/**
 * styles/screens/sentence-settings.css
 * Complexity picker for Sentence Mode.
 * All colors via CSS custom properties. Border radius ≤ 4px. Touch targets ≥ 48px.
 * Content column matches main-menu / session-settings (420px → 460px desktop).
 */

.sentence-settings-screen {
  display: flex;
  flex-direction: column;
  align-items: center;          /* center the constrained column */
  min-height: 100%;
  padding: var(--space-md);
  background: var(--color-background);
  color: var(--color-text);
  box-sizing: border-box;
}

/* Constrained content column — matches main-menu / session-settings */
.sentence-settings-screen .config-header,
.sentence-settings-screen .config-body,
.sentence-settings-screen .config-actions {
  width: 100%;
  max-width: 420px;
}

.sentence-settings-screen .config-header {
  text-align: center;
  margin-bottom: var(--space-lg);
}

.sentence-settings-screen .screen-title {
  font-family: var(--font-display);
  font-size: var(--font-size-xl);
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
  text-align: center;
}

.sentence-settings-screen .screen-subtitle {
  font-family: var(--font-display);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  text-align: center;
}

.sentence-settings-screen .config-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.sentence-settings-screen .section-label {
  font-family: var(--font-display);
  font-size: var(--font-size-sm);
  color: var(--color-secondary);
  letter-spacing: 1px;
  text-align: center;
}

.sentence-settings-screen .complexity-grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  width: 100%;
}

.sentence-settings-screen .complexity-card {
  display: flex;
  flex-direction: column;
  align-items: center;          /* center content */
  justify-content: center;
  width: 100%;
  min-height: 56px;
  padding: var(--space-md);
  background: var(--color-surface);
  border: 2px solid var(--color-text-muted);
  border-radius: var(--border-radius-md);
  color: var(--color-text);
  font-family: var(--font-display);
  text-align: center;           /* all text centered */
  cursor: pointer;
  transition: border-color var(--transition-fast), background var(--transition-fast);
  box-sizing: border-box;
}

.sentence-settings-screen .complexity-card.selected {
  border-color: var(--color-primary);
  background: var(--color-surface);
  box-shadow: 0 0 0 1px var(--color-primary);
}

.sentence-settings-screen .complexity-label {
  font-size: var(--font-size-md);
  color: var(--color-text);
  margin-bottom: var(--space-xs);
  text-align: center;
}

.sentence-settings-screen .complexity-card.selected .complexity-label {
  color: var(--color-primary);
}

.sentence-settings-screen .complexity-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  font-family: var(--font-display);
  text-align: center;
}

.sentence-settings-screen .config-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-top: var(--space-lg);
  padding-bottom: var(--space-md);
}

.sentence-settings-screen .btn {
  width: 100%;                  /* fill the constrained column */
  min-height: 48px;
  font-family: var(--font-display);
  font-size: var(--font-size-md);
  border-radius: var(--border-radius-md);
  border: 2px solid var(--color-text-muted);
  background: var(--color-surface);
  color: var(--color-text);
  cursor: pointer;
  text-align: center;
  box-sizing: border-box;
}

.sentence-settings-screen .btn-primary {
  border-color: var(--color-primary);
  background: var(--color-primary);
  color: var(--color-background);
}

.sentence-settings-screen .btn:active {
  transform: scale(0.98);
}

/* Desktop — match main-menu column width */
@media (min-width: 640px) {
  .sentence-settings-screen {
    padding: calc(var(--space-xl) + var(--space-lg)) var(--space-md) var(--space-xl);
  }

  .sentence-settings-screen .config-header,
  .sentence-settings-screen .config-body,
  .sentence-settings-screen .config-actions {
    max-width: 460px;
  }
}