/* flashcard.css
   Scoped styles for Flashcard Mode screen only
   Korean Vocabulary PWA — Late 80s/Early 90s Arcade CRT Aesthetic
   Hard edges, neon glows, high contrast. All colors via CSS variables only.
   No raw hex, rgb, hsl, or color literals anywhere.
*/

#flashcard-screen {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  background: var(--color-background);
  position: relative;
  overflow: hidden;
  font-family: var(--font-display);
}

/* Flashcard HUD — minimal top bar with stats */
#flashcard-hud {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) var(--space-md);
  background: var(--color-surface);
  border-bottom: 2px solid var(--color-primary);
  box-shadow: 0 0 10px var(--color-primary);
  z-index: 100;
  flex-shrink: 0;
}

.hud-stats {
  display: flex;
  gap: var(--space-xl);
  align-items: center;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 72px;
}

.stat-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  line-height: 1;
}

.stat-value {
  font-size: var(--font-size-lg);
  color: var(--color-accent);
  line-height: 1;
  font-weight: 400;
}

/* Main content area — card + rating controls centered */
.flashcard-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg) var(--space-md);
  gap: var(--space-xl);
  position: relative;
}

.card-inner {
  transition: transform 0.2s ease-in;
  transform: scaleX(1);
  cursor: pointer;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.card-inner.flip-out {
  transform: scaleX(0);
}

.card-inner.flip-in {
  transform: scaleX(1);
  transition: transform 0.2s ease-out;
}

#card-word {
  font-family: var(--font-korean);
  font-weight: 900;
  font-size: 58px;
  color: var(--color-text);
  text-align: center;
  line-height: 1.05;
  text-shadow: 0 0 6px var(--color-text);
  transition: font-size 0.1s ease, font-family 0.1s ease;
}

#card-word.card-word--english {
  font-family: var(--font-display);
  font-size: 28px;
  text-shadow: 0 0 0px var(--color-text);

}
/* Rating buttons section — hidden until card is flipped */
.rating-container {
  width: 100%;
  max-width: 380px;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  z-index: 2;
}

.rating-section.visible {
  display: flex;
}

.rating-label {
  font-family: var(--font-display);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* Rating button grid */
.rating-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  width: 100%;
  justify-content: center;
}

/* Neon-bordered arcade rating buttons (48px+ touch targets) */
.rating-btn {
  flex: 1 1 calc(50% - var(--space-sm));
  min-height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: var(--font-size-md);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  background: transparent;
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
  border-radius: var(--border-radius-sm);
  padding: var(--space-sm) var(--space-md);
  cursor: pointer;
  transition: transform var(--transition-speed), 
              box-shadow var(--transition-speed);
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  box-shadow: 0 0 6px var(--color-primary);
}

/* Outcome-specific neon accent colors via tokens */
.rating-btn.btn-miss {
  border-color: var(--color-incorrect);
  color: var(--color-incorrect);
  box-shadow: 0 0 6px var(--color-incorrect);
}

.rating-btn.btn-hard {
  border-color: var(--color-text-muted);
  color: var(--color-text-muted);
  box-shadow: 0 0 6px var(--color-text-muted);
}

.rating-btn.btn-moderate {
  border-color: var(--color-secondary);
  color: var(--color-secondary);
  box-shadow: 0 0 6px var(--color-secondary);
}

.rating-btn.btn-easy {
  border-color: var(--color-correct);
  color: var(--color-correct);
  box-shadow: 0 0 6px var(--color-correct);
}

/* Press / active feedback — scale + stronger glow using currentColor */
.rating-btn:active,
.rating-btn.active {
  transform: scale(0.94);
  box-shadow: 0 0 14px currentColor;
}

/* Bottom footer bar for navigation */
.flashcard-footer {
  padding: var(--space-md) var(--space-lg);
  display: flex;
  justify-content: center;
  flex-shrink: 0;
  z-index: 10;
}

/* Responsive scaling for tablets/desktop */
@media (min-width: 768px) {
  .card-outer {
    width: min(420px, 45vw);
    height: min(320px, 42vh);
    min-width: 280px;
    margin: 0 auto;
  }

  #card-hangul {
    font-size: 58px;
  }

  #card-english {
    font-size: 36px;
  }

  .rating-btn {
    flex: 0 1 160px;
  }
}

/* Reduced motion accessibility */
@media (prefers-reduced-motion: reduce) {
  .card-inner,
  .card-inner.flip-out,
  .card-inner.flip-in {
    transition: none !important;
  }
}