/* ============================================================
   Hafıza Kartları — styles.css
   Uses design tokens from ../design/design-system.css with
   safe fallbacks in case a token name differs.
   ============================================================ */

:root {
  --mc-canvas: var(--canvas, #F7F5F1);
  --mc-surface: var(--surface, #FFFFFF);
  --mc-ink: var(--ink, #1E1B16);
  --mc-muted: var(--muted, #6B6459);
  --mc-accent: var(--accent, #E8552D);
  --mc-accent-ink: var(--accent-ink, #FFFFFF);
  --mc-success: var(--success, #2F8F5B);
  --mc-border: var(--border, #E2DDD3);
  --mc-radius: var(--radius, 14px);
  --mc-radius-sm: var(--radius-sm, 8px);
  --mc-shadow: var(--shadow, 0 4px 14px rgba(30, 27, 22, 0.08));
  --mc-font-sans: var(--font-sans, 'Inter', system-ui, sans-serif);
  --mc-font-display: var(--font-display, 'Inter', system-ui, sans-serif);
  --mc-gap: 1rem;
}

[data-theme="dark"] {
  --mc-canvas: var(--canvas-dark, #1A1712);
  --mc-surface: var(--surface-dark, #24201A);
  --mc-ink: var(--ink-dark, #F3EFE8);
  --mc-muted: var(--muted-dark, #B2A997);
  --mc-border: var(--border-dark, #3A342A);
  --mc-shadow: 0 4px 18px rgba(0, 0, 0, 0.5);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--mc-canvas);
  color: var(--mc-ink);
  font-family: var(--mc-font-sans);
  transition: background 0.3s ease, color 0.3s ease;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ===== Header ===== */
.app-header {
  text-align: center;
  padding: 2rem 1rem 1rem;
}

.app-title {
  font-family: var(--mc-font-display);
  font-size: 2rem;
  margin: 0 0 0.25rem;
  color: var(--mc-ink);
}

.app-subtitle {
  margin: 0;
  color: var(--mc-muted);
  font-size: 1rem;
}

/* ===== Main layout ===== */
.app-main {
  flex: 1;
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 1rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--mc-gap);
}

.panel {
  background: var(--mc-surface);
  border: 1px solid var(--mc-border);
  border-radius: var(--mc-radius);
  box-shadow: var(--mc-shadow);
  padding: 1.25rem;
}

.panel-title {
  margin: 0 0 0.75rem;
  font-size: 1.1rem;
  font-family: var(--mc-font-display);
}

/* ===== Difficulty panel ===== */
.difficulty-options {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.difficulty-btn {
  flex: 1 1 100px;
  min-width: 100px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  padding: 0.75rem 1rem;
  border: 2px solid var(--mc-border);
  background: var(--mc-canvas);
  color: var(--mc-ink);
  border-radius: var(--mc-radius-sm);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease, transform 0.15s ease;
}

.difficulty-btn:hover {
  border-color: var(--mc-accent);
  transform: translateY(-1px);
}

.difficulty-btn.active {
  background: var(--mc-accent);
  border-color: var(--mc-accent);
  color: var(--mc-accent-ink);
}

.diff-sub {
  font-size: 0.75rem;
  font-weight: 400;
  opacity: 0.8;
}

/* ===== Stats panel ===== */
.stats-panel {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
}

.stat-box {
  display: flex;
  flex-direction: column;
  min-width: 100px;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--mc-muted);
}

.stat-value {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--mc-ink);
}

/* ===== Buttons ===== */
.btn-primary,
.btn-secondary {
  cursor: pointer;
  border-radius: var(--mc-radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.65rem 1.25rem;
  border: 2px solid transparent;
  transition: background 0.2s ease, transform 0.15s ease, border-color 0.2s ease;
}

.btn-primary {
  background: var(--mc-accent);
  color: var(--mc-accent-ink);
  margin-left: auto;
}

.btn-primary:hover {
  transform: translateY(-1px);
  filter: brightness(1.05);
}

.btn-secondary {
  background: transparent;
  color: var(--mc-ink);
  border-color: var(--mc-border);
}

.btn-secondary:hover {
  border-color: var(--mc-accent);
  color: var(--mc-accent);
}

/* ===== Board panel & cards ===== */
.board-panel {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(60px, 1fr));
  gap: 0.6rem;
  width: 100%;
  max-width: 560px;
  margin: 0 auto;
}

.card {
  position: relative;
  aspect-ratio: 3 / 4;
  perspective: 800px;
  cursor: pointer;
}

.card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.5s cubic-bezier(.2,.7,.3,1);
  transform-style: preserve-3d;
}

.card.flipped .card-inner,
.card.matched .card-inner {
  transform: rotateY(180deg);
}

.card-face {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--mc-radius-sm);
  backface-visibility: hidden;
  font-size: 1.6rem;
  border: 2px solid var(--mc-border);
}

.card-front {
  background: var(--mc-surface);
  color: var(--mc-accent);
}

.card-back {
  background: var(--mc-accent);
  color: var(--mc-accent-ink);
  transform: rotateY(180deg);
}

.card.matched .card-front {
  border-color: var(--mc-success);
  box-shadow: 0 0 0 2px var(--mc-success) inset;
}

.card:focus-visible {
  outline: 3px solid var(--mc-accent);
  outline-offset: 2px;
  border-radius: var(--mc-radius-sm);
}

.win-message {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--mc-success);
  text-align: center;
  margin: 0;
}

.win-message[hidden] {
  display: none;
}

/* ===== History panel ===== */
.score-list {
  list-style: none;
  margin: 0 0 1rem;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  max-height: 220px;
  overflow-y: auto;
}

.score-list li {
  display: flex;
  justify-content: space-between;
  padding: 0.6rem 0.8rem;
  border: 1px solid var(--mc-border);
  border-radius: var(--mc-radius-sm);
  background: var(--mc-canvas);
  font-size: 0.9rem;
}

.empty-state {
  color: var(--mc-muted);
  justify-content: center;
  font-style: italic;
}

/* ===== Footer ===== */
.app-footer {
  text-align: center;
  padding: 1.25rem 1rem 2rem;
  color: var(--mc-muted);
  font-size: 0.85rem;
}

/* ===== Focus states (global) ===== */
a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid var(--mc-accent);
  outline-offset: 2px;
}

/* ===== Responsive breakpoints ===== */
@media (max-width: 640px) {
  .app-title { font-size: 1.5rem; }

  .stats-panel {
    flex-direction: column;
    align-items: stretch;
  }

  .btn-primary { margin-left: 0; width: 100%; }

  .card-grid {
    grid-template-columns: repeat(3, minmax(50px, 1fr));
  }

  .difficulty-options { flex-direction: column; }
}

@media (min-width: 641px) and (max-width: 900px) {
  .card-grid {
    grid-template-columns: repeat(4, minmax(55px, 1fr));
  }
}

@media (min-width: 901px) {
  .card-grid {
    grid-template-columns: repeat(5, minmax(60px, 1fr));
  }
}

/* ===== Reduced motion ===== */
@media (prefers-reduced-motion: reduce) {
  .card-inner,
  .difficulty-btn,
  .btn-primary,
  .btn-secondary {
    transition: none !important;
  }
}