/* ================================================
   GAME PAGE - Modern CSS with Grid, Container Queries
   Baseline 2024 features: container queries, :has(),
   logical properties, color-mix(), subgrid
   ================================================ */

/* ================================================
   PAGE LAYOUT - CSS Grid with named areas
   ================================================ */
.game-page {
  display: grid;
  grid-template-rows: auto auto 1fr auto;
  grid-template-areas:
    "header"
    "progress"
    "content"
    "footer";
  min-block-size: 100vh;
  min-block-size: 100dvh;
  background: var(--background);
  view-transition-name: page-content;
}

/* ================================================
   PROGRESS BAR - Shared component
   ================================================ */
.progress-bar {
  grid-area: progress;
  block-size: 6px;
  margin-inline: var(--space-xs);
  background: color-mix(in oklch, var(--border) 60%, transparent);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-fill {
  block-size: 100%;
  inline-size: 0%;
  background: linear-gradient(
    90deg,
    var(--primary),
    color-mix(in oklch, var(--correct) 80%, var(--primary))
  );
  border-radius: var(--radius-full);
  transition: inline-size var(--duration-slow) var(--ease-out);
}

/* ================================================
   GAME CONTENT - Centered flex with container
   ================================================ */
.game-content {
  grid-area: content;
  display: grid;
  place-items: center;
  padding: var(--space-md);
  gap: var(--space-md);
  container-type: inline-size;
  container-name: game-content;
}

/* ================================================
   GAME CARD - Container query responsive
   ================================================ */
.game-card {
  inline-size: 100%;
  max-inline-size: var(--container-md);
  display: grid;
  grid-template-rows: auto auto auto auto;
  gap: var(--space-md);
  padding: var(--space-lg);
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
  container-type: inline-size;
  container-name: game-card;
}

/* Card hover lift effect */
.game-card:hover {
  box-shadow: var(--shadow-card-hover);
}

/* Container query for larger cards */
@container game-content (min-width: 500px) {
  .game-card {
    padding: var(--space-xl);
    gap: var(--space-lg);
  }
}

/* ================================================
   QUESTION SECTION
   ================================================ */
.question-section {
  text-align: center;
  padding-block: var(--space-sm);
}

.game-card .translation {
  font-size: clamp(1.5rem, 5cqi, 2.25rem);
  font-weight: var(--font-weight-bold);
  color: var(--text);
  line-height: var(--line-height-tight);
  margin-block-end: var(--space-sm);
  text-wrap: balance;
}

.hint {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ================================================
   OPTIONS - Radio group with grid
   ================================================ */
.options {
  display: grid;
  gap: var(--space-sm);
}

.option {
  position: relative;
  display: grid;
  grid-template-columns: 2rem 1fr;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md);
  padding-inline-start: var(--space-sm);
  background: var(--surface-2);
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  font: inherit;
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--text);
  cursor: pointer;
  text-align: start;
  min-block-size: 52px;
  transition:
    background var(--duration-fast) var(--ease-out),
    border-color var(--duration-fast) var(--ease-out),
    transform var(--duration-fast) var(--ease-out),
    box-shadow var(--duration-fast) var(--ease-out);
}

/* Option number badge */
.option::before {
  content: attr(data-number);
  display: grid;
  place-items: center;
  inline-size: 1.75rem;
  block-size: 1.75rem;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--text-muted);
  background: var(--surface-1);
  border-radius: var(--radius-sm);
  transition:
    background var(--duration-fast),
    color var(--duration-fast);
}

/* Hover state */
.option:hover:not(:disabled):not(.correct):not(.wrong) {
  background: var(--surface-1);
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px color-mix(in oklch, var(--primary) 15%, transparent);
}

/* Focus state */
.option:focus-visible {
  outline: none;
  border-color: var(--focus-ring);
  box-shadow: 0 0 0 3px color-mix(in oklch, var(--focus-ring) 25%, transparent);
}

/* Selected state */
.option.selected {
  background: color-mix(in oklch, var(--primary) 8%, var(--surface-1));
  border-color: var(--primary);
}

.option.selected::before {
  background: var(--primary);
  color: white;
}

/* Correct answer */
.option.correct {
  background: var(--correct-bg);
  border-color: var(--correct);
  color: var(--correct);
  animation: correctPulse var(--duration-normal) var(--ease-out);
}

.option.correct::before {
  content: '✓';
  background: var(--correct);
  color: white;
}

/* Wrong answer */
.option.wrong {
  background: var(--wrong-bg);
  border-color: var(--wrong);
  color: var(--wrong);
  animation: wrongShake var(--duration-normal) var(--ease-out);
}

.option.wrong::before {
  content: '✗';
  background: var(--wrong);
  color: white;
}

@keyframes correctPulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.015); }
}

@keyframes wrongShake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-4px); }
  40% { transform: translateX(4px); }
  60% { transform: translateX(-3px); }
  80% { transform: translateX(2px); }
}

@media (prefers-reduced-motion: reduce) {
  .option.correct,
  .option.wrong {
    animation: none;
  }
}

/* Container query for option sizing */
@container game-card (min-width: 400px) {
  .option {
    grid-template-columns: 2.25rem 1fr;
    padding: var(--space-md) var(--space-lg);
    font-size: var(--font-size-lg);
    min-block-size: 56px;
  }

  .option::before {
    inline-size: 2rem;
    block-size: 2rem;
    font-size: var(--font-size-sm);
  }
}

/* ================================================
   FEEDBACK - Status message
   ================================================ */
.feedback {
  display: grid;
  place-items: center;
  grid-auto-flow: column;
  gap: var(--space-sm);
  padding: var(--space-md);
  border-radius: var(--radius-lg);
  min-block-size: 3.5rem;
  font-weight: var(--font-weight-medium);
  text-align: center;
  transition:
    background var(--duration-fast),
    color var(--duration-fast);
}

.feedback:empty {
  background: transparent;
  min-block-size: 0;
  padding: 0;
}

.feedback.correct {
  background: var(--correct-bg);
  color: var(--correct);
}

.feedback.wrong {
  background: var(--wrong-bg);
  color: var(--wrong);
}

.feedback .icon {
  font-size: var(--font-size-xl);
  line-height: 1;
}

/* ================================================
   ACTION BUTTONS - Shared button system
   ================================================ */
.actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-sm);
  padding-block-start: var(--space-sm);
}

/* Show only visible buttons */
.actions:has(.next-btn:not([hidden])) {
  grid-template-columns: 1fr 2fr;
}

.btn {
  display: inline-grid;
  place-items: center;
  grid-auto-flow: column;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-md);
  min-block-size: 48px;
  border: none;
  border-radius: var(--radius-lg);
  font: inherit;
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-sm);
  cursor: pointer;
  transition:
    background var(--duration-fast) var(--ease-out),
    transform var(--duration-fast) var(--ease-out),
    opacity var(--duration-fast);
}

.btn:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

.btn:active:not(:disabled) {
  transform: scale(0.98);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Skip button - secondary style */
.skip-btn {
  background: var(--surface-2);
  color: var(--text-muted);
  border: 1px solid var(--border);
}

.skip-btn:hover:not(:disabled) {
  background: var(--surface-1);
  border-color: color-mix(in oklch, var(--border) 70%, var(--text-muted));
}

/* Check button - primary style */
.check-btn {
  background: var(--primary);
  color: white;
}

.check-btn:hover:not(:disabled) {
  background: var(--primary-hover);
}

/* Next button - success style */
.next-btn {
  background: var(--correct);
  color: white;
}

.next-btn:hover:not(:disabled) {
  background: color-mix(in oklch, var(--correct) 85%, black);
}

/* ================================================
   SCORE DISPLAY
   ================================================ */
.score-display {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
  text-align: center;
}

.score-value {
  font-weight: var(--font-weight-bold);
  color: var(--correct);
}

.score-total {
  font-weight: var(--font-weight-medium);
}

/* ================================================
   DARK MODE ADJUSTMENTS
   ================================================ */
@media (prefers-color-scheme: dark) {
  .option::before {
    background: var(--surface-3);
  }

  .game-card {
    border-color: color-mix(in oklch, var(--border) 80%, transparent);
  }
}

/* ================================================
   RESPONSIVE - Container query based
   ================================================ */
@container game-content (min-width: 600px) {
  .game-card .translation {
    font-size: var(--font-size-3xl);
  }
}