/* ==========================================================================
   DESIGN SYSTEM & VARIABLES - LEKHAPORA COACHING CENTER
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;600;700;800&family=Poppins:wght@300;400;500;600;700&display=swap');

:root {
  /* Fonts */
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Poppins', sans-serif;

  /* Colors (Light Mode Default) */
  --bg-primary: #f5f8ff;
  --bg-secondary: #ffffff;
  --bg-tertiary: #eef3ff;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  
  --primary-color: #0b3d91;
  --primary-rgb: 11, 61, 145;
  --primary-dark: #072c6c;
  --primary-light: #3b71ca;
  
  --accent-color: #ffb400;
  --accent-rgb: 255, 180, 0;
  --accent-secondary: #00f2fe;
  
  --card-shadow: 0 10px 30px rgba(11, 61, 145, 0.05);
  --card-hover-shadow: 0 20px 40px rgba(11, 61, 145, 0.12);
  --navbar-bg: rgba(255, 255, 255, 0.8);
  --border-color: #e2e8f0;
  --error-color: #ef4444;
  --success-color: #10b981;

  /* Spacing & Borders */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-round: 50px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Mode Overrides */
[data-theme="dark"] {
  --bg-primary: #090e1a;
  --bg-secondary: #111a2e;
  --bg-tertiary: #19253f;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  
  --primary-color: #3b71ca;
  --primary-rgb: 59, 113, 202;
  --primary-dark: #0b3d91;
  --primary-light: #60a5fa;
  
  --card-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  --card-hover-shadow: 0 20px 40px rgba(0, 0, 0, 0.45);
  --navbar-bg: rgba(17, 26, 46, 0.8);
  --border-color: #1e293b;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color 0.4s ease, color 0.4s ease;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
}

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

/* Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius-round);
  border: none;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  z-index: 1;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  color: #ffffff;
  box-shadow: 0 4px 15px rgba(var(--primary-rgb), 0.3);
}

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

.btn-secondary {
  background: linear-gradient(135deg, var(--accent-color), #f59e0b);
  color: #000000;
  box-shadow: 0 4px 15px rgba(var(--accent-rgb), 0.3);
}

.btn-secondary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(var(--accent-rgb), 0.4);
}

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

.btn-outline:hover {
  background: var(--primary-color);
  color: #ffffff;
  transform: translateY(-2px);
}

/* Navigation Header */
header.main-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: var(--navbar-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

header.main-header.scrolled {
  padding: 8px 0;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
  transition: var(--transition);
}

header.main-header.scrolled .nav-container {
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary-color);
  cursor: pointer;
}

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

.logo-icon {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 800;
  font-size: 1.3rem;
  box-shadow: 0 4px 10px rgba(var(--primary-rgb), 0.3);
}

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

.nav-links a {
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--text-primary);
  position: relative;
  padding: 6px 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--accent-color);
  transition: var(--transition);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* Theme Toggle */
.theme-toggle-btn {
  background: transparent;
  border: none;
  cursor: pointer;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-round);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  font-size: 1.2rem;
  transition: var(--transition);
  border: 1px solid var(--border-color);
}

.theme-toggle-btn:hover {
  background: var(--bg-tertiary);
  transform: rotate(15deg);
}

.theme-toggle-btn .sun-icon {
  display: none;
}

[data-theme="dark"] .theme-toggle-btn .sun-icon {
  display: block;
}

[data-theme="dark"] .theme-toggle-btn .moon-icon {
  display: none;
}

/* Hamburger Menu */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 30px;
  height: 21px;
  cursor: pointer;
  background: transparent;
  border: none;
  z-index: 1001;
}

.menu-toggle span {
  display: block;
  height: 3px;
  width: 100%;
  background-color: var(--text-primary);
  border-radius: 3px;
  transition: var(--transition);
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero-section {
  padding: 180px 0 100px 0;
  position: relative;
  overflow: hidden;
  background: radial-gradient(circle at 80% 20%, rgba(var(--primary-rgb), 0.08), transparent 45%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  padding: 6px 16px;
  border-radius: var(--radius-round);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 24px;
}

.hero-tag span {
  width: 8px;
  height: 8px;
  background-color: var(--accent-color);
  border-radius: 50%;
  display: inline-block;
  animation: pulseGlow 1.5s infinite;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 24px;
  letter-spacing: -1px;
}

.hero-title span {
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 36px;
  max-width: 580px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.hero-stats {
  display: flex;
  gap: 40px;
  border-top: 1px solid var(--border-color);
  padding-top: 30px;
}

.stat-item h3 {
  font-size: 2.2rem;
  color: var(--primary-color);
  font-weight: 800;
}

.stat-item p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* Credentials Floating Card */
.hero-card-container {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-glow-bg {
  position: absolute;
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, rgba(var(--primary-rgb), 0.25), transparent 70%);
  filter: blur(20px);
  z-index: 0;
  animation: float 6s ease-in-out infinite alternate;
}

.hero-card {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  padding: 32px;
  box-shadow: var(--card-hover-shadow);
  position: relative;
  z-index: 1;
  max-width: 380px;
  width: 100%;
  animation: float 8s ease-in-out infinite;
}

.badge-float {
  position: absolute;
  top: -20px;
  right: -20px;
  background: linear-gradient(135deg, var(--accent-color), #f59e0b);
  color: #000;
  padding: 10px 16px;
  font-weight: 700;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  box-shadow: 0 8px 20px rgba(var(--accent-rgb), 0.3);
  font-family: var(--font-heading);
}

.hero-card-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}

.avatar-wrapper {
  position: relative;
}

.avatar-wrapper img {
  width: 70px;
  height: 70px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--primary-color);
}

.avatar-wrapper::after {
  content: '';
  position: absolute;
  bottom: 0;
  right: 0;
  width: 16px;
  height: 16px;
  background-color: var(--success-color);
  border: 3px solid var(--bg-secondary);
  border-radius: 50%;
}

.card-title-sub {
  font-size: 0.8rem;
  color: var(--primary-color);
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 1px;
}

.card-title-main {
  font-size: 1.25rem;
  color: var(--text-primary);
  font-weight: 700;
}

.card-bullets {
  list-style: none;
}

.card-bullets li {
  margin-bottom: 12px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.card-bullets li svg {
  color: var(--success-color);
  flex-shrink: 0;
  margin-top: 3px;
}

/* ==========================================================================
   SECTIONS GENERAL
   ========================================================================== */
section.section-padding {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  max-width: 650px;
  margin: 0 auto 60px auto;
}

.section-subtitle {
  color: var(--primary-color);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  font-weight: 700;
  display: block;
  margin-bottom: 12px;
}

.section-title {
  font-size: 2.5rem;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.section-desc {
  color: var(--text-secondary);
  font-size: 1.05rem;
}

/* ==========================================================================
   ABOUT SECTION
   ========================================================================== */
.about-grid {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 60px;
  align-items: center;
}

.about-img-container {
  position: relative;
}

.about-img-frame {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--card-hover-shadow);
  border: 1px solid var(--border-color);
}

.about-img-frame img {
  width: 100%;
  height: 480px;
  object-fit: cover;
  display: block;
  transition: var(--transition);
}

.about-img-frame:hover img {
  transform: scale(1.03);
}

.about-img-deco {
  position: absolute;
  bottom: -20px;
  left: -20px;
  width: 100%;
  height: 100%;
  border: 3px solid var(--accent-color);
  border-radius: var(--radius-lg);
  z-index: -1;
  pointer-events: none;
}

.about-experience-badge {
  position: absolute;
  bottom: 30px;
  right: -20px;
  background: var(--primary-color);
  color: white;
  padding: 16px 24px;
  border-radius: var(--radius-md);
  box-shadow: 0 10px 25px rgba(var(--primary-rgb), 0.25);
  text-align: center;
  font-family: var(--font-heading);
}

.about-experience-badge h4 {
  font-size: 1.8rem;
  font-weight: 800;
}

.about-experience-badge p {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.about-meta {
  margin-top: 32px;
}

.bio-point {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
}

.bio-icon {
  width: 44px;
  height: 44px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-color);
  flex-shrink: 0;
}

.bio-info h4 {
  font-size: 1.1rem;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.bio-info p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* ==========================================================================
   DEPARTMENTS
   ========================================================================== */
.departments-section {
  background-color: var(--bg-secondary);
  position: relative;
}

.dept-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 32px;
}

.dept-card {
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  padding: 40px;
  transition: var(--transition);
  position: relative;
  display: flex;
  flex-direction: column;
}

.dept-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--card-hover-shadow);
}

.dept-header {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 24px;
}

.dept-icon {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.6rem;
}

.dept-card-math .dept-icon {
  background: linear-gradient(135deg, #3b71ca, var(--primary-color));
  box-shadow: 0 6px 15px rgba(11, 61, 145, 0.25);
}

.dept-card-cs .dept-icon {
  background: linear-gradient(135deg, #10b981, #059669);
  box-shadow: 0 6px 15px rgba(16, 185, 129, 0.25);
}

.dept-title {
  font-size: 1.45rem;
  color: var(--text-primary);
}

.dept-desc {
  color: var(--text-secondary);
  margin-bottom: 24px;
  font-size: 0.95rem;
}

.dept-features {
  list-style: none;
  margin-bottom: 32px;
  margin-top: auto;
}

.dept-features li {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
  font-size: 0.9rem;
  color: var(--text-primary);
}

.dept-card-math .dept-features li svg {
  color: var(--primary-color);
}

.dept-card-cs .dept-features li svg {
  color: #10b981;
}

/* ==========================================================================
   COURSES GRID & FILTER
   ========================================================================== */
.filter-tabs {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.filter-btn {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 10px 24px;
  border-radius: var(--radius-round);
  font-weight: 600;
  font-family: var(--font-heading);
  cursor: pointer;
  color: var(--text-secondary);
  transition: var(--transition);
}

.filter-btn:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.filter-btn.active {
  background: var(--primary-color);
  color: #ffffff;
  border-color: var(--primary-color);
  box-shadow: 0 4px 15px rgba(var(--primary-rgb), 0.2);
}

.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 32px;
}

.course-card {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  overflow: hidden;
  box-shadow: var(--card-shadow);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.course-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--card-hover-shadow);
}

.course-img-wrapper {
  position: relative;
  height: 200px;
  overflow: hidden;
  background-color: var(--bg-tertiary);
}

.course-img-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

.course-card:hover .course-img-wrapper img {
  transform: scale(1.05);
}

.course-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  background: rgba(var(--primary-rgb), 0.95);
  color: #ffffff;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.75rem;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.course-content {
  padding: 28px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.course-meta {
  display: flex;
  justify-content: space-between;
  margin-bottom: 12px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--primary-color);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.course-title {
  font-size: 1.25rem;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.course-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
  flex-grow: 1;
}

.course-footer {
  border-top: 1px solid var(--border-color);
  padding-top: 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.course-price {
  font-family: var(--font-heading);
  font-size: 0.9rem;
  color: var(--text-primary);
  font-weight: 600;
}

.course-price span {
  color: var(--accent-color);
  font-weight: 700;
}

/* ==========================================================================
   INTERACTIVE LAB SECTION
   ========================================================================== */
.lab-section {
  background-color: var(--bg-tertiary);
}

.lab-container {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  box-shadow: var(--card-hover-shadow);
  overflow: hidden;
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
}

.lab-info-panel {
  padding: 48px;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  color: white;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.lab-info-panel h3 {
  font-size: 2rem;
  margin-bottom: 16px;
}

.lab-info-panel p {
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 28px;
  font-size: 0.95rem;
}

.lab-nav-tabs {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.lab-tab-btn {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  color: white;
  font-family: var(--font-heading);
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 16px;
}

.lab-tab-btn:hover {
  background: rgba(255, 255, 255, 0.18);
}

.lab-tab-btn.active {
  background: var(--accent-color);
  color: #000000;
  border-color: var(--accent-color);
  box-shadow: 0 8px 20px rgba(var(--accent-rgb), 0.25);
}

.lab-tab-btn svg {
  flex-shrink: 0;
}

.lab-playground-panel {
  padding: 48px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 420px;
  position: relative;
}

.lab-content {
  display: none;
  animation: fadeIn 0.4s ease-in-out;
}

.lab-content.active {
  display: block;
}

/* Quiz Styling */
.quiz-question-box {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-bottom: 24px;
}

.quiz-badge {
  display: inline-block;
  background: var(--bg-tertiary);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 12px;
  text-transform: uppercase;
}

.quiz-question {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.quiz-options {
  display: grid;
  gap: 12px;
}

.quiz-option-btn {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 12px 18px;
  text-align: left;
  font-family: var(--font-body);
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition);
  color: var(--text-primary);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.quiz-option-btn:hover {
  background: var(--bg-tertiary);
  border-color: var(--primary-color);
}

.quiz-option-btn.selected {
  border-color: var(--primary-color);
  background-color: var(--bg-tertiary);
}

.quiz-option-btn.correct {
  background-color: rgba(16, 185, 129, 0.1);
  border-color: var(--success-color);
  color: var(--success-color);
  font-weight: 600;
}

.quiz-option-btn.wrong {
  background-color: rgba(239, 68, 68, 0.1);
  border-color: var(--error-color);
  color: var(--error-color);
}

.quiz-feedback {
  margin-top: 16px;
  padding: 12px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  display: none;
}

.quiz-feedback.show {
  display: flex;
  align-items: center;
  gap: 8px;
}

.quiz-feedback-success {
  background: rgba(16, 185, 129, 0.1);
  color: var(--success-color);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.quiz-feedback-error {
  background: rgba(239, 68, 68, 0.1);
  color: var(--error-color);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

/* ==========================================================================
   TESTIMONIALS SLIDER
   ========================================================================== */
.testimonials-section {
  background-color: var(--bg-secondary);
  overflow: hidden;
}

.testimonials-wrapper {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
}

.testimonial-track {
  display: flex;
  transition: transform 0.5s ease-in-out;
}

.testimonial-slide {
  min-width: 100%;
  padding: 20px;
  text-align: center;
}

.testimonial-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 48px;
  position: relative;
  box-shadow: var(--card-shadow);
}

.quote-icon {
  font-size: 3rem;
  color: rgba(var(--primary-rgb), 0.1);
  position: absolute;
  top: 20px;
  left: 30px;
  line-height: 1;
}

.testimonial-text {
  font-size: 1.15rem;
  color: var(--text-primary);
  font-style: italic;
  margin-bottom: 28px;
  position: relative;
  z-index: 1;
}

.testimonial-author {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.author-name {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--primary-color);
}

.author-role {
  font-size: 0.8rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  margin-top: 4px;
  letter-spacing: 0.5px;
}

.testimonial-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 24px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--border-color);
  cursor: pointer;
  transition: var(--transition);
}

.dot.active {
  background-color: var(--primary-color);
  width: 24px;
  border-radius: 5px;
}

/* ==========================================================================
   FAQ ACCORDION
   ========================================================================== */
.faq-grid {
  max-width: 850px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--card-shadow);
  transition: var(--transition);
}

.faq-header {
  padding: 24px 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  transition: var(--transition);
}

.faq-header:hover {
  background-color: var(--bg-tertiary);
}

.faq-question {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
}

.faq-icon-wrapper {
  background: var(--bg-tertiary);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-color);
  transition: var(--transition);
  flex-shrink: 0;
}

.faq-item.active .faq-icon-wrapper {
  transform: rotate(180deg);
  background-color: var(--primary-color);
  color: white;
}

.faq-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out;
}

.faq-content {
  padding: 0 30px 24px 30px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  border-top: 1px solid transparent;
}

.faq-item.active .faq-content {
  border-top-color: var(--border-color);
}

/* ==========================================================================
   CONTACT & ENROLLMENT FORM
   ========================================================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 48px;
}

.contact-info-panel {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  color: white;
  padding: 48px;
  border-radius: var(--radius-lg);
  box-shadow: var(--card-hover-shadow);
  display: flex;
  flex-direction: column;
}

.contact-info-panel h3 {
  font-size: 2rem;
  margin-bottom: 16px;
}

.contact-info-panel p {
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 40px;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 28px;
  margin-bottom: 40px;
}

.contact-link-item {
  display: flex;
  align-items: flex-start;
  gap: 20px;
}

.contact-link-icon {
  background: rgba(255, 255, 255, 0.1);
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-color);
  flex-shrink: 0;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.contact-link-text h4 {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.55);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}

.contact-link-text p {
  font-size: 1.05rem;
  color: white;
  margin: 0;
}

.contact-link-text a:hover {
  color: var(--accent-color);
}

.social-links {
  display: flex;
  gap: 16px;
  margin-top: auto;
}

.social-icon {
  background: rgba(255, 255, 255, 0.1);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  transition: var(--transition);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.social-icon:hover {
  background-color: var(--accent-color);
  color: #000;
  transform: translateY(-3px);
}

/* Enrollment Form Card */
.enroll-card {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  padding: 48px;
  box-shadow: var(--card-shadow);
}

.enroll-card h3 {
  font-size: 1.8rem;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.enroll-card p {
  color: var(--text-secondary);
  margin-bottom: 32px;
  font-size: 0.95rem;
}

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

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.form-input {
  width: 100%;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--text-primary);
  transition: var(--transition);
}

.form-input:focus {
  outline: none;
  border-color: var(--primary-color);
  background-color: var(--bg-secondary);
  box-shadow: 0 0 0 4px rgba(var(--primary-rgb), 0.1);
}

select.form-input {
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23475569' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 18px center;
  background-size: 16px;
  padding-right: 48px;
}

[data-theme="dark"] select.form-input {
  background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
}

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

/* Success Popup Alert */
.success-popup {
  position: fixed;
  top: 24px;
  right: 24px;
  background: var(--bg-secondary);
  border-left: 4px solid var(--success-color);
  padding: 16px 24px;
  border-radius: var(--radius-sm);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
  display: flex;
  align-items: center;
  gap: 16px;
  z-index: 2000;
  transform: translateX(120%);
  transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.success-popup.show {
  transform: translateX(0);
}

.success-popup-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(16, 185, 129, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--success-color);
}

.success-popup-text h4 {
  font-size: 0.95rem;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.success-popup-text p {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin: 0;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
footer.main-footer {
  background-color: #051430;
  color: #94a3b8;
  padding: 80px 0 30px 0;
  border-top: 1px solid #112240;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 0.8fr 1.2fr;
  gap: 40px;
  margin-bottom: 60px;
}

.footer-col h4 {
  color: white;
  font-size: 1.1rem;
  margin-bottom: 24px;
  font-family: var(--font-heading);
}

.footer-about p {
  font-size: 0.9rem;
  line-height: 1.6;
  margin-bottom: 24px;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 12px;
}

.footer-links a {
  font-size: 0.9rem;
}

.footer-links a:hover {
  color: var(--accent-color);
  padding-left: 4px;
}

.footer-contact-list {
  list-style: none;
}

.footer-contact-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 16px;
  font-size: 0.9rem;
}

.footer-contact-list li svg {
  color: var(--accent-color);
  flex-shrink: 0;
  margin-top: 4px;
}

.footer-bottom {
  border-top: 1px solid #112240;
  padding-top: 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
  font-size: 0.85rem;
}

/* Floating Actions */
.floating-actions {
  position: fixed;
  bottom: 24px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: 999;
}

.floating-btn {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
  transition: var(--transition);
  cursor: pointer;
}

.whatsapp-btn {
  background-color: #25d366;
}

.whatsapp-btn:hover {
  background-color: #20ba5a;
  transform: scale(1.08);
}

.back-to-top-btn {
  background-color: var(--primary-color);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
}

.back-to-top-btn.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top-btn:hover {
  background-color: var(--primary-dark);
  transform: scale(1.08);
}

/* ==========================================================================
   ANIMATIONS & MEDIA QUERIES
   ========================================================================== */
@keyframes float {
  0% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
  100% { transform: translateY(0px); }
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes pulseGlow {
  0% { transform: scale(0.9); opacity: 0.6; box-shadow: 0 0 0 0 rgba(var(--accent-rgb), 0.4); }
  70% { transform: scale(1); opacity: 1; box-shadow: 0 0 0 8px rgba(var(--accent-rgb), 0); }
  100% { transform: scale(0.9); opacity: 0.6; box-shadow: 0 0 0 0 rgba(var(--accent-rgb), 0); }
}

/* Responsive Styles */
@media (max-width: 1024px) {
  .hero-grid,
  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  
  .hero-section {
    padding: 140px 0 80px 0;
    text-align: center;
  }
  
  .hero-desc {
    margin: 0 auto 36px auto;
  }
  
  .hero-buttons {
    justify-content: center;
  }
  
  .hero-stats {
    justify-content: center;
  }
  
  .about-img-container {
    max-width: 500px;
    margin: 0 auto;
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .lab-container {
    grid-template-columns: 1fr;
  }
  
  .lab-info-panel {
    padding: 36px;
  }
  
  .lab-nav-tabs {
    flex-direction: row;
    overflow-x: auto;
    padding-bottom: 8px;
  }
  
  .lab-tab-btn {
    white-space: nowrap;
  }
  
  .lab-playground-panel {
    padding: 36px;
  }
}

@media (max-width: 768px) {
  html {
    font-size: 15px;
  }
  
  .hero-title {
    font-size: 2.6rem;
  }
  
  .menu-toggle {
    display: flex;
  }
  
  .nav-links {
    position: fixed;
    top: 80px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 80px);
    background: var(--bg-secondary);
    flex-direction: column;
    padding: 40px;
    gap: 28px;
    align-items: flex-start;
    transition: var(--transition);
    border-top: 1px solid var(--border-color);
  }
  
  header.main-header.scrolled .nav-links {
    top: 64px;
    height: calc(100vh - 64px);
  }
  
  .nav-links.active {
    left: 0;
  }
  
  .theme-toggle-btn {
    order: -1;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
  }
  
  .enroll-card,
  .testimonial-card,
  .contact-info-panel {
    padding: 24px;
  }
}