@import url('../../shared/css/variables.css');

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Helvetica Neue', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ─── Layout ─── */
#app {
  display: flex;
  min-height: 100vh;
}

/* ─── Sidebar ─── */
.sidebar {
  width: 240px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--card-border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
}

.sidebar-brand {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--card-border);
}

.logo {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  text-decoration: none;
}

.logo em {
  font-style: normal;
  color: var(--primary);
}

.sidebar-nav {
  flex: 1;
  padding: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.55rem 0.75rem;
  color: var(--text-primary);
  text-decoration: none;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 600;
  transition: background 0.15s, color 0.15s;
}

.nav-item svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.nav-item:hover {
  background: rgba(0, 0, 0, 0.035);
  color: var(--text-primary);
}

.nav-item.active {
  background: var(--primary-glow);
  color: var(--primary);
}

.theme-toggle svg { width: 18px; height: 18px; }

body.dark-mode .topbar {
  background: rgba(15, 36, 64, 0.92);
  border-bottom-color: rgba(255, 255, 255, 0.06);
}

body.dark-mode .sidebar {
  border-right-color: rgba(255, 255, 255, 0.06);
}

body.dark-mode .user-menu {
  border-color: rgba(255, 255, 255, 0.08);
}

.sidebar-footer {
  padding: 0.75rem;
  border-top: 1px solid var(--card-border);
}

/* ─── Main Area ─── */
.main-area {
  flex: 1;
  margin-left: 240px;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ─── Topbar ─── */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  border-bottom: 1px solid var(--card-border);
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  position: sticky;
  top: 0;
  z-index: 50;
}

.topbar-left h1 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.topbar-sub {
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-top: 1px;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.user-menu {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  cursor: pointer;
  padding: 0.25rem 0.5rem 0.25rem 0.25rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--card-border);
  transition: background 0.15s;
}

.user-menu:hover { background: rgba(0, 0, 0, 0.025); }

.user-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-inverse);
}

.user-name {
  font-size: 0.82rem;
  color: var(--text-primary);
  font-weight: 500;
}

/* ─── Main Content ─── */
main {
  padding: 2rem;
  flex: 1;
}

/* ─── Stats Row ─── */
.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.stat-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  box-shadow: var(--shadow-sm);
}

.stat-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--stat-color) 10%, transparent);
  color: var(--stat-color);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.stat-icon svg { width: 20px; height: 20px; }

.stat-value {
  display: block;
  font-size: 1.4rem;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

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

/* ─── Section Header ─── */
.section-header {
  margin-bottom: 1.25rem;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
}

.section-header h2 {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.section-header p {
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-top: 2px;
}

.view-all {
  font-size: 0.82rem;
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
}

/* ─── Course Grid ─── */
#course-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.25rem;
}

.course-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow var(--duration) var(--ease), transform var(--duration) var(--ease);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
}

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

.course-card-img {
  height: 120px;
  background: linear-gradient(135deg, var(--primary-light), var(--primary));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 2rem;
  font-weight: 700;
  position: relative;
}

.course-badges {
  position: absolute;
  top: 8px;
  right: 8px;
  display: flex;
  gap: 4px;
  flex-direction: row;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.course-badge {
  background: var(--gold, #FFD700);
  color: #1a202c;
  font-size: 0.6rem;
  font-weight: 700;
  padding: 0.15rem 0.4rem;
  border-radius: 3px;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  white-space: nowrap;
}

.course-card-body {
  padding: 1rem 1.25rem;
}

.course-card-body h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.3rem;
  letter-spacing: -0.01em;
}

.course-card-body p {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.course-card-footer {
  padding: 0.75rem 1.25rem;
  border-top: 1px solid var(--card-border);
  display: flex;
  align-items: center;
  gap: 1rem;
}

.course-progress { flex: 1; }

.progress-bar {
  height: 4px;
  background: rgba(0, 0, 0, 0.06);
  border-radius: 4px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--primary);
  border-radius: 4px;
  transition: width 0.5s var(--ease);
}

.progress-label {
  font-size: 0.72rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

.course-meta {
  font-size: 0.72rem;
  color: var(--text-tertiary);
  white-space: nowrap;
}

/* ─── Continue Learning Button ─── */
.continue-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-glow);
  padding: 0.3rem 0.8rem;
  border-radius: var(--radius-pill);
  text-decoration: none;
  transition: background 0.15s;
}

.continue-btn:hover { background: var(--accent-glow); }

/* ─── Catalog Section ─── */
.catalog-section {
  margin-top: 3rem;
}

/* ─── Coming Soon Grid ─── */
.coming-soon-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
}

.coming-soon-card {
  background: var(--card-bg);
  border: 1px dashed var(--card-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  opacity: 0.7;
  transition: opacity var(--duration) var(--ease);
}

.coming-soon-card:hover { opacity: 0.9; }

.coming-soon-badge {
  display: inline-block;
  padding: 0.15rem 0.6rem;
  border-radius: var(--radius-pill);
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  background: var(--bg-tertiary);
  color: var(--text-tertiary);
  margin-bottom: 0.75rem;
}

.coming-soon-card h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.3rem;
  letter-spacing: -0.01em;
}

.coming-soon-date {
  font-size: 0.78rem;
  color: var(--text-tertiary);
  margin-bottom: 0.75rem;
}

.coming-soon-card .btn-disabled {
  display: inline-block;
  padding: 0.3rem 0.8rem;
  border-radius: var(--radius-pill);
  font-size: 0.72rem;
  font-weight: 600;
  background: var(--bg-tertiary);
  color: var(--text-tertiary);
  cursor: not-allowed;
}

/* ─── Case Study Grid ─── */
.case-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}

.case-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--duration) var(--ease), transform var(--duration) var(--ease);
}

.case-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.case-card-industry {
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--primary);
  margin-bottom: 0.4rem;
}

.case-card h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
  letter-spacing: -0.01em;
}

.case-card-meta {
  font-size: 0.78rem;
  color: var(--text-tertiary);
  margin-bottom: 0.75rem;
}

.case-card-score {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-pill);
  font-size: 0.68rem;
  font-weight: 600;
  background: var(--gold-light);
  color: #B8860B;
  margin-bottom: 0.75rem;
}

.case-card-actions {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.case-card .btn-case {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius-pill);
  font-size: 0.78rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.15s;
  background: var(--primary);
  color: white;
  text-decoration: none;
}

.case-card .btn-case:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.case-card .btn-case-secondary {
  background: var(--bg);
  color: var(--text-primary);
  border: 1px solid var(--card-border);
}

.case-card .btn-case-secondary:hover {
  background: var(--primary-glow);
  border-color: var(--primary);
  color: var(--primary);
}

/* ─── Case Empty State ─── */
.case-empty {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-tertiary);
  font-size: 0.88rem;
  grid-column: 1 / -1;
}

/* ─── Responsive ─── */
@media (max-width: 768px) {
  .sidebar { width: 56px; }

  .sidebar-brand { padding: 1rem 0.75rem; }

  .sidebar-brand .logo { font-size: 0; }
  .sidebar-brand .logo::first-letter { font-size: 1.35rem; }

  .sidebar-nav .nav-item span,
  .sidebar-footer .nav-item span { display: none; }

  .sidebar-nav .nav-item,
  .sidebar-footer .nav-item { justify-content: center; padding: 0.55rem; }

  .main-area { margin-left: 56px; }

  .topbar { padding: 0.75rem 1rem; }

  main { padding: 1rem; }

  .stats-row { grid-template-columns: repeat(2, 1fr); }

  #course-grid { grid-template-columns: 1fr; }
}