/* ============================================
   Delta Executor — Mobile-First Design System
   ============================================ */

/* --- Google Font --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap');

/* --- Design Tokens --- */
:root {
  /* Colors — Dark Theme */
  --bg-primary: #0f1923;
  --bg-secondary: #1a2332;
  --bg-tertiary: #243447;
  --bg-card: rgba(26, 35, 50, 0.85);
  --bg-glass: rgba(26, 35, 50, 0.6);

  --text-primary: #e8edf2;
  --text-secondary: #8b9bb4;
  --text-muted: #5a6a7e;

  --accent-cyan: #00d4ff;
  --accent-cyan-hover: #33ddff;
  --accent-cyan-glow: rgba(0, 212, 255, 0.25);
  --accent-green: #4cdf8b;
  --accent-gold: #ffb800;
  --accent-purple: #a855f7;
  --accent-red: #ef4444;

  --border-subtle: rgba(139, 155, 180, 0.12);
  --border-accent: rgba(0, 212, 255, 0.3);

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --fs-xs: 0.6875rem;    /* 11px */
  --fs-sm: 0.75rem;      /* 12px */
  --fs-base: 0.875rem;   /* 14px */
  --fs-md: 1rem;         /* 16px */
  --fs-lg: 1.125rem;     /* 18px */
  --fs-xl: 1.25rem;      /* 20px */
  --fs-2xl: 1.5rem;      /* 24px */
  --fs-3xl: 1.75rem;     /* 28px */
  --fs-4xl: 2rem;        /* 32px */

  --fw-regular: 400;
  --fw-medium: 500;
  --fw-semibold: 600;
  --fw-bold: 700;
  --fw-extrabold: 800;

  --lh-tight: 1.2;
  --lh-base: 1.5;
  --lh-relaxed: 1.7;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 0.75rem;
  --space-base: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  /* Borders */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-full: 100px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px var(--accent-cyan-glow);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;

  /* Layout */
  --header-height: 56px;
  --topbar-height: 36px;
  --download-bar-height: 72px;
  --max-width: 720px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: calc(var(--header-height) + var(--topbar-height) + 16px);
}

body {
  font-family: var(--font-family);
  font-size: var(--fs-base);
  line-height: var(--lh-base);
  color: var(--text-primary);
  background: var(--bg-primary);
  background: linear-gradient(180deg, var(--bg-primary) 0%, #111d2b 50%, var(--bg-primary) 100%);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  padding-bottom: var(--download-bar-height);
}

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

a:hover {
  color: var(--accent-cyan-hover);
}

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

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

/* --- Utility --- */
.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;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-base);
}

/* ==================
   TOP BAR (Platform Nav)
   ================== */
.topbar {
  background: rgba(15, 25, 35, 0.95);
  border-bottom: 1px solid var(--border-subtle);
  height: var(--topbar-height);
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  position: sticky;
  top: 0;
  z-index: 1000;
}

.topbar::-webkit-scrollbar {
  display: none;
}

.topbar__list {
  display: flex;
  align-items: center;
  height: 100%;
  gap: var(--space-sm);
  padding: 0 var(--space-base);
  white-space: nowrap;
  
  width: 100%;
  max-width: var(--max-width);
  min-width: max-content;
  margin: 0 auto;
}

.topbar__item {
  display: flex;
  align-items: center;
}

.topbar__link {
  color: var(--text-secondary);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.topbar__link:hover,
.topbar__link--active {
  color: var(--accent-cyan);
  background: var(--accent-cyan-glow);
}

.topbar__logo {
  width: 20px;
  height: 20px;
  margin-right: var(--space-xs);
}

/* ==================
   MAIN HEADER
   ================== */
.site-header {
  background: rgba(15, 25, 35, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  height: var(--header-height);
  border-bottom: 1px solid var(--border-subtle);
  position: sticky;
  top: var(--topbar-height);
  z-index: 999;
  transition: all var(--transition-base);
}

.site-header.scrolled {
  height: 48px;
  box-shadow: var(--shadow-md);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-base);
}

.site-header__brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.site-header__title {
  font-size: var(--fs-lg);
  font-weight: var(--fw-bold);
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

/* Hamburger */
.hamburger {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 8px;
  width: 36px;
  height: 36px;
  justify-content: center;
  align-items: center;
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
}

.hamburger:hover {
  background: var(--bg-tertiary);
}

.hamburger__line {
  width: 18px;
  height: 2px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.hamburger.active .hamburger__line:nth-child(1) {
  transform: rotate(45deg) translate(4px, 4px);
}

.hamburger.active .hamburger__line:nth-child(2) {
  opacity: 0;
}

.hamburger.active .hamburger__line:nth-child(3) {
  transform: rotate(-45deg) translate(4px, -4px);
}

/* Icon buttons */
.icon-btn {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: all var(--transition-fast);
  color: var(--text-secondary);
}

.icon-btn:hover {
  background: var(--bg-tertiary);
  color: var(--accent-cyan);
}

.icon-btn svg {
  width: 20px;
  height: 20px;
}

/* Mobile menu */
.mobile-menu {
  position: fixed;
  top: calc(var(--topbar-height) + var(--header-height));
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(15, 25, 35, 0.98);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  z-index: 998;
  padding: var(--space-xl);
  transform: translateX(-100%);
  transition: transform var(--transition-base);
  overflow-y: auto;
}

.mobile-menu.open {
  transform: translateX(0);
}

.mobile-menu__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.mobile-menu__link {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-base);
  color: var(--text-secondary);
  font-size: var(--fs-md);
  font-weight: var(--fw-medium);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.mobile-menu__link:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.mobile-menu__link svg {
  width: 20px;
  height: 20px;
  opacity: 0.6;
}

/* ==================
   BREADCRUMB
   ================== */
.breadcrumb {
  padding: var(--space-md) 0;
}

.breadcrumb__list {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  flex-wrap: wrap;
}

.breadcrumb__item {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.breadcrumb__item::after {
  content: '/';
  color: var(--text-muted);
  font-size: var(--fs-sm);
  margin-left: var(--space-xs);
}

.breadcrumb__item:last-child::after {
  display: none;
}

.breadcrumb__link {
  color: var(--text-muted);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.breadcrumb__link:hover {
  color: var(--text-secondary);
}

.breadcrumb__link--current {
  color: var(--text-primary);
  font-weight: var(--fw-semibold);
}

/* ==================
   HERO (App Card)
   ================== */
.hero {
  padding: calc(var(--space-lg) / 2) 0 calc(var(--space-xl) / 2);
}

.hero__card {
  display: flex;
  gap: var(--space-lg);
  align-items: flex-start;
}

.hero__icon-wrapper {
  flex-shrink: 0;
}

.hero__icon {
  width: 100px;
  height: 100px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--bg-tertiary), var(--bg-secondary));
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  box-shadow: var(--shadow-md), 0 0 30px rgba(0, 212, 255, 0.08);
  transition: box-shadow var(--transition-base);
}

.hero__icon:hover {
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.hero__icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* CSS App Icon Fallback */
.hero__icon-svg {
  width: 60px;
  height: 60px;
  fill: var(--accent-cyan);
  opacity: 0.9;
}

.hero__info {
  flex: 1;
  min-width: 0;
}

.hero__heading {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  margin: 0;
  padding: 0;
  font-weight: normal;
}

.hero__title {
  font-size: var(--fs-3xl);
  font-weight: var(--fw-extrabold);
  line-height: var(--lh-tight);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-xs);
}

.hero__version {
  font-size: var(--fs-base);
  color: var(--text-muted);
  font-weight: var(--fw-medium);
  margin-bottom: var(--space-md);
}

.hero__cta-link {
  display: inline-block;
  font-size: var(--fs-base);
  font-weight: var(--fw-semibold);
  color: var(--accent-cyan);
  margin-bottom: var(--space-md);
  transition: all var(--transition-fast);
}

.hero__cta-link:hover {
  color: var(--accent-cyan-hover);
  text-shadow: 0 0 12px var(--accent-cyan-glow);
}

.hero__badges {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: calc(var(--space-xs) / 2) calc(var(--space-sm));
  font-size: 0.55rem;
  font-weight: var(--fw-bold);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-radius: var(--radius-full);
  border: 1px solid;
}

.badge--official {
  color: var(--accent-green);
  border-color: rgba(76, 223, 139, 0.3);
  background: rgba(76, 223, 139, 0.08);
}

.badge--rank {
  color: var(--accent-purple);
  border-color: rgba(168, 85, 247, 0.3);
  background: rgba(168, 85, 247, 0.08);
}

.badge--free {
  color: var(--accent-gold);
  border-color: rgba(255, 184, 0, 0.3);
  background: rgba(255, 184, 0, 0.08);
}

/* ==================
   TRUST STRIP
   ================== */
.trust-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  padding: calc(var(--space-lg) / 2) 0;
  margin-bottom: calc(var(--space-xl) / 2);
}

.trust-strip__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
}

.trust-strip__item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: 0;
  top: 20%;
  height: 60%;
  width: 1px;
  background: var(--border-subtle);
}

.trust-strip__icon {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  margin-bottom: var(--space-xs);
}

.trust-strip__icon svg {
  width: 24px;
  height: 24px;
}

.trust-strip__value {
  font-size: var(--fs-xl);
  font-weight: var(--fw-bold);
  line-height: var(--lh-tight);
}

.trust-strip__label {
  font-size: var(--fs-xs);
  color: var(--text-muted);
  font-weight: var(--fw-medium);
}

.star-icon {
  color: var(--accent-gold);
}

.security-icon {
  color: var(--accent-green);
}

/* ==================
   CONTENT SECTIONS
   ================== */
.content-section {
  margin-bottom: calc(var(--space-2xl) / 2);
}

.content-section__heading {
  font-size: var(--fs-lg);
  font-weight: var(--fw-bold);
  margin-bottom: var(--space-base);
  line-height: var(--lh-tight);
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.content-section p {
  color: var(--text-secondary);
  line-height: var(--lh-relaxed);
  margin-bottom: var(--space-base);
}

.content-section p:last-child {
  margin-bottom: 0;
}

/* Headline (main tagline) */
.headline {
  font-size: var(--fs-xl);
  font-weight: var(--fw-bold);
  line-height: var(--lh-tight);
  letter-spacing: -0.02em;
  margin-bottom: calc(var(--space-xl) / 2);
  color: var(--text-primary);
}

/* ==================
   FEATURES LIST
   ================== */
.features-list {
  display: grid;
  gap: var(--space-md);
}

.feature-item {
  display: flex;
  gap: var(--space-md);
  padding: var(--space-base);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.feature-item:hover {
  border-color: var(--border-accent);
  background: rgba(26, 35, 50, 0.95);
}

.feature-item__icon {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--accent-cyan-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
}

.feature-item__icon svg {
  width: 18px;
  height: 18px;
}

.feature-item__title {
  font-size: var(--fs-base);
  font-weight: var(--fw-semibold);
  margin-bottom: var(--space-xs);
}

.feature-item__desc {
  font-size: var(--fs-sm);
  color: var(--text-muted);
  line-height: var(--lh-base);
}

/* ==================
   INSTALL STEPS
   ================== */
.install-steps {
  counter-reset: step;
}

.install-step {
  display: flex;
  gap: var(--space-base);
  padding: calc(var(--space-base) / 2) 0;
  border-bottom: 1px solid var(--border-subtle);
}

.install-step:last-child {
  border-bottom: none;
}

.install-step__number {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-cyan), #0099cc);
  color: var(--bg-primary);
  font-size: var(--fs-base);
  font-weight: var(--fw-bold);
  display: flex;
  align-items: center;
  justify-content: center;
  counter-increment: step;
}

.install-step__content {
  flex: 1;
}

.install-step__title {
  font-size: var(--fs-base);
  font-weight: var(--fw-semibold);
  margin-bottom: var(--space-xs);
}

.install-step__desc {
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  line-height: var(--lh-base);
}

/* ==================
   PLATFORMS GRID
   ================== */
.platforms-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

.platform-card {
  padding: var(--space-base);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  text-align: center;
  transition: all var(--transition-fast);
}

.platform-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.platform-card__icon {
  font-size: var(--fs-2xl);
  margin-bottom: var(--space-sm);
}

.platform-card__name {
  font-size: var(--fs-base);
  font-weight: var(--fw-semibold);
  margin-bottom: var(--space-xs);
}

.platform-card__req {
  font-size: var(--fs-xs);
  color: var(--text-muted);
}

/* ==================
   GAMES COMPATIBILITY
   ================== */
.games-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.game-tag {
  padding: var(--space-xs) var(--space-md);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  font-weight: var(--fw-medium);
  transition: all var(--transition-fast);
}

.game-tag:hover {
  border-color: var(--border-accent);
  color: var(--accent-cyan);
}

/* ==================
   SAFETY SECTION
   ================== */
.safety-list {
  display: grid;
  gap: var(--space-md);
}

.safety-item {
  display: flex;
  gap: var(--space-md);
  align-items: flex-start;
}

.safety-item__icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  color: var(--accent-green);
  margin-top: 2px;
}

.safety-item__icon svg {
  width: 24px;
  height: 24px;
}

.safety-item__text {
  font-size: var(--fs-base);
  color: var(--text-secondary);
  line-height: var(--lh-base);
}

.safety-item__text strong {
  color: var(--text-primary);
  font-weight: var(--fw-semibold);
}

/* ==================
   DEVELOPER INFO
   ================== */
.developer-card {
  display: flex;
  gap: var(--space-base);
  padding: var(--space-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  align-items: center;
}

.developer-card__avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--bg-tertiary), var(--accent-cyan-glow));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--fs-lg);
  font-weight: var(--fw-bold);
  color: var(--accent-cyan);
  flex-shrink: 0;
}

.developer-card__name {
  font-size: var(--fs-base);
  font-weight: var(--fw-semibold);
}

.developer-card__role {
  font-size: var(--fs-sm);
  color: var(--text-muted);
}

/* ==================
   SPECS TABLE
   ================== */
.specs-table {
  width: 100%;
  border-collapse: collapse;
}

.specs-table tr {
  border-bottom: 1px solid var(--border-subtle);
}

.specs-table tr:last-child {
  border-bottom: none;
}

.specs-table th,
.specs-table td {
  padding: var(--space-md) 0;
  text-align: left;
  font-size: var(--fs-sm);
}

.specs-table th {
  color: var(--text-muted);
  font-weight: var(--fw-medium);
  width: 40%;
}

.specs-table td {
  color: var(--text-secondary);
  font-weight: var(--fw-medium);
}

/* ==================
   FAQ ACCORDION
   ================== */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.faq-item {
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item:hover {
  border-color: var(--border-accent);
}

.faq-item.open {
  border-color: var(--border-accent);
}

.faq-item__question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--space-base) var(--space-lg);
  font-size: var(--fs-base);
  font-weight: var(--fw-semibold);
  color: var(--text-primary);
  text-align: left;
  background: var(--bg-card);
  transition: background var(--transition-fast);
  gap: var(--space-base);
}

.faq-item__question:hover {
  background: rgba(26, 35, 50, 0.95);
}

.faq-item__chevron {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  color: var(--text-muted);
  transition: transform var(--transition-base);
}

.faq-item.open .faq-item__chevron {
  transform: rotate(180deg);
  color: var(--accent-cyan);
}

.faq-item__answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow) ease;
}

.faq-item__answer-inner {
  padding: 0 var(--space-lg) var(--space-lg);
  font-size: var(--fs-base);
  color: var(--text-secondary);
  line-height: var(--lh-relaxed);
}

/* ==================
   STICKY DOWNLOAD BAR
   ================== */
.download-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--download-bar-height);
  background: linear-gradient(180deg, rgba(15, 25, 35, 0.95) 0%, rgba(10, 18, 26, 0.99) 100%);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-top: 1px solid var(--border-subtle);
  z-index: 997;
  display: flex;
  align-items: center;
}

.download-bar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-base);
}

.download-bar__info {
  flex: 1;
}

.download-bar__title {
  font-size: var(--fs-md);
  font-weight: var(--fw-bold);
  color: var(--accent-cyan);
  line-height: var(--lh-tight);
}

.download-bar__meta {
  display: flex;
  gap: var(--space-sm);
  align-items: center;
  font-size: var(--fs-xs);
  color: var(--text-muted);
}

.download-bar__version {
  color: var(--accent-cyan);
  font-weight: var(--fw-semibold);
}

.download-bar__btn {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-cyan), #0099cc);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--bg-primary);
  transition: all var(--transition-fast);
  box-shadow: 0 0 16px var(--accent-cyan-glow);
  animation: pulse-glow 2.5s ease-in-out infinite;
}

.download-bar__btn:hover {
  transform: scale(1.08);
  box-shadow: 0 0 28px rgba(0, 212, 255, 0.45);
}

.download-bar__btn svg {
  width: 22px;
  height: 22px;
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 16px var(--accent-cyan-glow); }
  50% { box-shadow: 0 0 28px rgba(0, 212, 255, 0.4); }
}

/* ==================
   FOOTER
   ================== */
.site-footer {
  border-top: 1px solid var(--border-subtle);
  padding: calc(var(--space-2xl) / 2) 0;
  margin-top: calc(var(--space-2xl) / 2);
}

.site-footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-base);
  justify-content: center;
  margin-bottom: var(--space-lg);
}

.site-footer__link {
  font-size: var(--fs-sm);
  color: var(--text-muted);
  font-weight: var(--fw-medium);
  transition: color var(--transition-fast);
}

.site-footer__link:hover {
  color: var(--text-secondary);
}

.site-footer__copy {
  text-align: center;
  font-size: var(--fs-xs);
  color: var(--text-muted);
  line-height: var(--lh-relaxed);
}

.site-footer address {
  font-style: normal;
  text-align: center;
  font-size: var(--fs-xs);
  color: var(--text-muted);
  margin-top: var(--space-sm);
}

.site-footer address a {
  color: var(--text-muted);
}

.site-footer address a:hover {
  color: var(--accent-cyan);
}

/* ==================
   RESPONSIVE: 768px+
   ================== */
@media (min-width: 768px) {
  :root {
    --fs-3xl: 2rem;
    --fs-4xl: 2.5rem;
  }

  .hero__icon {
    width: 120px;
    height: 120px;
  }

  .hero__title {
    font-size: var(--fs-4xl);
  }

  .platforms-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .features-list {
    grid-template-columns: repeat(2, 1fr);
  }

  .headline {
    font-size: var(--fs-2xl);
    margin-bottom: var(--space-xl);
  }

  .download-bar__title {
    font-size: var(--fs-lg);
  }

  /* Restore full vertical spacing for tablet/desktop */
  .hero {
    padding: var(--space-lg) 0 var(--space-xl);
  }

  .trust-strip {
    padding: var(--space-lg) 0;
    margin-bottom: var(--space-xl);
  }

  .content-section {
    margin-bottom: var(--space-2xl);
  }

  .install-step {
    padding: var(--space-base) 0;
  }

  .site-footer {
    padding: var(--space-2xl) 0;
    margin-top: var(--space-2xl);
  }
}

/* ==================
   RESPONSIVE: 1024px+
   ================== */
@media (min-width: 1024px) {
  .hamburger {
    display: none;
  }

  .container,
  .site-header__inner,
  .topbar__list {
    padding: 0 var(--space-xl);
  }

  .content-section {
    margin-bottom: var(--space-3xl);
  }
}

/* ==================
   ANIMATIONS
   ================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-in {
  animation: fadeInUp 0.5s ease forwards;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}