/* CSS Custom Properties */
:root {
  /* Color Palette */
  --color-bg-primary: #0a0e27;
  --color-bg-secondary: #151a35;
  --color-bg-card: rgba(255, 255, 255, 0.05);

  --color-primary: #6366f1;
  --color-secondary: #8b5cf6;
  --color-accent: #06b6d4;
  --color-accent-2: #10b981;

  --color-text-primary: #ffffff;
  --color-text-secondary: #cbd5e1;
  --color-text-muted: #94a3b8;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --gradient-accent: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);

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

  /* Typography */
  --font-primary: 'Inter', sans-serif;
  --font-bangla: 'Hind Siliguri', sans-serif;

  --font-size-xs: 0.875rem;
  --font-size-sm: 1rem;
  --font-size-md: 1.125rem;
  --font-size-lg: 1.25rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;
  --font-size-3xl: 2.5rem;
  --font-size-4xl: 3rem;
  --font-size-5xl: 3.5rem;

  /* Effects */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 20px rgba(102, 126, 234, 0.3);

  --border-radius-sm: 8px;
  --border-radius-md: 12px;
  --border-radius-lg: 16px;
  --border-radius-xl: 24px;

  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* ========================================
   Reset & Base Styles
   ======================================== */

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  scroll-padding-top: 100px;
}

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

/* Bangla Text Support */
.bangla-text,
[lang="bn"] {
  font-family: var(--font-bangla);
}

/* ========================================
   Typography
   ======================================== */

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

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

h2 {
  font-size: var(--font-size-4xl);
}

h3 {
  font-size: var(--font-size-2xl);
}

p {
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-secondary);
}

.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ========================================
   Layout Components
   ======================================== */



.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.section {
  padding: var(--spacing-3xl) 0;
  position: relative;
}

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.section-subtitle {
  text-align: center;
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto var(--spacing-2xl);
}

/* ========================================
   Navbar
   ======================================== */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 14, 39, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  transition: all var(--transition-normal);
}

.navbar.scrolled {
  background: rgba(10, 14, 39, 0.98);
  box-shadow: var(--shadow-md);
}


.navbar-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-sm) 0;
}

.navbar-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  transition: transform var(--transition-normal);
}

.navbar-logo:hover {
  transform: scale(1.05);
}

.navbar-logo img {
  height: 55px;
  width: auto;
}

.logo-text {
  font-size: 26px;
  font-weight: 800;
  color: #FFFFFF;
  /* মূল নাম সাদা */

  letter-spacing: 1px;
  font-family: 'Arial', sans-serif;
}

.highlight {
  color: #00d2ff;
  /* IshQool অংশটি উজ্জ্বল নীল বা সায়ান */
}

.navbar-menu {
  display: flex;
  list-style: none;
  gap: var(--spacing-xl);
  margin: 0;
  padding: 0;
}

.navbar-menu li {
  margin: 0;
}

.navbar-menu a {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: var(--font-size-sm);
  transition: all var(--transition-normal);
  position: relative;
  padding: var(--spacing-xs) 0;
}

.navbar-menu a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width var(--transition-normal);
}

.navbar-menu a:hover {
  color: var(--color-text-primary);
}

.navbar-menu a:hover::after {
  width: 100%;
}

.navbar-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
}

.navbar-toggle span {
  width: 25px;
  height: 3px;
  background: var(--color-text-primary);
  border-radius: 2px;
  transition: all var(--transition-normal);
}

.navbar-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(8px, 8px);
}

.navbar-toggle.active span:nth-child(2) {
  opacity: 0;
}

.navbar-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -7px);
}


.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  background: var(--color-bg-primary);
  padding-top: 70px;
  /* Account for fixed navbar */
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--gradient-hero);
  opacity: 0.1;
  animation: gradientShift 15s ease infinite;
}

@keyframes gradientShift {

  0%,
  100% {
    transform: scale(1) rotate(0deg);
  }

  50% {
    transform: scale(1.2) rotate(5deg);
  }
}

.hero-content {
  text-align: center;
  position: relative;
  z-index: 1;
  padding: var(--spacing-2xl) 0;
}

.hero-title {
  font-size: clamp(2.5rem, 8vw, 4.5rem);
  margin-bottom: var(--spacing-md);
  animation: fadeInUp 0.8s ease;
}

.hero-subtitle {
  font-size: clamp(1.2rem, 3vw, 1.8rem);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-sm);
  animation: fadeInUp 0.8s ease 0.2s backwards;
}

.hero-tagline {
  font-size: var(--font-size-md);
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-xl);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
  animation: fadeInUp 0.8s ease 0.4s backwards;
}

.hero-cta {
  animation: fadeInUp 0.8s ease 0.6s backwards;
}

/* ========================================
   Buttons
   ======================================== */

.btn {
  display: inline-block;
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: var(--font-size-md);
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--border-radius-lg);
  transition: all var(--transition-normal);
  cursor: pointer;
  border: none;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--color-text-primary);
  box-shadow: var(--shadow-md);
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left var(--transition-slow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.btn-primary:hover::before {
  left: 100%;
}

/* ========================================
   Cards
   ======================================== */

.card {
  background: var(--color-bg-card);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform var(--transition-normal);
}

.card:hover {
  transform: translateY(-8px);
  border-color: rgba(255, 255, 255, 0.2);
  box-shadow: var(--shadow-lg);
}

.card:hover::before {
  transform: scaleX(1);
}

.card-icon {
  font-size: var(--font-size-4xl);
  margin-bottom: var(--spacing-md);
  display: inline-block;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.card-title {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-sm);
}

.card-description {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

/* ========================================
   Grid Layouts
   ======================================== */

.grid {
  display: grid;
  gap: var(--spacing-lg);
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* ========================================
   About Section
   ======================================== */

.about {
  background: var(--color-bg-secondary);
}

.about-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.about-highlight {
  font-size: var(--font-size-lg);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-lg);
  line-height: 1.8;
}

/* ========================================
   Programs Section
   ======================================== */

.program-card {
  text-align: center;
  position: relative;
}

.program-card .card-icon {
  font-size: 3.5rem;
  margin-bottom: var(--spacing-md);
}

/* ========================================
   Features Section
   ======================================== */

.features {
  background: var(--color-bg-secondary);
}

.feature-card {
  display: flex;
  gap: var(--spacing-lg);
  align-items: flex-start;
}

.feature-icon {
  font-size: var(--font-size-3xl);
  flex-shrink: 0;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.feature-content h3 {
  margin-bottom: var(--spacing-sm);
}

/* ========================================
   Stats Section
   ======================================== */

.stats {
  background: var(--gradient-primary);
  padding: var(--spacing-2xl) 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-xl);
  text-align: center;
}

.stat-item {
  padding: var(--spacing-lg);
}

.stat-number {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  margin-bottom: var(--spacing-xs);
  display: block;
}

.stat-label {
  font-size: var(--font-size-md);
  opacity: 0.9;
}

/* ========================================
   Courses Section
   ======================================== */

.courses {
  background: var(--color-bg-secondary);
}

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

.course-header {
  text-align: center;
  margin-bottom: var(--spacing-md);
}

.course-content {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.course-description {
  margin-bottom: var(--spacing-lg);
  line-height: 1.8;
}

.course-details {
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--border-radius-md);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.course-detail-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-xs) 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.course-detail-item:last-child {
  border-bottom: none;
}

.detail-label {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

.detail-value {
  color: var(--color-text-primary);
  font-weight: 600;
  font-size: var(--font-size-sm);
}

.btn-course {
  margin-top: auto;
  background: var(--gradient-accent);
  color: var(--color-text-primary);
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: var(--font-size-sm);
  text-align: center;
  box-shadow: var(--shadow-sm);
}

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

/* ========================================
   CTA Section
   ======================================== */

.cta {
  text-align: center;
  padding: var(--spacing-3xl) 0;
}

.cta-content {
  max-width: 700px;
  margin: 0 auto;
}

.cta h2 {
  margin-bottom: var(--spacing-md);
}

.cta p {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-xl);
}

.social-links {
  display: flex;
  justify-content: center;
  gap: var(--spacing-lg);
  margin: var(--spacing-xl) 0;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 60px;
  height: 60px;
  background: var(--color-bg-card);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  color: var(--color-text-primary);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.social-link::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity var(--transition-normal);
  z-index: -1;
}

.social-link:hover {
  transform: translateY(-5px) scale(1.1);
  border-color: rgba(255, 255, 255, 0.3);
  box-shadow: var(--shadow-glow);
}

.social-link:hover::before {
  opacity: 1;
}

.social-link svg {
  position: relative;
  z-index: 1;
}



/* ========================================
   Footer
   ======================================== */

.footer {
  background: var(--color-bg-secondary);
  padding: var(--spacing-xl) 0;
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer p {
  color: var(--color-text-muted);
  margin-bottom: 0;
}

/* ========================================
   Animations
   ======================================== */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-up {
  animation: fadeInUp 0.8s ease;
}

.scroll-reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s ease;
}

.scroll-reveal.active {
  opacity: 1;
  transform: translateY(0);
}

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 768px) {
  :root {
    --spacing-3xl: 4rem;
    --spacing-2xl: 3rem;
  }

  .section {
    padding: var(--spacing-2xl) 0;
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .feature-card {
    flex-direction: column;
    text-align: center;
  }

  .hero-title {
    font-size: 2.5rem;
  }
}

/* ========================================
   Accordion Styles
   ======================================== */
.accordion {
  margin-top: var(--spacing-xl);
  max-width: 800px;
  width: 100%;
}

.accordion-item {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-md);
  margin-bottom: var(--spacing-sm);
  overflow: hidden;
  transition: all var(--transition-normal);
}

.accordion-item:hover {
  border-color: rgba(255, 255, 255, 0.2);
}

.accordion-header {
  padding: var(--spacing-md);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: transparent;
  width: 100%;
  border: none;
  font-size: var(--font-size-md);
  font-weight: 600;
  color: var(--color-text-primary);
  text-align: left;
}

.accordion-header::after {
  content: '+';
  font-family: var(--font-primary);
  font-weight: 400;
  font-size: 1.5rem;
  transition: transform var(--transition-normal);
  color: var(--color-primary);
}

.accordion-item.active .accordion-header::after {
  transform: rotate(45deg);
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out;
  background: rgba(0, 0, 0, 0.2);
}

.accordion-body {
  padding: var(--spacing-md);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ========================================
   Countdown Timer Styles
   ======================================== */
.countdown-timer {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  margin-bottom: var(--spacing-xl);
  flex-wrap: wrap;
}

.timer-box {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-md);
  padding: var(--spacing-sm);
  min-width: 80px;
  display: flex;
  flex-direction: column;
  align-items: center;
  backdrop-filter: blur(5px);
}

.timer-number {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1.2;
}

.timer-label {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* Updated Responsive styles for timer */
@media (max-width: 480px) {
  .countdown-timer {
    gap: var(--spacing-xs);
  }

  .timer-box {
    min-width: 60px;
    padding: var(--spacing-xs);
  }

  .timer-number {
    font-size: 1.4rem;
  }

  .timer-label {
    font-size: 0.7rem;
  }
}

/* Resume Mobile Styles */
@media (max-width: 768px) {
  .hero-subtitle {
    font-size: 1.3rem;
  }

  /* Mobile Navbar */
  .navbar-toggle {
    display: flex;
  }

  .navbar-menu {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: rgba(10, 14, 39, 0.98);
    backdrop-filter: blur(10px);
    flex-direction: column;
    gap: 0;
    padding: var(--spacing-lg) 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
  }

  .navbar-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .navbar-menu li {
    text-align: center;
    padding: var(--spacing-sm) 0;
  }

  .navbar-menu a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-md);
  }

  .navbar-menu a::after {
    display: none;
  }

  .social-links {
    flex-wrap: wrap;
    gap: var(--spacing-md);
  }

  .social-link {
    width: 50px;
    height: 50px;
  }

  .social-link svg {
    width: 24px;
    height: 24px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-sm);
  }

  .card {
    padding: var(--spacing-lg);
  }

  .btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-sm);
  }
}

/* ========================================
   Utility Classes
   ======================================== */

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

.mb-sm {
  margin-bottom: var(--spacing-sm);
}

.mb-md {
  margin-bottom: var(--spacing-md);
}

.mb-lg {
  margin-bottom: var(--spacing-lg);
}

.mb-xl {
  margin-bottom: var(--spacing-xl);
}

.mt-sm {
  margin-top: var(--spacing-sm);
}

.mt-md {
  margin-top: var(--spacing-md);
}

.mt-lg {
  margin-top: var(--spacing-lg);
}


.mt-xl {
  margin-top: var(--spacing-xl);
}

.mb-sm {
  margin-bottom: var(--spacing-sm);
}

.mb-md {
  margin-bottom: var(--spacing-md);
}

.mb-lg {
  margin-bottom: var(--spacing-lg);
}

.mb-xl {
  margin-bottom: var(--spacing-xl);
}

/* ========================================
   Accordion Styles (Legacy - Kept if needed elsewhere, otherwise safe to ignore)
   ======================================== */


/* ========================================
   Accordion Styles
   ======================================== */
.accordion {
  max-width: 800px;
  margin: 0 auto;
}

.accordion-item {
  background: var(--color-bg-card);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-sm);
  margin-bottom: var(--spacing-sm);
  overflow: hidden;
  transition: all var(--transition-normal);
}

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

.accordion-header {
  width: 100%;
  padding: var(--spacing-md);
  background: transparent;
  border: none;
  color: var(--color-text-primary);
  text-align: left;
  font-size: var(--font-size-md);
  font-weight: 500;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background var(--transition-fast);
}

.accordion-header:hover {
  background: rgba(255, 255, 255, 0.05);
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out;
  background: rgba(0, 0, 0, 0.2);
}

.accordion-content p {
  padding: var(--spacing-md);
  margin-bottom: 0;
  color: var(--color-text-secondary);
}

.accordion-header .icon {
  font-size: 1.5rem;
  color: var(--color-accent);
}