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

/* ===== CSS RESET & ROOT ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #3b82f6;
  --primary-50: #eff6ff;
  --primary-100: #dbeafe;
  --primary-200: #bfdbfe;
  --secondary: #64748b;
  --success: #10b981;
  --success-light: #d1fae5;
  --warning: #f59e0b;
  --danger: #ef4444;
  --danger-light: #fee2e2;
  --dark: #0f172a;
  --dark-700: #334155;
  --dark-600: #475569;
  --dark-500: #64748b;
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --white: #ffffff;
  --bg: #f0f5ff;
  --card-bg: #ffffff;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  --font: 'Inter', 'Noto Sans Bengali', sans-serif;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.dark-mode {
  --primary-50: #0f172a;
  --primary-100: #1e293b;
  --primary-200: #334155;
  --bg: #0b0f19;
  --card-bg: #1e293b;
  --dark: #f1f5f9;
  --dark-700: #cbd5e1;
  --dark-600: #94a3b8;
  --dark-500: #64748b;
  --gray-50: #1e293b;
  --gray-100: #334155;
  --gray-200: #475569;
  --gray-300: #64748b;
  --gray-400: #94a3b8;
  --white: #1e293b;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow: 0 1px 3px rgba(0,0,0,0.4), 0 1px 2px rgba(0,0,0,0.2);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.4), 0 2px 4px -1px rgba(0,0,0,0.2);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.4), 0 4px 6px -2px rgba(0,0,0,0.2);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.4), 0 10px 10px -5px rgba(0,0,0,0.2);
}

html { scroll-behavior: smooth; overflow-x: hidden; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--dark);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
button { cursor: pointer; font-family: var(--font); border: none; }
input, select, textarea { font-family: var(--font); }

/* ===== UTILITIES ===== */
.container { max-width: 1280px; margin: 0 auto; padding: 0 20px; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.grid { display: grid; }
.text-center { text-align: center; }
.text-primary { color: var(--primary); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-muted { color: var(--dark-500); }
.fw-500 { font-weight: 500; }
.fw-600 { font-weight: 600; }
.fw-700 { font-weight: 700; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.gap-1 { gap: 8px; }
.gap-2 { gap: 16px; }
.gap-3 { gap: 24px; }

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.85rem;
  transition: var(--transition);
  border: 2px solid transparent;
 
}
.btn .material-icons { font-size: 20px; }
.btn-primary {
  background: var(--primary);
  color: var(--white);
}
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(37,99,235,0.4);
}
.btn-outline {
  background: transparent;
  color: var(--primary);
  border-color: var(--primary);
}
.btn-outline:hover {
  background: var(--primary);
  color: var(--white);
  transform: translateY(-2px);
}
.btn-success {
  background: var(--success);
  color: var(--white);
}
.btn-success:hover {
  background: #059669;
  transform: translateY(-2px);
}
.btn-white {
  background: var(--white);
  color: var(--primary);
  border-color: var(--gray-200);
}
.btn-white:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
}
.btn-sm { padding: 8px 16px; font-size: 0.875rem; }
.btn-lg { padding: 14px 32px; font-size: 1rem; }
.btn-block { width: 100%; justify-content: center; }

/* ===== NAVBAR ===== */
.navbar {
  background: var(--white);
  border-bottom: 1px solid var(--gray-200);
  position: sticky;
  top: 0;
  z-index: 1000;
  padding: 0 0;
}
.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}
.navbar-logo {
  width: 42px;
  height: 42px;
  background: var(--primary);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 24px;
  font-weight: 800;
  position: relative;
}
.navbar-logo .material-icons { font-size: 24px; }
.navbar-brand-text h1 {
  font-size: 1.375rem;
  font-weight: 800;
  color: var(--dark);
  line-height: 1.2;
}
.navbar-brand-text span {
  font-size: 0.75rem;
  color: var(--primary);
  font-weight: 500;
}
.navbar-nav {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-left: 32px;
}
.navbar-nav a {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--dark);
  letter-spacing: 0.3px;
  transition: var(--transition);
  position: relative;
  padding: 4px 0;
}
.navbar-nav a:hover,
.navbar-nav a.active {
  color: var(--primary);
}
.navbar-nav a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
}
.navbar-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
.lang-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: var(--radius-full);
  border: 1px solid var(--gray-200);
  background: var(--white);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--dark-600);
  cursor: pointer;
  transition: var(--transition);
}
.lang-toggle:hover { border-color: var(--primary); color: var(--primary); }
.lang-toggle .material-icons { font-size: 18px; }
.btn-get-started {
  background: var(--primary);
  color: var(--white);
  padding: 10px 20px;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition);
}
.btn-get-started:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(37,99,235,0.3);
}
.btn-get-started .material-icons { font-size: 18px; }
.mobile-controls {
  display: none;
  align-items: center;
  gap: 8px;
}
.theme-toggle-mobile {
  background: none;
  border: none;
  color: var(--dark);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}
.theme-toggle-mobile .material-icons {
  font-size: 24px;
}
.mobile-toggle {
  background: none;
  border: none;
  font-size: 28px;
  color: var(--dark);
  cursor: pointer;
}

/* ===== HERO SECTION ===== */
.hero {
  background: linear-gradient(135deg, var(--primary-50) 0%, var(--white) 50%, var(--primary-50) 100%);
  padding: 80px 0;
  position: relative;
  overflow: hidden;
}
.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.hero-text h2 {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.15;
  color: var(--dark);
  margin-bottom: 8px;
}
.hero-text h2 .highlight {
  color: var(--primary);
  display: block;
}
.hero-text p {
  font-size: 1.0625rem;
  color: var(--dark-500);
  margin: 16px 0 24px;
  line-height: 1.7;
  max-width: 520px;
}
.hero-badges {
  display: flex;
  gap: 24px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}
.hero-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--dark-600);
}
.hero-badge-icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--primary-100);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
}
.hero-badge-icon .material-icons { font-size: 18px; }
.hero-buttons { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.hero-illustration {
  width: 100%;
  max-width: 520px;
  position: relative;
}
.hero-main-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  padding: 24px;
  position: relative;
}
.hero-fb-header {
  background: linear-gradient(135deg, #1877f2 0%, #42a5f5 100%);
  border-radius: var(--radius) var(--radius) 0 0;
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  color: white;
}
.hero-fb-header .fb-icon {
  font-size: 36px;
  font-weight: 800;
  font-family: 'Helvetica Neue', Arial, sans-serif;
}
.hero-fb-body { padding: 16px 0; }
.hero-fb-stats {
  display: flex;
  gap: 16px;
  margin-top: 12px;
}
.hero-fb-stat {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.8125rem;
  color: var(--dark-500);
}
.hero-float-badge {
  position: absolute;
  padding: 10px 16px;
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8125rem;
  font-weight: 600;
  animation: float 3s ease-in-out infinite;
}
.hero-float-badge.top-right { top: -10px; right: -10px; }
.hero-float-badge.bottom-left { bottom: 30px; left: -20px; }
.hero-float-badge.bottom-right { bottom: -10px; right: 20px; }
.hero-float-badge .material-icons { font-size: 20px; }
.badge-check { color: var(--success); }
.badge-dollar { color: var(--primary); }

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* ===== SERVICES SECTION ===== */
.services {
  padding: 80px 0;
  background: var(--white);
}
.section-label {
  text-transform: uppercase;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 2px;
  margin-bottom: 8px;
}
.section-title {
  font-size: 2rem;
  font-weight: 800;
  color: var(--dark);
  margin-bottom: 48px;
}
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.service-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: var(--transition);
}
.service-card:hover {
  border-color: var(--primary-200);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}
.service-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--primary-100);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  margin-bottom: 20px;
}
.service-icon .material-icons { font-size: 28px; }
.service-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--dark);
}
.service-card p {
  font-size: 0.85rem;
  color: var(--dark-500);
  line-height: 1.6;
  margin-bottom: 20px;
}
.service-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary);
  font-weight: 600;
  font-size: 0.85rem;
  padding: 8px 16px;
  border: 1px solid var(--primary-200);
  border-radius: var(--radius);
  transition: var(--transition);
}
.service-link:hover {
  background: var(--primary);
  color: var(--white);
  border-color: var(--primary);
}
.service-link .material-icons { font-size: 18px; transition: var(--transition); }
.service-link:hover .material-icons { transform: translateX(4px); }

/* ===== TRUST BAR ===== */
.trust-bar {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  padding: 40px 0;
  color: var(--white);
}
.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.trust-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}
.trust-icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(255,255,255,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.trust-icon .material-icons { font-size: 24px; }
.trust-item h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 4px;
}
.trust-item p {
  font-size: 0.8125rem;
  opacity: 0.85;
  line-height: 1.5;
}

/* ===== FOOTER ===== */
.footer {
  background: var(--dark);
  color: var(--gray-300);
  padding: 60px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-brand h3 {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--white);
  margin-bottom: 16px;
}
.footer-brand p {
  font-size: 0.85rem;
  line-height: 1.7;
  margin-bottom: 20px;
}
.footer-social {
  display: flex;
  gap: 12px;
}
.footer-social a {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gray-300);
  transition: var(--transition);
}
.footer-social a:hover {
  background: var(--primary);
  color: var(--white);
  transform: translateY(-2px);
}
.footer-col h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 20px;
}
.footer-col li { margin-bottom: 10px; }
.footer-col a {
  font-size: 0.85rem;
  color: var(--gray-400);
  transition: var(--transition);
}
.footer-col a:hover { color: var(--primary-light); }
.footer-bottom {
  padding: 20px 0;
  text-align: center;
  font-size: 0.875rem;
  color: var(--gray-400);
}

/* ===== BREADCRUMB ===== */
.breadcrumb {
  padding: 12px 0;
  font-size: 0.875rem;
  color: var(--dark-500);
}
.breadcrumb a { color: var(--dark-500); transition: var(--transition); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb span { margin: 0 8px; }

/* ===== SCROLL REVEAL ===== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== TOAST / ALERT ===== */
.toast {
  position: fixed;
  top: 80px;
  right: 20px;
  padding: 16px 24px;
  border-radius: var(--radius);
  color: var(--white);
  font-weight: 500;
  z-index: 10000;
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: var(--shadow-xl);
  transform: translateX(120%);
  transition: var(--transition);
}
.toast.show { transform: translateX(0); }
.toast.success { background: var(--success); }
.toast.error { background: var(--danger); }
.toast.info { background: var(--primary); }

/* ===== MODAL ===== */
.modal-overlay {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(4px);
  z-index: 9999;
  display: none;
  align-items: center;
  justify-content: center;
}
.modal-overlay.active { display: flex; }
.modal {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 32px;
  max-width: 500px;
  width: 90%;
  box-shadow: var(--shadow-xl);
  max-height: 90vh;
  overflow-y: auto;
}
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}
.modal-header h3 { font-size: 1.25rem; font-weight: 700; }
.modal-close {
  width: 32px; height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gray-100);
  color: var(--dark-500);
  cursor: pointer;
  transition: var(--transition);
}
.modal-close:hover { background: var(--danger-light); color: var(--danger); }

/* ===== FORM ELEMENTS ===== */
.form-group { margin-bottom: 20px; }
.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--dark);
  margin-bottom: 6px;
}
.form-label .required { color: var(--danger); }
.form-help {
  font-size: 0.8125rem;
  color: var(--dark-500);
  margin-bottom: 8px;
}
.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  font-size: 0.85rem;
  color: var(--dark);
  background: var(--white);
  transition: var(--transition);
}
.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}
.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--gray-400);
}
.form-textarea { resize: vertical; min-height: 120px; }
.form-input-icon {
  position: relative;
}
.form-input-icon .material-icons {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--gray-400);
  font-size: 20px;
}
.form-input-icon .form-input {
  padding-left: 44px;
}

/* ===== TOGGLE SWITCH ===== */
.toggle-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
}
.toggle {
  width: 52px;
  height: 28px;
  border-radius: 14px;
  background: var(--gray-300);
  position: relative;
  cursor: pointer;
  transition: var(--transition);
}
.toggle.active { background: var(--success); }
.toggle::after {
  content: '';
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--white);
  position: absolute;
  top: 3px;
  left: 3px;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}
.toggle.active::after { left: 27px; }
.toggle-label { font-size: 0.875rem; color: var(--dark-500); font-weight: 500; }

/* ===== BADGE ===== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
}
.badge-primary { background: var(--primary-100); color: var(--primary); }
.badge-success { background: var(--success-light); color: var(--success); }
.badge-warning { background: #fef3c7; color: #d97706; }
.badge-danger { background: var(--danger-light); color: var(--danger); }
.badge-verified {
  background: var(--success-light);
  color: var(--success);
  padding: 4px 12px;
}
.badge-verified .material-icons { font-size: 14px; }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .hero-content { grid-template-columns: 1fr; text-align: center; }
  .hero-text p { max-width: 100%; }
  .hero-badges { justify-content: center; }
  .hero-buttons { justify-content: center; }
  .hero-visual { display: none; }
  .services-grid { grid-template-columns: 1fr; }
  .trust-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .navbar-nav { display: none; }
  .mobile-controls { display: flex; }
  
  .navbar-actions {
    display: none;
  }
  .navbar-actions .theme-toggle {
    display: none !important;
  }
  .navbar-actions.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--white);
    padding: 20px;
    border-bottom: 1px solid var(--gray-200);
    box-shadow: var(--shadow-lg);
    gap: 16px;
    align-items: stretch;
  }
  .navbar-actions.active .btn-get-started { justify-content: center; }
  
  .navbar-brand-text h1 { font-size: 1.125rem; }
  .navbar-brand-text span { display: none; }
  
  .navbar-nav.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--white);
    padding: 20px;
    border-bottom: 1px solid var(--gray-200);
    box-shadow: var(--shadow-lg);
    gap: 16px;
  }
  .hero { padding: 40px 0; }
  .hero-text h2 { font-size: 2rem; }
  .section-title { font-size: 1.5rem; }
  .trust-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .btn-get-started span { display: inline-flex; }
}