/**
 * Atora Learning Pro — Component Library
 * Rich UI components for navigation, course cards, instructor profiles,
 * forms, curriculum, dashboard, footer and more.
 */

:root {
  --font-sans: "Manrope", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  --font-extrabold: 800;
  --font-black: 900;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-7xl: 4.5rem;

  --leading-tight: 1.2;
  --leading-snug: 1.35;
  --leading-normal: 1.5;
  --leading-relaxed: 1.65;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;

  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.25rem;
  --radius-full: 9999px;

  --color-primary: #4A7CB5;
  --color-primary-dark: #2C5F8A;
  --color-primary-light: #6C98CB;
  --color-primary-lighter: #9EC0E2;
  --color-primary-lightest: #EAF3FC;
  --color-secondary: #F0A020;
  --color-secondary-dark: #D4781A;
  --color-secondary-light: #F5BF59;
  --color-secondary-lightest: #FFF3DE;

  --color-success: #10B981;
  --color-success-light: #D1FAE5;
  --color-warning: #F59E0B;
  --color-error: #EF4444;
  --color-error-light: #FEE2E2;
  --color-info: #0EA5E9;
  --color-info-light: #E0F2FE;

  --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-surface: #FFFFFF;
  --color-bg: #F8FAFC;
  --gradient-primary: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  --gradient-hero: linear-gradient(140deg, #1E3A8A 0%, #2C5F8A 45%, #4A7CB5 100%);

  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.08);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 14px 36px rgba(15, 23, 42, 0.12);
  --shadow-xl: 0 20px 50px rgba(15, 23, 42, 0.14);
  --shadow-2xl: 0 28px 64px rgba(15, 23, 42, 0.2);
  --shadow-primary: 0 14px 30px rgba(74, 124, 181, 0.35);

  --transition-fast: 180ms ease;
  --transition-base: 260ms ease;
  --transition-slow: 380ms ease;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);

  --z-dropdown: 40;
  --z-fixed: 60;
  --z-modal: 70;
  --z-toast: 80;

  --header-height: 72px;
}

html,
body {
  background: var(--color-bg);
  color: var(--color-gray-900);
  font-family: var(--font-sans);
}

.atora-header-widget-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-4);
  padding: var(--space-3) 0;
}

.atora-content-area {
  padding: var(--space-8) 0;
}

.atora-main-content-wrapper {
  display: grid;
  gap: var(--space-8);
  margin-top: var(--space-6);
}

.atora-main-content-wrapper.has-sidebar {
  grid-template-columns: minmax(0, 2fr) minmax(260px, 1fr);
}

.atora-main-content-wrapper.no-sidebar {
  grid-template-columns: 1fr;
}

.atora-page-content-wrapper {
  max-width: 800px;
  margin: var(--space-6) auto 0;
}

.atora-posts-grid {
  display: grid;
  gap: var(--space-8);
}

.atora-no-results {
  text-align: center;
  padding: var(--space-16) var(--space-8);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-xl);
  background: var(--color-surface);
}

.atora-entry-header-centered {
  text-align: center;
  margin-bottom: var(--space-8);
}

.atora-entry-thumbnail {
  margin-bottom: var(--space-8);
  border-radius: var(--radius-xl);
  overflow: hidden;
}

.atora-entry-thumbnail-image {
  width: 100%;
  height: auto;
  display: block;
}

.atora-entry-content-lg {
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
}

.atora-single-entry-header {
  margin-bottom: var(--space-6);
}

.atora-single-entry-title {
  margin-bottom: var(--space-4);
}

.atora-entry-meta {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  font-size: var(--text-sm);
  color: var(--color-gray-600);
}

.atora-single-entry-footer {
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-gray-200);
}

.atora-author-bio {
  margin-top: var(--space-8);
  padding: var(--space-6);
  border-radius: var(--radius-xl);
  background: var(--color-gray-100);
}

.atora-author-bio-inner {
  display: flex;
  gap: var(--space-4);
}

.atora-author-name {
  margin-bottom: var(--space-2);
}

.atora-author-description {
  margin: 0;
  color: var(--color-gray-700);
}

.atora-post-card {
  background: var(--color-surface);
  padding: var(--space-6);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.atora-post-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.atora-post-thumbnail {
  margin-bottom: var(--space-4);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.atora-post-thumbnail-image {
  width: 100%;
  height: auto;
  display: block;
}

.atora-post-entry-header {
  margin-bottom: var(--space-4);
}

.atora-post-entry-title {
  margin-bottom: var(--space-2);
}

.atora-post-title-link {
  color: var(--color-gray-900);
  text-decoration: none;
}

.atora-post-title-link:hover {
  color: var(--color-primary);
}

.atora-post-entry-content {
  color: var(--color-gray-700);
  line-height: var(--leading-relaxed);
}

.atora-post-entry-footer {
  margin-top: var(--space-4);
}

.atora-course-card {
  background: var(--color-surface);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  display: flex;
  flex-direction: column;
  height: 100%;
}

.atora-course-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.atora-course-thumbnail {
  position: relative;
  height: 200px;
  overflow: hidden;
}

.atora-course-thumbnail-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.atora-course-thumbnail-fallback {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
}

.atora-course-badges {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  display: flex;
}

.atora-course-level-badge {
  background: var(--color-secondary);
  color: #fff;
}

.atora-course-duration {
  position: absolute;
  bottom: var(--space-3);
  left: var(--space-3);
  background: rgba(15, 23, 42, 0.72);
  color: #fff;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.atora-course-content {
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  flex: 1;
}

.atora-course-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
  font-size: var(--text-sm);
}

.atora-course-primary-label {
  color: var(--color-primary);
  font-weight: var(--font-medium);
}

.atora-course-date {
  color: var(--color-gray-600);
}

.atora-course-title {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  line-height: var(--leading-tight);
  margin-bottom: var(--space-3);
}

.atora-course-title-link {
  color: var(--color-gray-900);
  text-decoration: none;
}

.atora-course-title-link:hover {
  color: var(--color-primary);
}

.atora-course-instructor {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-gray-600);
}

.atora-course-instructor-avatar {
  border-radius: 50%;
}

.atora-course-excerpt {
  color: var(--color-gray-700);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-4);
  flex: 1;
}

.atora-course-stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-gray-200);
  color: var(--color-gray-600);
  font-size: var(--text-sm);
}

.atora-course-stats:empty {
  display: none;
}

.atora-course-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-3);
}

.atora-course-price-current {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--color-primary);
}

.atora-course-price-original {
  margin-left: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  text-decoration: line-through;
}

.atora-course-price-label {
  font-size: var(--text-base);
}

.search-form-row {
  display: flex;
  gap: var(--space-2);
}

.search-field {
  flex: 1;
}

.search-submit {
  white-space: nowrap;
}

.atora-search-overlay {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  display: none;
}

.atora-search-overlay.active {
  display: block;
}

.atora-search-overlay-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(4px);
}

.atora-search-overlay-panel {
  position: relative;
  max-width: 680px;
  margin: min(14vh, 110px) auto 0;
  background: var(--color-surface);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-2xl);
  padding: var(--space-8);
  border: 1px solid var(--color-gray-200);
}

.atora-search-close {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-gray-300);
  background: var(--color-gray-50);
  color: var(--color-gray-700);
  cursor: pointer;
}

.atora-search-title {
  margin: 0 0 var(--space-4);
  font-size: var(--text-2xl);
}

.atora-search-form-wrap .search-form {
  margin: 0;
}

body.search-open {
  overflow: hidden;
}

/* ============================================================
   NAVIGATION
   ============================================================ */
.site-header {
  position: relative;
  z-index: 50;
}

.site-header .custom-logo-link,
.atora-brand-logo-link {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

.site-header .custom-logo,
.atora-brand-logo {
  display: block;
  width: auto;
  height: auto;
  max-height: 56px;
}

.atora-header-logo {
  max-height: 52px;
}

.hb-nav.main-navigation {
  min-width: 0;
}

.footer-logo .custom-logo-link,
.atora-footer-logo-link {
  display: inline-flex;
  align-items: center;
}

.footer-logo .custom-logo,
.atora-footer-logo {
  width: auto;
  height: auto;
  max-height: 44px;
}

.primary-menu {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--space-1);
  align-items: center;
}

.primary-menu a {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: 0.5rem 0.875rem;
  color: var(--color-gray-600);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
  text-decoration: none;
  position: relative;
}
.primary-menu a:hover {
  color: var(--color-primary);
  background: var(--color-primary-lightest);
}
.primary-menu .current-menu-item > a,
.primary-menu .current-menu-ancestor > a {
  color: var(--color-primary);
  background: var(--color-primary-lightest);
  font-weight: var(--font-semibold);
}

/* Nav active indicator */
.primary-menu .current-menu-item > a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: var(--color-primary);
  border-radius: var(--radius-full);
}

/* Dropdown */
.primary-menu li { position: relative; }

.primary-menu .sub-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  min-width: 220px;
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--color-gray-100);
  padding: var(--space-2);
  list-style: none;
  margin: 0;
  z-index: var(--z-dropdown);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all var(--transition-base);
  pointer-events: none;
}
.primary-menu li:hover > .sub-menu,
.primary-menu li:focus-within > .sub-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  pointer-events: auto;
}

.primary-menu .sub-menu a {
  padding: 0.5rem 0.875rem;
  border-radius: var(--radius-lg);
  color: var(--color-gray-700);
  font-size: var(--text-sm);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.primary-menu .sub-menu a:hover {
  background: var(--color-primary-lightest);
  color: var(--color-primary);
}

/* Header actions (login / sign-up) */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Mobile menu */
@media (max-width: 768px) {
  .atora-header-widget-grid {
    grid-template-columns: 1fr;
  }

  .atora-main-content-wrapper.has-sidebar {
    grid-template-columns: 1fr;
  }

  .atora-author-bio-inner {
    flex-direction: column;
  }

  .atora-course-footer {
    flex-direction: column;
    align-items: flex-start;
  }

  .atora-search-overlay-panel {
    margin: var(--space-6) var(--space-4) 0;
    padding: var(--space-6);
  }

  .search-form-row {
    flex-direction: column;
  }

  .atora-header-logo {
    max-height: 40px;
  }

  .mobile-menu-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 44px;
    height: 44px;
    background: var(--color-gray-100);
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    padding: 0;
    transition: background var(--transition-fast);
  }
  .mobile-menu-toggle:hover { background: var(--color-primary-lightest); }

  .hamburger { display: flex; flex-direction: column; gap: 5px; }
  .hamburger span {
    display: block; width: 22px; height: 2px;
    background: var(--color-gray-700);
    border-radius: 2px;
    transition: all var(--transition-base);
  }
  .mobile-menu-toggle[aria-expanded="true"] .hamburger span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
    background: var(--color-primary);
  }
  .mobile-menu-toggle[aria-expanded="true"] .hamburger span:nth-child(2) { opacity: 0; transform: scaleX(0); }
  .mobile-menu-toggle[aria-expanded="true"] .hamburger span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
    background: var(--color-primary);
  }

  .main-navigation {
    position: fixed;
    top: 0;
    right: -100%;
    width: min(85%, 380px);
    height: 100dvh;
    background: var(--color-surface);
    box-shadow: var(--shadow-2xl);
    z-index: var(--z-modal);
    overflow-y: auto;
    padding: var(--space-20) var(--space-6) var(--space-8);
    transition: right var(--transition-slow);
  }
  .main-navigation.active { right: 0; }

  .primary-menu { flex-direction: column; gap: var(--space-1); align-items: stretch; }
  .primary-menu a {
    padding: var(--space-4);
    font-size: var(--text-base);
    border-bottom: 1px solid var(--color-gray-100);
    border-radius: 0;
  }
  .primary-menu a::after { display: none; }
  .primary-menu .sub-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    background: var(--color-gray-50);
    pointer-events: auto;
    padding-left: var(--space-4);
  }

  /* Mobile nav overlay */
  .nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    z-index: calc(var(--z-modal) - 1);
    backdrop-filter: blur(2px);
  }
  .menu-open .nav-overlay { display: block; }
}

@media (min-width: 769px) {
  .mobile-menu-toggle { display: none; }
}

/* ============================================================
   HERO SECTION
   ============================================================ */
.hero {
  position: relative;
  background: var(--gradient-hero);
  color: #fff;
  overflow: hidden;
  padding: var(--space-20) 0;
}

/* Decorative blobs */
.hero::before,
.hero::after {
  content: '';
  position: absolute;
  border-radius: var(--radius-full);
  opacity: 0.15;
  filter: blur(60px);
  pointer-events: none;
}
.hero::before {
  width: 500px; height: 500px;
  background: #7C3AED;
  top: -200px; right: -100px;
}
.hero::after {
  width: 350px; height: 350px;
  background: #06B6D4;
  bottom: -100px; left: -50px;
}

.hero-title {
  font-size: clamp(2.25rem, 5vw, var(--text-7xl));
  font-weight: var(--font-black);
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-6);
  color: #fff;
}

.hero-subtitle {
  font-size: clamp(var(--text-base), 2vw, var(--text-xl));
  color: rgba(255,255,255,0.85);
  max-width: 600px;
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-8);
}

.hero-actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

/* ============================================================
   SECTION TITLES
   ============================================================ */
.section-title {
  font-size: clamp(1.75rem, 3vw, var(--text-4xl));
  font-weight: var(--font-extrabold);
  color: var(--color-gray-900);
  margin-bottom: var(--space-3);
  letter-spacing: -0.02em;
}
.section-subtitle {
  font-size: var(--text-lg);
  color: var(--color-gray-500);
  max-width: 560px;
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-10);
}
.section-header { margin-bottom: var(--space-10); }
.section-header.centered { text-align: center; }
.section-header.centered .section-subtitle { margin-left: auto; margin-right: auto; }

/* Eyebrow label */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: var(--font-bold);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
  background: var(--color-primary-lightest);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
}

/* ============================================================
   COURSE ENROLL CARD (sidebar sticky)
   ============================================================ */
.course-enroll-card {
  background: var(--color-surface);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-2xl);
  overflow: hidden;
  border: 1px solid var(--color-gray-100);
  position: sticky;
  top: calc(var(--header-height) + var(--space-6));
}
.course-enroll-card .thumbnail-wrap {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/9;
}
.course-enroll-card .thumbnail-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}
.course-enroll-card:hover .thumbnail-wrap img { transform: scale(1.04); }

.enroll-card-body {
  padding: var(--space-6);
}
.enroll-card-price {
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}
.enroll-price-current {
  font-size: var(--text-4xl);
  font-weight: var(--font-black);
  color: var(--color-primary);
  letter-spacing: -0.03em;
  line-height: 1;
}
.enroll-price-original {
  font-size: var(--text-lg);
  text-decoration: line-through;
  color: var(--color-gray-400);
}
.enroll-discount-badge {
  padding: 0.2rem 0.6rem;
  background: var(--color-error-light);
  color: var(--color-error);
  font-size: var(--text-xs);
  font-weight: var(--font-bold);
  border-radius: var(--radius-full);
}

/* Includes list */
.course-includes-list {
  list-style: none;
  padding: 0;
  margin: var(--space-6) 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.course-includes-list li {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-gray-700);
}
.include-check {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  background: var(--color-secondary-lightest);
  color: var(--color-secondary-dark);
  border-radius: var(--radius-full);
  font-size: 11px;
  flex-shrink: 0;
  font-weight: var(--font-bold);
}

/* ============================================================
   INSTRUCTOR CARD
   ============================================================ */
.instructor-card {
  display: flex;
  gap: var(--space-5);
  padding: var(--space-6);
  background: var(--color-surface);
  border-radius: var(--radius-2xl);
  border: 1px solid var(--color-gray-100);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}
.instructor-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.instructor-avatar {
  position: relative;
  flex-shrink: 0;
}
.instructor-avatar img {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-full);
  object-fit: cover;
  border: 3px solid var(--color-primary-lightest);
  box-shadow: var(--shadow-md);
}
.instructor-verified {
  position: absolute;
  bottom: 2px;
  right: 2px;
  width: 20px;
  height: 20px;
  background: var(--color-secondary);
  border-radius: var(--radius-full);
  border: 2px solid #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  color: #fff;
}

.instructor-info { flex: 1; min-width: 0; }
.instructor-name {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--color-gray-900);
  margin-bottom: var(--space-1);
}
.instructor-title {
  font-size: var(--text-sm);
  color: var(--color-primary);
  font-weight: var(--font-medium);
  margin-bottom: var(--space-3);
}
.instructor-stats {
  display: flex;
  gap: var(--space-5);
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  flex-wrap: wrap;
}
.instructor-stat { display: flex; align-items: center; gap: var(--space-1); }
.instructor-bio {
  font-size: var(--text-sm);
  color: var(--color-gray-600);
  line-height: var(--leading-relaxed);
  margin-top: var(--space-4);
}

/* ============================================================
   TESTIMONIAL
   ============================================================ */
.testimonial-card {
  background: var(--color-surface);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-gray-100);
  position: relative;
}
.testimonial-card::before {
  content: '"';
  position: absolute;
  top: var(--space-4);
  left: var(--space-6);
  font-size: 4rem;
  font-weight: var(--font-black);
  color: var(--color-primary-lighter);
  line-height: 1;
}
.testimonial-text {
  font-size: var(--text-lg);
  color: var(--color-gray-700);
  line-height: var(--leading-relaxed);
  font-style: italic;
  margin-bottom: var(--space-6);
  padding-top: var(--space-4);
}
.testimonial-author {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.testimonial-author img {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  object-fit: cover;
}
.testimonial-author-name { font-weight: var(--font-semibold); color: var(--color-gray-900); }
.testimonial-author-title { font-size: var(--text-sm); color: var(--color-gray-500); }

/* Testimonial grid */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-6);
}

/* ============================================================
   RATING STARS
   ============================================================ */
.rating-stars {
  display: inline-flex;
  gap: 2px;
}
.star-filled  { color: #FBBF24; }
.star-half    { color: #FBBF24; }
.star-empty   { color: var(--color-gray-300); }

.rating-inline {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.rating-score {
  font-weight: var(--font-bold);
  color: var(--color-gray-900);
  font-size: var(--text-lg);
}
.rating-count-text { font-size: var(--text-sm); color: var(--color-gray-500); }

/* ============================================================
   FORMS (enhanced)
   ============================================================ */
.form-field {
  position: relative;
  margin-bottom: var(--space-5);
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-gray-700);
  margin-bottom: var(--space-2);
}
.form-label .required-mark { color: var(--color-error); margin-left: 2px; }

.form-input,
input[type="text"],
input[type="email"],
input[type="url"],
input[type="password"],
input[type="search"],
input[type="number"],
input[type="tel"],
input[type="date"],
select,
textarea {
  width: 100%;
  padding: 0.65rem var(--space-4);
  background: var(--color-surface);
  border: 1.5px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  font-size: var(--text-base);
  font-family: var(--font-sans);
  color: var(--color-gray-900);
  line-height: var(--leading-normal);
  transition: all var(--transition-fast);
  min-height: 44px;
}
.form-input:hover,
input[type="text"]:hover,
input[type="email"]:hover,
input[type="password"]:hover,
select:hover { border-color: var(--color-gray-300); }

.form-input:focus,
input[type="text"]:focus,
input[type="email"]:focus,
input[type="url"]:focus,
input[type="password"]:focus,
input[type="search"]:focus,
input[type="number"]:focus,
input[type="tel"]:focus,
input[type="date"]:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgb(79 70 229 / 0.12);
  background: var(--color-surface);
}

.form-input.error,
input.error,
textarea.error,
select.error {
  border-color: var(--color-error);
  box-shadow: 0 0 0 4px rgb(239 68 68 / 0.1);
}
.form-input.success,
input.success { border-color: var(--color-success); }

.form-hint {
  font-size: var(--text-xs);
  color: var(--color-gray-500);
  margin-top: var(--space-2);
}
.form-error {
  font-size: var(--text-xs);
  color: var(--color-error);
  margin-top: var(--space-2);
  font-weight: var(--font-medium);
}

label { display: block; margin-bottom: var(--space-2); font-weight: var(--font-medium); color: var(--color-gray-700); }

/* Input with icon */
.input-icon-wrap { position: relative; }
.input-icon-wrap .form-input { padding-left: 2.75rem; }
.input-icon-wrap .icon {
  position: absolute;
  left: 0.875rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-gray-400);
  pointer-events: none;
  font-size: 1rem;
}

/* ============================================================
   COURSE NAV TABS
   ============================================================ */
.course-nav-tabs {
  border-bottom: 2px solid var(--color-gray-200);
  margin-bottom: var(--space-8);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.course-nav-tabs::-webkit-scrollbar { display: none; }

.course-nav-tabs ul {
  display: flex;
  gap: 0;
  list-style: none;
  padding: 0;
  margin: 0;
  min-width: max-content;
}

.course-nav-tabs a {
  display: block;
  padding: var(--space-4) var(--space-5);
  color: var(--color-gray-500);
  font-weight: var(--font-semibold);
  font-size: var(--text-sm);
  white-space: nowrap;
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  transition: all var(--transition-fast);
  text-decoration: none;
}
.course-nav-tabs a:hover { color: var(--color-primary); border-bottom-color: var(--color-primary-lighter); }
.course-nav-tabs a[aria-current="true"],
.course-nav-tabs a.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

/* ============================================================
   PAGINATION
   ============================================================ */
.pagination {
  display: flex;
  justify-content: center;
  gap: var(--space-2);
  margin-top: var(--space-10);
  flex-wrap: wrap;
}
.page-numbers {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 var(--space-3);
  background: var(--color-surface);
  border: 1.5px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  color: var(--color-gray-700);
  font-weight: var(--font-medium);
  font-size: var(--text-sm);
  transition: all var(--transition-fast);
  text-decoration: none;
}
.page-numbers:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-lightest);
}
.page-numbers.current {
  background: var(--gradient-primary);
  border-color: transparent;
  color: #fff;
  box-shadow: var(--shadow-primary);
}
.page-numbers.dots { border-color: transparent; background: none; }

/* ============================================================
   BREADCRUMBS
   ============================================================ */
.breadcrumbs {
  font-size: var(--text-sm);
  margin-bottom: var(--space-6);
  color: var(--color-gray-400);
}
.breadcrumb-list {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
}
.breadcrumb-list li { display: flex; align-items: center; gap: var(--space-2); }
.breadcrumb-list li:not(:last-child)::after {
  content: '/';
  color: var(--color-gray-300);
}
.breadcrumb-list a { color: var(--color-gray-500); transition: color var(--transition-fast); }
.breadcrumb-list a:hover { color: var(--color-primary); }
.breadcrumb-list .active { color: var(--color-gray-700); font-weight: var(--font-medium); }

/* ============================================================
   COMMENTS
   ============================================================ */
.comments-area {
  margin-top: var(--space-16);
  padding-top: var(--space-10);
  border-top: 2px solid var(--color-gray-100);
}
.comments-title { margin-bottom: var(--space-8); }

.comment-list { list-style: none; margin: 0; padding: 0; }
.comment       { margin-bottom: var(--space-6); }

.comment-body {
  background: var(--color-gray-50);
  padding: var(--space-6);
  border-radius: var(--radius-2xl);
  border: 1px solid var(--color-gray-100);
}
.comment-meta {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-4);
  flex-wrap: wrap;
  gap: var(--space-3);
}
.comment-author {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.comment-author img { border-radius: var(--radius-full); }
.comment-author-name { font-weight: var(--font-semibold); color: var(--color-gray-900); }
.comment-metadata { font-size: var(--text-xs); color: var(--color-gray-500); margin-top: 2px; }
.comment-time { font-size: var(--text-sm); color: var(--color-gray-400); }
.comment-content { line-height: var(--leading-relaxed); color: var(--color-gray-700); margin-bottom: var(--space-4); }
.comment-reply-link {
  font-size: var(--text-sm);
  color: var(--color-primary);
  font-weight: var(--font-medium);
  text-decoration: none;
  transition: color var(--transition-fast);
}
.comment-reply-link:hover { color: var(--color-primary-dark); }
.children { list-style: none; margin-left: var(--space-10); padding: 0; margin-top: var(--space-4); }

/* ============================================================
   TABLES
   ============================================================ */
.table-wrapper { overflow-x: auto; border-radius: var(--radius-xl); border: 1px solid var(--color-gray-200); }

table { width: 100%; border-collapse: collapse; font-size: var(--text-sm); }
thead { background: var(--color-gray-50); }
th {
  padding: var(--space-4) var(--space-5);
  font-weight: var(--font-semibold);
  color: var(--color-gray-700);
  text-align: left;
  border-bottom: 2px solid var(--color-gray-200);
  white-space: nowrap;
}
td {
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-gray-100);
  color: var(--color-gray-700);
  vertical-align: middle;
}
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover td { background: var(--color-primary-lightest); }

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer { background: var(--color-gray-900); color: var(--color-gray-400); }

.footer-top {
  padding: var(--space-20) 0 var(--space-12);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: var(--space-10);
}
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .footer-grid { grid-template-columns: 1fr; gap: var(--space-8); }
}

.footer-brand { max-width: 280px; }
.footer-logo { margin-bottom: var(--space-4); }
.footer-tagline { font-size: var(--text-sm); line-height: var(--leading-relaxed); color: var(--color-gray-500); }

.footer-social {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-6);
}
.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-lg);
  background: rgba(255,255,255,0.07);
  color: var(--color-gray-400);
  font-size: var(--text-sm);
  transition: all var(--transition-fast);
  border: 1px solid rgba(255,255,255,0.06);
  text-decoration: none;
}
.footer-social a:hover {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-primary);
}

.footer-widget-title {
  font-size: var(--text-sm);
  font-weight: var(--font-bold);
  color: #fff;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: var(--space-5);
}
.footer-widget ul { list-style: none; margin: 0; padding: 0; }
.footer-widget li { margin-bottom: var(--space-3); }
.footer-widget a {
  color: var(--color-gray-400);
  font-size: var(--text-sm);
  transition: color var(--transition-fast);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}
.footer-widget a:hover { color: #fff; }
.footer-widget a::before { content: '→'; font-size: 0.75em; opacity: 0; transform: translateX(-4px); transition: all var(--transition-fast); }
.footer-widget a:hover::before { opacity: 1; transform: translateX(0); }

.footer-bottom {
  padding: var(--space-6) 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-gray-600);
}

.footer-menu {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--space-6);
  flex-wrap: wrap;
}
.footer-menu a {
  color: var(--color-gray-600);
  font-size: var(--text-sm);
  transition: color var(--transition-fast);
  text-decoration: none;
}
.footer-menu a:hover { color: #fff; }

/* ============================================================
   TOAST NOTIFICATIONS
   ============================================================ */
.toast-container {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  pointer-events: none;
}
.toast {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: var(--color-gray-900);
  color: #fff;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-2xl);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  min-width: 260px;
  max-width: 380px;
  pointer-events: auto;
  animation: fadeInUp 0.3s var(--ease-out) both;
  border: 1px solid rgba(255,255,255,0.08);
}
.toast.success { background: #065F46; border-color: rgba(16,185,129,0.3); }
.toast.error   { background: #7F1D1D; border-color: rgba(239,68,68,0.3); }
.toast.warning { background: #78350F; border-color: rgba(245,158,11,0.3); }
.toast-icon    { font-size: 1.1em; flex-shrink: 0; }
.toast-dismiss {
  margin-left: auto;
  background: none;
  border: none;
  color: rgba(255,255,255,0.5);
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  padding: 0;
}
.toast-dismiss:hover { color: #fff; }

/* ============================================================
   CERTIFICATE
   ============================================================ */
.certificate-preview {
  background: linear-gradient(145deg, #FAFAFA, #FFFFFF);
  padding: var(--space-16) var(--space-12);
  border: 2px solid var(--color-primary-lighter);
  border-radius: var(--radius-2xl);
  text-align: center;
  box-shadow: var(--shadow-2xl), inset 0 0 0 8px var(--color-primary-lightest);
  position: relative;
  overflow: hidden;
}
.certificate-preview::before,
.certificate-preview::after {
  content: '';
  position: absolute;
  width: 120px; height: 120px;
  border-radius: var(--radius-full);
  background: var(--gradient-primary);
  opacity: 0.06;
}
.certificate-preview::before { top: -40px; left: -40px; }
.certificate-preview::after  { bottom: -40px; right: -40px; }

.certificate-seal {
  width: 80px; height: 80px;
  margin: 0 auto var(--space-6);
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: var(--text-3xl);
  box-shadow: var(--shadow-primary);
}
.certificate-title { font-size: var(--text-3xl); font-weight: var(--font-black); color: var(--color-gray-900); margin-bottom: var(--space-2); }
.certificate-subtitle { color: var(--color-gray-500); margin-bottom: var(--space-8); }
.certificate-recipient { font-size: var(--text-4xl); font-weight: var(--font-black); color: var(--color-primary); font-style: italic; margin-bottom: var(--space-4); }
.certificate-course { font-size: var(--text-xl); color: var(--color-gray-700); }
.certificate-date   { font-size: var(--text-sm); color: var(--color-gray-500); margin-top: var(--space-6); }

/* ============================================================
   SKELETON LOADER
   ============================================================ */
.skeleton-card {
  background: var(--color-surface);
  border-radius: var(--radius-2xl);
  border: 1px solid var(--color-gray-100);
  overflow: hidden;
}
.skeleton-thumbnail {
  height: 210px;
  background: linear-gradient(90deg, var(--color-gray-100) 25%, var(--color-gray-50) 50%, var(--color-gray-100) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.4s infinite;
}
.skeleton-body { padding: var(--space-5) var(--space-6); }
.skeleton-line {
  height: 12px;
  border-radius: var(--radius-full);
  background: linear-gradient(90deg, var(--color-gray-100) 25%, var(--color-gray-50) 50%, var(--color-gray-100) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.4s infinite;
  margin-bottom: var(--space-3);
}
.skeleton-line.w-75 { width: 75%; }
.skeleton-line.w-50 { width: 50%; }
.skeleton-line.w-33 { width: 33%; }
.skeleton-line.sm   { height: 8px; }
.skeleton-line.lg   { height: 20px; margin-bottom: var(--space-4); }

/* ============================================================
   BACK TO TOP
   ============================================================ */
.back-to-top {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  width: 48px;
  height: 48px;
  background: var(--gradient-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-xl);
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  box-shadow: var(--shadow-primary);
  z-index: var(--z-fixed);
  transition: all var(--transition-base);
}
.back-to-top:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 32px -4px rgb(79 70 229 / 0.5);
}
.back-to-top.visible { display: flex; animation: fadeInUp 0.3s var(--ease-out) both; }

/* ============================================================
   SKIP LINK
   ============================================================ */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  padding: var(--space-3) var(--space-5);
  background: var(--color-primary);
  color: #fff;
  font-weight: var(--font-semibold);
  font-size: var(--text-sm);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  z-index: var(--z-toast);
  text-decoration: none;
  transition: top var(--transition-fast);
}
.skip-link:focus { top: 0; }

/* ============================================================
   HIGH CONTRAST & REDUCED MOTION
   ============================================================ */
@media (prefers-contrast: high) {
  .btn   { border: 2px solid currentColor; }
  .card  { border: 1.5px solid var(--color-gray-700); }
  .badge { border: 1px solid currentColor; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ============================================================
   PRINT
   ============================================================ */
@media print {
  .site-header, .site-footer, .back-to-top, .mobile-menu-toggle,
  .toast-container, .course-nav-tabs { display: none !important; }
  body { background: #fff !important; color: #000 !important; }
  .container { max-width: 100%; padding: 0; }
  a { text-decoration: underline; }
  .certificate-preview { box-shadow: none; border: 1px solid #ccc; }
}