/* ==========================================================================
   VETHA YOGALAYA - PRODUCTION DESIGN SYSTEM & STYLESHEET
   Apple-Material Inspired, Peaceful Luxury, Dark Mode, Accessible WCAG AA
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. CSS VARIABLES & THEME TOKENS
   -------------------------------------------------------------------------- */
:root {
  /* Color Palette - Light Theme */
  --primary-rgb: 46, 139, 87;
  --primary: #2E8B57;
  --primary-hover: #267347;
  --primary-light: #E8F5E9;
  --primary-dark: #1E5C39;
  
  --secondary-rgb: 244, 231, 211;
  --secondary: #F4E7D3;
  --secondary-hover: #EAD8BF;
  --secondary-light: #FAF4EB;

  --accent-rgb: 230, 126, 34;
  --accent: #E67E22;
  --accent-hover: #D35400;
  --accent-light: #FDF2E9;

  --bg: #FAFAFA;
  --bg-surface: #FFFFFF;
  --bg-surface-elevated: #FFFFFF;
  --bg-alt: #F3F4F6;
  --border-color: #E5E7EB;

  --text-main: #222222;
  --text-muted: #555555;
  --text-light: #777777;
  --text-white: #FFFFFF;

  /* Typography */
  --font-heading: 'Lora', serif;
  --font-body: 'Inter', sans-serif;
  --font-btn: 'Poppins', sans-serif;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 16px 36px rgba(0, 0, 0, 0.1);
  --shadow-glass: 0 8px 32px 0 rgba(46, 139, 87, 0.08);

  /* Border Radii */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.5s cubic-bezier(0.16, 1, 0.3, 1);

  /* Layout */
  --container-max: 1280px;
  --header-height: 80px;
}

/* Dark Mode Tokens */
[data-theme="dark"] {
  --bg: #0D1310;
  --bg-surface: #151D18;
  --bg-surface-elevated: #1C2721;
  --bg-alt: #18221C;
  --border-color: #28382E;

  --text-main: #F3F4F6;
  --text-muted: #9CA3AF;
  --text-light: #6B7280;

  --primary-light: rgba(46, 139, 87, 0.15);
  --secondary: #2C261E;
  --secondary-light: #221D16;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 16px 36px rgba(0, 0, 0, 0.6);
  --shadow-glass: 0 8px 32px 0 rgba(0, 0, 0, 0.4);
}

/* --------------------------------------------------------------------------
   2. RESET & BASE STYLES
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-body);
  background-color: var(--bg);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.25;
  color: var(--text-main);
  margin-bottom: 1rem;
}

h1 { font-size: clamp(2.25rem, 5vw, 3.75rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.75rem, 3.5vw, 2.75rem); letter-spacing: -0.01em; }
h3 { font-size: clamp(1.35rem, 2.5vw, 1.85rem); }
h4 { font-size: 1.25rem; }

p {
  margin-bottom: 1.25rem;
  color: var(--text-muted);
}

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

a:hover {
  color: var(--primary-hover);
}

img, video {
  max-width: 100%;
  height: auto;
  display: block;
}

button, input, select, textarea {
  font-family: inherit;
  font-size: 1rem;
}

/* --------------------------------------------------------------------------
   3. LAYOUT & CONTAINERS
   -------------------------------------------------------------------------- */
.container {
  width: 90%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1rem;
}

.section {
  padding: 5rem 0;
  position: relative;
}

.section-alt {
  background-color: var(--bg-alt);
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 3.5rem auto;
}

.badge {
  display: inline-block;
  padding: 0.35rem 1rem;
  background-color: var(--primary-light);
  color: var(--primary);
  font-family: var(--font-btn);
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border-radius: var(--radius-full);
  margin-bottom: 0.75rem;
}

.section-title {
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
}

.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 2.5rem; }
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2rem; }
.grid-4 { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.5rem; }

/* --------------------------------------------------------------------------
   4. NAVIGATION & HEADER
   -------------------------------------------------------------------------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background-color: rgba(250, 250, 250, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  z-index: 1000;
  border-bottom: 1px solid var(--border-color);
  transition: background-color var(--transition-normal), box-shadow var(--transition-normal);
}

[data-theme="dark"] .header {
  background-color: rgba(13, 19, 16, 0.85);
}

.header.scrolled {
  box-shadow: var(--shadow-md);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-main);
}

.logo img {
  height: 42px;
  width: auto;
}

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

.nav-menu {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
}

.nav-link {
  font-family: var(--font-btn);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-main);
  position: relative;
  padding: 0.5rem 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background-color: var(--primary);
  transition: width var(--transition-fast);
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  color: var(--text-main);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition-fast);
}

.theme-toggle:hover {
  background-color: var(--bg-alt);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  color: var(--text-main);
}

/* Drawer Mobile Menu */
.mobile-drawer {
  position: fixed;
  top: 0;
  right: -100%;
  width: 300px;
  height: 100vh;
  background-color: var(--bg-surface);
  box-shadow: var(--shadow-lg);
  z-index: 1050;
  transition: right var(--transition-normal);
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
}

.mobile-drawer.open {
  right: 0;
}

.drawer-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 1040;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal);
}

.drawer-overlay.open {
  opacity: 1;
  visibility: visible;
}

.drawer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.drawer-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-main);
}

.drawer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

/* --------------------------------------------------------------------------
   5. BUTTONS & INTERACTIVE COMPONENTS
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.75rem;
  font-family: var(--font-btn);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  text-align: center;
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--primary);
  color: var(--text-white);
  box-shadow: 0 4px 14px rgba(46, 139, 87, 0.35);
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  color: var(--text-white);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(46, 139, 87, 0.45);
}

.btn-secondary {
  background-color: var(--secondary);
  color: #3D2B1F;
}

.btn-secondary:hover {
  background-color: var(--secondary-hover);
  transform: translateY(-2px);
}

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

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

.btn-accent {
  background-color: var(--accent);
  color: var(--text-white);
}

.btn-accent:hover {
  background-color: var(--accent-hover);
  color: var(--text-white);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 0.5rem 1.25rem;
  font-size: 0.85rem;
}

.btn-lg {
  padding: 1.1rem 2.25rem;
  font-size: 1.05rem;
}

/* --------------------------------------------------------------------------
   6. CARDS & CONTAINERS
   -------------------------------------------------------------------------- */
.card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 2rem;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  position: relative;
  overflow: hidden;
}

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

.card-glass {
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

[data-theme="dark"] .card-glass {
  background: rgba(21, 29, 24, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.card-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background-color: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  font-size: 1.5rem;
}

/* Program Card */
.program-card {
  padding: 0;
  display: flex;
  flex-direction: column;
}

.program-card-img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.program-card-body {
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.program-meta {
  display: flex;
  gap: 1rem;
  font-size: 0.85rem;
  color: var(--text-light);
  margin-bottom: 0.75rem;
}

/* --------------------------------------------------------------------------
   7. HERO SECTION
   -------------------------------------------------------------------------- */
.hero {
  padding-top: calc(var(--header-height) + 4rem);
  padding-bottom: 5rem;
  background: linear-gradient(135deg, rgba(46, 139, 87, 0.05) 0%, rgba(244, 231, 211, 0.3) 100%);
  position: relative;
  overflow: hidden;
}

[data-theme="dark"] .hero {
  background: linear-gradient(135deg, rgba(13, 19, 16, 1) 0%, rgba(28, 39, 33, 1) 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3.5rem;
  align-items: center;
}

.hero-content h1 {
  margin-bottom: 1.25rem;
}

.hero-content p {
  font-size: 1.2rem;
  margin-bottom: 2rem;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero-media {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.hero-media img {
  width: 100%;
  height: 480px;
  object-fit: cover;
}

/* Stats counter strip */
.stats-strip {
  background-color: var(--bg-surface);
  border-radius: var(--radius-md);
  padding: 2.5rem 2rem;
  box-shadow: var(--shadow-md);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 2rem;
  text-align: center;
  margin-top: -3rem;
  position: relative;
  z-index: 10;
  border: 1px solid var(--border-color);
}

.stat-number {
  font-family: var(--font-heading);
  font-size: 2.75rem;
  font-weight: 700;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: 0.95rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* --------------------------------------------------------------------------
   8. ACCORDION & FAQ
   -------------------------------------------------------------------------- */
.accordion {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 800px;
  margin: 0 auto;
}

.accordion-item {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.accordion-header {
  width: 100%;
  padding: 1.35rem 1.5rem;
  text-align: left;
  background: none;
  border: none;
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-main);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  transition: color var(--transition-fast);
}

.accordion-header:hover {
  color: var(--primary);
}

.accordion-icon {
  transition: transform var(--transition-normal);
}

.accordion-item.active .accordion-icon {
  transform: rotate(180deg);
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal), padding var(--transition-normal);
  padding: 0 1.5rem;
}

.accordion-item.active .accordion-content {
  padding: 0 1.5rem 1.5rem 1.5rem;
  max-height: 500px;
}

/* --------------------------------------------------------------------------
   9. TIMETABLE TABLE
   -------------------------------------------------------------------------- */
.timetable-filter {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.filter-btn {
  padding: 0.6rem 1.25rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-color);
  background-color: var(--bg-surface);
  color: var(--text-main);
  font-family: var(--font-btn);
  font-size: 0.9rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-btn.active, .filter-btn:hover {
  background-color: var(--primary);
  color: var(--text-white);
  border-color: var(--primary);
}

.timetable-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.schedule-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  border-left: 4px solid var(--primary);
}

.schedule-time {
  font-family: var(--font-btn);
  font-size: 0.85rem;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.schedule-title {
  font-size: 1.15rem;
  margin-bottom: 0.35rem;
}

/* --------------------------------------------------------------------------
   10. PRICING CARDS
   -------------------------------------------------------------------------- */
.pricing-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
}

.pricing-card.popular {
  border: 2px solid var(--primary);
  box-shadow: var(--shadow-lg);
}

.pricing-badge {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  background-color: var(--primary);
  color: var(--text-white);
  font-size: 0.75rem;
  font-family: var(--font-btn);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.price-amount {
  font-family: var(--font-heading);
  font-size: 2.75rem;
  font-weight: 700;
  color: var(--text-main);
  margin: 1rem 0;
}

.price-amount span {
  font-size: 1rem;
  font-family: var(--font-body);
  color: var(--text-muted);
  font-weight: 400;
}

.pricing-features {
  list-style: none;
  margin: 1.5rem 0 2rem 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.95rem;
  color: var(--text-muted);
}

.pricing-features li::before {
  content: '✓';
  color: var(--primary);
  font-weight: bold;
}

/* --------------------------------------------------------------------------
   11. FORMS & INPUTS
   -------------------------------------------------------------------------- */
.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  font-family: var(--font-btn);
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: var(--text-main);
}

.form-control {
  width: 100%;
  padding: 0.85rem 1.1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background-color: var(--bg-surface);
  color: var(--text-main);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(46, 139, 87, 0.2);
}

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

/* --------------------------------------------------------------------------
   12. FLOATING WIDGETS & MODAL
   -------------------------------------------------------------------------- */
.floating-widgets {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  z-index: 990;
}

.floating-btn {
  width: 54px;
  height: 54px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-white);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-fast);
}

.floating-btn:hover {
  transform: scale(1.1);
  color: var(--text-white);
}

.btn-whatsapp { background-color: #25D366; }
.btn-call { background-color: var(--primary); }
.btn-back-to-top {
  background-color: var(--bg-surface);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.btn-back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 2rem;
  left: 2rem;
  z-index: 1100;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.toast {
  background-color: var(--bg-surface);
  color: var(--text-main);
  border-left: 4px solid var(--primary);
  padding: 1rem 1.5rem;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  animation: slideIn 0.3s ease forwards;
}

@keyframes slideIn {
  from { transform: translateX(-100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* Cookie Consent */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-color);
  padding: 1.25rem 2rem;
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  transform: translateY(100%);
  transition: transform var(--transition-normal);
}

.cookie-banner.visible {
  transform: translateY(0);
}

/* --------------------------------------------------------------------------
   13. FOOTER
   -------------------------------------------------------------------------- */
.footer {
  background-color: #121815;
  color: #E5E7EB;
  padding: 4.5rem 0 2rem 0;
  border-top: 1px solid #1C2721;
}

.footer h4 {
  color: #FFFFFF;
  font-size: 1.15rem;
  margin-bottom: 1.5rem;
}

.footer p, .footer li, .footer a {
  color: #9CA3AF;
  font-size: 0.95rem;
}

.footer a:hover {
  color: var(--secondary);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 3rem;
  margin-bottom: 3.5rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid #1F2923;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.85rem;
}

.social-links {
  display: flex;
  gap: 1rem;
}

.social-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background-color: rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFFFFF;
  transition: background-color var(--transition-fast);
}

.social-icon:hover {
  background-color: var(--primary);
  color: #FFFFFF;
}

/* --------------------------------------------------------------------------
   14. RESPONSIVE BREAKPOINTS
   -------------------------------------------------------------------------- */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero-cta {
    justify-content: center;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-menu { display: none; }
  .mobile-menu-btn { display: block; }
  .footer-grid { grid-template-columns: 1fr; }
  .cookie-banner { flex-direction: column; text-align: center; }
  .stats-strip { grid-template-columns: 1fr 1fr; }
}