:root {
  --bg-dark: #f8fafc;
  --bg-card: rgba(15, 23, 42, 0.03);
  --bg-card-hover: rgba(15, 23, 42, 0.05);
  --border-glass: rgba(15, 23, 42, 0.08);
  --border-glass-bright: rgba(15, 23, 42, 0.15);
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --accent-gold: #f5bc57;
  --accent-amber: #eab308;
  --accent-blue: #38bdf8;
  --accent-indigo: #6366f1;
  --accent-teal: #2dd4bf;
  --accent-gradient: linear-gradient(135deg, #f5bc57 0%, #eab308 50%, #f97316 100%);
  --accent-glow: rgba(245, 188, 87, 0.12);
  --font-heading: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --max-width: 1200px;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 36px;
  --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

:root.dark-theme {
  --bg-dark: #07090e;
  --bg-card: rgba(255, 255, 255, 0.035);
  --bg-card-hover: rgba(255, 255, 255, 0.06);
  --border-glass: rgba(255, 255, 255, 0.09);
  --border-glass-bright: rgba(255, 255, 255, 0.2);
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent-glow: rgba(245, 188, 87, 0.25);
}

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

html {
  scroll-behavior: smooth;
  color-scheme: light dark;
  font-family: var(--font-body);
  background-color: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.4s ease, color 0.4s ease;
}

body {
  overflow-x: hidden;
  position: relative;
  background: var(--bg-dark);
}

/* Atmospheric Background Elements */
.bg-glow-1 {
  position: absolute;
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  width: 90vw;
  max-width: 1000px;
  height: 600px;
  background: radial-gradient(circle, rgba(245, 188, 87, 0.12) 0%, rgba(99, 102, 241, 0.08) 40%, transparent 70%);
  filter: blur(80px);
  pointer-events: none;
  z-index: 0;
}

.bg-glow-2 {
  position: absolute;
  top: 1800px;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.1) 0%, transparent 70%);
  filter: blur(100px);
  pointer-events: none;
  z-index: 0;
}

.bg-glow-3 {
  position: absolute;
  top: 3400px;
  left: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(245, 188, 87, 0.08) 0%, transparent 70%);
  filter: blur(100px);
  pointer-events: none;
  z-index: 0;
}

/* Container */
.container {
  width: min(var(--max-width), 92vw);
  margin-inline: auto;
}

/* Glassmorphism */
.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  transition: var(--transition);
}

.glass-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-glass-bright);
}

/* Header & Navbar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 76px;
  z-index: 1000;
  display: flex;
  align-items: center;
  transition: var(--transition);
  border-bottom: 1px solid transparent;
}

.navbar.scrolled {
  background: rgba(248, 250, 252, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom-color: var(--border-glass);
}

:root.dark-theme .navbar.scrolled {
  background: rgba(7, 9, 14, 0.85);
}

.btn-appstore {
  background: #0f172a;
  color: #ffffff !important;
}

.btn-appstore:hover {
  background: #000000;
  color: #ffffff !important;
}

:root.dark-theme .btn-appstore {
  background: #ffffff;
  color: #000000 !important;
}

:root.dark-theme .btn-appstore:hover {
  background: #f1f5f9;
  color: #000000 !important;
}

.webapp-card h3 {
  color: var(--text-primary) !important;
}

:root.light-theme .webapp-card p {
  color: #475569 !important;
}

:root.light-theme .review-card p {
  color: #475569 !important;
}

:root.light-theme .review-info strong {
  color: #0f172a !important;
}

.footer {
  background: #f8fafc;
  color: #0f172a;
  border-top: 1px solid rgba(15, 23, 42, 0.08);
}

.footer h3, .footer h4 {
  color: #0f172a;
}

.footer-brand p, .footer-links-list a {
  color: #475569;
}

.footer-bottom {
  color: #64748b;
  border-top: 1px solid rgba(15, 23, 42, 0.08);
}

:root.dark-theme .footer {
  background: rgba(5, 7, 10, 0.95);
  color: #f8fafc;
  border-top: 1px solid rgba(255, 255, 255, 0.09);
}

:root.dark-theme .footer h3, :root.dark-theme .footer h4 {
  color: #f8fafc;
}

:root.dark-theme .footer-brand p, :root.dark-theme .footer-links-list a {
  color: #94a3b8;
}

:root.dark-theme .footer-bottom {
  color: #64748b;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(var(--max-width), 92vw);
  margin-inline: auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  text-decoration: none;
  color: var(--text-primary);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.brand img {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  transition: var(--transition);
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1.2rem;
}

/* Language Selector */
.lang-selector {
  position: relative;
}

.lang-select {
  appearance: none;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-glass);
  color: var(--text-primary);
  padding: 0.45rem 2.2rem 0.45rem 0.85rem;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  outline: none;
  transition: var(--transition);
  font-family: var(--font-body);
}

.lang-select:hover, .lang-select:focus {
  border-color: var(--accent-gold);
  background: rgba(255, 255, 255, 0.1);
}

.lang-select option {
  background-color: #0f172a;
  color: var(--text-primary);
}

.lang-selector-icon {
  position: absolute;
  right: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
  font-size: 0.75rem;
  color: var(--text-secondary);
}

/* App Store Button */
.btn-appstore {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  background: var(--text-primary);
  color: #000;
  padding: 0.65rem 1.35rem;
  border-radius: 999px;
  font-size: 0.88rem;
  font-weight: 700;
  text-decoration: none;
  transition: var(--transition);
  box-shadow: 0 10px 25px rgba(255, 255, 255, 0.1);
}

.btn-appstore:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 30px rgba(245, 188, 87, 0.25);
  background: #ffffff;
}

.btn-appstore svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.btn-appstore-details {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
  text-align: left;
}

.btn-appstore-details small {
  font-size: 0.62rem;
  font-weight: 500;
  opacity: 0.8;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.btn-appstore-details strong {
  font-size: 0.95rem;
  font-weight: 800;
}

/* Mobile Menu Toggle */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
}

/* HERO SECTION */
.hero {
  position: relative;
  padding-top: 140px;
  padding-bottom: 80px;
  text-align: center;
  overflow: hidden;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.4rem 1.1rem;
  border-radius: 999px;
  background: rgba(245, 188, 87, 0.1);
  border: 1px solid rgba(245, 188, 87, 0.25);
  color: var(--accent-gold);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 1.8rem;
}

.hero-badge-pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-gold);
  box-shadow: 0 0 10px var(--accent-gold);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { opacity: 0.4; transform: scale(0.9); }
  50% { opacity: 1; transform: scale(1.15); }
  100% { opacity: 0.4; transform: scale(0.9); }
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2.8rem, 6.2vw, 5.4rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.03em;
  max-width: 900px;
  margin-inline: auto;
  margin-bottom: 1.5rem;
  text-wrap: balance;
}

.hero-title em {
  font-style: normal;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 680px;
  margin-inline: auto;
  margin-bottom: 2.5rem;
  line-height: 1.6;
}

.hero-ctas {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.2rem;
  flex-wrap: wrap;
  margin-bottom: 3.5rem;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.8rem 1.6rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-glass);
  color: var(--text-primary);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 600;
  transition: var(--transition);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--border-glass-bright);
  transform: translateY(-2px);
}

/* Device Mockups Frame */
.hero-mockup-wrapper {
  position: relative;
  max-width: 1050px;
  margin-inline: auto;
  margin-top: 1rem;
}

.hero-phone-frame {
  position: relative;
  width: min(320px, 75vw);
  margin-inline: auto;
  border-radius: 46px;
  padding: 8px;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.2), rgba(255, 255, 255, 0.03));
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.6), 0 0 40px var(--accent-glow);
}

.hero-phone-frame img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 38px;
}

/* PROMOTIONAL VIDEOS */
.promo-videos-section {
  position: relative;
  z-index: 1;
  padding: 90px 0 100px;
  scroll-margin-top: 84px;
}

.promo-videos-section::before {
  content: '';
  position: absolute;
  inset: 12% 18% auto;
  height: 62%;
  background: radial-gradient(circle, var(--accent-glow), transparent 68%);
  filter: blur(56px);
  pointer-events: none;
  z-index: -1;
}

.promo-videos-header {
  margin-bottom: 3rem;
}

.promo-videos-intro {
  color: var(--text-secondary);
  margin-top: 0.75rem;
  font-size: 1.05rem;
}

.promo-videos-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 320px));
  justify-content: center;
  gap: clamp(1rem, 3vw, 2.5rem);
}

.promo-video-card {
  min-width: 0;
}

.promo-video-frame {
  position: relative;
  aspect-ratio: 9 / 16;
  overflow: hidden;
  border-radius: 34px;
  padding: 7px;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.74), rgba(255, 255, 255, 0.12));
  border: 1px solid var(--border-glass-bright);
  box-shadow: 0 32px 70px rgba(15, 23, 42, 0.16), 0 0 36px var(--accent-glow);
  isolation: isolate;
}

:root.dark-theme .promo-video-frame {
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.18), rgba(255, 255, 255, 0.025));
  box-shadow: 0 32px 80px rgba(0, 0, 0, 0.48), 0 0 40px var(--accent-glow);
}

.promo-video {
  width: 100%;
  height: 100%;
  display: block;
  border-radius: 27px;
  object-fit: cover;
  background: #05070a;
}

.promo-video-shade {
  position: absolute;
  inset: 7px;
  border-radius: 27px;
  background: linear-gradient(180deg, rgba(7, 9, 14, 0.04), rgba(7, 9, 14, 0.28));
  pointer-events: none;
  transition: opacity 0.28s ease;
}

.promo-play-button {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 70px;
  height: 70px;
  display: grid;
  place-items: center;
  transform: translate(-50%, -50%);
  border: 1px solid rgba(255, 255, 255, 0.58);
  border-radius: 50%;
  color: #fff;
  background: rgba(7, 9, 14, 0.54);
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.28);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  cursor: pointer;
  transition: transform 0.25s ease, background-color 0.25s ease, opacity 0.2s ease;
}

.promo-play-button svg {
  width: 27px;
  height: 27px;
  margin-left: 3px;
  fill: currentColor;
}

.promo-play-button:hover {
  transform: translate(-50%, -50%) scale(1.07);
  background: rgba(7, 9, 14, 0.72);
}

.promo-play-button:focus-visible {
  outline: 3px solid var(--accent-gold);
  outline-offset: 5px;
}

.promo-video-card.is-playing .promo-play-button,
.promo-video-card.is-playing .promo-video-shade {
  opacity: 0;
  pointer-events: none;
}

.promo-video-card figcaption {
  margin-top: 1.15rem;
  color: var(--text-secondary);
  font-size: 0.92rem;
  font-weight: 600;
  text-align: center;
  letter-spacing: -0.01em;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* REVIEWS MARQUEE / CAROUSEL */
.reviews-section {
  padding: 80px 0;
  position: relative;
  z-index: 1;
  overflow: hidden;
}

.section-header {
  text-align: center;
  max-width: 650px;
  margin-inline: auto;
  margin-bottom: 3.5rem;
}

.section-tag {
  color: var(--accent-gold);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  display: block;
  margin-bottom: 0.6rem;
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 3.8vw, 3.2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.reviews-marquee {
  width: 100%;
  overflow: hidden;
  position: relative;
  mask-image: linear-gradient(to right, transparent, black 12%, black 88%, transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, black 12%, black 88%, transparent);
}

.reviews-track {
  display: flex;
  gap: 1.5rem;
  width: max-content;
  animation: scroll-left 35s linear infinite;
}

.reviews-track:hover {
  animation-play-state: paused;
}

@keyframes scroll-left {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.review-card {
  width: 360px;
  padding: 1.8rem;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.review-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.review-stars {
  color: var(--accent-gold);
  font-size: 1rem;
  letter-spacing: 2px;
}

.review-badge {
  background: rgba(245, 188, 87, 0.12);
  color: var(--accent-gold);
  border: 1px solid rgba(245, 188, 87, 0.3);
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
}

.review-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-style: italic;
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.review-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-amber), var(--accent-indigo));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #fff;
  font-size: 0.85rem;
}

.review-info strong {
  display: block;
  font-size: 0.9rem;
  color: var(--text-primary);
}

.review-info span {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* FEATURES SHOWCASE (CHAPTERS) */
.features-section {
  padding: 100px 0;
  position: relative;
  z-index: 1;
}

.chapter-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  margin-bottom: 100px;
}

.chapter-grid.reverse {
  direction: rtl;
}

.chapter-grid.reverse > * {
  direction: ltr;
}

.chapter-num {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--accent-gold);
  margin-bottom: 0.8rem;
  display: block;
  letter-spacing: 0.1em;
}

.chapter-title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 3.2vw, 2.8rem);
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 1.2rem;
  letter-spacing: -0.02em;
}

.chapter-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-bottom: 1.8rem;
  line-height: 1.65;
}

.chapter-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.chapter-list li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.95rem;
  color: var(--text-primary);
}

.chapter-list li::before {
  content: "✓";
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(245, 188, 87, 0.15);
  color: var(--accent-gold);
  font-weight: 800;
  font-size: 0.75rem;
}

.chapter-media {
  position: relative;
  display: flex;
  justify-content: center;
}

.chapter-phone-frame {
  width: min(290px, 80vw);
  border-radius: 40px;
  padding: 6px;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.15), rgba(255, 255, 255, 0.02));
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.5);
  transition: var(--transition);
}

.chapter-phone-frame:hover {
  transform: translateY(-6px);
  border-color: var(--border-glass-bright);
}

.chapter-phone-frame img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 34px;
}

/* APPLE WATCH GALLERY */
.watch-gallery {
  width: min(430px, 88vw);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(0.8rem, 2vw, 1.25rem);
  align-items: end;
}

.watch-card {
  min-width: 0;
  margin: 0;
  text-align: center;
}

.watch-card-frame {
  padding: 0.45rem;
  border-radius: 30px;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.82), rgba(255, 255, 255, 0.16));
  border: 1px solid var(--border-glass-bright);
  box-shadow: 0 22px 48px rgba(15, 23, 42, 0.18), 0 0 26px var(--accent-glow);
  transition: var(--transition);
}

.watch-card-frame:hover {
  transform: translateY(-6px);
}

:root.dark-theme .watch-card-frame {
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.2), rgba(255, 255, 255, 0.03));
  box-shadow: 0 24px 52px rgba(0, 0, 0, 0.42), 0 0 28px var(--accent-glow);
}

.watch-card-frame img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 24px;
}

.watch-card figcaption {
  margin-top: 0.8rem;
  color: var(--text-secondary);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* IPAD SHOWCASE SECTION */
.ipad-section {
  padding: 100px 0;
  position: relative;
  z-index: 1;
}

.ipad-frame {
  position: relative;
  width: min(900px, 94vw);
  margin-inline: auto;
  border-radius: 28px;
  padding: 12px;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.15), rgba(255, 255, 255, 0.02));
  box-shadow: 0 35px 90px rgba(0, 0, 0, 0.6), 0 0 50px rgba(99, 102, 241, 0.15);
}

.ipad-frame img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 18px;
}

.ipad-gallery-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.8rem;
  margin-top: 2rem;
}

.gallery-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  cursor: pointer;
  transition: var(--transition);
  border: none;
}

.gallery-dot.active {
  width: 28px;
  border-radius: 999px;
  background: var(--accent-gold);
}

/* PRIVACY SECTION */
.privacy-section {
  padding: 90px 0;
  position: relative;
  z-index: 1;
}

.privacy-box {
  padding: 3.5rem;
  text-align: center;
  max-width: 850px;
  margin-inline: auto;
  position: relative;
  overflow: hidden;
}

.privacy-icon {
  width: 60px;
  height: 60px;
  border-radius: 18px;
  background: rgba(245, 188, 87, 0.1);
  color: var(--accent-gold);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.privacy-icon svg {
  width: 30px;
  height: 30px;
  fill: currentColor;
}

/* SOCIAL & ECOSYSTEM SECTION */
.social-section {
  padding: 90px 0;
  position: relative;
  z-index: 1;
}

.social-card {
  padding: 4rem 2rem;
  text-align: center;
  max-width: 850px;
  margin-inline: auto;
}

.social-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.2rem;
  flex-wrap: wrap;
  margin-top: 2.2rem;
}

.btn-social {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem 1.8rem;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.92rem;
  color: #fff;
  transition: var(--transition);
  border: 1px solid transparent;
}

.btn-social.x-btn {
  background: #000;
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-social.x-btn:hover {
  background: #111;
  transform: translateY(-2px);
  border-color: rgba(255, 255, 255, 0.4);
}

.btn-social.ig-btn {
  background: linear-gradient(45deg, #f09433 0%, #e6683c 25%, #dc2743 50%, #cc2366 75%, #bc1888 100%);
  box-shadow: 0 10px 25px rgba(220, 39, 67, 0.25);
}

.btn-social.ig-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 30px rgba(220, 39, 67, 0.4);
}

.btn-social svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

/* CROSS PROMOTION (VANGUARD APPS) */
.other-apps-section {
  padding: 90px 0;
  position: relative;
  z-index: 1;
}

.apps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
  margin-top: 3rem;
}

.app-promo-card {
  padding: 1.8rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  color: var(--text-primary);
  transition: var(--transition);
}

.app-promo-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-glass-bright);
}

.app-promo-icon {
  width: 76px;
  height: 76px;
  border-radius: 18px;
  margin-bottom: 1.2rem;
  box-shadow: 0 10px 25px rgba(0,0,0,0.4);
  object-fit: cover;
}

.app-promo-card h3 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  margin-bottom: 0.4rem;
}

.app-promo-card p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 1.5rem;
}

.app-card-buttons {
  display: flex;
  gap: 0.6rem;
  width: 100%;
  margin-top: auto;
  justify-content: center;
}

.btn-card-site {
  flex: 1;
  padding: 0.55rem 0.85rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-glass);
  color: var(--text-primary);
  text-decoration: none;
  font-size: 0.78rem;
  font-weight: 600;
  transition: var(--transition);
  text-align: center;
}

.btn-card-site:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--border-glass-bright);
}

.btn-card-store {
  flex: 1;
  padding: 0.55rem 0.85rem;
  border-radius: 999px;
  background: var(--accent-gold);
  color: #000;
  text-decoration: none;
  font-size: 0.78rem;
  font-weight: 700;
  transition: var(--transition);
  text-align: center;
}

.btn-card-store:hover {
  background: #ffffff;
  box-shadow: 0 6px 20px rgba(245, 188, 87, 0.3);
}

.btn-full-width {
  width: 100%;
}

/* FOOTER */
.footer {
  padding: 70px 0 30px;
  position: relative;
  z-index: 1;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 4rem;
}

.footer-brand h3 {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  margin-bottom: 0.8rem;
}

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

.footer-col h4 {
  font-family: var(--font-heading);
  font-size: 1rem;
  margin-bottom: 1.2rem;
  color: var(--text-primary);
}

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

.footer-links-list a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.88rem;
  transition: var(--transition);
}

.footer-links-list a:hover {
  color: var(--accent-gold);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--text-muted);
  font-size: 0.85rem;
  flex-wrap: wrap;
  gap: 1rem;
}

/* RESPONSIVE DESIGN */
@media (max-width: 992px) {
  .chapter-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
    text-align: center;
  }
  .chapter-grid.reverse {
    direction: ltr;
  }
  .chapter-list {
    align-items: center;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .promo-videos-section {
    padding: 68px 0 78px;
  }
  .promo-videos-header {
    margin-bottom: 2.25rem;
  }
  .promo-videos-grid {
    display: flex;
    justify-content: flex-start;
    gap: 1rem;
    width: calc(100% + 4vw);
    overflow-x: auto;
    padding: 0 4vw 1.25rem 0;
    scroll-snap-type: x mandatory;
    scroll-padding-inline: 0;
    scrollbar-width: none;
    overscroll-behavior-inline: contain;
  }
  .promo-videos-grid::-webkit-scrollbar {
    display: none;
  }
  .promo-video-card {
    flex: 0 0 min(82vw, 340px);
    scroll-snap-align: start;
  }
  .promo-video-frame {
    border-radius: 30px;
  }
  .promo-play-button {
    width: 64px;
    height: 64px;
  }
  .nav-links {
    display: none;
  }
  .nav-actions {
    display: none;
  }
  .mobile-toggle {
    display: block;
  }
  .mobile-menu-active .nav-links {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 76px;
    left: 0;
    right: 0;
    background: #f8fafc;
    padding: 2rem;
    border-bottom: 1px solid var(--border-glass);
    gap: 1.5rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
  }
  
  :root.dark-theme .mobile-menu-active .nav-links {
    background: rgba(7, 9, 14, 0.98);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  .privacy-box {
    padding: 2rem 1.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .promo-play-button,
  .promo-video-shade {
    transition: none;
  }
}