/* ===========================================
   CleanOS Academy — Components
   =========================================== */

/* ===== Sidebar ===== */
.sidebar {
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-light);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  z-index: 100;
  transition: var(--transition-base);
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-8);
}

.sidebar-logo-icon {
  width: 48px;
  height: 48px;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
}

.sidebar-logo-text {
  font-size: var(--font-size-xl);
  font-weight: 800;
}

.sidebar-logo-text span {
  color: var(--color-primary-light);
}

.sidebar-nav {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  transition: var(--transition-base);
}

.sidebar-link:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
}

.sidebar-link.active {
  background: var(--gradient-primary);
  color: white;
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.3);
}

.sidebar-link-icon {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}

.sidebar-link-text {
  font-weight: 500;
}

.sidebar-footer {
  padding-top: var(--space-6);
  border-top: 1px solid var(--border-light);
}

.sidebar-user {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  transition: var(--transition-base);
}

.sidebar-user:hover {
  background: rgba(255, 255, 255, 0.05);
}

.sidebar-avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

.sidebar-user-info {
  flex: 1;
}

.sidebar-user-name {
  font-weight: 600;
  font-size: var(--font-size-sm);
}

.sidebar-user-role {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
}

/* ===== Header ===== */
.header {
  position: fixed;
  top: 0;
  left: var(--sidebar-width);
  right: 0;
  height: var(--header-height);
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-8);
  z-index: 90;
  transition: var(--transition-base);
}

.header-search {
  position: relative;
  width: 320px;
}

.header-search-input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  padding-left: 44px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-full);
  color: var(--text-primary);
  font-size: var(--font-size-sm);
  transition: var(--transition-base);
}

.header-search-input::placeholder {
  color: var(--text-muted);
}

.header-search-input:focus {
  outline: none;
  border-color: var(--color-primary);
  background: rgba(255, 255, 255, 0.08);
}

.header-search-icon {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.header-notification {
  position: relative;
}

.header-notification-badge {
  position: absolute;
  top: -4px;
  right: -4px;
  width: 18px;
  height: 18px;
  background: var(--color-danger);
  border-radius: var(--radius-full);
  font-size: 10px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ===== Hero Section ===== */
.hero {
  padding: var(--space-12) var(--space-8);
  border-radius: var(--radius-xl);
  background: var(--gradient-primary);
  position: relative;
  overflow: hidden;
  margin-bottom: var(--space-8);
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 60%;
  height: 200%;
  background: radial-gradient(ellipse, rgba(255,255,255,0.1) 0%, transparent 60%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.hero-text {
  max-width: 500px;
}

.hero-title {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  margin-bottom: var(--space-4);
  line-height: 1.1;
}

.hero-subtitle {
  font-size: var(--font-size-lg);
  opacity: 0.9;
  margin-bottom: var(--space-6);
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.hero-progress {
  text-align: center;
}

.hero-progress-circle {
  width: 140px;
  height: 140px;
  position: relative;
}

.hero-progress-circle svg {
  transform: rotate(-90deg);
}

.hero-progress-circle circle {
  fill: none;
  stroke-width: 10;
}

.hero-progress-circle .bg {
  stroke: rgba(255, 255, 255, 0.2);
}

.hero-progress-circle .fill {
  stroke: white;
  stroke-linecap: round;
  stroke-dasharray: 408;
  stroke-dashoffset: calc(408 - (408 * var(--progress, 0)) / 100);
  transition: stroke-dashoffset 1.5s ease;
}

.hero-progress-value {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: var(--font-size-3xl);
  font-weight: 800;
}

.hero-progress-label {
  margin-top: var(--space-2);
  font-size: var(--font-size-sm);
  opacity: 0.8;
}

/* ===== Module Cards ===== */
.modules-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  margin-bottom: var(--space-8);
}

.module-card {
  padding: var(--space-8);
  cursor: pointer;
}

.module-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: var(--space-6);
}

.module-card-icon {
  width: 64px;
  height: 64px;
  background: var(--gradient-primary);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
}

.module-card-number {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  font-weight: 600;
}

.module-card-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.module-card-description {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-6);
  line-height: 1.6;
}

.module-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.module-card-progress {
  flex: 1;
  margin-right: var(--space-4);
}

.module-card-progress-text {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  margin-bottom: var(--space-2);
}

.module-card-btn {
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-sm);
}

/* ===== Stats Cards ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
  margin-bottom: var(--space-8);
}

.stat-card {
  padding: var(--space-6);
  text-align: center;
}

.stat-card-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto var(--space-4);
  background: rgba(99, 102, 241, 0.1);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
}

.stat-card-value {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  margin-bottom: var(--space-1);
}

.stat-card-label {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
}

/* ===== Quick Actions ===== */
.quick-actions {
  display: flex;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.quick-action-card {
  flex: 1;
  padding: var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-4);
  cursor: pointer;
}

.quick-action-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
}

.quick-action-icon.tests {
  background: rgba(245, 158, 11, 0.15);
  color: var(--color-warning);
}

.quick-action-icon.podcasts {
  background: rgba(139, 92, 246, 0.15);
  color: var(--color-secondary);
}

.quick-action-icon.resources {
  background: rgba(16, 185, 129, 0.15);
  color: var(--color-success);
}

.quick-action-text h4 {
  font-size: var(--font-size-base);
  margin-bottom: var(--space-1);
}

.quick-action-text p {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
}

/* ===== Section Headers ===== */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-6);
}

.section-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
}

/* ===== Mobile Sidebar Toggle ===== */
.mobile-menu-btn {
  display: none;
}

@media (max-width: 1199px) {
  .sidebar-link-text,
  .sidebar-logo-text,
  .sidebar-user-info {
    display: none;
  }
  
  .sidebar {
    width: var(--sidebar-collapsed);
    padding: var(--space-4);
    align-items: center;
  }
  
  .sidebar-link {
    justify-content: center;
    padding: var(--space-3);
  }
  
  .sidebar-avatar {
    margin: 0 auto;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 767px) {
  .sidebar {
    transform: translateX(-100%);
    width: 280px;
  }
  
  .sidebar.open {
    transform: translateX(0);
  }
  
  .sidebar-link-text,
  .sidebar-logo-text,
  .sidebar-user-info {
    display: block;
  }
  
  .header {
    left: 0;
    padding: 0 var(--space-4);
  }
  
  .mobile-menu-btn {
    display: flex;
  }
  
  .header-search {
    display: none;
  }
  
  .modules-grid {
    grid-template-columns: 1fr;
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
  }
  
  .quick-actions {
    flex-direction: column;
  }
  
  .hero-content {
    flex-direction: column;
    text-align: center;
  }
  
  .hero-stats {
    margin-top: var(--space-6);
  }
}

/* ===== Sidebar Overlay ===== */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 99;
}

.sidebar-overlay.show {
  display: block;
}