/* ═══════════════════════════════════════════════════════════
   PROGRESSIONS PAGE — Deck grid, card viewer, navigation
   ═══════════════════════════════════════════════════════════ */

/* Layout */
.progressions-layout {
  min-height: 500px;
}

.view {
  display: none;
}

.view.active {
  display: block;
}

/* Deck list view */
#deck-list-view {
  padding: 28px 40px 80px;
}

.deck-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  max-width: 1200px;
  margin: 0 auto;
}

/* Deck card */
.deck-card {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 20px;
  cursor: pointer;
  transition: background 0.15s, transform 0.15s, box-shadow 0.15s;
  text-decoration: none;
  color: var(--text);
  display: block;
  position: relative;
}

.deck-card:hover {
  background: var(--surface-3);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.deck-card:focus {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

.deck-card-header {
  margin-bottom: 12px;
}

.deck-card-title {
  font-family: 'Jost', sans-serif;
  font-weight: 600;
  font-size: 18px;
  color: var(--text);
  letter-spacing: 1px;
  margin-bottom: 6px;
}

.deck-card-count {
  font-family: 'Jost', sans-serif;
  font-size: 12px;
  color: var(--text-muted);
  font-style: italic;
  letter-spacing: 1px;
  text-transform: lowercase;
}

.deck-card-description {
  font-family: 'Jost', sans-serif;
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
}

/* Card viewer view */
#card-viewer {
  padding: 20px 40px 80px;
}

.viewer-header {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.back-btn {
  font-family: 'Jost', sans-serif;
  font-weight: 500;
  font-size: 13px;
  letter-spacing: 1px;
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: transparent;
  color: var(--text);
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  flex-shrink: 0;
}

.back-btn:hover {
  background: var(--surface-2);
}

.back-btn:focus {
  outline: none;
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--focus) 20%, transparent);
}

.viewer-info {
  flex: 1;
  min-width: 200px;
}

.viewer-deck-title {
  font-family: 'Jost', sans-serif;
  font-weight: 600;
  font-size: 20px;
  color: var(--accent);
  letter-spacing: 1px;
  margin-bottom: 4px;
}

.viewer-progression-info {
  font-family: 'Jost', sans-serif;
  font-size: 13px;
  color: var(--text-muted);
  letter-spacing: 0.5px;
}

/* Card container */
.card-container {
  perspective: 1000px;
  margin: 0 auto;
  max-width: 800px;
  min-height: 400px;
  position: relative;
}

.card-face {
  backface-visibility: hidden;
  transition: transform 0.4s ease, opacity 0.2s;
  position: absolute;
  width: 100%;
  height: 100%;
  padding: 40px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface-2);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
}

.front {
  transform: rotateY(0deg);
}

.back {
  transform: rotateY(180deg);
  opacity: 0;
  pointer-events: none;
}

.card-container.flipped .front {
  transform: rotateY(180deg);
  opacity: 0;
  pointer-events: none;
}

.card-container.flipped .back {
  transform: rotateY(360deg);
  opacity: 1;
  pointer-events: auto;
}

/* Card front */
.card-chord-sequence {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 30px;
  min-height: 120px;
}

.chord-in-sequence {
  font-family: 'Jost', sans-serif;
  font-weight: 700;
  font-size: clamp(24px, 4vw, 48px);
  color: var(--text);
  letter-spacing: 2px;
  padding: 12px 20px;
  border: 2px solid var(--accent);
  border-radius: 6px;
  background: var(--surface);
}

.card-roman {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 24px;
  font-family: 'Jost', sans-serif;
  font-weight: 500;
  font-size: 16px;
  color: var(--text-muted);
  letter-spacing: 1px;
}

.roman-item {
  padding: 6px 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
}

.card-pattern-name {
  text-align: center;
  font-family: 'Jost', sans-serif;
  font-weight: 500;
  font-size: 15px;
  color: var(--text-muted);
  font-style: italic;
  letter-spacing: 1px;
  padding: 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
}

/* Card back */
.diagram-strip {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.diagram-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.diagram-wrapper svg {
  display: block;
}

.chord-label-above {
  font-family: 'Jost', sans-serif;
  font-weight: 600;
  font-size: 14px;
  color: var(--text);
  letter-spacing: 1px;
}

.scale-tones-section {
  text-align: center;
}

.scale-tones-title {
  font-family: 'Jost', sans-serif;
  font-weight: 500;
  font-size: 12px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.scale-tones-grid {
  display: flex;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
}

.scale-tone {
  font-family: monospace;
  font-weight: 500;
  font-size: 16px;
  padding: 8px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text);
}

/* Card controls */
.card-controls {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  margin-top: 24px;
  flex-wrap: wrap;
}

.control-btn {
  font-family: 'Jost', sans-serif;
  font-weight: 500;
  font-size: 13px;
  letter-spacing: 1px;
  padding: 10px 20px;
  min-height: 44px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: transparent;
  color: var(--text);
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.control-btn:hover {
  background: var(--surface-2);
}

.control-btn:focus {
  outline: none;
  border-color: var(--focus);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--focus) 20%, transparent);
}

.control-btn[aria-pressed="true"] {
  background: var(--accent);
  color: var(--accent-text);
  border-color: var(--accent);
}

.step-controls {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
}

.step-btn {
  padding: 10px 24px;
}

.step-counter {
  font-family: 'Jost', sans-serif;
  font-weight: 500;
  font-size: 13px;
  color: var(--text-muted);
  letter-spacing: 1px;
  padding: 10px 16px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 4px;
}

/* Responsive */
@media (max-width: 600px) {
  #deck-list-view {
    padding: 20px 16px 80px;
  }

  .deck-grid {
    grid-template-columns: 1fr;
  }

  #card-viewer {
    padding: 20px 16px 80px;
  }

  .viewer-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .card-container {
    padding: 24px 16px;
  }

  .card-face {
    padding: 24px 16px;
  }

  .chord-in-sequence {
    font-size: 28px;
    padding: 8px 12px;
  }

  .card-controls {
    flex-direction: column;
    gap: 12px;
  }

  .step-controls {
    flex-direction: column;
    gap: 10px;
  }

  .step-btn {
    width: 100%;
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .card-face {
    transition: none;
  }

  .card-container.flipped .front,
  .card-container.flipped .back {
    opacity: 1;
    pointer-events: auto;
    transform: none;
  }

  .card-container:not(.flipped) .back {
    opacity: 0;
    pointer-events: none;
    position: absolute;
  }
}