/* ============================================================
   DESIGN SYSTEM — AppCraft Studio
   Apple-inspired minimal dark/light with ambient color
   ============================================================ */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* ============================================================
   CSS CUSTOM PROPERTIES — LIGHT THEME
   ============================================================ */
:root {
  /* Backgrounds */
  --bg:           #f5f5f7;
  --bg-surface:   #ffffff;
  --bg-elevated:  #ffffff;
  --bg-nav:       rgba(245,245,247,0.85);

  /* Text */
  --text-primary:   #1d1d1f;
  --text-secondary: #6e6e73;
  --text-tertiary:  #aeaeb2;

  /* Borders */
  --border:       rgba(0,0,0,0.08);
  --border-strong: rgba(0,0,0,0.14);

  /* Glass */
  --glass-bg:     rgba(255,255,255,0.72);
  --glass-border: rgba(255,255,255,0.5);

  /* Shadows */
  --shadow-sm:  0 1px 3px rgba(0,0,0,0.07), 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md:  0 4px 16px rgba(0,0,0,0.08), 0 2px 4px rgba(0,0,0,0.04);
  --shadow-lg:  0 12px 40px rgba(0,0,0,0.10), 0 4px 12px rgba(0,0,0,0.06);
  --shadow-xl:  0 24px 64px rgba(0,0,0,0.12), 0 8px 24px rgba(0,0,0,0.06);

  /* Platform Colors */
  --color-ios:     #007AFF;
  --color-macos:   #007AFF;
  --color-android: #34A853;
  --color-windows: #8764B8;

  /* System Colors */
  --accent:        #007AFF;
  --success:       #34C759;
  --warning:       #FF9F0A;
  --error:         #FF3B30;

  /* Spacing Scale */
  --space-1:  4px;
  --space-2:  8px;
  --space-3:  12px;
  --space-4:  16px;
  --space-5:  20px;
  --space-6:  24px;
  --space-8:  32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;
  --space-24: 96px;

  /* Radii */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-2xl:36px;
  --radius-full: 9999px;

  /* Transitions */
  --ease-out:   cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-spring:cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-in-out:cubic-bezier(0.45, 0, 0.55, 1);
  --duration-fast: 150ms;
  --duration-base: 250ms;
  --duration-slow: 400ms;
  --duration-page: 600ms;

  /* Nav */
  --nav-height: 60px;

  /* Max widths */
  --max-width: 1200px;
  --max-width-text: 680px;
}

/* ============================================================
   DARK THEME
   ============================================================ */
[data-theme="dark"] {
  --bg:           #000000;
  --bg-surface:   #1c1c1e;
  --bg-elevated:  #2c2c2e;
  --bg-nav:       rgba(0,0,0,0.82);

  --text-primary:   #f5f5f7;
  --text-secondary: #86868b;
  --text-tertiary:  #48484a;

  --border:       rgba(255,255,255,0.08);
  --border-strong: rgba(255,255,255,0.14);

  --glass-bg:     rgba(28,28,30,0.82);
  --glass-border: rgba(255,255,255,0.10);

  --shadow-sm:  0 1px 3px rgba(0,0,0,0.4),  0 1px 2px rgba(0,0,0,0.3);
  --shadow-md:  0 4px 16px rgba(0,0,0,0.5), 0 2px 4px rgba(0,0,0,0.3);
  --shadow-lg:  0 12px 40px rgba(0,0,0,0.6), 0 4px 12px rgba(0,0,0,0.4);
  --shadow-xl:  0 24px 64px rgba(0,0,0,0.7), 0 8px 24px rgba(0,0,0,0.5);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background-color: var(--bg);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  transition: background-color var(--duration-slow) var(--ease-out),
              color var(--duration-slow) var(--ease-out);
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

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

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

ul, ol {
  list-style: none;
}

/* ============================================================
   PAGE TRANSITIONS
   ============================================================ */
.page-wrapper {
  animation: pageEnter var(--duration-page) var(--ease-out) both;
}

@keyframes pageEnter {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.page-exit {
  animation: pageExit 280ms var(--ease-in-out) both !important;
  pointer-events: none;
}

@keyframes pageExit {
  to {
    opacity: 0;
    transform: translateY(-12px) scale(0.98);
  }
}

/* Scroll-triggered animation base */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--duration-slow) var(--ease-out),
              transform var(--duration-slow) var(--ease-out);
}

.animate-on-scroll.in-view {
  opacity: 1;
  transform: translateY(0);
}

.animate-on-scroll.delay-1 { transition-delay: 80ms;  }
.animate-on-scroll.delay-2 { transition-delay: 160ms; }
.animate-on-scroll.delay-3 { transition-delay: 240ms; }
.animate-on-scroll.delay-4 { transition-delay: 320ms; }
.animate-on-scroll.delay-5 { transition-delay: 400ms; }
.animate-on-scroll.delay-6 { transition-delay: 480ms; }

/* ============================================================
   TYPOGRAPHY
   ============================================================ */
.text-hero {
  font-size: clamp(52px, 8vw, 88px);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.05;
}

.text-display {
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.text-headline {
  font-size: clamp(24px, 3.5vw, 36px);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.2;
}

.text-title {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.25;
}

.text-body-lg {
  font-size: 19px;
  font-weight: 400;
  line-height: 1.65;
}

.text-body {
  font-size: 17px;
  font-weight: 400;
  line-height: 1.65;
}

.text-caption {
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0.01em;
  line-height: 1.4;
}

.text-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

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

/* ============================================================
   LAYOUT
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.container-sm {
  max-width: var(--max-width-text);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.section {
  padding: var(--space-24) 0;
}

.section-sm {
  padding: var(--space-16) 0;
}

/* ============================================================
   NAVIGATION
   ============================================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  background: var(--bg-nav);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border);
  transition: background-color var(--duration-slow) var(--ease-out),
              border-color var(--duration-slow) var(--ease-out);
}

.nav__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
  height: 100%;
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  transition: opacity var(--duration-fast);
  flex-shrink: 0;
}

.nav__logo:hover { opacity: 0.7; }

.nav__logo-mark {
  width: 28px;
  height: 28px;
  background: linear-gradient(135deg, var(--accent) 0%, #5E5CE6 100%);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  box-shadow: 0 2px 8px rgba(0,122,255,0.3);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  margin-left: auto;
}

.nav__link {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  transition: color var(--duration-fast), background-color var(--duration-fast);
}

.nav__link:hover,
.nav__link.active {
  color: var(--text-primary);
  background: var(--bg-elevated);
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.nav__theme-toggle {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  background: transparent;
  transition: color var(--duration-fast), background-color var(--duration-fast);
  font-size: 16px;
}

.nav__theme-toggle:hover {
  color: var(--text-primary);
  background: var(--bg-elevated);
}

.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 34px;
  height: 34px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: transparent;
  transition: background-color var(--duration-fast);
  cursor: pointer;
}

.nav__hamburger:hover { background: var(--bg-elevated); }

.nav__hamburger span {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--duration-base) var(--ease-out),
              opacity var(--duration-base);
}

.nav--menu-open .nav__hamburger span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}
.nav--menu-open .nav__hamburger span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.nav--menu-open .nav__hamburger span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* Mobile Menu */
.nav__mobile-menu {
  position: fixed;
  inset: 0;
  top: var(--nav-height);
  background: var(--glass-bg);
  backdrop-filter: blur(40px) saturate(200%);
  -webkit-backdrop-filter: blur(40px) saturate(200%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  z-index: 999;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-base) var(--ease-out);
}

.nav__mobile-menu.open {
  opacity: 1;
  pointer-events: all;
}

.nav__mobile-link {
  font-size: 28px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  transition: opacity var(--duration-fast);
}

.nav__mobile-link:hover { opacity: 0.5; }

/* Spacer to push content below nav */
.nav-spacer { height: var(--nav-height); }

/* ============================================================
   HERO SECTION
   ============================================================ */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  padding: var(--nav-height) var(--space-6) var(--space-16);
}

/* Animated mesh gradient background */
.hero__gradient {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}

.hero__gradient::before,
.hero__gradient::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.45;
  animation: gradientFloat 12s ease-in-out infinite alternate;
}

.hero__gradient::before {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0,122,255,0.6) 0%, transparent 70%);
  top: -20%;
  left: -10%;
  animation-duration: 14s;
}

.hero__gradient::after {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(94,92,230,0.5) 0%, transparent 70%);
  bottom: -10%;
  right: -5%;
  animation-duration: 10s;
  animation-direction: alternate-reverse;
}

.hero__gradient-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.3;
  animation: gradientFloat 16s ease-in-out infinite alternate;
}

.hero__gradient-blob--green {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(52,168,83,0.6) 0%, transparent 70%);
  top: 30%;
  right: 20%;
  animation-delay: -4s;
}

.hero__gradient-blob--orange {
  width: 350px;
  height: 350px;
  background: radial-gradient(circle, rgba(255,107,53,0.4) 0%, transparent 70%);
  bottom: 20%;
  left: 15%;
  animation-delay: -8s;
  animation-duration: 18s;
}

[data-theme="dark"] .hero__gradient::before { opacity: 0.25; }
[data-theme="dark"] .hero__gradient::after  { opacity: 0.20; }
[data-theme="dark"] .hero__gradient-blob    { opacity: 0.18; }

@keyframes gradientFloat {
  0%   { transform: translate(0, 0) scale(1); }
  33%  { transform: translate(30px, -20px) scale(1.05); }
  66%  { transform: translate(-20px, 30px) scale(0.95); }
  100% { transform: translate(20px, -10px) scale(1.03); }
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 900px;
  margin: 0 auto;
}

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: var(--space-6);
  padding: var(--space-2) var(--space-4);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  backdrop-filter: blur(10px);
  animation: fadeSlideUp 0.8s var(--ease-out) 0.1s both;
}

.hero__eyebrow-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.5; transform: scale(1.4); }
}

.hero__title {
  margin-bottom: var(--space-6);
  animation: fadeSlideUp 0.8s var(--ease-out) 0.2s both;
}

.hero__title-gradient {
  background: linear-gradient(135deg,
    var(--text-primary) 0%,
    var(--text-secondary) 100%
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

[data-theme="dark"] .hero__title-gradient {
  background: linear-gradient(135deg, #ffffff 0%, #86868b 100%);
  -webkit-background-clip: text;
  background-clip: text;
}

.hero__subtitle {
  font-size: clamp(17px, 2.5vw, 22px);
  color: var(--text-secondary);
  max-width: 620px;
  margin: 0 auto var(--space-10);
  animation: fadeSlideUp 0.8s var(--ease-out) 0.3s both;
  line-height: 1.55;
}

.hero__platforms {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-10);
  animation: fadeSlideUp 0.8s var(--ease-out) 0.4s both;
}

.hero__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-3);
  animation: fadeSlideUp 0.8s var(--ease-out) 0.5s both;
}

@keyframes fadeSlideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero__scroll {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  color: var(--text-tertiary);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  animation: fadeSlideUp 1s var(--ease-out) 0.9s both;
}

.hero__scroll-line {
  width: 1px;
  height: 32px;
  background: linear-gradient(to bottom, transparent, var(--text-tertiary));
  animation: scrollBounce 2s ease-in-out infinite;
}

@keyframes scrollBounce {
  0%, 100% { transform: scaleY(1); opacity: 0.5; }
  50%       { transform: scaleY(0.6); opacity: 1; }
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  height: 44px;
  padding: 0 var(--space-6);
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-full);
  transition: transform var(--duration-fast) var(--ease-spring),
              box-shadow var(--duration-base) var(--ease-out),
              background-color var(--duration-base),
              opacity var(--duration-fast);
  cursor: pointer;
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.btn:hover  { transform: translateY(-1px); }
.btn:active { transform: translateY(0) scale(0.98); }

.btn-primary {
  background: var(--text-primary);
  color: var(--bg);
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: var(--bg-elevated);
  color: var(--text-primary);
  border: 1px solid var(--border-strong);
}

.btn-secondary:hover {
  background: var(--bg-surface);
  box-shadow: var(--shadow-sm);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  background: var(--bg-surface);
  color: var(--text-primary);
}

.btn-platform {
  height: 40px;
  padding: 0 var(--space-5);
  font-size: 14px;
  border-radius: var(--radius-full);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(10px);
  color: var(--text-primary);
}

.btn-sm {
  height: 34px;
  padding: 0 var(--space-4);
  font-size: 13px;
}

.btn-lg {
  height: 52px;
  padding: 0 var(--space-8);
  font-size: 17px;
}

/* ============================================================
   PLATFORM BADGES
   ============================================================ */
.platform-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 5px 12px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.platform-badge--ios {
  background: rgba(0,122,255,0.1);
  color: var(--color-ios);
  border: 1px solid rgba(0,122,255,0.2);
}

.platform-badge--macos {
  background: rgba(0,122,255,0.08);
  color: var(--color-macos);
  border: 1px solid rgba(0,122,255,0.15);
}

.platform-badge--android {
  background: rgba(52,168,83,0.1);
  color: var(--color-android);
  border: 1px solid rgba(52,168,83,0.2);
}

.platform-badge--windows {
  background: rgba(135,100,184,0.1);
  color: var(--color-windows);
  border: 1px solid rgba(135,100,184,0.2);
}

.platform-badge svg,
.platform-badge .badge-icon {
  width: 12px;
  height: 12px;
}

.platform-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 0;
  vertical-align: middle;
  color: currentColor;
}

.platform-icon svg {
  display: block;
  width: 100%;
  height: 100%;
  fill: currentColor;
}

.platform-icon--xs {
  width: 12px;
  height: 12px;
}

.platform-icon--sm {
  width: 14px;
  height: 14px;
}

.platform-icon--md {
  width: 18px;
  height: 18px;
}

.platform-icon--lg {
  width: 36px;
  height: 36px;
}

/* ============================================================
   APP CARDS
   ============================================================ */
.app-card {
  position: relative;
  background: var(--bg-surface);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: transform var(--duration-base) var(--ease-spring),
              box-shadow var(--duration-base) var(--ease-out),
              border-color var(--duration-base);
  cursor: pointer;
  display: flex;
  flex-direction: column;
}

.app-card:hover {
  transform: translateY(-4px) scale(1.005);
  box-shadow: var(--shadow-xl);
  border-color: var(--border-strong);
}

.app-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  opacity: 0;
  transition: opacity var(--duration-base);
  pointer-events: none;
  /* Ambient glow injected via JS as --app-color */
  box-shadow: inset 0 0 60px 0 color-mix(in srgb, var(--app-color, transparent) 15%, transparent);
}

.app-card:hover::before {
  opacity: 1;
}

.app-card__header {
  padding: var(--space-6);
  padding-bottom: var(--space-4);
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
}

.app-card__icon {
  width: 64px;
  height: 64px;
  border-radius: 18px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 16px var(--app-shadow, rgba(0,0,0,0.15));
}

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

.app-card__meta {
  flex: 1;
  min-width: 0;
}

.app-card__name {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.app-card__category {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
}

.app-card__platforms {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.app-card__body {
  padding: 0 var(--space-6) var(--space-6);
  flex: 1;
}

.app-card__desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.55;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: var(--space-4);
}

.app-card__footer {
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.app-card__cta {
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 4px;
  transition: gap var(--duration-fast);
}

.app-card:hover .app-card__cta {
  gap: 8px;
}

/* ============================================================
   APPS GRID
   ============================================================ */
.apps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-5);
}

.apps-grid--featured {
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: var(--space-6);
}

/* ============================================================
   FILTER TABS
   ============================================================ */
.filter-tabs {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.filter-tab {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: all var(--duration-fast);
}

.filter-tab:hover {
  color: var(--text-primary);
  border-color: var(--border-strong);
}

.filter-tab.active {
  background: var(--text-primary);
  color: var(--bg);
  border-color: var(--text-primary);
}

/* ============================================================
   STATS SECTION
   ============================================================ */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

.stat-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  text-align: center;
  transition: transform var(--duration-base) var(--ease-spring),
              box-shadow var(--duration-base);
}

.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.stat-number {
  font-size: 48px;
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-2);
}

.stat-label {
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 500;
}

/* ============================================================
   PLATFORM SECTIONS (INDEX)
   ============================================================ */
.platform-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
}

.platform-section--reverse {
  direction: rtl;
}

.platform-section--reverse > * {
  direction: ltr;
}

.platform-visual {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  aspect-ratio: 4/3;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

.platform-visual__mockup {
  font-size: 80px;
  opacity: 0.8;
}

/* ============================================================
   APP DETAIL PAGE
   ============================================================ */
.app-hero {
  padding: calc(var(--nav-height) + var(--space-16)) var(--space-6) var(--space-16);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.app-hero__glow {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 400px;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.2;
  pointer-events: none;
}

[data-theme="dark"] .app-hero__glow {
  opacity: 0.15;
}

.app-hero__icon {
  width: 120px;
  height: 120px;
  border-radius: 28px;
  margin: 0 auto var(--space-6);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 52px;
  box-shadow: var(--shadow-xl);
  position: relative;
  overflow: hidden;
}

.app-hero__icon-img,
.privacy-header__icon-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.app-hero__name {
  font-size: clamp(40px, 6vw, 64px);
  font-weight: 800;
  letter-spacing: -0.04em;
  margin-bottom: var(--space-3);
}

.app-hero__tagline {
  font-size: 22px;
  color: var(--text-secondary);
  margin-bottom: var(--space-6);
  font-weight: 400;
}

.app-hero__platforms {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-8);
}

.app-hero__actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-3);
}

/* Screenshots */
.screenshots-section {
  overflow: hidden;
  padding: var(--space-6) 0;
}

.screenshots-track {
  display: flex;
  gap: var(--space-4);
  overflow-x: auto;
  padding: var(--space-4) var(--space-6);
  scrollbar-width: none;
  -ms-overflow-style: none;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.screenshots-track::-webkit-scrollbar {
  display: none;
}

.screenshot-item {
  flex-shrink: 0;
  scroll-snap-align: start;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  width: 240px;
  height: 480px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--duration-base) var(--ease-spring),
              box-shadow var(--duration-base);
}

.screenshot-item:hover {
  transform: scale(1.03);
  box-shadow: var(--shadow-xl);
}

.screenshot-item__label {
  font-size: 15px;
  font-weight: 600;
  color: rgba(255,255,255,0.9);
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-4);
}

.feature-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: transform var(--duration-base) var(--ease-spring),
              box-shadow var(--duration-base);
}

.feature-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.feature-card__icon {
  font-size: 28px;
  margin-bottom: var(--space-3);
  display: block;
}

.feature-card__title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: var(--space-2);
  letter-spacing: -0.015em;
}

.feature-card__desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* Requirements */
.requirements-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--space-3);
}

.requirement-item {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.requirement-item__icon {
  font-size: 22px;
}

.requirement-item__info { flex: 1; }

.requirement-item__platform {
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 2px;
}

.requirement-item__version {
  font-size: 12px;
  color: var(--text-secondary);
}

/* Download buttons */
.download-btn {
  display: inline-flex;
  align-items: center;
  transition: transform var(--duration-base) var(--ease-out), filter var(--duration-base) var(--ease-out);
}

.download-btn:hover {
  transform: translateY(-2px);
  filter: drop-shadow(0 10px 24px rgba(15, 23, 42, 0.18));
}

.download-btn__badge {
  display: block;
  height: 56px;
  width: auto;
  border-radius: 12px;
}

@media (max-width: 640px) {
  .download-btn__badge {
    height: 48px;
  }
}

/* ============================================================
   PRIVACY POLICY PAGE
   ============================================================ */
.privacy-header {
  padding: calc(var(--nav-height) + var(--space-12)) var(--space-6) var(--space-10);
  border-bottom: 1px solid var(--border);
}

.privacy-header__app {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.privacy-header__icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  overflow: hidden;
}

.privacy-content {
  max-width: 720px;
  margin: 0 auto;
  padding: var(--space-12) var(--space-6);
}

.privacy-section {
  margin-bottom: var(--space-10);
  padding-bottom: var(--space-10);
  border-bottom: 1px solid var(--border);
}

.privacy-section:last-child {
  border-bottom: none;
}

.privacy-section__title {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
}

.privacy-section__content {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.privacy-data-list {
  margin-top: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.privacy-data-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: 14px;
  color: var(--text-secondary);
}

.privacy-data-item::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--text-tertiary);
  flex-shrink: 0;
}

/* ============================================================
   SECTION HEADERS
   ============================================================ */
.section-header {
  text-align: center;
  margin-bottom: var(--space-12);
}

.section-header__eyebrow {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-3);
  display: block;
}

.section-header__title {
  margin-bottom: var(--space-4);
}

.section-header__subtitle {
  font-size: 19px;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.55;
}

/* ============================================================
   DIVIDER
   ============================================================ */
.divider {
  height: 1px;
  background: var(--border);
  margin: 0;
}

/* ============================================================
   GLASS CARD
   ============================================================ */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
}

/* ============================================================
   ABOUT PAGE
   ============================================================ */
.about-hero {
  padding: calc(var(--nav-height) + var(--space-20)) var(--space-6) var(--space-20);
  text-align: center;
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--space-5);
}

.team-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  text-align: center;
  transition: transform var(--duration-base) var(--ease-spring),
              box-shadow var(--duration-base);
}

.team-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.team-card__avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  margin: 0 auto var(--space-4);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
}

/* ============================================================
   404 PAGE
   ============================================================ */
.error-page {
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-12) var(--space-6);
}

.error-page__code {
  font-size: 120px;
  font-weight: 800;
  letter-spacing: -0.06em;
  line-height: 1;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-tertiary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-4);
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  padding: var(--space-16) 0 var(--space-8);
  border-top: 1px solid var(--border);
  margin-top: auto;
}

.footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.footer__top {
  display: grid;
  grid-template-columns: 1fr repeat(3, auto);
  gap: var(--space-12);
  margin-bottom: var(--space-10);
  padding-bottom: var(--space-10);
  border-bottom: 1px solid var(--border);
}

.footer__brand {
  max-width: 300px;
}

.footer__logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-3);
}

.footer__desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.footer__col-title {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: var(--space-4);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer__link {
  font-size: 14px;
  color: var(--text-secondary);
  transition: color var(--duration-fast);
}

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

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer__copyright {
  font-size: 13px;
  color: var(--text-tertiary);
}

.footer__legal-links {
  display: flex;
  gap: var(--space-5);
}

.footer__legal-link {
  font-size: 13px;
  color: var(--text-tertiary);
  transition: color var(--duration-fast);
}

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

/* ============================================================
   BREADCRUMBS
   ============================================================ */
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 14px;
  color: var(--text-secondary);
  flex-wrap: wrap;
}

.breadcrumbs a {
  color: var(--text-secondary);
  transition: color var(--duration-fast);
}

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

.breadcrumbs__sep {
  color: var(--text-tertiary);
}

.breadcrumbs__current {
  color: var(--text-primary);
  font-weight: 500;
}

/* ============================================================
   LOADING STATE
   ============================================================ */
.skeleton {
  background: linear-gradient(90deg,
    var(--bg-elevated) 25%,
    var(--border) 50%,
    var(--bg-elevated) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}

@keyframes shimmer {
  from { background-position: 200% 0; }
  to   { background-position: -200% 0; }
}

/* ============================================================
   UTILITY CLASSES
   ============================================================ */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.flex-wrap { flex-wrap: wrap; }
.text-center { text-align: center; }
.w-full { width: 100%; }
.hidden { display: none !important; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .footer__top {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }

  .platform-section {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .platform-section--reverse {
    direction: ltr;
  }

  .stats-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --nav-height: 56px;
  }

  .nav__links { display: none; }
  .nav__hamburger { display: flex; }

  .container {
    padding: 0 var(--space-4);
  }

  .section {
    padding: var(--space-16) 0;
  }

  .apps-grid,
  .apps-grid--featured {
    grid-template-columns: 1fr;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .stats-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-3);
  }

  .stat-number {
    font-size: 36px;
  }

  .footer__top {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
  }

  .footer__brand {
    grid-column: 1 / -1;
    max-width: 100%;
  }

  .footer__bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .app-hero__icon {
    width: 96px;
    height: 96px;
    border-radius: 22px;
    font-size: 40px;
  }

  .screenshot-item {
    width: 180px;
    height: 360px;
  }

  .requirements-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 480px) {
  .hero__platforms {
    gap: var(--space-2);
  }

  .stats-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .footer__top {
    grid-template-columns: 1fr;
  }

  .requirements-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================================
   REDUCED MOTION
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }

  .animate-on-scroll {
    opacity: 1;
    transform: none;
  }
}