/* courses catalog page styles
   extracted from css/styles.css and css/landing.css */

/* ============================================== */
/* from styles.css -- learn page course grid */
/* ============================================== */

.course-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
}

@media (min-width: 600px) {
    .course-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 900px) {
    .course-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.course-card {
    display: flex;
    flex-direction: column;
    padding: var(--spacing-sm);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    text-decoration: none;
    color: var(--color-text);
    transition: all var(--transition-smooth);
}

.course-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

html.dark .course-card {
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(255, 255, 255, 0.08);
}

html.dark .course-card:hover {
    background: rgba(255, 255, 255, 0.07);
}

.course-card-header {
    display: flex;
    gap: 0.35rem;
    margin-bottom: 0.5rem;
    flex-wrap: wrap;
}

.course-card-name {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.15rem;
}

.course-card-aliases {
    font-size: 0.72rem;
    color: var(--color-text-muted);
    font-style: italic;
    margin-bottom: 0.35rem;
}

.course-card-summary {
    font-size: 0.82rem;
    color: var(--color-text-muted);
    line-height: 1.5;
    flex: 1;
    margin-bottom: 0.75rem;
}

.course-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 0.5rem;
    border-top: 1px solid var(--color-border);
}

.course-card-price {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-primary);
    font-family: var(--font-mono);
}

.course-card-preview {
    font-size: 0.7rem;
    color: var(--color-text-muted);
}

/* ============================================== */
/* from landing.css -- courses catalog page */
/* ============================================== */

.courses-hero {
  padding: 140px 40px 80px;
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
}

.courses-hero .section-title {
  margin-bottom: 20px;
}

.courses-hero-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.courses-hero-clusters {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 24px;
}

.courses-hero-clusters-label {
  font-size: 0.82rem;
  color: var(--text-secondary);
  font-weight: 500;
  text-transform: lowercase;
  letter-spacing: 0.01em;
}

.courses-hero-cluster-link {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 100px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.82rem;
  font-weight: 500;
  text-decoration: none;
  letter-spacing: 0.01em;
  transition: all var(--transition-fast);
}

.courses-hero-cluster-link:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
}

.courses-filters {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  padding: 0 40px 48px;
  max-width: 900px;
  margin: 0 auto;
}

.courses-filter-btn {
  padding: 8px 18px;
  border-radius: 100px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-transform: lowercase;
}

.courses-filter-btn:hover {
  border-color: var(--border-hover);
  color: var(--text-primary);
  background: var(--bg-hover);
}

.courses-filter-btn.active {
  border-color: var(--accent);
  background: var(--accent-dim);
  color: var(--accent);
}



.courses-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  padding: 0 40px 100px;
  max-width: 1200px;
  margin: 0 auto;
}

/* landing page course card (glassmorphism variant) */
.course-card {
  position: relative;
  border-radius: 24px;
  background: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.06) 0%,
    rgba(255, 255, 255, 0.02) 50%,
    rgba(255, 255, 255, 0.04) 100%
  );
  border: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  box-shadow:
    0 8px 32px rgba(0, 0, 0, 0.18),
    inset 0 1px 0 rgba(255, 255, 255, 0.15);
  overflow: hidden;
  cursor: pointer;
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 0.5s cubic-bezier(0.25, 0.1, 0.25, 1),
    transform 0.5s cubic-bezier(0.25, 0.1, 0.25, 1),
    box-shadow var(--transition-fast),
    border-color var(--transition-fast);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 28px 26px;
  gap: 16px;
  text-decoration: none;
  color: inherit;
}

.course-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.3),
    transparent
  );
  pointer-events: none;
}

[data-theme="light"] .course-card {
  background: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.7) 0%,
    rgba(255, 255, 255, 0.45) 50%,
    rgba(255, 255, 255, 0.55) 100%
  );
  border: 1px solid rgba(255, 255, 255, 0.6);
  box-shadow:
    0 8px 32px rgba(0, 0, 0, 0.06),
    inset 0 1px 0 rgba(255, 255, 255, 0.8);
}

.course-card.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.course-card.is-visible:hover {
  transform: translateY(-4px);
  box-shadow:
    0 16px 48px rgba(0, 0, 0, 0.25),
    inset 0 1px 0 rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.2);
}

[data-theme="light"] .course-card.is-visible:hover {
  box-shadow:
    0 16px 48px rgba(0, 0, 0, 0.1),
    inset 0 1px 0 rgba(255, 255, 255, 1);
  border-color: rgba(255, 255, 255, 0.8);
}

/* hero and filter entrance animations */
.courses-hero,
.courses-filters,
.courses-count {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 0.6s cubic-bezier(0.25, 0.1, 0.25, 1),
    transform 0.6s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.courses-hero.is-visible,
.courses-filters.is-visible,
.courses-count.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.courses-filters { transition-delay: 100ms; }
.courses-count { transition-delay: 200ms; }

.course-card-top {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.course-card-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.course-card-badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 100px;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  line-height: 1.4;
}

.course-card-badge--category {
  background: var(--tag-bg);
  border: 1px solid var(--tag-border);
  color: var(--text-secondary);
}

.course-card-badge--tier1 {
  background: rgba(34, 197, 94, 0.12);
  border: 1px solid rgba(34, 197, 94, 0.2);
  color: #22c55e;
}

.course-card-badge--tier2 {
  background: rgba(59, 130, 246, 0.12);
  border: 1px solid rgba(59, 130, 246, 0.2);
  color: #3b82f6;
}

.course-card-badge--tier3 {
  background: rgba(245, 158, 11, 0.12);
  border: 1px solid rgba(245, 158, 11, 0.2);
  color: #f59e0b;
}

.course-card-badge--tier4 {
  background: rgba(239, 68, 68, 0.12);
  border: 1px solid rgba(239, 68, 68, 0.2);
  color: #ef4444;
}

.course-card-name {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.3;
}

.course-card-aliases {
  font-size: 0.76rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.course-card-bottom {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.course-card-summary {
  font-size: 0.78rem;
  color: var(--text-secondary);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.course-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 8px;
  border-top: 1px solid var(--border);
}

.course-card-amino {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-weight: 500;
}

.course-card-arrow {
  width: 16px;
  height: 16px;
  color: var(--accent);
  opacity: 0;
  transform: translateX(-4px);
  transition: all var(--transition-fast);
}

.course-card:hover .course-card-arrow {
  opacity: 1;
  transform: translateX(0);
}

/* coming soon ribbon + greyed out state */

.course-card--coming-soon {
  cursor: default;
  pointer-events: none;
  opacity: 0.45;
  filter: grayscale(0.6);
}

.course-card--coming-soon.is-visible:hover {
  transform: none;
  box-shadow:
    0 8px 32px rgba(0, 0, 0, 0.18),
    inset 0 1px 0 rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.1);
}

.course-card-ribbon {
  position: absolute;
  top: 16px;
  right: -32px;
  padding: 4px 40px;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: var(--accent, #34d399);
  color: #000;
  transform: rotate(35deg);
  z-index: 2;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.courses-count {
  text-align: center;
  padding: 0 40px 32px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.courses-count strong {
  color: var(--accent);
  font-weight: 600;
}

/* ============================================== */
/* credit status banner                          */
/* ============================================== */

.courses-credit-banner {
  max-width: 1200px;
  margin: 0 auto 24px;
  padding: 0 40px;
}

.credit-banner-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 20px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(52, 211, 153, 0.06), rgba(52, 211, 153, 0.02));
  border: 1px solid rgba(52, 211, 153, 0.15);
}

.credit-banner-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.credit-banner-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: rgba(52, 211, 153, 0.12);
  color: var(--accent, #34d399);
  flex-shrink: 0;
}

.credit-banner-icon svg {
  width: 16px;
  height: 16px;
}

.credit-banner-text {
  font-size: 0.85rem;
  color: var(--text-secondary, #a3a3a3);
}

.credit-banner-text strong {
  color: var(--accent, #34d399);
  font-weight: 600;
}

.credit-banner-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 8px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent, #34d399);
  border: 1px solid rgba(52, 211, 153, 0.2);
  background: rgba(52, 211, 153, 0.06);
  text-decoration: none;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.credit-banner-cta:hover {
  background: rgba(52, 211, 153, 0.12);
  border-color: rgba(52, 211, 153, 0.3);
}

.credit-banner-cta svg {
  width: 12px;
  height: 12px;
}

/* ============================================== */
/* course card access states (border-based)       */
/* ============================================== */

/* locked: dashed grey border, greyed out ("missing piece" feel) */
.course-card--locked {
  border: 1.5px dashed rgba(255, 255, 255, 0.12);
  opacity: 0.6;
  filter: grayscale(0.3);
}

.course-card--locked.is-visible:hover {
  border-color: rgba(255, 255, 255, 0.22);
  opacity: 0.75;
  filter: grayscale(0.15);
}

[data-theme="light"] .course-card--locked {
  border: 1.5px dashed rgba(0, 0, 0, 0.12);
}

[data-theme="light"] .course-card--locked.is-visible:hover {
  border-color: rgba(0, 0, 0, 0.22);
}

/* unlockable: dashed green border (credit available) */
.course-card--unlockable {
  border: 1.5px dashed var(--accent);
}

.course-card--unlockable.is-visible:hover {
  border-color: var(--accent-hover);
  box-shadow:
    0 16px 48px rgba(0, 0, 0, 0.25),
    inset 0 1px 0 rgba(255, 255, 255, 0.2),
    0 0 12px var(--accent-glow);
}

[data-theme="light"] .course-card--unlockable {
  border: 1.5px dashed var(--accent);
}

[data-theme="light"] .course-card--unlockable.is-visible:hover {
  box-shadow:
    0 16px 48px rgba(0, 0, 0, 0.1),
    inset 0 1px 0 rgba(255, 255, 255, 1),
    0 0 12px var(--accent-glow);
}

/* unlocked: solid green border + subtle green tint */
.course-card--unlocked {
  border: 1.5px solid var(--accent);
  background: linear-gradient(
    135deg,
    rgba(52, 211, 153, 0.06) 0%,
    rgba(255, 255, 255, 0.02) 50%,
    rgba(52, 211, 153, 0.04) 100%
  );
  box-shadow:
    0 8px 32px rgba(0, 0, 0, 0.18),
    inset 0 1px 0 rgba(255, 255, 255, 0.15),
    0 0 12px var(--accent-glow);
}

.course-card--unlocked.is-visible:hover {
  box-shadow:
    0 16px 48px rgba(0, 0, 0, 0.25),
    inset 0 1px 0 rgba(255, 255, 255, 0.2),
    0 0 20px var(--accent-glow);
  border-color: var(--accent-hover);
}

[data-theme="light"] .course-card--unlocked {
  border: 1.5px solid var(--accent);
  background: linear-gradient(
    135deg,
    rgba(16, 185, 129, 0.06) 0%,
    rgba(255, 255, 255, 0.45) 50%,
    rgba(16, 185, 129, 0.04) 100%
  );
  box-shadow:
    0 8px 32px rgba(0, 0, 0, 0.06),
    inset 0 1px 0 rgba(255, 255, 255, 0.8),
    0 0 12px var(--accent-glow);
}

[data-theme="light"] .course-card--unlocked.is-visible:hover {
  box-shadow:
    0 16px 48px rgba(0, 0, 0, 0.1),
    inset 0 1px 0 rgba(255, 255, 255, 1),
    0 0 20px var(--accent-glow);
}

/* completed: gold prestige border + gold tint */
.course-card--completed {
  border: 1.5px solid var(--gold);
  background: linear-gradient(
    135deg,
    rgba(245, 158, 11, 0.06) 0%,
    rgba(255, 255, 255, 0.02) 50%,
    rgba(245, 158, 11, 0.04) 100%
  );
  box-shadow:
    0 8px 32px rgba(0, 0, 0, 0.18),
    inset 0 1px 0 rgba(255, 255, 255, 0.15),
    0 0 12px var(--gold-glow);
}

.course-card--completed.is-visible:hover {
  box-shadow:
    0 16px 48px rgba(0, 0, 0, 0.25),
    inset 0 1px 0 rgba(255, 255, 255, 0.2),
    0 0 20px var(--gold-glow);
  border-color: var(--gold-hover);
}

[data-theme="light"] .course-card--completed {
  border: 1.5px solid var(--gold);
  background: linear-gradient(
    135deg,
    rgba(217, 119, 6, 0.06) 0%,
    rgba(255, 255, 255, 0.45) 50%,
    rgba(217, 119, 6, 0.04) 100%
  );
  box-shadow:
    0 8px 32px rgba(0, 0, 0, 0.06),
    inset 0 1px 0 rgba(255, 255, 255, 0.8),
    0 0 12px var(--gold-glow);
}

[data-theme="light"] .course-card--completed.is-visible:hover {
  box-shadow:
    0 16px 48px rgba(0, 0, 0, 0.1),
    inset 0 1px 0 rgba(255, 255, 255, 1),
    0 0 20px var(--gold-glow);
}

/* gold progress bar fill on completed cards */
.course-card--completed .course-card-progress-fill {
  background: var(--gold);
}

/* progress bar on unlocked cards */
.course-card-progress {
  margin-top: 4px;
}

.course-card-progress-bar {
  height: 3px;
  border-radius: 3px;
  background: var(--border, rgba(255, 255, 255, 0.08));
  overflow: hidden;
  margin-bottom: 4px;
}

.course-card-progress-fill {
  height: 100%;
  border-radius: 3px;
  background: var(--accent, #34d399);
  transition: width 0.5s ease;
}

.course-card-progress-text {
  font-size: 0.68rem;
  color: var(--text-muted, rgba(255, 255, 255, 0.4));
}

/* unlock confirm modal overlay */
.courses-unlock-modal {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal-backdrop, 999);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  opacity: 0;
  transition: opacity 0.2s ease;
}

.courses-unlock-modal.is-visible {
  opacity: 1;
}

.courses-unlock-card {
  max-width: 420px;
  width: 100%;
  padding: 32px 28px;
  border-radius: 20px;
  background: var(--bg-primary, #0a0a0a);
  border: 1px solid rgba(52, 211, 153, 0.2);
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.5);
  text-align: center;
  transform: scale(0.95) translateY(8px);
  transition: transform 0.25s ease;
}

.courses-unlock-modal.is-visible .courses-unlock-card {
  transform: scale(1) translateY(0);
}

[data-theme="light"] .courses-unlock-card {
  background: #fff;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.15);
}

.courses-unlock-card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(52, 211, 153, 0.1);
  color: var(--accent, #34d399);
  margin-bottom: 14px;
}

.courses-unlock-card-icon svg {
  width: 24px;
  height: 24px;
}

.courses-unlock-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text, #fafafa);
}

.courses-unlock-card p {
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--text-secondary, #a3a3a3);
  margin-bottom: 20px;
}

.courses-unlock-card-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.courses-unlock-card-confirm {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 10px;
  font-size: 0.88rem;
  font-weight: 600;
  color: #000;
  background: var(--accent, #34d399);
  border: none;
  cursor: pointer;
  transition: opacity 0.15s ease;
}

.courses-unlock-card-confirm:hover {
  opacity: 0.9;
}

.courses-unlock-card-confirm:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.courses-unlock-card-confirm svg {
  width: 16px;
  height: 16px;
}

.courses-unlock-card-cancel {
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-muted, rgba(255, 255, 255, 0.5));
  background: transparent;
  border: none;
  cursor: pointer;
  transition: color 0.15s ease;
}

.courses-unlock-card-cancel:hover {
  color: var(--text, #fafafa);
}

.courses-unlock-card-note {
  font-size: 0.72rem;
  color: var(--text-muted, rgba(255, 255, 255, 0.4));
  margin-top: 8px;
  margin-bottom: 0;
}

/* responsive -- from landing.css @media blocks */

@media (max-width: 1024px) {
  .courses-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .courses-credit-banner {
    padding: 0 24px;
  }

  .credit-banner-inner {
    flex-direction: column;
    text-align: center;
    gap: 10px;
  }

  .courses-hero {
    padding: 120px 24px 40px;
  }

  .courses-filters {
    padding: 0 24px 32px;
  }

  .courses-grid {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 0 24px 80px;
  }

  .course-card {
    padding: 24px 22px;
  }

  .course-card-name {
    font-size: 1rem;
  }

  .course-card-summary {
    -webkit-line-clamp: 2;
  }

  .courses-count {
    padding: 0 24px 24px;
  }
}

@media (max-width: 480px) {
  .courses-hero {
    padding: 100px 20px 32px;
  }

  .courses-filters {
    padding: 0 20px 24px;
    gap: 6px;
  }

  .courses-grid {
    padding: 0 20px 60px;
  }

  .course-card {
    padding: 18px;
  }

  .course-card-name {
    font-size: 0.95rem;
  }

  .courses-count {
    padding: 0 20px 20px;
  }
}