/* style.css - Premium E-Learning Design System */
@import url('https://fonts.googleapis.com/css2?family=Alex+Brush&family=Playfair+Display:ital,wght@0,600;0,700;1,600&family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700;800&display=swap');

:root {
  --bg-primary: #08080c;
  --bg-secondary: #0f0f15;
  --bg-tertiary: #161622;
  --accent-gold: #d4af37;
  --accent-gold-glow: rgba(212, 175, 55, 0.35);
  --accent-neon-blue: #00f2fe;
  --accent-neon-blue-glow: rgba(0, 242, 254, 0.4);
  --accent-violet: #7f00ff;
  --accent-violet-glow: rgba(127, 0, 255, 0.4);
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --border-glass: rgba(255, 255, 255, 0.08);
  --bg-glass: rgba(15, 15, 21, 0.7);
  --font-display: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;
  --shadow-premium: 0 10px 40px -10px rgba(0, 0, 0, 0.7);
  --radius-lg: 16px;
  --radius-md: 10px;
  --transition-smooth: all 0.35s cubic-bezier(0.25, 0.8, 0.25, 1);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-main);
  font-family: var(--font-body);
  overflow-x: hidden;
  line-height: 1.6;
}

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

a {
  text-decoration: none;
  color: inherit;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--bg-tertiary);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-neon-blue);
}

/* Glassmorphism Classes */
.glass-panel {
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-premium);
}

.glass-card {
  background: linear-gradient(135deg, rgba(22, 22, 34, 0.6) 0%, rgba(15, 15, 21, 0.8) 100%);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
  transition: var(--transition-smooth);
}

.glass-card:hover {
  border-color: rgba(0, 242, 254, 0.3);
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 242, 254, 0.1);
}

/* Glow Elements */
.glow-text {
  text-shadow: 0 0 15px var(--accent-neon-blue-glow);
}
.glow-text-gold {
  text-shadow: 0 0 15px var(--accent-gold-glow);
}

/* Common Layout Components */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}



.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.logo {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 800;
  background: linear-gradient(90deg, #fff 0%, var(--accent-neon-blue) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo span {
  color: var(--accent-gold);
  background: linear-gradient(90deg, var(--accent-gold) 0%, #ffe885 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ─── LEYA Ecommerce Academy Logo Styles ─────────── */

/* Navbar logosu — büyük ve net (Tamamen Beyaz) */
.site-logo-nav {
  height: 70px;
  width: auto;
  object-fit: contain;
  /* Logoyu tamamen beyaza çeviren sihirli filtre */
  filter: brightness(0) invert(1) drop-shadow(0 2px 4px rgba(255, 255, 255, 0.1));
  transition: all 0.3s ease;
}

.site-logo-nav:hover {
  filter: brightness(0) invert(1) drop-shadow(0 0px 10px rgba(255, 255, 255, 0.4));
  transform: scale(1.03);
}

/* Footer logosu — okunabilir ve orantılı (Tamamen Beyaz) */
.site-logo-footer {
  height: 90px; /* Footer'da okunaklı olması için boyutu artırıldı */
  width: auto;
  object-fit: contain;
  filter: brightness(0) invert(1);
  opacity: 0.9;
  transition: all 0.3s ease;
}

.site-logo-footer:hover {
  opacity: 1;
  filter: brightness(0) invert(1) drop-shadow(0 0px 8px rgba(255, 255, 255, 0.3));
}

/* Navbar yüksekliğini logoya göre ayarla */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  height: 90px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--border-glass);
  background: rgba(8, 8, 12, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
  align-items: center;
}

.nav-link {
  font-weight: 500;
  font-size: 15px;
  color: var(--text-muted);
  transition: var(--transition-smooth);
}

.nav-link:hover, .nav-link.active {
  color: var(--text-main);
  text-shadow: 0 0 8px rgba(255, 255, 255, 0.5);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-violet) 0%, var(--accent-neon-blue) 100%);
  color: #fff;
  border: none;
  padding: 12px 28px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 15px;
  border-radius: var(--radius-md);
  cursor: pointer;
  box-shadow: 0 4px 20px var(--accent-violet-glow);
  transition: var(--transition-smooth);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 242, 254, 0.4);
}

.btn-secondary {
  background: transparent;
  border: 1px solid var(--border-glass);
  color: var(--text-main);
  padding: 12px 28px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 15px;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition-smooth);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--text-main);
}

.btn-gold {
  background: linear-gradient(135deg, var(--accent-gold) 0%, #ffe066 100%);
  color: #08080c;
  border: none;
  padding: 12px 28px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  border-radius: var(--radius-md);
  cursor: pointer;
  box-shadow: 0 4px 20px var(--accent-gold-glow);
  transition: var(--transition-smooth);
}

.btn-gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px var(--accent-gold-glow);
}

/* --- LANDING PAGE STYLES --- */
.hero {
  padding: 160px 0 100px 0;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -10%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(127, 0, 255, 0.15) 0%, rgba(0, 242, 254, 0.05) 50%, rgba(8, 8, 12, 0) 100%);
  z-index: -1;
  pointer-events: none;
}

.hero-content {
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}

.hero-badge {
  background: rgba(212, 175, 55, 0.1);
  border: 1px solid var(--accent-gold);
  color: var(--accent-gold);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 14px;
  text-transform: uppercase;
  padding: 6px 18px;
  border-radius: 50px;
  display: inline-block;
  margin-bottom: 24px;
  letter-spacing: 0.05em;
  box-shadow: 0 0 10px rgba(212, 175, 55, 0.15);
}

.hero-title {
  font-size: 64px;
  line-height: 1.15;
  margin-bottom: 24px;
  font-weight: 800;
  background: linear-gradient(135deg, #ffffff 0%, #a5b4fc 50%, #818cf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 20px;
  color: var(--text-muted);
  margin-bottom: 40px;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
}

/* Counters Section */
.counters-section {
  padding: 40px 0;
  border-top: 1px solid var(--border-glass);
  border-bottom: 1px solid var(--border-glass);
  background: rgba(15, 15, 21, 0.5);
}

.counters-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  text-align: center;
}

.counter-item h3 {
  font-size: 48px;
  font-weight: 800;
  background: linear-gradient(90deg, #fff 0%, var(--accent-neon-blue) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 8px;
}

.counter-item p {
  color: var(--text-muted);
  font-size: 15px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Courses Grid Section */
.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-header h2 {
  font-size: 40px;
  margin-bottom: 16px;
  background: linear-gradient(90deg, #fff 0%, #a5b4fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-header p {
  color: var(--text-muted);
  font-size: 16px;
  max-width: 600px;
  margin: 0 auto;
}

.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 30px;
  margin-bottom: 80px;
}

.course-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 24px;
}

.course-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 16px;
}

.course-badge {
  background: rgba(0, 242, 254, 0.1);
  border: 1px solid rgba(0, 242, 254, 0.3);
  color: var(--accent-neon-blue);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 4px;
}

.course-card h3 {
  font-size: 22px;
  margin-bottom: 12px;
  color: #fff;
}

.course-description {
  color: var(--text-muted);
  font-size: 14px;
  margin-bottom: 24px;
  flex-grow: 1;
}

.course-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--border-glass);
  padding-top: 16px;
  margin-bottom: 20px;
}

.course-lessons {
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

.course-price {
  font-size: 24px;
  font-weight: 800;
  color: var(--accent-gold);
  font-family: var(--font-display);
}

.course-btn {
  width: 100%;
  text-align: center;
  padding: 12px;
  border-radius: var(--radius-md);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 14px;
  cursor: pointer;
  transition: var(--transition-smooth);
}

/* Feedbacks / Yorumlar */
.feedbacks-section {
  padding: 100px 0;
  background: linear-gradient(180deg, var(--bg-primary) 0%, rgba(15, 15, 21, 0.8) 100%);
}

.feedback-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.feedback-card {
  padding: 30px;
  display: flex;
  flex-direction: column;
}

.feedback-quote {
  font-style: italic;
  font-size: 15px;
  color: var(--text-main);
  margin-bottom: 24px;
  flex-grow: 1;
  position: relative;
}

.feedback-quote::before {
  content: '“';
  font-size: 60px;
  color: rgba(255, 255, 255, 0.05);
  position: absolute;
  top: -30px;
  left: -15px;
  font-family: var(--font-display);
}

.feedback-user {
  display: flex;
  align-items: center;
  gap: 16px;
  border-top: 1px solid var(--border-glass);
  padding-top: 16px;
}

.feedback-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-glass);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--accent-neon-blue);
  background-size: cover;
  background-position: center;
}

.feedback-info h4 {
  font-size: 15px;
  color: #fff;
}

.feedback-info p {
  font-size: 12px;
  color: var(--text-muted);
}

/* Modals */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(5, 5, 8, 0.85);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition-smooth);
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: all;
}

.modal-content {
  width: 100%;
  max-width: 440px;
  padding: 40px;
  transform: translateY(20px);
  transition: var(--transition-smooth);
}

.modal-overlay.active .modal-content {
  transform: translateY(0);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.modal-header h3 {
  font-size: 24px;
  color: #fff;
}

.modal-close {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 24px;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.modal-close:hover {
  color: #fff;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.form-input {
  width: 100%;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  color: #fff;
  font-family: var(--font-body);
  font-size: 15px;
  transition: var(--transition-smooth);
}

.form-input:focus {
  outline: none;
  border-color: var(--accent-neon-blue);
  box-shadow: 0 0 10px rgba(0, 242, 254, 0.15);
}

.modal-btn {
  width: 100%;
  margin-top: 10px;
}

/* Footer */
footer {
  border-top: 1px solid var(--border-glass);
  padding: 40px 0;
  text-align: center;
  background: var(--bg-secondary);
}

footer p {
  color: var(--text-muted);
  font-size: 14px;
}


/* --- STUDENT PORTAL LAYOUT --- */
.app-layout {
  display: flex;
  min-height: 100vh;
  padding-top: 80px;
  background: var(--bg-primary);
}

.student-sidebar {
  width: 320px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-glass);
  height: calc(100vh - 80px);
  position: fixed;
  overflow-y: auto;
  padding: 24px 16px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.student-content {
  flex-grow: 1;
  margin-left: 320px;
  padding: 40px;
  overflow-y: auto;
  max-width: 1200px;
}

/* Sidebar Lesson Menu */
.sidebar-title {
  font-size: 18px;
  color: #fff;
  border-bottom: 1px solid var(--border-glass);
  padding-bottom: 12px;
  margin-bottom: 12px;
}

.course-select-box {
  width: 100%;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-glass);
  color: #fff;
  padding: 10px;
  border-radius: var(--radius-md);
  font-family: var(--font-display);
  font-weight: 600;
  outline: none;
}

.lesson-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  list-style: none;
}

.lesson-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition-smooth);
  border: 1px solid transparent;
}

.lesson-item:hover {
  background: rgba(255, 255, 255, 0.03);
  border-color: rgba(255, 255, 255, 0.05);
}

.lesson-item.active {
  background: rgba(0, 242, 254, 0.06);
  border-color: rgba(0, 242, 254, 0.2);
  color: var(--accent-neon-blue);
}

.lesson-checkbox {
  width: 18px;
  height: 18px;
  border-radius: 4px;
  border: 2px solid var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.lesson-item.completed .lesson-checkbox {
  background: var(--accent-neon-blue);
  border-color: var(--accent-neon-blue);
  color: #08080c;
}

.lesson-checkbox svg {
  width: 12px;
  height: 12px;
  stroke: #08080c;
  stroke-width: 3px;
  fill: none;
  display: none;
}

.lesson-item.completed .lesson-checkbox svg {
  display: block;
}

.lesson-item-info {
  display: flex;
  flex-direction: column;
  flex-grow: 1;
  overflow: hidden;
}

.lesson-item-title {
  font-size: 13.5px;
  font-weight: 500;
  white-space: nowrap;
  text-overflow: ellipsis;
  overflow: hidden;
}

.lesson-item-duration {
  font-size: 11px;
  color: var(--text-muted);
}

/* Progress Tracker */
.student-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 30px;
}

.student-progress-wrapper {
  background: var(--bg-secondary);
  padding: 20px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-glass);
  margin-bottom: 30px;
}

.progress-header {
  display: flex;
  justify-content: space-between;
  font-size: 14px;
  margin-bottom: 10px;
  font-weight: 600;
}

.progress-bar-container {
  width: 100%;
  height: 8px;
  background: var(--bg-tertiary);
  border-radius: 50px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent-violet) 0%, var(--accent-neon-blue) 100%);
  border-radius: 50px;
  transition: width 0.5s cubic-bezier(0.25, 0.8, 0.25, 1);
  box-shadow: 0 0 10px var(--accent-neon-blue-glow);
}

/* Video Player */
.video-container {
  position: relative;
  width: 100%;
  background: #000;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-premium);
  border: 1px solid var(--border-glass);
  margin-bottom: 30px;
  aspect-ratio: 16/9;
}

.video-container video {
  width: 100%;
  height: 100%;
  display: block;
}

/* Locked Document Viewer */
.document-viewer {
  padding: 30px;
  margin-top: 30px;
}

.document-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-glass);
  padding-bottom: 16px;
  margin-bottom: 20px;
}

.document-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  color: #fff;
}

.document-badge {
  background: rgba(214, 175, 55, 0.1);
  border: 1px solid rgba(214, 175, 55, 0.3);
  color: var(--accent-gold);
  padding: 4px 12px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
}

.document-content-box {
  background: rgba(8, 8, 12, 0.8);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 24px;
  color: var(--text-main);
  min-height: 150px;
  user-select: none;
  -webkit-user-select: none;
  position: relative;
  font-size: 14.5px;
}

.document-locked-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(15, 15, 21, 0.95);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  border-radius: var(--radius-md);
}

.document-locked-overlay svg {
  width: 36px;
  height: 36px;
  stroke: var(--accent-gold);
}


/* --- ADMIN PANEL LAYOUT --- */
.admin-sidebar {
  width: 260px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-glass);
  height: calc(100vh - 80px);
  position: fixed;
  padding: 24px 16px;
}

.admin-menu {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.admin-menu-item {
  padding: 12px 16px;
  border-radius: var(--radius-md);
  font-weight: 500;
  font-size: 15px;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition-smooth);
}

.admin-menu-item.active, .admin-menu-item:hover {
  background: rgba(255, 255, 255, 0.04);
  color: #fff;
}

.admin-menu-item.active {
  border-left: 3px solid var(--accent-neon-blue);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.admin-content {
  margin-left: 260px;
  padding: 40px;
  flex-grow: 1;
  overflow-y: auto;
}

/* Stats Cards */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 40px;
}

.stat-card {
  padding: 24px;
}

.stat-card-label {
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.stat-card-value {
  font-size: 28px;
  font-weight: 800;
  font-family: var(--font-display);
}

/* Charts Grid */
.charts-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 30px;
  margin-bottom: 40px;
}

.chart-card {
  padding: 24px;
}

.chart-container {
  height: 300px;
  position: relative;
}

/* Students Table */
.panel-header-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.table-filter-group {
  display: flex;
  gap: 12px;
}

.select-filter {
  background: var(--bg-secondary);
  border: 1px solid var(--border-glass);
  color: #fff;
  padding: 8px 16px;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 14px;
  outline: none;
}

.search-input {
  background: var(--bg-secondary);
  border: 1px solid var(--border-glass);
  color: #fff;
  padding: 8px 16px;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 14px;
  outline: none;
  width: 240px;
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 10px;
}

.admin-table th, .admin-table td {
  padding: 16px;
  text-align: left;
  border-bottom: 1px solid var(--border-glass);
}

.admin-table th {
  background: rgba(255, 255, 255, 0.02);
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--text-muted);
  font-size: 14px;
}

.admin-table td {
  font-size: 14px;
}

.student-progress-cell {
  display: flex;
  flex-direction: column;
  gap: 4px;
  width: 200px;
}

.course-progress-mini {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
}

.progress-bar-mini {
  height: 4px;
  background: var(--bg-tertiary);
  border-radius: 10px;
  overflow: hidden;
}

.progress-fill-mini {
  height: 100%;
  border-radius: 10px;
  background: var(--accent-neon-blue);
}

/* Checkbox Course Group for Student Add Form */
.course-checkbox-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  background: var(--bg-secondary);
  padding: 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-glass);
}

.course-checkbox-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
}

.course-checkbox-item input {
  width: 16px;
  height: 16px;
  accent-color: var(--accent-neon-blue);
}

/* Celebrations / Confetti Modal */
.celebration-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(5, 5, 8, 0.9);
  backdrop-filter: blur(10px);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition-smooth);
}

.celebration-modal.active {
  opacity: 1;
  pointer-events: all;
}

.celebration-card {
  text-align: center;
  padding: 50px 40px;
  max-width: 500px;
  width: 90%;
  transform: scale(0.8);
  transition: var(--transition-smooth);
}

.celebration-modal.active .celebration-card {
  transform: scale(1);
}

.celebration-icon {
  font-size: 72px;
  margin-bottom: 20px;
  animation: pulse 1.5s infinite;
}

.celebration-title {
  font-size: 28px;
  color: #fff;
  margin-bottom: 12px;
  background: linear-gradient(135deg, var(--accent-gold) 0%, #fff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.celebration-desc {
  color: var(--text-muted);
  font-size: 15px;
  margin-bottom: 30px;
}

@keyframes pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.1); }
  100% { transform: scale(1); }
}

/* Custom Checkbox Toggle for Student Video Mark */
.lesson-mark-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-glass);
  padding: 10px 18px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.lesson-mark-btn.completed {
  background: rgba(0, 242, 254, 0.1);
  border-color: var(--accent-neon-blue);
  color: var(--accent-neon-blue);
}

/* Utility classes */
.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

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

/* Responsiveness */
@media (max-width: 992px) {
  .hero-title {
    font-size: 48px;
  }
  .counters-grid {
    gap: 20px;
  }
  .feedback-grid {
    grid-template-columns: 1fr;
  }
  .charts-grid {
    grid-template-columns: 1fr;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .app-layout {
    flex-direction: column;
  }
  .student-sidebar {
    width: 100%;
    height: auto;
    position: relative;
    border-right: none;
    border-bottom: 1px solid var(--border-glass);
  }
  .student-content {
    margin-left: 0;
    padding: 20px;
  }
  .admin-sidebar {
    width: 100%;
    height: auto;
    position: relative;
    border-right: none;
    border-bottom: 1px solid var(--border-glass);
  }
  .admin-content {
    margin-left: 0;
    padding: 20px;
  }
  .hero-buttons {
    flex-direction: column;
  }
  .counters-grid {
    grid-template-columns: 1fr;
  }
}

/* --- PREMIUM CERTIFICATE STYLES --- */
.certificate-template {
  width: 800px;
  height: 560px;
  background-color: #fdfbf7;
  background-image: radial-gradient(rgba(244, 240, 230, 0.15) 1px, transparent 0),
                    radial-gradient(rgba(244, 240, 230, 0.15) 1px, transparent 0);
  background-size: 8px 8px;
  background-position: 0 0, 4px 4px;
  color: #1d3557;
  position: relative;
  padding: 24px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.35);
  border-radius: 4px;
  user-select: none;
  -webkit-user-select: none;
  box-sizing: border-box;
}

.cert-border-outer {
  border: 1px solid rgba(184, 144, 71, 0.5);
  padding: 14px;
  height: 100%;
  width: 100%;
  border-radius: 4px;
  box-sizing: border-box;
  position: relative;
}

/* Gold Corner Accents */
.cert-corner {
  position: absolute;
  width: 24px;
  height: 24px;
  border-color: #b89047;
  border-style: solid;
}
.cert-corner-tl { top: 8px; left: 8px; border-width: 2px 0 0 2px; }
.cert-corner-tr { top: 8px; right: 8px; border-width: 2px 2px 0 0; }
.cert-corner-bl { bottom: 8px; left: 8px; border-width: 0 0 2px 2px; }
.cert-corner-br { bottom: 8px; right: 8px; border-width: 0 2px 2px 0; }

.cert-border-inner {
  border: 2px solid #1d3557;
  padding: 20px 24px 20px 24px;
  height: 100%;
  width: 100%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-sizing: border-box;
  align-items: center;
  overflow: hidden;
}

.cert-badge-wrapper {
  margin-top: -36px; /* Offset to overlap slightly over border */
  z-index: 10;
  position: relative;
  background: #fdfbf7;
  padding: 0 10px;
}

.cert-title {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 800;
  color: #b89047;
  letter-spacing: 3px;
  text-shadow: 0 1px 2px rgba(0,0,0,0.05);
  margin-bottom: 2px;
}

.cert-subtitle {
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 700;
  color: #64748b;
  letter-spacing: 2px;
}

.cert-student-name {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 34px;
  font-weight: 700;
  font-style: italic;
  color: #1d3557;
  margin: 12px auto;
  border-bottom: 2px solid rgba(184, 144, 71, 0.4);
  padding-bottom: 4px;
  width: fit-content;
  max-width: 90%;
  letter-spacing: 0.5px;
}

.cert-text {
  font-family: var(--font-body);
  font-size: 13.5px;
  color: #475569;
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.8;
}

.cert-footer {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  width: 100%;
  margin-top: 0;
  padding-top: 14px;
  border-top: 1.5px solid rgba(29, 53, 87, 0.15);
  box-sizing: border-box;
}

.cert-signature-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  min-width: 220px;
}

.cert-signature-line {
  border-bottom: 1.5px solid #1d3557;
  width: 100%;
  padding-bottom: 4px;
  margin-bottom: 8px;
  display: flex;
  justify-content: center;
  align-items: flex-end;
  height: 48px;
}

.cert-sig-font {
  font-family: 'Alex Brush', cursive;
  font-size: 38px;
  color: #1d3557;
  line-height: 1;
}

.cert-sig-name {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  color: #1d3557;
  letter-spacing: 0.5px;
}

.cert-sig-title {
  font-family: var(--font-body);
  font-size: 10px;
  color: #64748b;
}

/* WhatsApp Floating Button */
.whatsapp-float {
  position: fixed;
  width: 60px;
  height: 60px;
  bottom: 30px;
  right: 30px;
  background-color: #25d366;
  color: #FFF;
  border-radius: 50%;
  text-align: center;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  text-decoration: none;
}

.whatsapp-float:hover {
  transform: scale(1.1) rotate(5deg);
  background-color: #20ba5a;
  box-shadow: 0 6px 20px rgba(37, 211, 102, 0.5);
}

.whatsapp-icon {
  width: 32px;
  height: 32px;
}