/* ========================================================
   WebDev Learning Hub — Component Design System
   Visual Personality & Micro-Interactions (150–350ms)
   ======================================================== */

/* Navigation Items */
.nav-section-title {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  padding: 0.75rem 0.75rem 0.25rem;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 0.85rem;
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  font-weight: 500;
  font-size: 0.92rem;
  font-family: var(--font-sans);
  transition: all var(--duration-fast) var(--ease-smooth);
  margin-bottom: 2px;
  position: relative;
}

.nav-item:hover {
  background-color: var(--color-surface-hover);
  color: var(--color-primary);
  transform: translateX(3px);
}

.nav-item.active {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  font-weight: 600;
}

.nav-item.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 15%;
  bottom: 15%;
  width: 3px;
  border-radius: 0 4px 4px 0;
  background: var(--color-primary);
}

.nav-item i {
  font-size: 1.1rem;
  width: 20px;
  text-align: center;
  transition: transform var(--duration-fast) var(--ease-smooth);
}

.nav-item:hover i {
  transform: scale(1.1);
}

.nav-badge-phase {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  padding: 0.15rem 0.45rem;
  background-color: #f1f5f9;
  color: #64748b;
  border-radius: var(--radius-xs);
  margin-left: auto;
}

/* Modern Card with Micro-Interactions */
.app-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: transform var(--duration-normal) var(--ease-smooth),
              box-shadow var(--duration-normal) var(--ease-smooth),
              border-color var(--duration-normal) ease;
  overflow: hidden;
}

.app-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: rgba(13, 148, 136, 0.22);
}

.app-card-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: #fff;
}

.app-card-title {
  font-family: var(--font-sans);
  font-size: 1.05rem;
  font-weight: 700;
  margin: 0;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.app-card-body {
  padding: 1.5rem;
}

/* Stat Cards */
.stat-card {
  padding: 1rem 1.15rem;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  gap: 1rem;
  box-shadow: var(--shadow-sm);
  transition: transform var(--duration-normal) var(--ease-smooth),
              box-shadow var(--duration-normal) var(--ease-smooth),
              border-color var(--duration-normal) ease;
}

.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: rgba(13, 148, 136, 0.25);
}

.stat-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
  transition: transform var(--duration-fast) var(--ease-smooth);
}

.stat-card:hover .stat-icon,
.app-card:hover .stat-icon {
  transform: scale(1.08);
}

.stat-icon.primary {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
}

.stat-icon.success {
  background-color: var(--color-success-light);
  color: var(--color-success);
}

.stat-icon.warning {
  background-color: var(--color-warning-light);
  color: var(--color-warning);
}

.stat-icon.info {
  background-color: var(--color-info-light);
  color: var(--color-info);
}

.stat-value {
  font-family: var(--font-sans);
  font-size: 1.75rem;
  font-weight: 800;
  line-height: 1.2;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.stat-label {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  font-weight: 500;
}

/* Buttons with Soft Lift & Micro-Interactions (150–250ms) */
.btn {
  font-family: var(--font-sans);
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: transform var(--duration-fast) var(--ease-smooth),
              box-shadow var(--duration-fast) var(--ease-smooth),
              background-color var(--duration-fast) ease,
              border-color var(--duration-fast) ease,
              color var(--duration-fast) ease;
}

.btn i {
  display: inline-block;
  transition: transform var(--duration-fast) var(--ease-smooth);
}

.btn:hover i.bi-arrow-right,
.btn:hover i.bi-chevron-right,
.btn:hover i.bi-box-arrow-in-right,
.btn:hover i.bi-box-arrow-up-right,
.btn:hover i.bi-play-fill {
  transform: translateX(3px);
}

.btn:active {
  transform: translateY(0) scale(0.98);
}

.btn-primary-custom {
  background-color: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 0.55rem 1.2rem;
  font-weight: 600;
  font-size: 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: transform var(--duration-fast) var(--ease-smooth),
              box-shadow var(--duration-fast) var(--ease-smooth),
              background-color var(--duration-fast) ease;
  box-shadow: 0 2px 6px rgba(13, 148, 136, 0.16);
}

.btn-primary-custom:hover {
  background-color: var(--color-primary-hover);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(13, 148, 136, 0.25);
}

.btn-primary-custom:hover i {
  transform: translateX(2px);
}

.btn-primary {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(13, 148, 136, 0.25);
}

/* Form Controls with Modern Focus Glow */
.form-label {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--color-text);
  margin-bottom: 0.4rem;
}

.form-control,
.form-select {
  font-family: var(--font-sans);
  font-size: 0.92rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  padding: 0.6rem 0.9rem;
  transition: border-color var(--duration-fast) ease,
              box-shadow var(--duration-fast) ease,
              background-color var(--duration-fast) ease;
}

.form-control::placeholder {
  color: #94a3b8;
  font-size: 0.88rem;
}

.form-control:focus,
.form-select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-glow);
  outline: none;
}

.form-text {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: 0.35rem;
}

/* Status Badges */
.badge-status {
  padding: 0.35rem 0.65rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--font-sans);
}

.badge-status.active {
  background-color: var(--color-success-light);
  color: #065f46;
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.badge-status.inactive {
  background-color: var(--color-danger-light);
  color: #991b1b;
  border: 1px solid rgba(239, 68, 68, 0.25);
}

.badge-status.upcoming {
  background-color: #f1f5f9;
  color: #475569;
  border: 1px solid rgba(148, 163, 184, 0.25);
}

/* Breadcrumbs */
.app-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 1.25rem;
  padding: 0;
  list-style: none;
  font-family: var(--font-sans);
}

.app-breadcrumb li {
  display: inline-flex;
  align-items: center;
  list-style-type: none;
}

.app-breadcrumb a {
  color: var(--color-text-secondary);
}

.app-breadcrumb a:hover {
  color: var(--color-primary);
}

/* Developer Tool Code Badges */
.code-tag {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-xs);
  background-color: #f1f5f9;
  color: #0f172a;
  border: 1px solid #e2e8f0;
}

.code-tag.teal {
  background-color: rgba(13, 148, 136, 0.1);
  color: #0f766e;
  border-color: rgba(13, 148, 136, 0.2);
}

.code-tag.sky {
  background-color: rgba(56, 189, 248, 0.12);
  color: #0369a1;
  border-color: rgba(56, 189, 248, 0.25);
}

.code-tag.emerald {
  background-color: rgba(16, 185, 129, 0.1);
  color: #065f46;
  border-color: rgba(16, 185, 129, 0.2);
}

/* Code Snippet Window Styling */
.code-window-bar {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 1rem;
  background-color: #03151e;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.code-window-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

.code-window-dot.red { background-color: #ef4444; }
.code-window-dot.yellow { background-color: #f59e0b; }
.code-window-dot.green { background-color: #10b981; }

.code-window-title {
  margin-left: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: #94a3b8;
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 3rem 1.5rem;
}

.empty-state-icon {
  width: 64px;
  height: 64px;
  background-color: #f1f5f9;
  color: var(--color-text-muted);
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  margin-bottom: 1rem;
}

.empty-state-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 0.35rem;
}

.empty-state-text {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  max-width: 400px;
  margin: 0 auto 1.25rem;
  line-height: var(--lh-relaxed);
}

/* Tables */
.app-table-container {
  overflow-x: auto;
  border-radius: var(--radius-md);
}

.app-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 0.9rem;
  font-family: var(--font-sans);
}

.app-table th {
  background-color: #f8fafc;
  color: var(--color-text-secondary);
  font-weight: 600;
  text-align: left;
  padding: 0.65rem 0.85rem;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.app-table td {
  padding: 0.7rem 0.85rem;
  border-bottom: 1px solid var(--color-border);
  vertical-align: middle;
  color: var(--color-text);
  line-height: var(--lh-normal);
}

.app-table tbody tr:hover td {
  background-color: #f8fafc;
}

/* User Avatar */
.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
}

/* Accessibility: Prefers Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  .app-card,
  .stat-card,
  .btn,
  .btn i,
  .nav-item,
  .nav-item i,
  .stat-icon {
    transition: none !important;
    transform: none !important;
  }
}