/* =============================================
   TestPrepMagic Website - Premium Dark Design
   ============================================= */

:root {
  --primary: #6C63FF;
  --primary-light: #8B84FF;
  --primary-dark: #4C44DF;
  --accent: #FFD700;
  --accent-orange: #FF7B00;
  --success: #00D97E;
  --danger: #FF4757;
  --bg-base: #0A0B14;
  --bg-surface: #0F1022;
  --bg-card: #141629;
  --bg-card-hover: #1A1E38;
  --bg-glass: rgba(20, 22, 41, 0.7);
  --border: rgba(108, 99, 255, 0.15);
  --border-hover: rgba(108, 99, 255, 0.4);
  --text-primary: #FFFFFF;
  --text-secondary: rgba(255,255,255,0.7);
  --text-muted: rgba(255,255,255,0.45);
  --gradient-primary: linear-gradient(135deg, #6C63FF, #FF7B00);
  --gradient-gold: linear-gradient(135deg, #FFD700, #FFA500);
  --gradient-hero: linear-gradient(135deg, #6C63FF 0%, #8B5CF6 40%, #EC4899 100%);
  --shadow-card: 0 4px 24px rgba(0,0,0,0.4);
  --shadow-hover: 0 8px 40px rgba(108, 99, 255, 0.3);
  --shadow-glow: 0 0 60px rgba(108, 99, 255, 0.2);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --font-main: 'Outfit', system-ui, -apple-system, sans-serif;
  --font-mono: 'Space Grotesk', monospace;
  --nav-height: 72px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==================== Reset ==================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-main);
  background: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
img, video { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
::selection { background: var(--primary); color: white; }

::-webkit-scrollbar-thumb { background: var(--primary); border-radius: 3px; }

.hidden { display: none !important; }
.collapsed { display: none !important; }

/* ==================== Particle Canvas ==================== */
#particle-canvas {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.4;
}

/* ==================== Navigation ==================== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--nav-height);
  border-bottom: 1px solid transparent;
  transition: var(--transition);
}
.navbar.scrolled {
  background: rgba(10, 11, 20, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom-color: var(--border);
  box-shadow: 0 4px 32px rgba(0,0,0,0.4);
}
.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}
.logo-icon {
  width: 40px; height: 40px;
  background: var(--gradient-primary);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem; font-weight: 900;
  box-shadow: 0 0 20px rgba(108, 99, 255, 0.5);
}
.logo-accent { color: var(--primary-light); }
.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-link {
  padding: 8px 16px;
  color: var(--text-secondary);
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  font-size: 0.95rem;
}
.nav-link:hover { color: white; background: rgba(255,255,255,0.05); }
.nav-cta {
  padding: 10px 22px;
  background: var(--gradient-primary);
  color: white;
  font-weight: 600;
  border-radius: 40px;
  font-size: 0.9rem;
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(108,99,255,0.4);
}
.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(108,99,255,0.6);
}
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}
.nav-hamburger span {
  display: block;
  width: 22px; height: 2px;
  background: white;
  border-radius: 2px;
  transition: var(--transition);
}

/* ==================== Mobile Menu ==================== */
.mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0; right: 0;
  background: rgba(10, 11, 20, 0.97);
  backdrop-filter: blur(20px);
  z-index: 999;
  flex-direction: column;
  padding: 24px;
  gap: 4px;
  border-bottom: 1px solid var(--border);
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  padding: 14px 20px;
  color: var(--text-secondary);
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  font-size: 1.05rem;
}
.mobile-menu a:hover { color: white; background: rgba(255,255,255,0.05); }
.mobile-cta {
  margin-top: 8px;
  background: var(--gradient-primary) !important;
  color: white !important;
  text-align: center;
  border-radius: 40px !important;
  padding: 14px 20px !important;
  font-weight: 600 !important;
}

/* ==================== Sections Base ==================== */
section { position: relative; z-index: 1; }
.section-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 100px 24px;
}
.section-header {
  text-align: center;
  margin-bottom: 64px;
}
.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  background: rgba(108, 99, 255, 0.1);
  border: 1px solid rgba(108, 99, 255, 0.3);
  border-radius: 40px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--primary-light);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 20px;
}
.section-title {
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 16px;
}
.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.7;
}
.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ==================== Buttons ==================== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  background: var(--gradient-primary);
  color: white;
  font-weight: 700;
  font-size: 1rem;
  border-radius: 50px;
  transition: var(--transition);
  box-shadow: 0 4px 24px rgba(108,99,255,0.5);
  font-family: var(--font-main);
}
.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 40px rgba(108,99,255,0.7);
}
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  background: transparent;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 1rem;
  border-radius: 50px;
  border: 1px solid var(--border-hover);
  transition: var(--transition);
}
.btn-secondary:hover {
  background: rgba(108,99,255,0.1);
  border-color: var(--primary);
  transform: translateY(-2px);
}

/* ==================== Hero ==================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-height);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -200px; left: -200px;
  width: 700px; height: 700px;
  background: radial-gradient(circle, rgba(108,99,255,0.25) 0%, transparent 70%);
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -200px; right: -100px;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(255,123,0,0.12) 0%, transparent 70%);
  pointer-events: none;
}
.hero-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 80px 24px;
  max-width: 680px;
  padding-left: 5vw;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 20px;
  background: rgba(0, 217, 126, 0.1);
  border: 1px solid rgba(0, 217, 126, 0.3);
  border-radius: 40px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--success);
  margin-bottom: 28px;
  animation: fadeSlideUp 0.6s ease forwards;
}
.badge-dot {
  width: 8px; height: 8px;
  background: var(--success);
  border-radius: 50%;
  animation: pulse 2s infinite;
}
.hero-title {
  font-size: clamp(2.5rem, 5.5vw, 4.5rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1.08;
  margin-bottom: 24px;
  animation: fadeSlideUp 0.6s 0.1s ease both;
}
.hero-subtitle {
  font-size: 1.18rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 40px;
  max-width: 560px;
  animation: fadeSlideUp 0.6s 0.2s ease both;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 56px;
  animation: fadeSlideUp 0.6s 0.3s ease both;
}
.hero-stats {
  display: flex;
  align-items: center;
  gap: 0;
  flex-wrap: wrap;
  animation: fadeSlideUp 0.6s 0.4s ease both;
}
.stat-item {
  display: flex;
  flex-direction: column;
  padding: 0 28px;
}
.stat-item:first-child { padding-left: 0; }
.stat-number {
  font-size: 2rem;
  font-weight: 900;
  font-family: var(--font-mono);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}
.stat-suffix {
  font-size: 1.5rem;
  font-weight: 900;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}
.stat-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-top: 4px;
}
.stat-divider {
  width: 1px;
  height: 36px;
  background: var(--border);
}

/* ==================== Floating Hero Visual ==================== */
.hero-visual {
  position: absolute;
  right: 4vw;
  top: 50%;
  transform: translateY(-50%);
  width: min(500px, 45vw);
  height: 560px;
  display: none;
}
@media (min-width: 1024px) { .hero-visual { display: block; } }

.math-card {
  position: absolute;
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px;
  width: 280px;
  box-shadow: var(--shadow-card);
  transition: var(--transition);
  animation: float 6s ease-in-out infinite;
}
.math-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-hover);
}
.card-1 { top: 0; left: 0; animation-delay: 0s; }
.card-2 { bottom: 40px; right: 0; animation-delay: 2s; }
.card-3 { top: 45%; left: 30%; transform: translateX(-50%); width: 240px; animation-delay: 4s; }
.card-tag {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--primary-light);
  background: rgba(108,99,255,0.1);
  padding: 3px 10px;
  border-radius: 20px;
  display: inline-block;
  margin-bottom: 12px;
}
.card-question {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 12px;
}
.card-meta {
  font-size: 0.78rem;
  color: var(--accent);
  font-weight: 600;
}
.floating-symbol {
  position: absolute;
  font-size: 2.5rem;
  font-weight: 900;
  opacity: 0.08;
  pointer-events: none;
  animation: floatSym 8s ease-in-out infinite;
  color: var(--primary-light);
}
.sym-1 { top: 15%; left: -10px; animation-delay: 0s; font-size: 3rem; }
.sym-2 { top: 5%; right: 20%; animation-delay: 1s; }
.sym-3 { bottom: 20%; left: 50%; animation-delay: 2s; font-size: 3.5rem; }
.sym-4 { top: 60%; right: -5px; animation-delay: 3s; }
.sym-5 { bottom: 5%; right: 30%; animation-delay: 0.5s; font-size: 3rem; }
.sym-6 { top: 30%; left: 10%; animation-delay: 4s; }

/* ==================== Features ==================== */
.features {
  background: linear-gradient(180deg, var(--bg-base) 0%, var(--bg-surface) 100%);
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 24px;
}
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--gradient-primary);
  opacity: 0;
  transition: var(--transition);
}
.feature-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.feature-card:hover::before { opacity: 1; }
.feature-card.featured {
  border-color: rgba(108,99,255,0.4);
  background: linear-gradient(135deg, var(--bg-card) 0%, rgba(108,99,255,0.08) 100%);
}
.feature-card.featured::before { opacity: 1; }
.feature-badge-tag {
  position: absolute;
  top: 20px; right: 20px;
  font-size: 0.72rem;
  font-weight: 700;
  background: var(--gradient-gold);
  color: #1a1200;
  padding: 4px 12px;
  border-radius: 20px;
}
.feature-icon {
  width: 56px; height: 56px;
  background: rgba(108,99,255,0.12);
  border: 1px solid rgba(108,99,255,0.25);
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px;
  color: var(--primary-light);
  transition: var(--transition);
}
.feature-card:hover .feature-icon {
  background: rgba(108,99,255,0.2);
  box-shadow: 0 0 20px rgba(108,99,255,0.3);
}
.feature-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 12px;
  line-height: 1.3;
}
.feature-card p {
  color: var(--text-secondary);
  line-height: 1.7;
  font-size: 0.95rem;
  margin-bottom: 20px;
}
.feature-link {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--primary-light);
  transition: var(--transition);
  display: inline-flex; align-items: center; gap: 6px;
}
.feature-link:hover { color: white; gap: 10px; }

/* ==================== Olympiad Showcase ==================== */
.olympiad-showcase {
  background: var(--bg-surface);
}
.questions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 20px;
  margin-bottom: 48px;
}
.question-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: var(--transition);
  cursor: pointer;
}
.question-card:hover {
  border-color: var(--border-hover);
  box-shadow: 0 4px 24px rgba(108,99,255,0.15);
  transform: translateY(-2px);
}
.q-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
.q-tag {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.q-olympiad { background: rgba(108,99,255,0.15); color: var(--primary-light); }
.q-puzzle { background: rgba(0,217,126,0.12); color: var(--success); }
.q-jee { background: rgba(255,123,0,0.12); color: var(--accent-orange); }
.q-cbse { background: rgba(255,71,87,0.12); color: var(--danger); }
.q-difficulty {
  font-size: 0.7rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 20px;
}
.q-hard { background: rgba(255,71,87,0.08); color: var(--danger); border: 1px solid rgba(255,71,87,0.2); }
.q-medium { background: rgba(255,200,0,0.08); color: #FFD700; border: 1px solid rgba(255,200,0,0.2); }
.q-easy { background: rgba(0,217,126,0.08); color: var(--success); border: 1px solid rgba(0,217,126,0.2); }
.q-text {
  font-size: 0.98rem;
  font-weight: 500;
  color: var(--text-primary);
  line-height: 1.65;
  margin-bottom: 14px;
}
.q-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}
.q-topic {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}
.q-grade {
  font-size: 0.78rem;
  color: var(--text-muted);
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  padding: 2px 10px;
  border-radius: 20px;
}
.q-answer {
  background: rgba(0,0,0,0.2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
  margin-bottom: 14px;
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  transition: max-height 0.4s ease, opacity 0.3s ease, padding 0.3s ease;
  padding-top: 0; padding-bottom: 0;
}
.q-answer.open {
  max-height: 2000px !important;
  opacity: 1 !important;
  padding: 16px;
}
.q-answer-text.open {
  max-height: 2000px !important;
  opacity: 1 !important;
  padding: 10px 0;
}
.q-answer-label {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--primary-light);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}
.q-answer-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, opacity 0.3s ease;
}
.q-answer-text.open {
  max-height: 500px;
  opacity: 1;
}
.q-answer-text.collapsed {
  max-height: 0;
  opacity: 0;
}
.q-answer-text strong { color: var(--accent); }
.q-toggle {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary-light);
  background: rgba(108,99,255,0.08);
  border: 1px solid rgba(108,99,255,0.2);
  padding: 8px 18px;
  border-radius: 50px;
  transition: var(--transition);
}
.q-toggle:hover {
  background: rgba(108,99,255,0.2);
  border-color: var(--primary);
}
.questions-cta {
  text-align: center;
}
.cta-subtext {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-top: 12px;
}

/* ==================== Topics ==================== */
.topics {
  background: var(--bg-base);
}
.topics-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-bottom: 64px;
}
.topic-chip {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 40px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
  cursor: default;
}
.topic-chip:hover {
  border-color: var(--primary);
  color: white;
  background: rgba(108,99,255,0.1);
  transform: translateY(-2px);
}
.exams-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}
.exam-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.exam-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
}
.exam-icon { font-size: 1.8rem; }
.exam-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
}
.exam-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ==================== Testimonials ==================== */
.testimonials {
  background: var(--bg-surface);
}
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}
.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 30px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.testimonial-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.featured-testimonial {
  border-color: rgba(108,99,255,0.35);
  background: linear-gradient(135deg, var(--bg-card), rgba(108,99,255,0.06));
}
.stars { color: var(--accent); font-size: 1rem; letter-spacing: 2px; }
.testimonial-card p {
  color: var(--text-secondary);
  line-height: 1.75;
  font-size: 0.98rem;
  font-style: italic;
  flex: 1;
}
.testimonial-card cite {
  display: flex;
  align-items: center;
  gap: 12px;
  font-style: normal;
}
.reviewer-avatar {
  width: 44px; height: 44px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800;
  font-size: 1.1rem;
  flex-shrink: 0;
}
.testimonial-card cite strong {
  display: block;
  font-size: 0.95rem;
  font-weight: 700;
}
.testimonial-card cite span {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ==================== Download ==================== */
.download {
  background: var(--bg-base);
  padding: 80px 24px;
}
.download-container {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  background: linear-gradient(135deg, rgba(108,99,255,0.08) 0%, rgba(255,123,0,0.05) 100%);
  border: 1px solid rgba(108,99,255,0.25);
  border-radius: var(--radius-xl);
  padding: 64px 48px;
  text-align: center;
  overflow: hidden;
}
.download-glow {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 600px; height: 300px;
  background: radial-gradient(ellipse, rgba(108,99,255,0.15) 0%, transparent 70%);
  pointer-events: none;
}
.download-content { position: relative; z-index: 1; }
.download-badge {
  display: inline-block;
  padding: 6px 18px;
  background: rgba(108,99,255,0.1);
  border: 1px solid rgba(108,99,255,0.3);
  border-radius: 40px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--primary-light);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 20px;
}
.download-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 16px;
}
.download-subtitle {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 520px;
  margin: 0 auto 40px;
  line-height: 1.7;
}
.download-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 20px;
}
.store-btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 14px 28px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-md);
  color: white;
  transition: var(--transition);
  min-width: 180px;
}
.store-btn:hover {
  background: rgba(255,255,255,0.12);
  border-color: rgba(255,255,255,0.25);
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.3);
}
.store-label { display: block; font-size: 0.72rem; color: var(--text-muted); }
.store-name { display: block; font-size: 1rem; font-weight: 700; margin-top: 2px; }
.download-note {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ==================== Footer ==================== */
.footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
}
.footer-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 64px 24px 40px;
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 48px;
}
.footer-brand p {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.7;
  margin-top: 16px;
  max-width: 280px;
}
.footer-links { display: contents; }
.footer-col h4 {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 16px;
}
.footer-col a {
  display: block;
  color: var(--text-secondary);
  font-size: 0.92rem;
  padding: 5px 0;
  transition: var(--transition);
}
.footer-col a:hover { color: white; padding-left: 4px; }
.footer-bottom {
  text-align: center;
  padding: 20px 24px;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.82rem;
}

/* ==================== Animations ==================== */
@keyframes fadeSlideUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-16px); }
}
@keyframes floatSym {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  33% { transform: translateY(-12px) rotate(5deg); }
  66% { transform: translateY(8px) rotate(-5deg); }
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}
@keyframes shimmer {
  0% { background-position: -200% center; }
  100% { background-position: 200% center; }
}

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

/* ==================== Responsive ==================== */
@media (max-width: 1024px) {
  .footer-container {
    grid-template-columns: 1fr 1fr;
  }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }
  .hero-container {
    padding-left: 24px;
    text-align: center;
    max-width: 100%;
  }
  .hero-actions { justify-content: center; }
  .hero-stats { justify-content: center; }
  .stat-item:first-child { padding-left: 28px; }
  .features-grid { grid-template-columns: 1fr; }
  .questions-grid { grid-template-columns: 1fr; }
  .testimonials-grid { grid-template-columns: 1fr; }
  .exams-grid { grid-template-columns: 1fr 1fr; }
  .footer-container { grid-template-columns: 1fr; gap: 32px; }
  .footer-brand { grid-column: auto; }
  .download-container { padding: 40px 24px; }
}
@media (max-width: 480px) {
  .section-container { padding: 64px 20px; }
  .exams-grid { grid-template-columns: 1fr; }
  .hero-title { font-size: 2.2rem; }
  .stat-item { padding: 0 16px; }
  .stat-item:first-child { padding-left: 16px; }
  .download-buttons { flex-direction: column; align-items: center; }
}