/* ============================================================
   COMPONENTS.CSS — Shared UI Components
   ============================================================
   
   HOW THIS FILE WORKS:
   --------------------
   This file styles every REUSABLE component that appears on
   multiple pages: sidebar, cards, buttons, badges, etc.
   
   It is imported by EVERY page alongside global.css.
   Page-specific styles go in their own CSS file (e.g. home.css).
   
   ESSENTIAL-TO-KNOW:
   - The Sidebar is styled here but its HTML is INJECTED by
     JavaScript (global.js). This means if you edit the sidebar
     structure, edit it in global.js, not in the HTML files.
   - All components use the CSS variables from global.css,
     so theme switching (dark/light) automatically applies.
   ============================================================ */


/* ============================================================
   SIDEBAR
   ============================================================
   
   The sidebar uses:
   - position: fixed → stays visible while scrolling
   - backdrop-filter: blur → glassmorphism effect
   - flexbox column → stacks logo, nav links, and bottom toggle
   
   On mobile, it slides in from the left via the .open class.
   ============================================================ */

.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--color-sidebar);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border-right: var(--glass-border);
  box-shadow: var(--glass-shadow);
  display: flex;
  flex-direction: column;
  z-index: 999;
  transition: transform var(--transition-normal), background var(--transition-normal);
  overflow-y: auto;
}

/* ── Sidebar Logo ─ */
.sidebar-brand {
  padding: var(--space-lg) var(--space-lg) var(--space-md);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.sidebar-brand .brand-icon {
  width: 42px;
  height: 42px;
  background: var(--gradient-primary);
  border-radius: var(--border-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.sidebar-brand .brand-icon svg {
  width: 24px;
  height: 24px;
  stroke: white;
  fill: none;
  stroke-width: 2;
}

.sidebar-brand .brand-text h2 {
  font-size: 1.15rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.2;
}

.sidebar-brand .brand-text span {
  font-size: 0.7rem;
  color: var(--color-text-muted);
  font-weight: 500;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}


/* ── Sidebar Navigation ─ */
.sidebar-nav {
  flex: 1;
  padding: var(--space-sm) var(--space-md);
}

.sidebar-nav .nav-section-label {
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 1.2px;
  padding: var(--space-lg) var(--space-sm) var(--space-sm);
}

.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: 12px 14px;
  border-radius: var(--border-radius-sm);
  color: var(--color-text-secondary);
  font-weight: 500;
  font-size: 0.9rem;
  transition: all var(--transition-fast);
  position: relative;
  margin-bottom: 2px;
}

.sidebar-nav a svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
  transition: stroke var(--transition-fast);
}

.sidebar-nav a:hover {
  background: var(--color-border);
  color: var(--color-text);
}

/* Active state — highlight the current page */
.sidebar-nav a.active {
  background: linear-gradient(135deg, rgba(79,70,229,0.12) 0%, rgba(6,182,212,0.08) 100%);
  color: var(--color-primary);
  font-weight: 600;
}

.sidebar-nav a.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 8px;
  width: 3px;
  background: var(--gradient-primary);
  border-radius: 0 4px 4px 0;
}

[data-theme="dark"] .sidebar-nav a.active {
  background: linear-gradient(135deg, rgba(79,70,229,0.2) 0%, rgba(6,182,212,0.1) 100%);
  color: var(--color-primary-light);
}


/* ── Sidebar Footer (Theme Toggle) ─ */
.sidebar-footer {
  padding: var(--space-md) var(--space-lg) var(--space-lg);
  border-top: var(--glass-border);
}

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  border-radius: var(--border-radius-sm);
  background: var(--color-border);
  cursor: pointer;
  transition: background var(--transition-fast);
  width: 100%;
}

.theme-toggle:hover {
  background: rgba(79, 70, 229, 0.15);
}

.theme-toggle .toggle-label {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-secondary);
}

.theme-toggle .toggle-label svg {
  width: 18px;
  height: 18px;
  stroke: var(--color-text-secondary);
  fill: none;
  stroke-width: 2;
}

/* The sliding pill toggle */
.toggle-switch {
  width: 44px;
  height: 24px;
  background: var(--color-text-muted);
  border-radius: 12px;
  position: relative;
  transition: background var(--transition-fast);
}

.toggle-switch::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 18px;
  height: 18px;
  background: white;
  border-radius: 50%;
  transition: transform var(--transition-fast);
  box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

[data-theme="dark"] .toggle-switch {
  background: var(--color-primary);
}

[data-theme="dark"] .toggle-switch::after {
  transform: translateX(20px);
}


/* ── Mobile: Sidebar hidden by default, slides in with .open ─ */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.open {
    transform: translateX(0);
    animation: slideInLeft 0.3s ease-out;
  }
}


/* ============================================================
   GLASS CARD — The primary content container
   ============================================================ */

.glass-card {
  background: var(--color-surface);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: var(--glass-border);
  border-radius: var(--border-radius);
  box-shadow: var(--glass-shadow);
  padding: var(--space-lg);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-normal);
}

.glass-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(79, 70, 229, 0.12);
}

.glass-card.no-hover:hover {
  transform: none;
  box-shadow: var(--glass-shadow);
}


/* ============================================================
   BUTTONS
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 10px 24px;
  border-radius: var(--border-radius-sm);
  font-weight: 600;
  font-size: 0.9rem;
  transition: all var(--transition-fast);
  border: none;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: 0 4px 14px rgba(79, 70, 229, 0.35);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(79, 70, 229, 0.45);
}

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border: var(--glass-border);
  backdrop-filter: blur(8px);
}

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

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary);
  color: white;
}

.btn-sm {
  padding: 6px 14px;
  font-size: 0.8rem;
}

.btn-lg {
  padding: 14px 32px;
  font-size: 1rem;
}

/* Button ripple effect */
.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle, rgba(255,255,255,0.3) 0%, transparent 70%);
  opacity: 0;
  transform: scale(0);
  transition: transform 0.5s, opacity 0.3s;
}

.btn:active::after {
  transform: scale(2.5);
  opacity: 1;
  transition: 0s;
}


/* ============================================================
   BADGES & TAGS
   ============================================================ */

.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.3px;
}

.badge-primary {
  background: rgba(79, 70, 229, 0.12);
  color: var(--color-primary);
}

.badge-success {
  background: rgba(16, 185, 129, 0.12);
  color: var(--color-success);
}

.badge-danger {
  background: rgba(239, 68, 68, 0.12);
  color: var(--color-danger);
}

.badge-warning {
  background: rgba(245, 158, 11, 0.12);
  color: var(--color-accent);
}


/* ============================================================
   STAT CARDS
   ============================================================ */

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

.stat-card .stat-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--border-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-md);
}

.stat-card .stat-icon svg {
  width: 28px;
  height: 28px;
  stroke: white;
  fill: none;
  stroke-width: 2;
}

.stat-card .stat-number {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1;
  margin-bottom: var(--space-xs);
}

.stat-card .stat-label {
  font-size: 0.82rem;
  color: var(--color-text-secondary);
  font-weight: 500;
}


/* ============================================================
   PAGE HEADER
   ============================================================ */

.page-header {
  margin-bottom: var(--space-xl);
}

.page-header h1 {
  font-size: 1.8rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: var(--space-xs);
}

.page-header p {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

@media (max-width: 768px) {
  .page-header h1 {
    font-size: 1.4rem;
  }
}


/* ============================================================
   SECTION PLACEHOLDER (for pages not yet built)
   ============================================================ */

.page-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  min-height: 60vh;
  gap: var(--space-lg);
}

.page-placeholder .placeholder-icon {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: float 3s ease-in-out infinite;
}

.page-placeholder .placeholder-icon svg {
  width: 48px;
  height: 48px;
  stroke: white;
  fill: none;
  stroke-width: 1.5;
}

.page-placeholder h2 {
  font-size: 1.8rem;
  font-weight: 700;
}

.page-placeholder p {
  color: var(--color-text-secondary);
  max-width: 450px;
  line-height: 1.7;
}


/* ============================================================
   SCROLLBAR CUSTOMIZATION
   ============================================================ */

::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--color-text-muted);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-secondary);
}