/* ==========================================================================
   «УЧИТЬ ЛЕГКО» — Студия быстрых курсов для детей
   Премиальный стиль: Холодный бирюзовый / Ледяной лазурный / Глубокий океанический
   Pure CSS without external frameworks
   ========================================================================== */

:root {
  /* Color Palette - Cool Turquoise / Ice Cyan Luxury Theme */
  --color-bg-main: #F0F6F8;         /* Cool icy-cyan substrate */
  --color-bg-secondary: #E3EFF2;    /* Soft frost teal-sky background */
  --color-bg-card: #FFFFFF;         /* Crisp pure white card surface */
  --color-bg-card-subtle: #ECF5F7;  /* Light cool frosty card */
  --color-bg-dark: #0E1E24;         /* Deep luxury oceanic graphite / navy-teal */
  --color-bg-dark-card: #152A32;    /* Rich dark teal charcoal */
  
  --color-text-primary: #0D2027;    /* Deep dark oceanic text */
  --color-text-secondary: #3D5560;  /* Cool slate muted text */
  --color-text-tertiary: #6E8996;   /* Cool light slate label text */
  --color-text-inverse: #F0F8FA;    /* Ice white for dark bg */
  --color-text-inverse-sub: #B0CAD6;

  --color-accent-gold: #008E9B;     /* Vibrant luxury turquoise teal */
  --color-accent-gold-hover: #00727D;
  --color-accent-gold-light: #DEF2F5;/* Frosted cyan tint */
  --color-accent-terracotta: #E06D53;
  --color-accent-sage: #00A896;     /* Minty aqua */
  --color-accent-sage-light: #E0F7F4;
  --color-accent-sky: #0284C7;     /* Sky azure */
  --color-accent-sky-light: #E0F2FE;

  --color-border: #CFE3E8;
  --color-border-light: #E1EFF3;
  --color-border-dark: #223F4B;

  /* Typography */
  --font-serif: 'Playfair Display', 'Cormorant Garamond', Georgia, serif;
  --font-sans: 'Plus Jakarta Sans', 'Onest', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Shadows & Elevations */
  --shadow-sm: 0 2px 8px rgba(13, 32, 39, 0.04);
  --shadow-md: 0 8px 24px rgba(13, 32, 39, 0.08);
  --shadow-lg: 0 16px 40px rgba(13, 32, 39, 0.12);
  --shadow-xl: 0 24px 60px rgba(13, 32, 39, 0.16);
  --shadow-gold: 0 10px 30px rgba(0, 142, 155, 0.28);
  --shadow-inner: inset 0 2px 4px rgba(0, 0, 0, 0.04);

  /* Radii */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-xl: 32px;
  --radius-full: 9999px;

  /* Transitions */
  --trans-fast: 0.2s cubic-bezier(0.2, 0.8, 0.2, 1);
  --trans-normal: 0.35s cubic-bezier(0.2, 0.8, 0.2, 1);
  --trans-slow: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  --trans-bounce: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Layout */
  --max-width: 1240px;
  --nav-height: 80px;
}

/* ==========================================================================
   RESET & BASE STYLES
   ========================================================================== */

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

/* Subtle clean turquoise dot grid */
body::before {
  content: "";
  position: fixed;
  top: 0; left: 0; width: 100%; height: 100%;
  pointer-events: none;
  opacity: 0.035;
  z-index: 999;
  background-image: radial-gradient(var(--color-accent-gold) 1px, transparent 1px);
  background-size: 24px 24px;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

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

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
  background: none;
}

button {
  cursor: pointer;
  user-select: none;
}

ul, ol {
  list-style: none;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* Section Common */
.section {
  padding: 96px 0;
  position: relative;
}

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

.section-bg-dark {
  background-color: var(--color-bg-dark);
  color: var(--color-text-inverse);
}

/* Section Header */
.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px auto;
}

.section-header.text-left {
  text-align: left;
  margin-left: 0;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background-color: var(--color-accent-gold-light);
  color: var(--color-accent-gold-hover);
  border: 1px solid rgba(0, 142, 155, 0.35);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}

.section-tag.tag-sage {
  background-color: var(--color-accent-sage-light);
  color: var(--color-accent-sage);
  border-color: rgba(0, 168, 150, 0.35);
}

.section-tag.tag-dark {
  background-color: rgba(255, 255, 255, 0.08);
  color: #38BDF8;
  border-color: rgba(56, 189, 248, 0.4);
}

.section-title {
  font-family: var(--font-serif);
  font-size: 2.75rem;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
  margin-bottom: 18px;
}

.section-bg-dark .section-title {
  color: var(--color-text-inverse);
}

.section-title span.highlight {
  color: var(--color-accent-gold);
  font-style: italic;
  position: relative;
  display: inline-block;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.section-bg-dark .section-subtitle {
  color: var(--color-text-inverse-sub);
}

/* ==========================================================================
   BUTTONS & CONTROLS (LUXURY HOVER & 3D FEEL)
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px 32px;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  transition: all var(--trans-normal);
  position: relative;
  overflow: hidden;
  z-index: 1;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  background: linear-gradient(120deg, rgba(255,255,255,0) 20%, rgba(255,255,255,0.25) 50%, rgba(255,255,255,0) 80%);
  transform: translateX(-100%);
  transition: transform 0.65s ease;
  z-index: -1;
}

.btn:hover::before {
  transform: translateX(100%);
}

.btn-gold {
  background: linear-gradient(135deg, #00A896 0%, #008E9B 50%, #00727D 100%);
  color: #FFFFFF;
  box-shadow: var(--shadow-gold);
  border: 1px solid rgba(255, 255, 255, 0.25);
}

.btn-gold:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 14px 32px rgba(0, 142, 155, 0.4);
}

.btn-gold:active {
  transform: translateY(0) scale(0.99);
}

.btn-dark {
  background-color: var(--color-bg-dark);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-md);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-dark:hover {
  background-color: #19333D;
  transform: translateY(-3px) scale(1.02);
  box-shadow: var(--shadow-lg);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-text-primary);
  border: 1.5px solid var(--color-border);
}

.btn-outline:hover {
  border-color: var(--color-accent-gold);
  color: var(--color-accent-gold-hover);
  background-color: var(--color-accent-gold-light);
  transform: translateY(-2px);
}

.btn-outline-white {
  background-color: rgba(255, 255, 255, 0.05);
  color: var(--color-text-inverse);
  border: 1.5px solid rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(8px);
}

.btn-outline-white:hover {
  background-color: rgba(255, 255, 255, 0.15);
  border-color: #38BDF8;
  color: #38BDF8;
  transform: translateY(-2px);
}

.btn-sm {
  padding: 10px 20px;
  font-size: 0.85rem;
}

.btn-icon-circle {
  width: 44px;
  height: 44px;
  padding: 0;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* ==========================================================================
   NOTIFICATION BAR (VIP EARLY BIRD)
   ========================================================================== */

.top-bar {
  background: linear-gradient(90deg, #09171C 0%, #13272F 50%, #09171C 100%);
  color: var(--color-text-inverse);
  padding: 10px 0;
  font-size: 0.875rem;
  border-bottom: 1px solid rgba(0, 142, 155, 0.35);
  position: relative;
  z-index: 100;
}

.top-bar-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.top-bar-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

.top-bar-badge {
  background-color: var(--color-accent-gold);
  color: #FFFFFF;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: inline-block;
  animation: pulseTurquoise 2.5s infinite;
}

@keyframes pulseTurquoise {
  0% { box-shadow: 0 0 0 0 rgba(0, 142, 155, 0.6); }
  70% { box-shadow: 0 0 0 8px rgba(0, 142, 155, 0); }
  100% { box-shadow: 0 0 0 0 rgba(0, 142, 155, 0); }
}

.top-bar-link {
  color: #38BDF8;
  text-decoration: underline;
  text-underline-offset: 3px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.top-bar-link:hover {
  color: #FFFFFF;
}

.top-bar-countdown {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  background: rgba(255, 255, 255, 0.08);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.top-bar-countdown span {
  color: #38BDF8;
  font-weight: 700;
}

/* ==========================================================================
   NAVIGATION BAR
   ========================================================================== */

.header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  background-color: rgba(240, 246, 248, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(207, 227, 232, 0.8);
  z-index: 90;
  transition: all var(--trans-normal);
}

.header.scrolled {
  background-color: rgba(255, 255, 255, 0.96);
  box-shadow: 0 4px 20px rgba(13, 32, 39, 0.06);
  height: 72px;
}

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

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
}

.logo-symbol {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, #152A32 0%, #0E1E24 100%);
  border: 1.5px solid var(--color-accent-gold);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #38BDF8;
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 700;
  box-shadow: 0 4px 12px rgba(13, 32, 39, 0.15);
  transition: transform var(--trans-normal);
}

.logo:hover .logo-symbol {
  transform: rotate(6deg) scale(1.05);
}

.logo-text-wrap {
  display: flex;
  flex-direction: column;
}

.logo-title {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-text-primary);
  line-height: 1.1;
  letter-spacing: -0.01em;
}

.logo-subtitle {
  font-size: 0.725rem;
  color: var(--color-accent-gold);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

/* Nav Menu */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  font-size: 0.925rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  position: relative;
  padding: 6px 0;
  transition: color var(--trans-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background-color: var(--color-accent-gold);
  border-radius: 2px;
  transition: width var(--trans-normal);
}

.nav-link:hover {
  color: var(--color-text-primary);
}

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

.nav-link.active {
  color: var(--color-text-primary);
  font-weight: 600;
}

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.header-phone-link {
  display: flex;
  flex-direction: column;
  text-align: right;
}

.header-phone-number {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--color-text-primary);
  letter-spacing: -0.01em;
}

.header-phone-label {
  font-size: 0.75rem;
  color: var(--color-accent-sage);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 5px;
}

.header-phone-label::before {
  content: '';
  width: 6px;
  height: 6px;
  background-color: var(--color-accent-sage);
  border-radius: 50%;
  display: inline-block;
  animation: pulseDot 2s infinite;
}

@keyframes pulseDot {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

/* Hamburger */
.hamburger {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
  z-index: 110;
}

.hamburger span {
  width: 20px;
  height: 2px;
  background-color: var(--color-text-primary);
  border-radius: 2px;
  transition: all var(--trans-normal);
}

.hamburger.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger.open span:nth-child(2) {
  opacity: 0;
  transform: translateX(10px);
}

.hamburger.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Drawer */
.mobile-nav {
  position: fixed;
  top: 0;
  right: -100%;
  width: 100%;
  max-width: 360px;
  height: 100vh;
  background-color: #FFFFFF;
  box-shadow: -10px 0 30px rgba(0, 0, 0, 0.15);
  z-index: 105;
  display: flex;
  flex-direction: column;
  padding: 90px 30px 40px;
  transition: right var(--trans-slow);
  overflow-y: auto;
}

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

.mobile-backdrop {
  position: fixed;
  top: 0; left: 0; width: 100%; height: 100%;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  z-index: 104;
  opacity: 0;
  visibility: hidden;
  transition: all var(--trans-normal);
}

.mobile-backdrop.open {
  opacity: 1;
  visibility: visible;
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 32px;
}

.mobile-nav-link {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-text-primary);
  padding: 8px 0;
  border-bottom: 1px solid var(--color-border-light);
}

.mobile-nav-footer {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* ==========================================================================
   HERO SECTION (LUXURY EDITORIAL + 3D CARDS)
   ========================================================================== */

.hero {
  padding: 48px 0 96px;
  position: relative;
  overflow: hidden;
}

.hero-glow-1 {
  position: absolute;
  top: -10%;
  left: 5%;
  width: 550px;
  height: 550px;
  background: radial-gradient(circle, rgba(0, 142, 155, 0.16) 0%, rgba(240, 246, 248, 0) 70%);
  border-radius: 50%;
  filter: blur(60px);
  pointer-events: none;
  z-index: 0;
}

.hero-glow-2 {
  position: absolute;
  top: 20%;
  right: -5%;
  width: 650px;
  height: 650px;
  background: radial-gradient(circle, rgba(2, 132, 199, 0.14) 0%, rgba(240, 246, 248, 0) 70%);
  border-radius: 50%;
  filter: blur(70px);
  pointer-events: none;
  z-index: 0;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.hero-badge-opening {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 18px;
  background: #FFFFFF;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 24px;
}

.hero-badge-opening .dot {
  width: 8px;
  height: 8px;
  background-color: var(--color-accent-gold);
  border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(0, 142, 155, 0.3);
}

.hero-title {
  font-family: var(--font-serif);
  font-size: 3.5rem;
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.025em;
  color: var(--color-text-primary);
  margin-bottom: 22px;
}

.hero-title em {
  font-style: italic;
  font-weight: 500;
  color: var(--color-accent-gold);
  position: relative;
}

.hero-title em::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 0;
  width: 100%;
  height: 8px;
  background-color: rgba(0, 142, 155, 0.18);
  z-index: -1;
  border-radius: 4px;
}

.hero-lead {
  font-size: 1.18rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
  margin-bottom: 32px;
  max-width: 580px;
}

.hero-features-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 36px;
}

.hero-chip {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background-color: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.02);
}

.hero-chip svg {
  color: var(--color-accent-gold);
  flex-shrink: 0;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.hero-trust-bar {
  display: flex;
  align-items: center;
  gap: 28px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
  width: 100%;
}

.hero-trust-item {
  display: flex;
  flex-direction: column;
}

.hero-trust-val {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--color-text-primary);
  line-height: 1.1;
}

.hero-trust-label {
  font-size: 0.8rem;
  color: var(--color-text-tertiary);
}

/* Hero Right Visual (3D Tilt Card & Overlays) */
.hero-visual-wrapper {
  position: relative;
  perspective: 1000px;
}

.hero-card-main {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  border: 4px solid #FFFFFF;
  background-color: #FFFFFF;
  transform-style: preserve-3d;
  transition: transform var(--trans-normal), box-shadow var(--trans-normal);
}

.hero-card-main:hover {
  transform: translateY(-6px) rotateY(-2deg) rotateX(2deg);
  box-shadow: 0 30px 70px rgba(13, 32, 39, 0.22);
}

.hero-card-img {
  width: 100%;
  height: 480px;
  object-fit: cover;
  transition: transform 0.8s ease;
}

.hero-card-main:hover .hero-card-img {
  transform: scale(1.04);
}

.hero-card-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 30px 24px 24px;
  background: linear-gradient(0deg, rgba(14, 30, 36, 0.9) 0%, rgba(14, 30, 36, 0.45) 70%, transparent 100%);
  color: #FFFFFF;
}

.hero-card-overlay-badge {
  display: inline-block;
  padding: 4px 10px;
  background-color: var(--color-accent-gold);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}

.hero-card-overlay-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.3;
}

/* Floating Badges on Hero */
.hero-float-badge {
  position: absolute;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.8);
  border-radius: var(--radius-lg);
  padding: 14px 18px;
  box-shadow: 0 12px 30px rgba(13, 32, 39, 0.12);
  display: flex;
  align-items: center;
  gap: 12px;
  z-index: 2;
  transition: all var(--trans-normal);
  animation: floatSlow 5s ease-in-out infinite;
}

.hero-float-badge:hover {
  transform: translateY(-5px) scale(1.04);
  background-color: #FFFFFF;
}

.hero-float-badge.badge-top-left {
  top: -20px;
  left: -28px;
  animation-delay: 0s;
}

.hero-float-badge.badge-bottom-right {
  bottom: -24px;
  right: -24px;
  animation-delay: 2.5s;
}

@keyframes floatSlow {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
}

.hero-float-icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}

.hero-float-icon.icon-gold {
  background-color: var(--color-accent-gold-light);
  color: var(--color-accent-gold-hover);
}

.hero-float-icon.icon-sage {
  background-color: var(--color-accent-sage-light);
  color: var(--color-accent-sage);
}

.hero-float-text {
  display: flex;
  flex-direction: column;
}

.hero-float-title {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--color-text-primary);
  line-height: 1.2;
}

.hero-float-desc {
  font-size: 0.775rem;
  color: var(--color-text-secondary);
}

/* ==========================================================================
   PHILOSOPHY & COMPARISON SECTION (Why "Fast Courses")
   ========================================================================== */

.comparison-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 40px;
}

.comp-card {
  background-color: var(--color-bg-card);
  border-radius: var(--radius-xl);
  padding: 32px;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: all var(--trans-normal);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.comp-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(0, 142, 155, 0.45);
}

.comp-icon-box {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background-color: var(--color-accent-gold-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  color: var(--color-accent-gold-hover);
  font-size: 1.5rem;
  transition: transform var(--trans-normal);
}

.comp-card:hover .comp-icon-box {
  transform: scale(1.1) rotate(5deg);
}

.comp-card-title {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--color-text-primary);
}

.comp-vs-block {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: auto;
  padding-top: 20px;
  border-top: 1px dashed var(--color-border);
}

.comp-side {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.885rem;
  line-height: 1.45;
}

.comp-side.side-old {
  color: var(--color-text-tertiary);
}

.comp-side.side-new {
  color: var(--color-accent-sage);
  font-weight: 600;
}

.comp-badge-pill {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 2px 7px;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.comp-badge-pill.pill-old {
  background-color: #E2ECF0;
  color: #6E8996;
}

.comp-badge-pill.pill-new {
  background-color: var(--color-accent-sage-light);
  color: var(--color-accent-sage);
}

/* ==========================================================================
   INTERACTIVE DEMO WIDGETS (WOW-EFFECT PROOFS)
   ========================================================================== */

.demo-box {
  background: linear-gradient(145deg, #FFFFFF 0%, #ECF6F8 100%);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-lg);
  padding: 40px;
  margin-top: 40px;
  position: relative;
  overflow: hidden;
}

.demo-tabs-nav {
  display: flex;
  gap: 12px;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 20px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.demo-tab-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 24px;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  background-color: var(--color-bg-secondary);
  border: 1px solid transparent;
  transition: all var(--trans-fast);
}

.demo-tab-btn:hover {
  background-color: var(--color-accent-gold-light);
  color: var(--color-accent-gold-hover);
}

.demo-tab-btn.active {
  background-color: var(--color-bg-dark);
  color: #FFFFFF;
  box-shadow: var(--shadow-md);
}

.demo-tab-content {
  display: none;
  animation: fadeIn 0.4s ease;
}

.demo-tab-content.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Interactive Math Trainer widget */
.math-widget {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.math-preview-card {
  background-color: #FFFFFF;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  position: relative;
}

.math-equation {
  font-family: var(--font-mono);
  font-size: 3rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 20px;
  letter-spacing: 0.05em;
}

.math-equation span.ans-blank {
  display: inline-block;
  min-width: 60px;
  border-bottom: 3px solid var(--color-accent-gold);
  color: var(--color-accent-gold);
  animation: blinkBorder 1.5s infinite;
}

@keyframes blinkBorder {
  0%, 100% { border-color: var(--color-accent-gold); }
  50% { border-color: transparent; }
}

.math-breakdown {
  background-color: var(--color-accent-gold-light);
  border: 1px dashed var(--color-accent-gold);
  border-radius: var(--radius-md);
  padding: 16px;
  margin-bottom: 24px;
  font-size: 0.95rem;
  color: var(--color-text-primary);
  line-height: 1.5;
  text-align: left;
}

.math-breakdown strong {
  color: var(--color-accent-gold-hover);
}

.math-options-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.math-opt-btn {
  padding: 14px;
  background-color: var(--color-bg-secondary);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-text-primary);
  transition: all var(--trans-fast);
}

.math-opt-btn:hover {
  background-color: var(--color-accent-gold-light);
  border-color: var(--color-accent-gold);
  transform: translateY(-2px);
}

.math-opt-btn.correct {
  background-color: var(--color-accent-sage-light);
  border-color: var(--color-accent-sage);
  color: var(--color-accent-sage);
  animation: pulseCorrect 0.6s ease;
}

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

/* Speed Reading widget */
.reader-widget {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.reader-screen {
  background-color: #FFFFFF;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  min-height: 240px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  box-shadow: var(--shadow-inner);
  position: relative;
}

.reader-focus-word {
  font-family: var(--font-serif);
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--color-text-primary);
  min-height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  letter-spacing: 0.02em;
}

.reader-focus-word span.highlight-char {
  color: var(--color-accent-terracotta);
}

.reader-speed-controls {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 24px;
  width: 100%;
  justify-content: center;
}

.speed-pill {
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: all var(--trans-fast);
}

.speed-pill.active {
  background-color: var(--color-accent-gold);
  color: #FFFFFF;
  border-color: var(--color-accent-gold);
}

/* ==========================================================================
   COURSE CATALOG (3D TILT CARDS & FILTERS)
   ========================================================================== */

.course-filters {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 10px 22px;
  border-radius: var(--radius-full);
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  transition: all var(--trans-fast);
}

.filter-btn:hover {
  background-color: var(--color-accent-gold-light);
  color: var(--color-accent-gold-hover);
  border-color: rgba(0, 142, 155, 0.4);
}

.filter-btn.active {
  background-color: var(--color-bg-dark);
  color: #FFFFFF;
  border-color: var(--color-bg-dark);
  box-shadow: var(--shadow-sm);
}

.courses-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

/* Card 3D tilt effect */
.course-card {
  background-color: var(--color-bg-card);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1), box-shadow 0.4s cubic-bezier(0.2, 0.8, 0.2, 1), border-color 0.3s;
  position: relative;
}

.course-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: rgba(0, 142, 155, 0.4);
}

.course-card-thumb-wrap {
  position: relative;
  height: 220px;
  overflow: hidden;
  background-color: #D6E8ED;
}

.course-card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.7s ease;
}

.course-card:hover .course-card-img {
  transform: scale(1.06);
}

.course-card-tag {
  position: absolute;
  top: 16px;
  left: 16px;
  padding: 6px 14px;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(8px);
  border-radius: var(--radius-full);
  font-size: 0.775rem;
  font-weight: 700;
  color: var(--color-text-primary);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.course-card-duration-badge {
  position: absolute;
  bottom: 16px;
  right: 16px;
  padding: 5px 12px;
  background: rgba(14, 30, 36, 0.88);
  backdrop-filter: blur(8px);
  border-radius: var(--radius-full);
  font-size: 0.775rem;
  font-weight: 600;
  color: #38BDF8;
}

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

.course-card-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 12px;
  font-size: 0.825rem;
  color: var(--color-text-tertiary);
}

.course-card-meta-item {
  display: flex;
  align-items: center;
  gap: 5px;
}

.course-card-title {
  font-family: var(--font-serif);
  font-size: 1.45rem;
  font-weight: 600;
  line-height: 1.25;
  margin-bottom: 12px;
  color: var(--color-text-primary);
}

.course-card-desc {
  font-size: 0.925rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
}

.course-card-results {
  margin-bottom: 24px;
  padding: 16px;
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-md);
}

.course-result-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--color-text-primary);
  margin-bottom: 8px;
  line-height: 1.4;
}

.course-result-item:last-child {
  margin-bottom: 0;
}

.course-result-item svg {
  color: var(--color-accent-sage);
  flex-shrink: 0;
  margin-top: 2px;
}

.course-card-footer {
  margin-top: auto;
  padding-top: 20px;
  border-top: 1px solid var(--color-border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.course-price-wrap {
  display: flex;
  flex-direction: column;
}

.course-price-label {
  font-size: 0.75rem;
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.course-price-val {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text-primary);
}

.course-card-actions {
  display: flex;
  gap: 8px;
}

/* ==========================================================================
   INTERACTIVE QUIZ (COURSE SELECTOR IN 3 STEPS)
   ========================================================================== */

.quiz-container {
  background-color: #FFFFFF;
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-lg);
  padding: 48px;
  max-width: 900px;
  margin: 0 auto;
  position: relative;
}

.quiz-progress-bar-wrap {
  width: 100%;
  height: 6px;
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-full);
  margin-bottom: 36px;
  overflow: hidden;
}

.quiz-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #00A896 0%, #008E9B 100%);
  width: 33.333%;
  transition: width 0.4s ease;
}

.quiz-step-indicator {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.quiz-step-count {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-accent-gold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.quiz-step-title {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 12px;
}

.quiz-step-sub {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  margin-bottom: 32px;
}

.quiz-options-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 36px;
}

.quiz-option-card {
  padding: 20px;
  border-radius: var(--radius-lg);
  border: 2px solid var(--color-border);
  background-color: var(--color-bg-card-subtle);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: all var(--trans-fast);
}

.quiz-option-card:hover {
  border-color: var(--color-accent-gold);
  background-color: #FFFFFF;
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.quiz-option-card.selected {
  border-color: var(--color-accent-gold);
  background-color: var(--color-accent-gold-light);
  box-shadow: 0 0 0 2px var(--color-accent-gold);
}

.quiz-option-radio {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 2px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  background-color: #FFFFFF;
  transition: all var(--trans-fast);
}

.quiz-option-card.selected .quiz-option-radio {
  border-color: var(--color-accent-gold);
}

.quiz-option-card.selected .quiz-option-radio::after {
  content: '';
  width: 10px;
  height: 10px;
  background-color: var(--color-accent-gold);
  border-radius: 50%;
}

.quiz-option-text {
  display: flex;
  flex-direction: column;
}

.quiz-option-title {
  font-weight: 700;
  font-size: 1rem;
  color: var(--color-text-primary);
  margin-bottom: 2px;
}

.quiz-option-desc {
  font-size: 0.825rem;
  color: var(--color-text-secondary);
}

.quiz-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 24px;
  border-top: 1px solid var(--color-border-light);
}

/* Quiz Result Card */
.quiz-result-box {
  background: linear-gradient(135deg, #F0F8FA 0%, #E3F1F4 100%);
  border: 2px solid var(--color-accent-gold);
  border-radius: var(--radius-xl);
  padding: 36px;
  text-align: center;
}

.quiz-result-badge {
  display: inline-block;
  padding: 6px 16px;
  background-color: var(--color-accent-gold);
  color: #FFFFFF;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}

.quiz-result-title {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 12px;
}

.quiz-result-lead {
  font-size: 1.05rem;
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto 28px;
}

.quiz-promo-banner {
  background-color: #FFFFFF;
  border: 1px dashed var(--color-accent-gold);
  border-radius: var(--radius-md);
  padding: 16px;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 30px;
}

.quiz-promo-code {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--color-accent-gold-hover);
  letter-spacing: 0.08em;
  background: var(--color-accent-gold-light);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
}

/* ==========================================================================
   ABOUT THE STUDIO & VISION SECTION
   ========================================================================== */

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-images-collage {
  position: relative;
}

.about-img-main {
  width: 100%;
  height: 480px;
  border-radius: var(--radius-xl);
  object-fit: cover;
  box-shadow: var(--shadow-lg);
  border: 4px solid #FFFFFF;
}

.about-img-sub {
  position: absolute;
  bottom: -30px;
  right: -30px;
  width: 240px;
  height: 200px;
  border-radius: var(--radius-lg);
  object-fit: cover;
  box-shadow: var(--shadow-xl);
  border: 4px solid #FFFFFF;
}

.about-renovation-card {
  position: absolute;
  top: 30px;
  left: -24px;
  background: rgba(14, 30, 36, 0.92);
  backdrop-filter: blur(10px);
  color: #FFFFFF;
  padding: 16px 20px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(56, 189, 248, 0.4);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: 260px;
}

.about-renovation-card svg {
  color: #38BDF8;
  flex-shrink: 0;
}

.about-pillars-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 36px;
}

.about-pillar-item {
  background-color: var(--color-bg-card);
  padding: 22px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.about-pillar-num {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-accent-gold);
  margin-bottom: 6px;
}

.about-pillar-title {
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: 6px;
  color: var(--color-text-primary);
}

.about-pillar-text {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

/* ==========================================================================
   OCTOBER COUNTDOWN & VIP BANNER SECTION
   ========================================================================== */

.opening-banner {
  background: linear-gradient(135deg, #13272F 0%, #0A161B 100%);
  border-radius: var(--radius-xl);
  border: 1px solid rgba(56, 189, 248, 0.35);
  box-shadow: var(--shadow-xl);
  padding: 56px 48px;
  position: relative;
  overflow: hidden;
  color: #FFFFFF;
}

.opening-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(0, 142, 155, 0.25) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.opening-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.countdown-clock {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin: 32px 0;
}

.countdown-box {
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.14);
  backdrop-filter: blur(8px);
  border-radius: var(--radius-md);
  padding: 18px 12px;
  text-align: center;
  transition: transform var(--trans-fast);
}

.countdown-box:hover {
  transform: translateY(-4px);
  border-color: #38BDF8;
}

.countdown-num {
  font-family: var(--font-mono);
  font-size: 2.4rem;
  font-weight: 700;
  color: #38BDF8;
  line-height: 1;
  margin-bottom: 6px;
}

.countdown-lbl {
  font-size: 0.75rem;
  color: var(--color-text-inverse-sub);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.opening-privileges-card {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.4);
  border-radius: var(--radius-lg);
  padding: 32px;
  backdrop-filter: blur(12px);
}

.privilege-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 18px;
  font-size: 0.95rem;
  line-height: 1.5;
}

.privilege-item:last-child {
  margin-bottom: 0;
}

.privilege-icon {
  width: 24px;
  height: 24px;
  color: #38BDF8;
  flex-shrink: 0;
  margin-top: 2px;
}

/* ==========================================================================
   REVIEWS & RESULTS SECTION
   ========================================================================== */

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.review-card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: all var(--trans-normal);
}

.review-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(0, 142, 155, 0.4);
}

.review-stars {
  color: #F59E0B;
  display: flex;
  gap: 4px;
  margin-bottom: 18px;
  font-size: 1.1rem;
}

.review-text {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.65;
  margin-bottom: 24px;
  font-style: italic;
}

.review-result-badge {
  background-color: var(--color-accent-sage-light);
  color: var(--color-accent-sage);
  padding: 8px 14px;
  border-radius: var(--radius-md);
  font-size: 0.825rem;
  font-weight: 600;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.review-author {
  margin-top: auto;
  display: flex;
  align-items: center;
  gap: 14px;
  padding-top: 18px;
  border-top: 1px solid var(--color-border-light);
}

.review-avatar-char {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-accent-gold-light) 0%, #CCE6EC 100%);
  color: var(--color-accent-gold-hover);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
}

.review-author-info {
  display: flex;
  flex-direction: column;
}

.review-author-name {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--color-text-primary);
}

.review-author-child {
  font-size: 0.8rem;
  color: var(--color-text-tertiary);
}

/* ==========================================================================
   FAQ ACCORDION
   ========================================================================== */

.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--trans-fast);
}

.faq-item:hover {
  border-color: rgba(0, 142, 155, 0.4);
}

.faq-item.open {
  border-color: var(--color-accent-gold);
  box-shadow: var(--shadow-sm);
}

.faq-question {
  width: 100%;
  padding: 22px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-align: left;
  font-family: var(--font-sans);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text-primary);
  cursor: pointer;
  background: none;
}

.faq-icon-toggle {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--color-bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-primary);
  flex-shrink: 0;
  transition: transform var(--trans-fast), background-color var(--trans-fast);
}

.faq-item.open .faq-icon-toggle {
  transform: rotate(45deg);
  background-color: var(--color-accent-gold);
  color: #FFFFFF;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 28px;
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

.faq-item.open .faq-answer {
  padding-bottom: 24px;
}

/* ==========================================================================
   CONTACT & BOOKING SECTION
   ========================================================================== */

.contact-card-box {
  background-color: #FFFFFF;
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
}

.contact-info-side {
  background: linear-gradient(135deg, #0E1E24 0%, #172F38 100%);
  color: #FFFFFF;
  padding: 56px 48px;
  display: flex;
  flex-direction: column;
}

.contact-info-title {
  font-family: var(--font-serif);
  font-size: 2.2rem;
  font-weight: 600;
  margin-bottom: 16px;
  color: #FFFFFF;
}

.contact-info-lead {
  font-size: 1rem;
  color: var(--color-text-inverse-sub);
  margin-bottom: 36px;
  line-height: 1.6;
}

.contact-details-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin-bottom: 40px;
}

.contact-detail-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.contact-detail-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #38BDF8;
  flex-shrink: 0;
}

.contact-detail-text {
  display: flex;
  flex-direction: column;
}

.contact-detail-lbl {
  font-size: 0.775rem;
  color: var(--color-text-inverse-sub);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 2px;
}

.contact-detail-val {
  font-weight: 600;
  font-size: 1.05rem;
  color: #FFFFFF;
}

.contact-messengers-row {
  display: flex;
  gap: 12px;
  margin-top: auto;
  flex-wrap: wrap;
}

.btn-messenger {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
  transition: all var(--trans-fast);
}

.btn-whatsapp {
  background-color: #25D366;
  color: #FFFFFF;
}

.btn-whatsapp:hover {
  background-color: #20BA5A;
  transform: translateY(-2px);
}

.btn-telegram {
  background-color: #0088CC;
  color: #FFFFFF;
}

.btn-telegram:hover {
  background-color: #0077B5;
  transform: translateY(-2px);
}

/* Contact Form Side */
.contact-form-side {
  padding: 56px 48px;
  background-color: #FFFFFF;
}

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

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 8px;
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 14px 18px;
  border-radius: var(--radius-md);
  border: 1.5px solid var(--color-border);
  background-color: var(--color-bg-card-subtle);
  color: var(--color-text-primary);
  font-size: 0.95rem;
  transition: all var(--trans-fast);
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--color-accent-gold);
  background-color: #FFFFFF;
  box-shadow: 0 0 0 4px rgba(0, 142, 155, 0.15);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-privacy-note {
  font-size: 0.775rem;
  color: var(--color-text-tertiary);
  margin-top: 14px;
  line-height: 1.4;
  text-align: center;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */

.footer {
  background-color: #081419;
  color: #FFFFFF;
  padding: 64px 0 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.footer-brand p {
  font-size: 0.9rem;
  color: var(--color-text-inverse-sub);
  line-height: 1.6;
  max-width: 320px;
}

.footer-col-title {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 600;
  color: #FFFFFF;
  margin-bottom: 20px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-link {
  font-size: 0.885rem;
  color: var(--color-text-inverse-sub);
  transition: color var(--trans-fast);
}

.footer-link:hover {
  color: #38BDF8;
}

.footer-bottom {
  padding-top: 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.825rem;
  color: var(--color-text-tertiary);
  flex-wrap: wrap;
  gap: 16px;
}

/* ==========================================================================
   MODAL DIALOGS
   ========================================================================== */

.modal-backdrop {
  position: fixed;
  top: 0; left: 0; width: 100%; height: 100%;
  background: rgba(8, 20, 25, 0.75);
  backdrop-filter: blur(8px);
  z-index: 200;
  opacity: 0;
  visibility: hidden;
  transition: all var(--trans-normal);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-backdrop.active {
  opacity: 1;
  visibility: visible;
}

.modal-window {
  background-color: #FFFFFF;
  border-radius: var(--radius-xl);
  max-width: 620px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--color-border);
  transform: translateY(20px) scale(0.97);
  transition: transform var(--trans-normal);
  position: relative;
  padding: 40px;
}

.modal-backdrop.active .modal-window {
  transform: translateY(0) scale(1);
}

.modal-close-btn {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: var(--color-bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--trans-fast);
}

.modal-close-btn:hover {
  background-color: var(--color-bg-dark);
  color: #FFFFFF;
}

.modal-header {
  margin-bottom: 24px;
}

.modal-title {
  font-family: var(--font-serif);
  font-size: 1.85rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 8px;
}

.modal-sub {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
}

/* ==========================================================================
   FLOATING ACTION BUTTON (SPEED CONTACT)
   ========================================================================== */

.floating-action-bar {
  position: fixed;
  bottom: 28px;
  right: 28px;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 12px;
  z-index: 80;
}

.fab-btn {
  width: 54px;
  height: 54px;
  border-radius: 50%;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFFFFF;
  transition: transform var(--trans-normal);
  cursor: pointer;
  position: relative;
}

.fab-btn:hover {
  transform: scale(1.1);
}

.fab-main {
  background: linear-gradient(135deg, #25D366 0%, #128C7E 100%);
}

.fab-tooltip {
  position: absolute;
  right: 64px;
  background-color: var(--color-bg-dark);
  color: #FFFFFF;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transform: translateX(10px);
  transition: all var(--trans-fast);
}

.fab-btn:hover .fab-tooltip {
  opacity: 1;
  transform: translateX(0);
}

.back-to-top {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  color: var(--color-text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transition: all var(--trans-fast);
}

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

.back-to-top:hover {
  background-color: var(--color-accent-gold);
  color: #FFFFFF;
  border-color: var(--color-accent-gold);
  transform: translateY(-3px);
}

/* ==========================================================================
   TOAST NOTIFICATIONS
   ========================================================================== */

.toast-notification {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background-color: var(--color-bg-dark);
  color: #FFFFFF;
  padding: 16px 28px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-accent-gold);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.3);
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.95rem;
  font-weight: 500;
  z-index: 300;
  opacity: 0;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.toast-notification.active {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* ==========================================================================
   RESPONSIVE DESIGN (TABLET & MOBILE)
   ========================================================================== */

@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  
  .hero-title {
    font-size: 2.85rem;
  }
  
  .hero-visual-wrapper {
    max-width: 580px;
    margin: 0 auto;
  }
  
  .courses-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .comparison-grid {
    grid-template-columns: 1fr;
  }
  
  .math-widget, .reader-widget {
    grid-template-columns: 1fr;
  }
  
  .about-grid {
    grid-template-columns: 1fr;
  }
  
  .about-img-sub {
    right: 0;
  }
  
  .opening-grid {
    grid-template-columns: 1fr;
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --nav-height: 70px;
  }
  
  .section {
    padding: 64px 0;
  }
  
  .nav-menu, .header-phone-link {
    display: none;
  }
  
  .hamburger {
    display: flex;
  }
  
  .hero-title {
    font-size: 2.3rem;
  }
  
  .section-title {
    font-size: 2.1rem;
  }
  
  .courses-grid {
    grid-template-columns: 1fr;
  }
  
  .quiz-options-grid {
    grid-template-columns: 1fr;
  }
  
  .reviews-grid {
    grid-template-columns: 1fr;
  }
  
  .countdown-clock {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .contact-info-side, .contact-form-side {
    padding: 36px 24px;
  }
  
  .quiz-container {
    padding: 28px 20px;
  }
  
  .demo-box {
    padding: 24px 18px;
  }
  
  .hero-float-badge.badge-top-left {
    left: 0;
    top: -10px;
  }
  
  .hero-float-badge.badge-bottom-right {
    right: 0;
    bottom: -10px;
  }
  
  .footer-top {
    grid-template-columns: 1fr;
  }
}