:root {
  --bg: #f5f5f5;
  --bg-alt: #ffffff;
  --fg: #222;
  --accent: #0077ff;
  --danger: #e53935;
  --border: #ddd;
  --shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
  --font: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--fg);
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  background: var(--bg-alt);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.app-header h1 {
  margin: 0;
  font-size: 1.25rem;
}

.header-controls {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

button {
  cursor: pointer;
  border: 1px solid var(--border);
  background: var(--bg-alt);
  padding: 0.35rem 0.7rem;
  border-radius: 4px;
  font-size: 0.9rem;
}

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

.app-main {
  display: grid;
  grid-template-columns: 260px 1fr;
  min-height: calc(100vh - 56px);
}

.sidebar {
  border-right: 1px solid var(--border);
  padding: 0.75rem;
  background: #fafafa;
  overflow-y: auto;
}

.sidebar section {
  margin-bottom: 1rem;
}

.sidebar h2 {
  margin: 0 0 0.5rem;
  font-size: 0.95rem;
}

.preset-btn,
.interval-template-btn {
  display: block;
  width: 100%;
  margin-bottom: 0.25rem;
  text-align: left;
}

.timers-area {
  padding: 0.75rem;
  overflow-y: auto;
}

#timers-container {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.timer-card {
  background: var(--bg-alt);
  border-radius: 6px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  padding: 0.5rem 0.75rem;
  flex: 1 1 320px;
  max-width: 480px;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.timer-header {
  display: flex;
  gap: 0.4rem;
  align-items: center;
}

.timer-name-input {
  flex: 1;
}

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

.timer-display {
  font-size: 1.8rem;
  font-variant-numeric: tabular-nums;
}

.timer-controls {
  display: flex;
  gap: 0.25rem;
}

.timer-settings {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.5rem;
  font-size: 0.8rem;
}

.timer-settings label {
  display: block;
}

.split-preset-row {
  font-size: 0.8rem;
}

.laps-section {
  border-top: 1px solid var(--border);
  padding-top: 0.4rem;
}

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

.laps-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
}

.laps-table th,
.laps-table td {
  border-bottom: 1px solid var(--border);
  padding: 0.15rem 0.25rem;
}

.timer-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
}

.tags-row {
  flex: 1;
}

.share-row {
  display: flex;
  gap: 0.25rem;
}

/* Compact mode */
body.compact .timer-card {
  padding: 0.35rem 0.5rem;
}

body.compact .timer-settings,
body.compact .split-preset-row,
body.compact .tags-row {
  display: none;
}

/* Dark theme */
body.theme-dark {
  --bg: #111;
  --bg-alt: #1b1b1b;
  --fg: #f5f5f5;
  --border: #333;
  --accent: #4dabf7;
}

body.theme-high-contrast {
  --bg: #000;
  --bg-alt: #000;
  --fg: #fff;
  --border: #fff;
  --accent: #ffeb3b;
}

/* Modal */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999;
}

.modal.hidden {
  display: none;
}

.modal-content {
  background: var(--bg-alt);
  color: var(--fg);
  padding: 1rem;
  border-radius: 6px;
  min-width: 280px;
  max-width: 480px;
  box-shadow: var(--shadow);
  position: relative;
}

.modal-close {
  position: absolute;
  top: 0.25rem;
  right: 0.25rem;
}

#modal-text {
  width: 100%;
  min-height: 160px;
  margin-top: 0.5rem;
}

/* Accessibility-ish */
.compact-toggle {
  font-size: 0.8rem;
}