/* =================================================================
   session-summary.css
   Korean Vocabulary PWA — Session Summary Screen
   Arcade (Late 80s / Early 90s CRT) Aesthetic
   -----------------------------------------------------------------
   • All colors reference ONLY CSS custom properties (design tokens)
   • No raw hex, rgb(), hsl(), or hardcoded color literals anywhere
   • Hard edges (border-radius via --border-radius-sm)
   • Neon glows via box-shadow using var(--color-*) 
   • Pixel font via --font-display / --font-korean
   • Scoped exclusively to .session-summary-screen root
   • Touch targets ≥ 48px
   • Consistent with layout.css .btn system + leitner utility classes
   ================================================================= */

/* Root container — full viewport, scrollable, arcade dark field */
.session-summary-screen {
  position: relative;
  width: 100%;
  min-height: 100vh;
  padding: var(--space-lg) var(--space-md);
  padding-bottom: calc(var(--space-xl) + 80px); /* safe area for floating buttons */
  background-color: var(--color-background);
  color: var(--color-text);
  font-family: var(--font-body);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  box-sizing: border-box;
}

/* Screen header / title — attract-mode CRT energy */
.session-summary-screen .summary-title {
  font-family: var(--font-display);
  font-size: var(--font-size-xl);
  font-weight: normal;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  text-align: center;
  margin: 0 0 var(--space-lg) 0;
  color: var(--color-accent);
  text-shadow: 
    0 0 6px var(--color-accent),
    0 0 14px var(--color-accent);
  line-height: 1.1;
}

/* Stats grid — 3 key metrics at a glance */
.session-summary-screen .stats-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

@media (min-width: 520px) {
  .session-summary-screen .stats-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.session-summary-screen .stat-card {
  background-color: var(--color-surface);
  border: 2px solid var(--color-primary);
  border-radius: var(--border-radius-sm);
  padding: var(--space-md) var(--space-sm);
  text-align: center;
  box-shadow: 0 0 8px var(--color-primary);
  transition: transform var(--transition-speed), 
              box-shadow var(--transition-speed);
  user-select: none;
}

.session-summary-screen .stat-card:active {
  transform: scale(0.96);
  box-shadow: 0 0 4px var(--color-primary);
}

.session-summary-screen .stat-label {
  font-family: var(--font-display);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-xs);
  line-height: 1;
}

.session-summary-screen .stat-value {
  font-family: var(--font-display);
  font-size: var(--font-size-xxl);
  color: var(--color-accent);
  line-height: 1;
  text-shadow: 0 0 8px var(--color-accent);
  margin-top: var(--space-xs);
}

/* Worst performing words section */
.session-summary-screen .worst-section {
  margin-bottom: var(--space-xl);
}

.session-summary-screen .section-title {
  font-family: var(--font-display);
  font-size: var(--font-size-lg);
  color: var(--color-secondary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 0 0 var(--space-md) 0;
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--color-text-muted);
}

/* Word list — vertical stack of neon-bordered cards */
.session-summary-screen .word-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

/* Individual word card — inherits leitner color via JS-applied class */
.session-summary-screen .word-card {
  background-color: var(--color-surface);
  border: 2px solid var(--color-text-muted);
  border-radius: var(--border-radius-sm);
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  box-shadow: 0 0 6px var(--color-text-muted);
  transition: box-shadow var(--transition-speed), 
              border-color var(--transition-speed);
  min-height: 48px; /* touch-friendly */
}

.session-summary-screen .word-card.leitner-1 {
  border-color: var(--color-leitner-1);
  box-shadow: 0 0 10px var(--color-leitner-1);
}

.session-summary-screen .word-card.leitner-2 {
  border-color: var(--color-leitner-2);
  box-shadow: 0 0 10px var(--color-leitner-2);
}

.session-summary-screen .word-card.leitner-3 {
  border-color: var(--color-leitner-3);
  box-shadow: 0 0 10px var(--color-leitner-3);
}

.session-summary-screen .word-card.leitner-4 {
  border-color: var(--color-leitner-4);
  box-shadow: 0 0 10px var(--color-leitner-4);
}

.session-summary-screen .word-card.leitner-5 {
  border-color: var(--color-leitner-5);
  box-shadow: 0 0 10px var(--color-leitner-5);
}

/* Hangul — large, bold, high-contrast Korean */
.session-summary-screen .word-hangul {
  font-family: var(--font-korean);
  font-size: var(--font-size-xl);
  font-weight: 900;
  color: var(--color-text);
  line-height: 1.1;
}

/* English translation */
.session-summary-screen .word-english {
  font-family: var(--font-body);
  font-size: var(--font-size-md);
  color: var(--color-text-muted);
  line-height: 1.3;
}

/* Meta line (seen / correct counts) */
.session-summary-screen .word-meta {
  font-family: var(--font-display);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-xs);
  letter-spacing: 0.04em;
}

/* New words unlocked banner — neon pop */
.session-summary-screen .unlock-banner {
  background-color: var(--color-surface);
  border: 2px solid var(--color-accent);
  border-radius: var(--border-radius-sm);
  padding: var(--space-md);
  margin-bottom: var(--space-lg);
  text-align: center;
  box-shadow: 0 0 14px var(--color-accent);
  display: none;
  animation: banner-pop-in 280ms cubic-bezier(0.23, 1.0, 0.32, 1);
}

.session-summary-screen .unlock-banner.visible {
  display: block;
}

.session-summary-screen .unlock-banner .banner-text {
  font-family: var(--font-display);
  font-size: var(--font-size-md);
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.session-summary-screen .unlock-banner .banner-count {
  font-family: var(--font-display);
  font-size: var(--font-size-xl);
  color: var(--color-accent);
  display: block;
  margin-top: var(--space-xs);
  text-shadow: 0 0 8px var(--color-accent);
}

/* Action button cluster — full-width on mobile, centered row on larger */
.session-summary-screen .action-buttons {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-top: var(--space-xl);
}

@media (min-width: 520px) {
  .session-summary-screen .action-buttons {
    flex-direction: row;
    justify-content: center;
    gap: var(--space-lg);
  }
}

/* Buttons inherit .btn from layout.css but get screen-specific sizing + primary treatment */
.session-summary-screen .action-buttons .btn {
  width: 100%;
  min-height: 56px;
  font-size: var(--font-size-md);
  letter-spacing: 0.06em;
  display: flex;
  align-items: center;
  justify-content: center;
}

@media (min-width: 520px) {
  .session-summary-screen .action-buttons .btn {
    width: auto;
    min-width: 220px;
    padding-left: var(--space-xl);
    padding-right: var(--space-xl);
  }
}

/* Primary CTA (Flashcard review) — filled neon style */
.session-summary-screen .action-buttons .btn-primary {
  background-color: var(--color-primary);
  color: var(--color-background);
  border-color: var(--color-primary);
  box-shadow: 0 0 10px var(--color-primary);
}

.session-summary-screen .action-buttons .btn-primary:active {
  transform: scale(0.96);
  box-shadow: 0 0 18px var(--color-primary);
}

/* Subtle CRT pop animation for the unlock banner */
@keyframes banner-pop-in {
  0% {
    transform: translateY(12px) scale(0.92);
    opacity: 0;
  }
  60% {
    transform: translateY(-2px) scale(1.01);
  }
  100% {
    transform: translateY(0) scale(1);
    opacity: 1;
  }
}

/* Accessibility / reduced motion */
@media (prefers-reduced-motion: reduce) {
  .session-summary-screen .unlock-banner {
    animation: none;
  }
  .session-summary-screen .stat-card:active,
  .session-summary-screen .action-buttons .btn:active {
    transform: none;
  }
}