/* ============================================
   WatuLMS - Modern Learning Management System
   Beautiful, responsive, mobile-first design
   Color palette derived from WatuLMS logo
   ============================================ */

/* ----- CSS Custom Properties ----- */
:root {
  /* Primary palette - from logo */
  --color-primary: #1a1f36;
  --color-primary-light: #2d3250;
  --color-primary-dark: #0f1225;
  --color-primary-rgb: 26, 31, 54;

  /* Accent - vibrant cyan/teal from logo */
  --color-accent: #00b8d4;
  --color-accent-hover: #0097a7;
  --color-accent-light: rgba(0, 184, 212, 0.08);
  --color-accent-rgb: 0, 184, 212;

  /* Secondary - warm orange/gold from logo */
  --color-gold: #ff9800;
  --color-gold-hover: #f57c00;
  --color-gold-light: rgba(255, 152, 0, 0.08);

  /* Tertiary - green from logo */
  --color-green: #4caf50;
  --color-green-hover: #388e3c;
  --color-green-light: rgba(76, 175, 80, 0.08);

  /* Gradient combos */
  --gradient-primary: linear-gradient(135deg, #1a1f36 0%, #2d3250 100%);
  --gradient-accent: linear-gradient(135deg, #00b8d4 0%, #0097a7 100%);
  --gradient-gold: linear-gradient(135deg, #ff9800 0%, #f57c00 100%);
  --gradient-hero: linear-gradient(135deg, #1a1f36 0%, #2d3250 50%, #1a2a3a 100%);
  --gradient-card: linear-gradient(180deg, rgba(0,184,212,0.03) 0%, rgba(255,255,255,0) 100%);
  --gradient-mesh: radial-gradient(at 20% 80%, rgba(0,184,212,0.15) 0%, transparent 50%), radial-gradient(at 80% 20%, rgba(255,152,0,0.1) 0%, transparent 50%);

  /* Semantic colors */
  --color-success: #4caf50;
  --color-success-bg: #e8f5e9;
  --color-success-border: #c8e6c9;
  --color-error: #f44336;
  --color-error-bg: #ffebee;
  --color-error-border: #ffcdd2;
  --color-warning: #ff9800;
  --color-warning-bg: #fff3e0;
  --color-warning-border: #ffe0b2;
  --color-info: #00b8d4;
  --color-info-bg: #e0f7fa;
  --color-info-border: #b2ebf2;

  /* Neutrals */
  --color-white: #ffffff;
  --color-gray-50: #f8fafc;
  --color-gray-100: #f1f5f9;
  --color-gray-200: #e2e8f0;
  --color-gray-300: #cbd5e1;
  --color-gray-400: #94a3b8;
  --color-gray-500: #64748b;
  --color-gray-600: #475569;
  --color-gray-700: #334155;
  --color-gray-800: #1e293b;
  --color-gray-900: #0f172a;
  --color-text: #1e293b;
  --color-text-secondary: #64748b;
  --color-text-muted: #94a3b8;
  --color-text-light: #ffffff;

  /* Surfaces */
  --color-body-bg: #f0f4f8;
  --color-surface: #ffffff;
  --color-surface-hover: #f8fafc;
  --color-border: #e2e8f0;
  --color-border-light: #f1f5f9;

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, sans-serif;
  --font-display: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.5rem;
  --font-size-5xl: 3rem;
  --line-height: 1.6;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* Layout */
  --container-max: 1280px;
  --container-wide: 1440px;
  --sidebar-width: 270px;

  /* Borders */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
  --shadow-inner: inset 0 2px 4px rgba(0, 0, 0, 0.04);
  --shadow-accent: 0 4px 14px rgba(0, 184, 212, 0.25);
  --shadow-gold: 0 4px 14px rgba(255, 152, 0, 0.25);
  --shadow-card-hover: 0 20px 40px -12px rgba(0, 0, 0, 0.12);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Touch target */
  --touch-min: 44px;
}


/* ----- Reset & Base ----- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height);
  color: var(--color-text);
  background-color: var(--color-body-bg);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-accent-hover);
}

ul, ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  color: var(--color-text);
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: -0.02em;
}

h1 { font-size: var(--font-size-3xl); margin-bottom: var(--space-lg); }
h2 { font-size: var(--font-size-2xl); margin-bottom: var(--space-md); }
h3 { font-size: var(--font-size-xl); margin-bottom: var(--space-md); }
h4 { font-size: var(--font-size-lg); margin-bottom: var(--space-sm); }

p {
  margin-bottom: var(--space-md);
  color: var(--color-text-secondary);
}

::selection {
  background-color: rgba(0, 184, 212, 0.2);
  color: var(--color-primary);
}


/* ----- Container ----- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-lg);
  padding-right: var(--space-lg);
}

.container-wide {
  max-width: var(--container-wide);
}


/* =============================================
   SITE HEADER
   ============================================= */
.site-header {
  background: var(--gradient-primary);
  color: var(--color-text-light);
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(20px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  gap: var(--space-lg);
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-xl);
  font-weight: 800;
  color: var(--color-text-light);
  text-decoration: none;
  white-space: nowrap;
  letter-spacing: -0.02em;
  flex-shrink: 0;
}

.logo:hover {
  color: var(--color-accent);
}

.logo img {
  height: 40px;
  width: auto;
}

.logo .logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.logo .logo-text strong {
  font-size: var(--font-size-xl);
  background: linear-gradient(135deg, #ffffff 0%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.logo .tagline {
  font-size: 0.65rem;
  font-weight: 400;
  color: var(--color-gray-400);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  display: none;
}

/* Main navigation */
.main-nav {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--color-primary);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  box-shadow: var(--shadow-xl);
  z-index: 999;
  padding: var(--space-sm) 0;
}

.main-nav.is-open {
  display: block;
}

.main-nav a {
  display: flex;
  align-items: center;
  padding: var(--space-md) var(--space-xl);
  color: var(--color-gray-300);
  font-size: var(--font-size-sm);
  font-weight: 500;
  min-height: var(--touch-min);
  transition: all var(--transition-fast);
  border-left: 3px solid transparent;
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--color-accent);
  background-color: rgba(0, 184, 212, 0.06);
  border-left-color: var(--color-accent);
}

/* Header actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

/* Language toggle */
.lang-toggle {
  display: flex;
  gap: 2px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-full);
  padding: 3px;
}

.lang-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 4px 12px;
  font-size: var(--font-size-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
  min-height: 28px;
  color: var(--color-gray-400);
  background: transparent;
  border: none;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.lang-badge:hover {
  color: var(--color-text-light);
}

.lang-badge.active {
  background: var(--gradient-accent);
  color: var(--color-white);
  box-shadow: var(--shadow-accent);
}

/* Notification bell */
.btn-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.08);
  color: var(--color-gray-300);
  transition: all var(--transition-fast);
  font-size: 1.1rem;
  border: none;
  cursor: pointer;
}

.btn-icon:hover {
  background: rgba(255, 255, 255, 0.15);
  color: var(--color-accent);
}

/* User menu */
.user-menu {
  position: relative;
}

.user-menu-btn {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 6px 14px 6px 8px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  color: var(--color-text-light);
  cursor: pointer;
  min-height: 40px;
  font-size: var(--font-size-sm);
  font-weight: 500;
  transition: all var(--transition-fast);
  font-family: var(--font-family);
}

.user-menu-btn:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.2);
}

.role-badge {
  display: inline-flex;
  padding: 2px 8px;
  font-size: 0.65rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  background: var(--color-accent);
  color: var(--color-white);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.user-dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: 240px;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-2xl);
  border: 1px solid var(--color-border);
  z-index: 1001;
  overflow: hidden;
  animation: dropdownIn 0.2s ease;
}

@keyframes dropdownIn {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

.user-dropdown.is-open {
  display: block;
}

.user-dropdown a {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 12px var(--space-lg);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  font-weight: 500;
  transition: all var(--transition-fast);
}

.user-dropdown a:hover {
  background-color: var(--color-accent-light);
  color: var(--color-accent);
}

.user-dropdown hr {
  border: none;
  height: 1px;
  background-color: var(--color-border-light);
  margin: var(--space-xs) 0;
}

/* Menu toggle (hamburger) */
.menu-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.08);
  border: none;
  border-radius: var(--radius-md);
  color: var(--color-text-light);
  cursor: pointer;
  font-size: 1.3rem;
  transition: all var(--transition-fast);
}

.menu-toggle:hover {
  background: rgba(255, 255, 255, 0.15);
}


/* =============================================
   BUTTONS
   ============================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 11px 24px;
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  font-weight: 600;
  line-height: 1.4;
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  min-height: var(--touch-min);
  text-decoration: none;
  transition: all var(--transition-fast);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.btn-primary {
  background: var(--gradient-accent);
  color: var(--color-white);
  border-color: transparent;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  color: var(--color-white);
  box-shadow: var(--shadow-accent);
  transform: translateY(-1px);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.btn-outline:hover {
  background: var(--gradient-accent);
  color: var(--color-white);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: var(--color-gray-100);
  color: var(--color-text);
  border-color: var(--color-gray-200);
}

.btn-secondary:hover {
  background-color: var(--color-gray-200);
  border-color: var(--color-gray-300);
}

.btn-danger {
  background-color: var(--color-error);
  color: var(--color-white);
  border-color: var(--color-error);
}

.btn-danger:hover {
  background-color: #d32f2f;
  border-color: #c62828;
  color: var(--color-white);
}

.btn-gold {
  background: var(--gradient-gold);
  color: var(--color-white);
  border-color: transparent;
  box-shadow: var(--shadow-sm);
}

.btn-gold:hover {
  background-color: var(--color-gold-hover);
  box-shadow: var(--shadow-gold);
  color: var(--color-white);
  transform: translateY(-1px);
}

.btn-success {
  background-color: var(--color-green);
  color: var(--color-white);
  border-color: var(--color-green);
}

.btn-success:hover {
  background-color: var(--color-green-hover);
  border-color: var(--color-green-hover);
  color: var(--color-white);
}

.btn-sm {
  padding: 7px 16px;
  font-size: var(--font-size-xs);
  min-height: 34px;
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 14px 32px;
  font-size: var(--font-size-base);
  min-height: 52px;
  border-radius: var(--radius-md);
}

.btn-block {
  display: flex;
  width: 100%;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
  transform: none !important;
}

.btn-icon-only {
  padding: 10px;
  min-width: var(--touch-min);
}


/* =============================================
   ALERTS
   ============================================= */
.alert {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-md);
  border-left: 4px solid transparent;
  margin-bottom: var(--space-lg);
  font-size: var(--font-size-sm);
  line-height: 1.5;
  position: relative;
  animation: alertSlideIn 0.3s ease;
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
}

@keyframes alertSlideIn {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

.alert-success {
  border-left-color: var(--color-success);
  background-color: var(--color-success-bg);
  color: #1b5e20;
}

.alert-error {
  border-left-color: var(--color-error);
  background-color: var(--color-error-bg);
  color: #b71c1c;
}

.alert-warning {
  border-left-color: var(--color-warning);
  background-color: var(--color-warning-bg);
  color: #e65100;
}

.alert-info {
  border-left-color: var(--color-info);
  background-color: var(--color-info-bg);
  color: #006064;
}

.alert-close {
  background: none;
  border: none;
  font-size: var(--font-size-xl);
  line-height: 1;
  cursor: pointer;
  opacity: 0.5;
  margin-left: auto;
  padding: 0 var(--space-xs);
  color: inherit;
  min-width: 32px;
  min-height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.alert-close:hover {
  opacity: 1;
  background: rgba(0, 0, 0, 0.05);
}

.alert.is-dismissing {
  animation: alertSlideOut 0.3s ease forwards;
}

@keyframes alertSlideOut {
  to { opacity: 0; transform: translateY(-8px); height: 0; padding: 0; margin: 0; overflow: hidden; }
}


/* =============================================
   FORMS
   ============================================= */
.form-group {
  margin-bottom: var(--space-lg);
}

.form-group label,
.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
}

.form-control,
.form-input,
.form-select,
.form-textarea {
  display: block;
  width: 100%;
  padding: 12px 16px;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  color: var(--color-text);
  background: var(--color-white);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  min-height: var(--touch-min);
}

.form-control:focus,
.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(0, 184, 212, 0.1);
}

.form-control::placeholder {
  color: var(--color-gray-400);
}

/* Ensure select dropdowns always show dark text on their white background */
select.form-control,
.filter-row select.form-control {
  color: #1a1f36;
}

select.form-control option {
  color: #1a1f36;
  background: #ffffff;
}

.form-control.is-invalid {
  border-color: var(--color-error);
  box-shadow: 0 0 0 3px rgba(244, 67, 54, 0.1);
}

.form-error {
  display: block;
  font-size: var(--font-size-xs);
  color: var(--color-error);
  margin-top: 4px;
  font-weight: 500;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

select.form-control {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2364748b' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 40px;
}


/* =============================================
   HERO SECTION - Landing Page
   ============================================= */
.hero-section {
  background: var(--gradient-hero);
  color: var(--color-text-light);
  padding: var(--space-4xl) 0;
  position: relative;
  overflow: hidden;
  margin: -1px calc(var(--space-lg) * -1) 0;
  width: calc(100% + var(--space-lg) * 2);
}

.hero-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-mesh);
  pointer-events: none;
}

.hero-section::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 80px;
  background: linear-gradient(to top, var(--color-body-bg), transparent);
}

.hero-content {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
  position: relative;
  z-index: 1;
  padding: 0 var(--space-lg);
}

.hero-logo {
  width: 80px;
  height: auto;
  margin: 0 auto var(--space-lg);
  filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.3));
}

.hero-content h1 {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: var(--space-md);
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.hero-content h1 .text-accent {
  background: linear-gradient(135deg, var(--color-accent), #4dd0e1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-content h1 .text-gold {
  background: linear-gradient(135deg, var(--color-gold), #ffb74d);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-tagline {
  font-size: var(--font-size-lg);
  color: var(--color-gray-300);
  margin-bottom: var(--space-xl);
  line-height: 1.6;
}

.hero-search {
  display: flex;
  max-width: 560px;
  margin: 0 auto var(--space-xl);
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.15);
  overflow: hidden;
  backdrop-filter: blur(10px);
  transition: all var(--transition-base);
}

.hero-search:focus-within {
  background: rgba(255, 255, 255, 0.15);
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(0, 184, 212, 0.15);
}

.hero-search .search-input {
  flex: 1;
  padding: 14px 20px;
  background: transparent;
  border: none;
  color: var(--color-white);
  font-size: var(--font-size-base);
  font-family: var(--font-family);
  outline: none;
}

.hero-search .search-input::placeholder {
  color: var(--color-gray-400);
}

.hero-search .btn {
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  padding: 14px 28px;
  margin: 4px;
  border-radius: var(--radius-md);
}

.hero-cta {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  gap: var(--space-2xl);
  justify-content: center;
  margin-top: var(--space-2xl);
  padding-top: var(--space-xl);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

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

.hero-stat-value {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  color: var(--color-accent);
}

.hero-stat-label {
  font-size: var(--font-size-xs);
  color: var(--color-gray-400);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}


/* =============================================
   SECTIONS
   ============================================= */
.section {
  padding: var(--space-3xl) 0;
}

.section-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xl);
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-xl);
  flex-wrap: wrap;
  gap: var(--space-md);
}

.section-cta {
  text-align: center;
  margin-top: var(--space-xl);
}


/* =============================================
   COURSE CARDS - Udemy-style
   ============================================= */
.course-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

.course-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
}

.course-card:hover,
.course-card.is-hovered {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
  border-color: rgba(0, 184, 212, 0.2);
}

.course-card-img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  background: linear-gradient(135deg, var(--color-gray-100), var(--color-gray-200));
}

.table-thumbnail {
  width: 64px;
  height: 44px;
  object-fit: cover;
  border-radius: 4px;
  display: block;
}

.preview-thumbnail {
  width: 100%;
  max-width: 240px;
  height: 140px;
  object-fit: cover;
  border-radius: 8px;
  display: block;
}

.enroll-course-img {
  width: 100%;
  max-width: 220px;
  height: 150px;
  object-fit: cover;
  border-radius: 8px;
  display: block;
}

.course-header-img {
  width: 100%;
  max-width: 320px;
  height: 200px;
  object-fit: cover;
  border-radius: 12px;
  display: block;
}

.learning-card-img {
  width: 100%;
  height: 140px;
  object-fit: cover;
  display: block;
}

.course-card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.course-card-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: linear-gradient(135deg, #1a1f36 0%, #232847 100%);
  position: relative;
  overflow: hidden;
}

.course-card-placeholder::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--placeholder-bg, linear-gradient(135deg, #0f2027, #203a43, #2c5364));
  opacity: 1;
}

.course-card-placeholder .placeholder-initials {
  position: relative;
  z-index: 1;
  font-size: 2.2rem;
  font-weight: 800;
  color: rgba(255,255,255,0.95);
  letter-spacing: 0.05em;
  line-height: 1;
  text-shadow: 0 2px 8px rgba(0,0,0,0.4);
}

.course-card-placeholder .placeholder-label {
  position: relative;
  z-index: 1;
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: rgba(255,255,255,0.55);
  text-align: center;
  padding: 0 12px;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Shimmer accent line at top */
.course-card-placeholder::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--placeholder-accent, #00b8d4);
  z-index: 2;
}

.course-card-body {
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  flex: 1;
}

.course-card-category {
  display: inline-block;
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: var(--space-sm);
}

.course-card-title {
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.course-card-title a {
  color: inherit;
}

.course-card-title a:hover {
  color: var(--color-accent);
}

.course-card-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.course-card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
  flex-wrap: wrap;
}

.course-card-trainer {
  font-weight: 600;
  color: var(--color-text-secondary);
}

.course-card-rating {
  display: flex;
  align-items: center;
  gap: 3px;
  color: var(--color-gold);
  font-weight: 700;
}

.course-card-rating .star {
  font-size: 0.8rem;
}

.course-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border-light);
}

.price-badge {
  font-size: var(--font-size-lg);
  font-weight: 800;
  color: var(--color-text);
}

.price-badge.price-free {
  color: var(--color-green);
  background: var(--color-green-light);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
}

.price-original {
  text-decoration: line-through;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  margin-left: var(--space-sm);
}

.price-display {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  color: var(--color-text);
}


/* =============================================
   CATEGORY CARDS
   ============================================= */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

.category-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  text-align: center;
  border: 1px solid var(--color-border-light);
  transition: all var(--transition-base);
  text-decoration: none;
  color: var(--color-text);
}

.category-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  color: var(--color-accent);
}

.category-icon {
  font-size: 2.5rem;
  display: block;
  margin-bottom: var(--space-md);
}

.category-card h3 {
  font-size: var(--font-size-base);
  margin-bottom: var(--space-xs);
}

.category-count {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}


/* =============================================
   FEATURES SECTION
   ============================================= */
.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

.feature-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  border: 1px solid var(--color-border-light);
  transition: all var(--transition-base);
  text-align: center;
}

.feature-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-lg);
}

.feature-icon {
  font-size: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  border-radius: var(--radius-lg);
  background: var(--color-accent-light);
  margin: 0 auto var(--space-md);
}

.feature-card h3 {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: var(--space-sm);
}

.feature-card p {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin: 0;
  line-height: 1.6;
}


/* =============================================
   WHY SECTION - Trust Badges
   ============================================= */
.why-section {
  background: var(--gradient-primary);
  color: var(--color-text-light);
  padding: var(--space-3xl) 0;
  margin: 0 calc(var(--space-lg) * -1);
  width: calc(100% + var(--space-lg) * 2);
}

.why-section .container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.why-section .section-title {
  color: var(--color-white);
  text-align: center;
}

.why-section .features-grid {
  max-width: 1000px;
  margin: 0 auto;
}

.why-section .feature-card {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
}

.why-section .feature-card:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--color-accent);
}

.why-section .feature-card h3 {
  color: var(--color-white);
}

.why-section .feature-card p {
  color: var(--color-gray-300);
}

.why-section .feature-icon {
  background: rgba(0, 184, 212, 0.15);
}


/* =============================================
   AUTH PAGES
   ============================================= */
.auth-section {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: calc(100vh - 200px);
  padding: var(--space-xl) 0;
}

.auth-card {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  width: 100%;
  max-width: 440px;
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--color-border-light);
}

.auth-card-wide {
  max-width: 580px;
}

.auth-card .auth-logo {
  display: flex;
  justify-content: center;
  margin-bottom: var(--space-xl);
}

.auth-card .auth-logo img {
  height: 56px;
  width: auto;
}

.auth-title {
  text-align: center;
  font-size: var(--font-size-2xl);
  font-weight: 800;
  margin-bottom: var(--space-xl);
  color: var(--color-primary);
}

.auth-links {
  text-align: center;
  margin-top: var(--space-lg);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.auth-links a {
  font-weight: 600;
}

.auth-divider {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin: var(--space-xl) 0;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

.auth-divider::before,
.auth-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-border);
}


/* =============================================
   SIDEBAR
   ============================================= */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: var(--color-surface);
  border-right: 1px solid var(--color-border-light);
  z-index: 1100;
  transform: translateX(-100%);
  transition: transform var(--transition-base);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  box-shadow: var(--shadow-xl);
}

.sidebar.is-open {
  transform: translateX(0);
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg);
  border-bottom: 1px solid var(--color-border-light);
  min-height: 68px;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  color: var(--color-text);
}

.sidebar-brand img {
  height: 32px;
  width: auto;
}

.sidebar-brand strong {
  font-size: var(--font-size-lg);
  font-weight: 800;
  color: var(--color-primary);
}

.sidebar-brand-sub {
  display: block;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  font-weight: 400;
}

.sidebar-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--color-gray-100);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: 1.2rem;
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}

.sidebar-close:hover {
  background: var(--color-gray-200);
  color: var(--color-text);
}

.sidebar-nav {
  flex: 1;
  padding: var(--space-md);
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: 10px 14px;
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  min-height: 42px;
  margin-bottom: 2px;
  text-decoration: none;
}

.sidebar-link:hover {
  background: var(--color-accent-light);
  color: var(--color-accent);
}

.sidebar-link.active {
  background: var(--color-accent-light);
  color: var(--color-accent);
  font-weight: 600;
}

.sidebar-icon {
  font-size: 1.1rem;
  width: 24px;
  text-align: center;
  flex-shrink: 0;
}

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

.sidebar-footer .sidebar-link {
  color: var(--color-error);
}

.sidebar-footer .sidebar-link:hover {
  background: var(--color-error-bg);
}

.sidebar-toggle {
  position: fixed;
  bottom: var(--space-lg);
  left: var(--space-lg);
  width: 52px;
  height: 52px;
  background: var(--gradient-accent);
  color: var(--color-white);
  border: none;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-lg);
  cursor: pointer;
  font-size: 1.3rem;
  z-index: 1050;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.sidebar-toggle:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-accent);
}

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 1099;
  backdrop-filter: blur(2px);
}

.sidebar-overlay.is-open {
  display: block;
}

/* Admin sidebar - dark theme */
.sidebar-admin {
  background: var(--gradient-primary);
  border-right-color: rgba(255, 255, 255, 0.06);
}

.sidebar-admin .sidebar-header {
  border-bottom-color: rgba(255, 255, 255, 0.06);
}

.sidebar-admin .sidebar-brand strong {
  color: var(--color-white);
}

.sidebar-admin .sidebar-brand-sub {
  color: var(--color-gray-400);
}

.sidebar-admin .sidebar-close {
  background: rgba(255, 255, 255, 0.08);
  color: var(--color-gray-300);
}

.sidebar-admin .sidebar-close:hover {
  background: rgba(255, 255, 255, 0.15);
  color: var(--color-white);
}

.sidebar-admin .sidebar-link {
  color: var(--color-gray-300);
}

.sidebar-admin .sidebar-link:hover {
  background: rgba(0, 184, 212, 0.1);
  color: var(--color-accent);
}

.sidebar-admin .sidebar-link.active {
  background: rgba(0, 184, 212, 0.15);
  color: var(--color-accent);
}

.sidebar-admin .sidebar-footer {
  border-top-color: rgba(255, 255, 255, 0.06);
}

.sidebar-admin .sidebar-footer .sidebar-link {
  color: var(--color-gray-400);
}

.sidebar-admin .sidebar-footer .sidebar-link:hover {
  background: rgba(244, 67, 54, 0.1);
  color: var(--color-error);
}


/* =============================================
   DASHBOARD LAYOUT
   ============================================= */
.dashboard-layout {
  display: flex;
  min-height: calc(100vh - 68px);
  /* Break out of container to fill full width */
  margin-left: calc(var(--space-lg) * -1);
  margin-right: calc(var(--space-lg) * -1);
  width: calc(100% + var(--space-lg) * 2);
}

.dashboard-content {
  flex: 1;
  padding: var(--space-xl);
  max-width: 100%;
  min-width: 0;
}

.page-title {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  margin-bottom: var(--space-xl);
  color: var(--color-text);
}

.page-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-xl);
  flex-wrap: wrap;
  gap: var(--space-md);
}


/* =============================================
   STAT CARDS
   ============================================= */
.stat-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.stat-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  border: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-xs);
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-accent);
}

.stat-card:nth-child(2)::before {
  background: var(--gradient-gold);
}

.stat-card:nth-child(3)::before {
  background: linear-gradient(135deg, var(--color-green), #66bb6a);
}

.stat-card:nth-child(4)::before {
  background: linear-gradient(135deg, #7c4dff, #b388ff);
}

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

.stat-value {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  color: var(--color-text);
  line-height: 1.2;
}

.stat-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-top: var(--space-xs);
}


/* =============================================
   DASHBOARD SECTIONS
   ============================================= */
.dashboard-section {
  margin-bottom: var(--space-2xl);
}

.dashboard-section .section-title {
  font-size: var(--font-size-xl);
  padding-bottom: var(--space-md);
  border-bottom: 2px solid var(--color-border-light);
  margin-bottom: var(--space-lg);
}


/* =============================================
   DATA TABLES
   ============================================= */
.table-responsive {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-light);
  background: var(--color-surface);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-sm);
}

.data-table thead {
  background: var(--color-gray-50);
}

.data-table th {
  padding: 14px var(--space-lg);
  text-align: left;
  font-weight: 600;
  color: var(--color-text-secondary);
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 2px solid var(--color-border);
  white-space: nowrap;
}

.data-table td {
  padding: 14px var(--space-lg);
  border-bottom: 1px solid var(--color-border-light);
  color: var(--color-text);
  vertical-align: middle;
}

.data-table tbody tr:hover {
  background: var(--color-gray-50);
}

.data-table tbody tr:last-child td {
  border-bottom: none;
}


/* =============================================
   BADGES
   ============================================= */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  font-size: var(--font-size-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
  background: var(--color-gray-100);
  color: var(--color-text-secondary);
  text-transform: capitalize;
}

.badge-active, .badge-success, .badge-completed {
  background: var(--color-success-bg);
  color: #2e7d32;
}

.badge-pending, .badge-warning {
  background: var(--color-warning-bg);
  color: #e65100;
}

.badge-inactive, .badge-error, .badge-rejected {
  background: var(--color-error-bg);
  color: #c62828;
}

.badge-info {
  background: var(--color-info-bg);
  color: #00838f;
}


/* =============================================
   PROGRESS BAR
   ============================================= */
.progress-bar-wrapper {
  width: 100%;
  height: 8px;
  background: var(--color-gray-100);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-bottom: var(--space-sm);
}

.progress-bar {
  height: 100%;
  background: var(--gradient-accent);
  border-radius: var(--radius-full);
  transition: width var(--transition-slow);
  min-width: 0;
}

.progress-text {
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
  display: block;
}

.progress-fill {
  height: 100%;
  background: var(--gradient-accent);
  border-radius: var(--radius-full);
  transition: width 1s ease;
  width: 0;
}

.progress-fill.animated {
  /* Width set via JS */
}


/* =============================================
   CATALOG / MARKETPLACE
   ============================================= */
.catalog-section {
  padding: var(--space-xl) 0;
}

.catalog-header {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.catalog-header h1 {
  font-size: var(--font-size-2xl);
  font-weight: 800;
}

.catalog-search {
  display: flex;
  max-width: 480px;
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.catalog-search:focus-within {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(0, 184, 212, 0.08);
}

.catalog-search .search-input {
  flex: 1;
  padding: 10px 16px;
  border: none;
  background: transparent;
  font-size: var(--font-size-sm);
  font-family: var(--font-family);
  color: var(--color-text);
  outline: none;
}

.catalog-search .btn {
  border-radius: 0;
  min-height: auto;
  padding: 10px 20px;
}

.catalog-layout {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.catalog-sidebar {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  border: 1px solid var(--color-border-light);
}

.catalog-sidebar h3 {
  font-size: var(--font-size-base);
  margin-bottom: var(--space-md);
}

.category-list li {
  margin-bottom: 2px;
}

.category-list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.category-list a:hover,
.category-list a.active {
  background: var(--color-accent-light);
  color: var(--color-accent);
  font-weight: 600;
}

.category-list .count {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}


/* =============================================
   COURSE DETAIL PAGE
   ============================================= */
.course-hero {
  background: var(--gradient-primary);
  color: var(--color-text-light);
  padding: var(--space-3xl) 0;
  position: relative;
  overflow: hidden;
  margin: var(--space-xl) calc(var(--space-lg) * -1) 0;
  width: calc(100% + var(--space-lg) * 2);
  border-radius: var(--radius-lg);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
}

.course-hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0.15;
}

.course-hero-content {
  position: relative;
  z-index: 1;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.course-hero--with-video .course-hero-content {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xl);
  align-items: flex-start;
}

.course-hero-info {
  flex: 1 1 480px;
  min-width: 0;
}

.course-hero-media {
  flex: 0 1 460px;
  min-width: 280px;
  position: relative;
  z-index: 1;
}

.course-hero-media .video-wrap {
  position: relative;
  width: 100%;
  padding-top: 56.25%; /* 16:9 */
  background: rgba(0, 0, 0, 0.4);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.4);
}

.course-hero-media .video-wrap iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
}

@media (max-width: 880px) {
  .course-hero-media {
    flex: 1 1 100%;
    margin-top: var(--space-md);
  }
}

.btn-flyer {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-color: rgba(255, 255, 255, 0.4);
  color: #fff;
  background: rgba(255, 255, 255, 0.06);
}
.btn-flyer:hover {
  background: rgba(255, 255, 255, 0.14);
  border-color: #fff;
}

.course-hero-category {
  display: inline-flex;
  padding: 4px 14px;
  background: rgba(0, 184, 212, 0.2);
  color: var(--color-accent);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: var(--space-md);
}

.course-hero h1 {
  font-size: var(--font-size-3xl);
  color: var(--color-white);
  margin-bottom: var(--space-md);
}

.course-hero-desc {
  font-size: var(--font-size-lg);
  color: var(--color-gray-300);
  margin-bottom: var(--space-lg);
  max-width: none;
  line-height: 1.7;
}

.course-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.meta-item {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--font-size-sm);
  color: var(--color-gray-300);
  padding: 4px 12px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-full);
}

.course-hero-actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-wrap: wrap;
  margin-top: var(--space-md);
}

.course-share {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: var(--space-xl);
  padding-top: var(--space-md);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.course-share-label {
  color: var(--color-gray-300);
  font-size: var(--font-size-sm);
  margin-right: 6px;
}

.share-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  font-weight: 700;
  font-size: 14px;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease;
}

.share-btn:hover {
  transform: translateY(-2px);
  color: #fff;
}

.share-fb:hover { background: #1877f2; }
.share-x:hover  { background: #000; }
.share-wa:hover { background: #25d366; }
.share-li:hover { background: #0a66c2; }
.share-tg:hover { background: #229ed9; }
.share-em:hover { background: #6c63ff; }
.share-copy:hover { background: var(--color-accent); }

.share-copied {
  background: #10b981;
  color: #fff;
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 600;
}

.course-hero-actions .price-display {
  color: var(--color-white);
}

.course-detail-layout {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
  padding: var(--space-xl) 0;
}

.course-section {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  border: 1px solid var(--color-border-light);
  margin-bottom: var(--space-lg);
}

.course-section h2 {
  font-size: var(--font-size-xl);
  padding-bottom: var(--space-md);
  border-bottom: 2px solid var(--color-border-light);
  margin-bottom: var(--space-lg);
}

.rich-content {
  font-size: var(--font-size-base);
  line-height: 1.8;
  color: var(--color-text-secondary);
}

/* Accordion */
.module-accordion {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.accordion-item {
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-fast);
}

.accordion-item.open {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-sm);
}

.accordion-header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  width: 100%;
  background: var(--color-gray-50);
  border: none;
  cursor: pointer;
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text);
  text-align: left;
  transition: background var(--transition-fast);
}

.accordion-header:hover {
  background: var(--color-gray-100);
}

.accordion-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: var(--color-accent);
  color: var(--color-white);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 700;
  flex-shrink: 0;
}

.accordion-title {
  flex: 1;
}

.accordion-meta {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  font-weight: 400;
}

.accordion-icon {
  font-size: 0.7rem;
  transition: transform var(--transition-fast);
  color: var(--color-text-muted);
}

.accordion-item.open .accordion-icon {
  transform: rotate(180deg);
}

.accordion-body {
  display: none;
  padding: var(--space-md) var(--space-lg) var(--space-lg);
}

.accordion-item.open .accordion-body {
  display: block;
}

/* Sidebar cards */
.sidebar-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  border: 1px solid var(--color-border-light);
  margin-bottom: var(--space-lg);
}

.sidebar-card h3 {
  font-size: var(--font-size-base);
  margin-bottom: var(--space-md);
}

.sidebar-cta {
  text-align: center;
  background: var(--gradient-card);
  border-color: rgba(0, 184, 212, 0.2);
}

.sidebar-cta .price-display {
  display: block;
  margin-bottom: var(--space-md);
}

/* Trainers */
.trainer-info {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-sm) 0;
}

.trainer-photo {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  object-fit: cover;
}

.trainer-photo-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent-light);
  color: var(--color-accent);
  font-weight: 700;
  font-size: var(--font-size-sm);
}

.trainer-role {
  display: block;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.course-info-list li {
  padding: 8px 0;
  font-size: var(--font-size-sm);
  border-bottom: 1px solid var(--color-border-light);
  color: var(--color-text-secondary);
}

.course-info-list li:last-child {
  border-bottom: none;
}

.course-info-list li strong {
  color: var(--color-text);
}

/* Reviews */
.reviews-summary {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.reviews-average {
  text-align: center;
}

.reviews-big-number {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  color: var(--color-text);
}

.reviews-stars {
  display: flex;
  justify-content: center;
  gap: 2px;
  margin: var(--space-sm) 0;
}

.star {
  color: var(--color-gray-300);
  font-size: 1.2rem;
}

.star-filled {
  color: var(--color-gold);
}

.reviews-count {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.review-bar-row {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-sm);
}

.bar-label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  min-width: 40px;
  color: var(--color-text-secondary);
}

.bar-track {
  flex: 1;
  height: 8px;
  background: var(--color-gray-100);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.bar-fill {
  height: 100%;
  background: var(--color-gold);
  border-radius: var(--radius-full);
}

.bar-count {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  min-width: 30px;
  text-align: right;
}


/* =============================================
   BOOK CARDS
   ============================================= */
.book-card .course-card-img {
  height: 220px;
  object-fit: contain;
  background: var(--color-gray-50);
  padding: var(--space-md);
}

.book-placeholder {
  font-size: 4rem !important;
}

.book-author {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
  font-style: italic;
}

.book-cover-img {
  object-fit: contain !important;
}

.book-card-actions {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}


/* =============================================
   ACTIVITY & SESSION LISTS
   ============================================= */
.activity-list, .session-list, .cert-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.activity-item, .session-item, .cert-item {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-sm);
  padding: var(--space-md);
  background: var(--color-gray-50);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  transition: background var(--transition-fast);
}

.activity-item:hover, .session-item:hover, .cert-item:hover {
  background: var(--color-gray-100);
}

.activity-user {
  font-weight: 600;
  color: var(--color-text);
}

.activity-action {
  color: var(--color-text-secondary);
}

.activity-entity {
  color: var(--color-text-muted);
  font-size: var(--font-size-xs);
}

.activity-time {
  margin-left: auto;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.session-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.session-course {
  font-size: var(--font-size-xs);
  color: var(--color-accent);
}

.session-time {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.session-duration {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.cert-course {
  font-weight: 600;
  color: var(--color-text);
  flex: 1;
}

.cert-number {
  font-size: var(--font-size-xs);
  color: var(--color-accent);
  font-family: monospace;
}

.cert-date {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}


/* =============================================
   CHART / REVENUE
   ============================================= */
.chart-container {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  border: 1px solid var(--color-border-light);
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.chart-placeholder {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}


/* =============================================
   EMPTY STATE
   ============================================= */
.empty-state {
  text-align: center;
  padding: var(--space-3xl) var(--space-xl);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 2px dashed var(--color-border);
}

.empty-state p {
  color: var(--color-text-muted);
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-lg);
}


/* =============================================
   PAGINATION
   ============================================= */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  margin-top: var(--space-xl);
  flex-wrap: wrap;
}

.pagination a, .pagination span {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 12px;
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 500;
  text-decoration: none;
  transition: all var(--transition-fast);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  background: var(--color-surface);
}

.pagination a:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: var(--color-accent-light);
}

.pagination .active {
  background: var(--gradient-accent);
  color: var(--color-white);
  border-color: transparent;
}

.pagination .disabled {
  opacity: 0.4;
  pointer-events: none;
}


/* =============================================
   MODAL
   ============================================= */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 2000;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg);
  backdrop-filter: blur(4px);
}

.modal-overlay.is-open {
  display: flex;
}

.modal {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  max-width: 600px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-2xl);
  animation: modalIn 0.3s ease;
}

@keyframes modalIn {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg) var(--space-xl);
  border-bottom: 1px solid var(--color-border-light);
}

.modal-body {
  padding: var(--space-xl);
}

.modal-footer {
  display: flex;
  gap: var(--space-md);
  justify-content: flex-end;
  padding: var(--space-lg) var(--space-xl);
  border-top: 1px solid var(--color-border-light);
}

.modal-close {
  background: var(--color-gray-100);
  border: none;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: 1.2rem;
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.modal-close:hover {
  background: var(--color-gray-200);
  color: var(--color-text);
}


/* =============================================
   PWA INSTALL PROMPT
   ============================================= */
.pwa-install-banner {
  position: fixed;
  bottom: var(--space-lg);
  left: var(--space-lg);
  right: var(--space-lg);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-2xl);
  border: 1px solid var(--color-border);
  z-index: 3000;
  display: none;
  align-items: center;
  gap: var(--space-md);
  animation: slideUp 0.4s ease;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.pwa-install-banner.show {
  display: flex;
}

.pwa-install-banner img {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
}

.pwa-install-info {
  flex: 1;
}

.pwa-install-info h4 {
  font-size: var(--font-size-sm);
  margin-bottom: 2px;
}

.pwa-install-info p {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin: 0;
}

.pwa-install-dismiss {
  background: none;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  padding: var(--space-sm);
  font-size: 1.2rem;
}


/* =============================================
   SITE FOOTER
   ============================================= */
.site-footer {
  background: var(--gradient-primary);
  color: var(--color-gray-300);
  padding-top: var(--space-3xl);
  margin-top: auto;
}

.footer-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
  padding-bottom: var(--space-2xl);
}

.footer-col h4 {
  color: var(--color-white);
  font-size: var(--font-size-base);
  margin-bottom: var(--space-md);
}

.footer-col p {
  color: var(--color-gray-400);
  font-size: var(--font-size-sm);
  line-height: 1.6;
}

.footer-col a {
  display: block;
  color: var(--color-gray-400);
  font-size: var(--font-size-sm);
  padding: 4px 0;
  transition: color var(--transition-fast);
}

.footer-col a:hover {
  color: var(--color-accent);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.footer-logo img {
  height: 36px;
  width: auto;
}

.footer-logo strong {
  font-size: var(--font-size-lg);
  color: var(--color-white);
}

.footer-org {
  font-size: var(--font-size-xs) !important;
  color: var(--color-gray-500) !important;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: var(--space-lg) 0;
  text-align: center;
}

.footer-bottom p {
  font-size: var(--font-size-xs);
  color: var(--color-gray-500);
  margin: 0;
}

.footer-social {
  display: flex;
  gap: var(--space-md);
  margin-top: var(--space-md);
}

.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.08);
  color: var(--color-gray-400);
  transition: all var(--transition-fast);
}

.footer-social a:hover {
  background: var(--color-accent);
  color: var(--color-white);
}


/* =============================================
   UTILITIES
   ============================================= */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-accent { color: var(--color-accent); }
.text-gold { color: var(--color-gold); }
.text-muted { color: var(--color-text-muted); }
.text-success { color: var(--color-success); }
.text-error { color: var(--color-error); }
.text-sm { font-size: var(--font-size-sm); }
.text-xs { font-size: var(--font-size-xs); }
.font-bold { font-weight: 700; }
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--space-md); }
.mt-2 { margin-top: var(--space-xl); }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-md); }
.mb-2 { margin-bottom: var(--space-xl); }
.hidden { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }


/* =============================================
   RESPONSIVE: TABLET (768px+)
   ============================================= */
@media (min-width: 768px) {
  .logo .tagline {
    display: block;
  }

  .hero-content h1 {
    font-size: var(--font-size-5xl);
  }

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

  .categories-grid {
    grid-template-columns: repeat(3, 1fr);
  }

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

  .stat-cards {
    grid-template-columns: repeat(4, 1fr);
  }

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

  .catalog-layout {
    flex-direction: row;
  }

  .catalog-sidebar {
    width: 240px;
    flex-shrink: 0;
    position: sticky;
    top: 84px;
    align-self: flex-start;
  }

  .catalog-main {
    flex: 1;
  }

  .course-detail-layout {
    flex-direction: row;
  }

  .course-detail-main {
    flex: 1;
  }

  .course-detail-sidebar {
    width: 320px;
    flex-shrink: 0;
  }

  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr;
  }

  .reviews-summary {
    flex-direction: row;
    align-items: flex-start;
  }

  .reviews-average {
    flex-shrink: 0;
    width: 160px;
  }

  .reviews-bars {
    flex: 1;
  }

  .pwa-install-banner {
    left: auto;
    right: var(--space-lg);
    max-width: 400px;
  }
}


/* =============================================
   RESPONSIVE: DESKTOP (1024px+)
   ============================================= */
@media (min-width: 1024px) {
  /* Show inline nav */
  .main-nav {
    display: flex;
    position: static;
    background: transparent;
    border: none;
    box-shadow: none;
    padding: 0;
  }

  .main-nav a {
    padding: 8px 16px;
    border-bottom: none;
    border-left: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
  }

  .main-nav a:hover,
  .main-nav a.active {
    background-color: rgba(255, 255, 255, 0.08);
    border-left-color: transparent;
  }

  .menu-toggle {
    display: none;
  }

  /* Course grid */
  .course-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .categories-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .features-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  /* Sidebar: permanent on desktop */
  .sidebar {
    transform: translateX(0);
    box-shadow: none;
    z-index: 100;
    border-right: 1px solid var(--color-border-light);
    position: fixed;
  }

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

  .sidebar-toggle {
    display: none;
  }

  .sidebar-close {
    display: none;
  }

  .dashboard-layout {
    padding-left: var(--sidebar-width);
  }

  .dashboard-content {
    padding: var(--space-2xl) var(--space-3xl);
  }

  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }

  .catalog-header {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}


/* =============================================
   RESPONSIVE: LARGE DESKTOP (1280px+)
   ============================================= */
@media (min-width: 1280px) {
  .course-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .hero-content h1 {
    font-size: 3.5rem;
  }
}


/* =============================================
   ANIMATIONS & TRANSITIONS
   ============================================= */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.fade-in {
  animation: fadeIn 0.5s ease;
}

.fade-in-up {
  animation: fadeInUp 0.5s ease;
}

.loading-spinner {
  width: 24px;
  height: 24px;
  border: 3px solid var(--color-gray-200);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}


/* =============================================
   DARK MODE SUPPORT (auto)
   ============================================= */
@media (prefers-color-scheme: dark) {
  :root {
    --color-body-bg: #0f1225;
    --color-surface: #1a1f36;
    --color-surface-hover: #232847;
    --color-border: #2d3250;
    --color-border-light: #232847;
    --color-text: #e2e8f0;
    --color-text-secondary: #94a3b8;
    --color-gray-50: #1a1f36;
    --color-gray-100: #232847;
    --color-gray-200: #2d3250;
  }

  .sidebar {
    background: #13162a;
  }

  .auth-card {
    box-shadow: var(--shadow-lg);
  }

  .catalog-search {
    background: var(--color-surface);
  }

  .stat-card,
  .course-card,
  .course-section,
  .sidebar-card,
  .chart-container {
    background: var(--color-surface);
    border-color: var(--color-border);
  }

  .data-table thead {
    background: rgba(255, 255, 255, 0.03);
  }

  .data-table td {
    border-bottom-color: var(--color-border);
  }

  .empty-state {
    background: var(--color-surface);
    border-color: var(--color-border);
  }
}


/* =============================================
   FILTER BAR (shared — admin.css overrides for dark theme)
   ============================================= */
.filter-form {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 16px 20px;
  margin-bottom: 20px;
}

.filter-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
}

.filter-row .form-control {
  flex: 1 1 200px;
  min-width: 160px;
}

.filter-row .btn {
  flex-shrink: 0;
}

.results-count {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
}

/* =============================================
   PRINT STYLES
   ============================================= */
@media print {
  .site-header,
  .site-footer,
  .sidebar,
  .sidebar-toggle,
  .menu-toggle,
  .hero-search,
  .hero-cta,
  .btn,
  .pwa-install-banner {
    display: none !important;
  }

  body {
    background: white;
    color: black;
  }

  .container {
    max-width: 100%;
  }

  .dashboard-layout {
    padding-left: 0;
  }
}