/* ==========================================================================
   onboarding.css
   Korean Vocabulary PWA — Onboarding / First Launch Flow
   Follows exact arcade visual contract. All colors via CSS variables only.
   Hard edges, 48px+ touch targets, Press Start 2P + Noto Sans KR.
   ========================================================================== */

.onboarding-screen {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 100dvh;
  background-color: var(--color-background);
  color: var(--color-text);
  font-family: var(--font-body);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.onboarding-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  max-width: 480px;
  margin: 0 auto;
  padding: var(--space-xl) var(--space-md);
  gap: var(--space-lg);
}

/* Step header */
.onboarding-header {
  text-align: center;
  margin-bottom: var(--space-md);
}

.onboarding-header .screen-title {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-sm);
}

.onboarding-header .subtitle {
  font-family: var(--font-body);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
}

/* Intro content */
.intro-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  text-align: center;
}

.intro-content p {
  font-size: var(--font-size-md);
  line-height: 1.5;
  color: var(--color-text);
}

.feature-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  text-align: left;
  margin: var(--space-md) 0;
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  font-size: var(--font-size-sm);
}

.feature-item .icon {
  font-family: var(--font-display);
  color: var(--color-accent);
  min-width: 24px;
}

/* Language selection */
.language-option {
  width: 100%;
  max-width: 320px;
  margin: 0 auto;
  padding: var(--space-md);
  border: 2px solid var(--color-primary);
  border-radius: var(--border-radius-sm);
  background: var(--color-surface);
  color: var(--color-primary);
  font-family: var(--font-display);
  font-size: var(--font-size-md);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  min-height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
}

.language-option.selected {
  background: var(--color-primary);
  color: var(--color-background);
  box-shadow: 0 0 12px var(--color-primary);
}

.language-note {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  text-align: center;
  margin-top: var(--space-sm);
}

/* Assessment card area — reuses flashcard visual language */
.assessment-card-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg) var(--space-md);
  gap: var(--space-lg);
}

.assessment-progress {
  font-family: var(--font-display);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* Result / placement screen */
.placement-result {
  text-align: center;
  padding: var(--space-xl) var(--space-md);
}

.placement-result .big-number {
  font-family: var(--font-display);
  font-size: 48px;
  color: var(--color-accent);
  line-height: 1;
  text-shadow: 0 0 6px var(--color-accent);
}

.placement-result .unit-label {
  font-family: var(--font-display);
  font-size: var(--font-size-xl);
  color: var(--color-secondary);
  margin: var(--space-md) 0;
}

/* Action buttons */
.onboarding-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-top: auto;
  padding-top: var(--space-lg);
}

.onboarding-actions .btn {
  min-height: 56px;
  font-size: var(--font-size-md);
}

/* Assessment feedback */
.assessment-feedback {
  font-family: var(--font-display);
  font-size: var(--font-size-sm);
  color: var(--color-correct);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-top: var(--space-sm);
}
.assessment-feedback.fail {
  color: var(--color-incorrect);
}