.timer-section {
  padding: var(--spacing-xl) var(--spacing-sm);
}

/* Tabs */
.timer-tabs {
  display: flex;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-lg);
  border-bottom: 2px solid var(--color-border);
  padding-bottom: var(--spacing-xs);
}

.timer-tab {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius) var(--border-radius) 0 0;
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
  cursor: pointer;
  border: 2px solid transparent;
  border-bottom: none;
  background: transparent;
  color: var(--color-secondary);
  font-size: var(--font-size-base);
}

.timer-tab:hover {
  color: var(--color-primary);
  background-color: var(--color-surface);
}

.timer-tab.active {
  background-color: var(--color-primary);
  color: white;
}

/* Tab panels */
.timer-tab-panel {
  display: none;
}

.timer-tab-panel.active {
  display: block;
}

/* Config view */
.interval-table {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-md);
}

.interval-row {
  display: flex;
  gap: var(--spacing-xs);
  align-items: center;
}

.interval-header {
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--color-secondary);
  padding-bottom: var(--spacing-xs);
  border-bottom: 1px solid var(--color-border);
}

.interval-header .interval-input-number,
.interval-header .interval-input-name {
  text-align: center;
}

.interval-remove-btn-placeholder {
  width: 42px;
}

.interval-input {
  padding: var(--spacing-xs) var(--spacing-sm);
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius);
  background-color: var(--color-surface);
  color: var(--color-text);
  font-size: var(--font-size-base);
  transition: var(--transition);
}

.interval-input:focus {
  outline: none;
  border-color: var(--color-primary);
}

.interval-input-name {
  flex: 1;
  min-width: 0;
}

.interval-input-number {
  width: 80px;
  text-align: center;
}

.interval-remove-btn {
  padding: var(--spacing-xs) var(--spacing-sm);
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius);
  background: transparent;
  color: var(--color-secondary);
  cursor: pointer;
  font-size: var(--font-size-base);
  transition: var(--transition);
}

.interval-remove-btn:hover:not(:disabled) {
  border-color: #dc3545;
  color: #dc3545;
}

.interval-remove-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.interval-actions {
  margin-bottom: var(--spacing-md);
}

.timer-rounds {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.timer-rounds label {
  font-weight: 500;
}

.timer-errors {
  color: #dc3545;
  margin-bottom: var(--spacing-sm);
}

.timer-errors p {
  margin-bottom: var(--spacing-xs);
}

.timer-warning {
  background-color: #fff3cd;
  color: #856404;
  padding: var(--spacing-sm);
  border-radius: var(--border-radius);
  margin-bottom: var(--spacing-md);
  border: 1px solid #ffc107;
}

[data-theme="dark"] .timer-warning {
  background-color: #332701;
  color: #ffc107;
  border-color: #665000;
}

.timer-config-actions {
  display: flex;
  gap: var(--spacing-sm);
  align-items: center;
  flex-wrap: wrap;
}

.copy-confirmation {
  color: var(--color-accent);
  font-weight: 500;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.copy-confirmation.visible {
  opacity: 1;
}

/* Running view */
.timer-running {
  text-align: center;
}

.timer-display {
  margin-bottom: var(--spacing-lg);
}

.timer-interval-name {
  font-size: var(--font-size-xlarge);
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
}

.timer-countdown {
  font-size: 4rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--color-text);
  line-height: 1.2;
}

.timer-round-indicator {
  font-size: var(--font-size-large);
  color: var(--color-secondary);
  margin-top: var(--spacing-xs);
}

.timer-controls {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--spacing-lg);
}

.timer-upcoming {
  text-align: left;
  max-width: 400px;
  margin: 0 auto;
}

.timer-upcoming h3 {
  font-size: var(--font-size-base);
  color: var(--color-secondary);
  margin-bottom: var(--spacing-xs);
}

.timer-upcoming-item {
  padding: var(--spacing-xs) 0;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
  display: flex;
  justify-content: space-between;
}

.timer-complete {
  font-size: var(--font-size-xlarge);
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: var(--spacing-lg);
}

/* Presentation overlay */
.presentation-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: #111;
  z-index: 200;
  display: none;
}

.presentation-overlay.active {
  display: flex;
  align-items: center;
  justify-content: center;
}

.presentation-layout {
  display: flex;
  width: 100%;
  height: 100%;
  align-items: center;
}

.presentation-content {
  flex: 4;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100%;
  padding: 0 var(--spacing-lg);
}

.presentation-sidebar {
  flex: 1;
  border-left: 1px solid rgba(255, 255, 255, 0.15);
  padding: var(--spacing-xl) var(--spacing-lg);
  align-self: stretch;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.presentation-sidebar-heading {
  font-size: var(--font-size-large);
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: var(--spacing-md);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.presentation-upcoming-item {
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--font-size-large);
}

.presentation-exit-btn {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  padding: var(--spacing-xs) var(--spacing-sm);
  border: 2px solid rgba(255, 255, 255, 0.5);
  border-radius: var(--border-radius);
  background: transparent;
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--font-size-base);
  cursor: pointer;
  transition: var(--transition);
  z-index: 210;
}

.presentation-exit-btn:hover {
  border-color: white;
  color: white;
}

.presentation-interval-name {
  font-size: 5rem;
  font-weight: 600;
  color: white;
  margin-bottom: var(--spacing-lg);
}

.presentation-countdown {
  font-size: clamp(8rem, 20vw, 22rem);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: white;
  line-height: 1;
  width: 100%;
}

.presentation-round {
  font-size: var(--font-size-xlarge);
  color: rgba(255, 255, 255, 0.7);
  margin-top: var(--spacing-lg);
}

.presentation-paused {
  animation: pulse-opacity 1.5s ease-in-out infinite;
}

@keyframes pulse-opacity {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.4;
  }
}

/* Responsive */
@media (max-width: 768px) {
  .interval-row {
    flex-wrap: wrap;
  }

  .interval-header {
    display: none;
  }

  .interval-input-name {
    flex-basis: 100%;
  }

  .interval-input-number {
    width: 70px;
  }

  .timer-countdown {
    font-size: 3rem;
  }

  .presentation-layout {
    flex-direction: column;
  }

  .presentation-content {
    min-height: auto;
    flex: 1;
    padding-top: var(--spacing-xl);
  }

  .presentation-sidebar {
    flex: none;
    border-left: none;
    border-top: 1px solid rgba(255, 255, 255, 0.15);
    padding: var(--spacing-md);
    width: 100%;
  }

  .presentation-countdown {
    font-size: 6rem;
  }

  .presentation-interval-name {
    font-size: 2.5rem;
  }

  .timer-controls {
    gap: var(--spacing-xs);
  }

  .timer-config-actions {
    flex-direction: column;
    align-items: stretch;
  }
}