {
  font-size: 1.15rem;
}

h3 {
  font-size: 1rem;
  margin-bottom: 0.4rem;
}

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

.optional {
  font-weight: normal;
  text-transform: none;
  color: var(--muted);
}

label {
  display: block;
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 0.8rem;
  margin-bottom: 0.25rem;
}

input,
select,
textarea {
  width: 100%;
  font-size: 1rem;
  padding: 0.55rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--fg);
}

textarea {
  resize: vertical;
  font-family: inherit;
}

button {
  font-size: 0.95rem;
  padding: 0.6rem 1rem;
  border-radius: 6px;
  border: none;
  background: var(--accent);
  color: var(--accent-fg);
  cursor: pointer;
  margin-top: 1rem;
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

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

button.link-button {
  background: none;
  border: none;
  color: var(--muted);
  text-decoration: underline;
  padding: 0;
  margin: 0;
  font-size: 0.85rem;
}

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

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

.app-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-top: 1.5rem;
}

#add-section,
#existing-section {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.event-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
  margin-top: 1rem;
}

.field-row {
  display: flex;
  gap: 0.6rem;
}

.field-row > label {
  flex: 1;
  min-width: 0;
}

.card-actions {
  display: flex;
  gap: 0.6rem;
  margin-top: 0.8rem;
}

.card-actions button {
  margin-top: 0;
}

.card-remove-button {
  background: transparent;
  border: 1px solid var(--error);
  color: var(--error);
}

.card-remove-button.confirm {
  background: var(--error);
  color: #fff;
}