/**
 * Embedded Linux Curriculum Stylesheet
 * 
 * Clean, Minimalist & Linear/Vercel Engineering Design
 * Fully aligned with the main theme tokens and style.css
 *
 * @package EmirCebiMinimal
 */

/* ==========================================================================
   1. PAGE CONTAINER & BASE
   ========================================================================== */
.curriculum-page {
  padding-top: 1rem;
  padding-bottom: 5rem;
}

.curriculum-header {
  animation: heroEntrance 0.7s cubic-bezier(0.16, 1, 0.3, 1) both;
}

.btn-sm {
  padding: 0.4rem 0.8rem !important;
  font-size: 0.8125rem !important;
}

/* ==========================================================================
   2. CURRICULUM ACCORDION CARDS
   ========================================================================== */
.curriculum-list {
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
}

.curriculum-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  overflow: hidden;
}

.curriculum-card:hover {
  border-color: var(--border-hover);
  background-color: var(--bg-surface-hover);
}

.curriculum-card.is-open {
  border-color: rgba(255, 255, 255, 0.2);
}

/* Card Header */
.curriculum-card-header {
  display: flex;
  align-items: flex-start;
  gap: 1.125rem;
  padding: 1.25rem 1.35rem;
  cursor: pointer;
  user-select: none;
}

.curriculum-num-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background-color: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  flex-shrink: 0;
  transition: all var(--transition-fast);
}

.curriculum-card.is-open .curriculum-num-badge {
  background-color: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
  border-color: rgba(255, 255, 255, 0.2);
}

.curriculum-header-info {
  flex-grow: 1;
  min-width: 0;
}

.curriculum-title-line {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.35rem;
  flex-wrap: wrap;
}

.curriculum-module-title {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
  letter-spacing: -0.015em;
}

.curriculum-module-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.55;
  margin-bottom: 0.625rem;
}

.curriculum-meta-line {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.meta-dot {
  color: var(--border-subtle);
}

.curriculum-chevron {
  color: var(--text-muted);
  padding-top: 0.25rem;
  flex-shrink: 0;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), color var(--transition-fast);
}

.curriculum-card.is-open .curriculum-chevron {
  transform: rotate(180deg);
  color: var(--text-primary);
}

/* Status Badges */
.badge-published {
  color: #4ade80 !important;
  background-color: rgba(74, 222, 128, 0.06) !important;
  border-color: rgba(74, 222, 128, 0.2) !important;
}

.badge-progress {
  color: #fbbf24 !important;
  background-color: rgba(251, 191, 36, 0.06) !important;
  border-color: rgba(251, 191, 36, 0.2) !important;
}

.badge-upcoming {
  color: var(--text-muted) !important;
}

/* ==========================================================================
   3. LESSON LIST
   ========================================================================== */
.curriculum-card-body {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.curriculum-body-inner {
  overflow: hidden;
  border-top: 1px solid var(--border-subtle);
}

.curriculum-card.is-open .curriculum-card-body {
  grid-template-rows: 1fr;
}

.curriculum-lessons {
  list-style: none;
  padding: 0;
  margin: 0;
}

.curriculum-lesson-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.875rem 1.35rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  transition: background-color var(--transition-fast);
}

.curriculum-lesson-item:last-child {
  border-bottom: none;
}

.curriculum-lesson-item:hover {
  background-color: rgba(255, 255, 255, 0.02);
}

.lesson-main {
  display: flex;
  align-items: flex-start;
  gap: 0.875rem;
  flex-grow: 1;
  min-width: 0;
}

.lesson-code {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  flex-shrink: 0;
  margin-top: 0.15rem;
  min-width: 32px;
}

.lesson-details {
  flex-grow: 1;
  min-width: 0;
}

.lesson-title-row {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  margin-bottom: 0.2rem;
}

.lesson-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
  line-height: 1.5;
}

.lesson-link:hover {
  color: #ffffff;
  text-decoration: underline;
}

.lesson-text-disabled {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.lesson-badges {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.lesson-duration {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--text-muted);
}

.lesson-action-btn-wrap {
  flex-shrink: 0;
}

/* ==========================================================================
   4. RESPONSIVE ADJUSTMENTS
   ========================================================================== */
@media (max-width: 768px) {
  .curriculum-page {
    padding-top: 0.5rem;
  }

  .curriculum-card-header {
    padding: 1rem;
    gap: 0.75rem;
  }

  .curriculum-num-badge {
    width: 30px;
    height: 30px;
    font-size: 0.75rem;
  }

  .curriculum-lesson-item {
    flex-direction: column;
    align-items: flex-start;
    padding: 0.75rem 1rem;
    gap: 0.625rem;
  }

  .lesson-action-btn-wrap {
    width: 100%;
    padding-left: 2.75rem;
  }
}

.curriculum-header { animation:none; } .curriculum-card-header:focus-visible { outline:2px solid var(--accent-muted); outline-offset:-3px; } .curriculum-card.is-open { border-color:var(--border-hover); } .lesson-link:hover { color:var(--text-primary); } @media(prefers-reduced-motion:reduce) { .curriculum-card-body,.curriculum-chevron { transition:none; } }
html:not(.js) .curriculum-card-body { grid-template-rows:1fr; }