/* ==========================================================================
   Apple-Inspired Landing Page — Design System
   ========================================================================== */

/* --- Design Tokens --- */
:root {
  /* Colors */
  --color-bg-primary: #FFFFFF;
  --color-bg-secondary: #F5F5F7;
  --color-bg-accent: #E8E8ED;
  --color-text-primary: #1D1D1F;
  --color-text-secondary: #6E6E73;
  --color-black: #000000;
  --color-white: #FFFFFF;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1.0625rem;
  --font-size-lg: 1.25rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;
  --font-size-3xl: clamp(2.5rem, 5vw, 3.5rem);
  --font-size-4xl: clamp(3rem, 8vw, 6rem);
  --font-size-hero: clamp(2.75rem, 8vw, 5.5rem);
  --line-height-tight: 1.05;
  --line-height-normal: 1.47059;
  --letter-spacing-tight: -0.025em;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;
  --space-3xl: 10rem;

  /* Motion */
  --ease-premium: cubic-bezier(0.25, 0.1, 0.25, 1);
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --duration-fast: 0.2s;
  --duration-medium: 0.4s;
  --duration-slow: 0.8s;

  /* Layout */
  --container-max: 1200px;
  --nav-height: 52px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-pill: 980px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.12);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.06);
  --shadow-card-hover: 0 12px 40px rgba(0, 0, 0, 0.12);

  /* Sequence scroll distance */
  --sequence-scroll-length: 300%;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: auto; /* Lenis handles smooth scroll */
}

html.lenis,
html.lenis body {
  height: auto;
}

.lenis.lenis-smooth {
  scroll-behavior: auto !important;
}

.lenis.lenis-smooth [data-lenis-prevent] {
  overscroll-behavior: contain;
}

.lenis.lenis-stopped {
  overflow: hidden;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  overflow-x: hidden;
}

body.loading {
  overflow: hidden;
}

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

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

ul {
  list-style: none;
}

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

/* --- Accessibility --- */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-sm);
  z-index: 10000;
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-black);
  color: var(--color-white);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  transition: top var(--duration-fast);
}

.skip-link:focus {
  top: var(--space-sm);
}

:focus-visible {
  outline: 2px solid #0071e3;
  outline-offset: 3px;
}

/* --- Utility --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-md);
}

.section {
  content-visibility: auto;
  contain-intrinsic-size: auto 600px;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-size: var(--font-size-sm);
  font-weight: 400;
  border-radius: var(--radius-pill);
  transition: transform var(--duration-fast) var(--ease-premium),
              opacity var(--duration-fast) var(--ease-premium);
  will-change: transform;
}

.btn--primary {
  background: var(--color-text-primary);
  color: var(--color-white);
}

.btn--primary:hover {
  opacity: 0.85;
}

.btn--secondary {
  background: transparent;
  color: #0071e3;
  padding-inline: 0;
}

.btn--secondary:hover {
  text-decoration: underline;
}

.link-arrow::after {
  content: " ›";
  transition: transform var(--duration-fast) var(--ease-premium);
  display: inline-block;
}

.link-arrow:hover::after {
  transform: translateX(4px);
}

/* --- Page Loader --- */
.loader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-primary);
  transition: opacity var(--duration-slow) var(--ease-premium),
              visibility var(--duration-slow);
}

.loader.is-hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loader__inner {
  text-align: center;
  width: min(280px, 80vw);
}

.loader__brand {
  font-size: var(--font-size-xl);
  font-weight: 600;
  letter-spacing: var(--letter-spacing-tight);
  margin-bottom: var(--space-lg);
  color: var(--color-text-primary);
}

.loader__bar-track {
  width: 100%;
  height: 2px;
  background: var(--color-bg-accent);
  border-radius: var(--radius-pill);
  overflow: hidden;
}

.loader__bar {
  height: 100%;
  width: 0%;
  background: var(--color-text-primary);
  border-radius: var(--radius-pill);
  transition: width 0.15s var(--ease-premium);
  transform-origin: left center;
}

.loader__percent {
  margin-top: var(--space-sm);
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  font-variant-numeric: tabular-nums;
}

/* --- Scroll Progress --- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1001;
  height: 2px;
  pointer-events: none;
}

.scroll-progress__bar {
  height: 100%;
  width: 100%;
  background: var(--color-text-primary);
  transform: scaleX(0);
  transform-origin: left center;
  will-change: transform;
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 2px;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  transition: background var(--duration-medium) var(--ease-premium),
              backdrop-filter var(--duration-medium) var(--ease-premium),
              border-color var(--duration-medium) var(--ease-premium);
}

.nav.is-scrolled {
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-md);
  height: 100%;
}

.nav__logo {
  font-size: var(--font-size-lg);
  font-weight: 600;
  letter-spacing: var(--letter-spacing-tight);
  transition: opacity var(--duration-fast);
}

.nav__logo:hover {
  opacity: 0.7;
}

.nav__links {
  display: flex;
  gap: var(--space-lg);
}

.nav__link {
  font-size: var(--font-size-xs);
  color: var(--color-text-primary);
  opacity: 0.8;
  transition: opacity var(--duration-fast);
  position: relative;
}

.nav__link::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transition: transform var(--duration-fast) var(--ease-premium);
}

.nav__link:hover {
  opacity: 1;
}

.nav__link:hover::after {
  transform: scaleX(1);
}

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  padding: var(--space-xs);
  z-index: 1002;
}

.nav__toggle-bar {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--color-text-primary);
  transition: transform var(--duration-medium) var(--ease-premium),
              opacity var(--duration-medium);
}

.nav__toggle.is-active .nav__toggle-bar:first-child {
  transform: translateY(3.75px) rotate(45deg);
}

.nav__toggle.is-active .nav__toggle-bar:last-child {
  transform: translateY(-3.75px) rotate(-45deg);
}

/* --- Mobile Menu --- */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 999;
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--duration-medium) var(--ease-premium),
              visibility var(--duration-medium);
}

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

.mobile-menu__links {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
}

.mobile-menu__link {
  font-size: var(--font-size-2xl);
  font-weight: 600;
  letter-spacing: var(--letter-spacing-tight);
  transition: opacity var(--duration-fast);
}

.mobile-menu__link:hover {
  opacity: 0.6;
}

/* ==========================================================================
   SECTION 1: Hero
   ========================================================================== */
.hero {
  position: relative;
  background: var(--color-black);
}

.hero__pin {
  position: relative;
  width: 100%;
  height: 100vh;
  overflow: hidden;
  background: var(--color-black);
}

.hero__canvas-wrap {
  position: absolute;
  inset: 0;
  transform: translateZ(0);
  will-change: transform;
}

.hero__canvas-wrap canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.hero__canvas-wrap.canvas-wrap--contain,
.airpods__canvas-wrap.canvas-wrap--contain {
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero__canvas-wrap.canvas-wrap--contain canvas,
.airpods__canvas-wrap.canvas-wrap--contain canvas {
  width: auto !important;
  height: auto !important;
  max-width: 100%;
  max-height: 100%;
  position: relative;
}

.hero__copy--center {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  pointer-events: none;
  z-index: 2;
  padding-inline: var(--space-md);
}

.hero__side {
  position: absolute;
  top: 0;
  bottom: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  z-index: 2;
  pointer-events: none;
  max-width: min(280px, 28vw);
}

.hero__side--left {
  left: var(--space-xl);
}

.hero__side--right {
  right: var(--space-xl);
  align-items: flex-end;
}

.hero__info {
  position: absolute;
  opacity: 0;
  will-change: transform, opacity;
}

.hero__side--left .hero__info {
  left: 0;
  text-align: left;
}

.hero__side--right .hero__info {
  right: 0;
  text-align: right;
}

.hero__title {
  font-size: var(--font-size-hero);
  font-weight: 700;
  letter-spacing: var(--letter-spacing-tight);
  line-height: var(--line-height-tight);
  color: var(--color-white);
  text-shadow: 0 2px 24px rgba(0, 0, 0, 0.45);
  opacity: 0;
  transform: translateY(20px);
  will-change: transform, opacity;
}

.hero__tagline {
  margin-top: var(--space-sm);
  font-size: var(--font-size-xl);
  font-weight: 400;
  color: rgba(255, 255, 255, 0.85);
  text-shadow: 0 2px 16px rgba(0, 0, 0, 0.4);
  opacity: 0;
  transform: translateY(20px);
  will-change: transform, opacity;
}

.hero__info-label {
  font-size: var(--font-size-lg);
  font-weight: 600;
  letter-spacing: var(--letter-spacing-tight);
  color: var(--color-white);
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
  margin-bottom: var(--space-xs);
}

.hero__info-text {
  font-size: var(--font-size-sm);
  line-height: 1.5;
  color: rgba(255, 255, 255, 0.8);
  text-shadow: 0 2px 16px rgba(0, 0, 0, 0.45);
}

.hero__scroll-indicator {
  position: absolute;
  bottom: var(--space-lg);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
  color: rgba(255, 255, 255, 0.7);
  z-index: 2;
  opacity: 1;
  will-change: opacity;
}

.hero__scroll-text {
  font-size: var(--font-size-xs);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.hero__scroll-chevron {
  animation: bounce 2s var(--ease-premium) infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(6px); }
}

/* ==========================================================================
   SECTION 2: GDC Announcement
   ========================================================================== */
.gdc {
  position: relative;
  overflow: hidden;
  background: var(--color-black);
  padding-block: var(--space-3xl);
  color: var(--color-white);
}

.gdc__wave-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 1;
}

.gdc .container {
  position: relative;
  z-index: 1;
}

.gdc__layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: center;
}

.gdc__main {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-sm);
}

.gdc__badge {
  display: inline-block;
  padding: 0.35rem 0.85rem;
  font-size: var(--font-size-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-black);
  background: var(--color-white);
  border-radius: var(--radius-pill);
}

.gdc__eyebrow {
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.65);
  margin-top: var(--space-xs);
}

.gdc__heading {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  letter-spacing: var(--letter-spacing-tight);
  line-height: var(--line-height-tight);
  max-width: 14ch;
  color: var(--color-white);
  text-shadow: 0 2px 24px rgba(0, 0, 0, 0.6);
}

.gdc__date {
  font-size: var(--font-size-xl);
  font-weight: 500;
  color: rgba(255, 255, 255, 0.85);
  text-shadow: 0 1px 12px rgba(0, 0, 0, 0.5);
}

.gdc__link {
  font-size: var(--font-size-lg);
  color: #2997ff;
  margin-top: var(--space-sm);
}

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

.gdc__fact {
  display: flex;
  align-items: baseline;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.gdc__fact-value {
  font-size: var(--font-size-xl);
  font-weight: 700;
  letter-spacing: var(--letter-spacing-tight);
  color: var(--color-white);
  min-width: 3.5rem;
}

.gdc__fact-label {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.65);
  line-height: 1.4;
}

.gdc-anim,
.gdc-fact-anim,
.ent-anim {
  will-change: transform, opacity;
}

.gdc-anim {
  opacity: 0;
  transform: translateY(40px);
}

.gdc-fact-anim {
  opacity: 0;
  transform: translateX(48px);
}

@media (prefers-reduced-motion: reduce) {
  .gdc-anim,
  .gdc-fact-anim {
    opacity: 1;
    transform: none;
  }

  .gdc__wave-canvas {
    display: none;
  }
}

/* ==========================================================================
   SECTION 3 & 4: Product Showcases
   ========================================================================== */
.showcase {
  padding-block: var(--space-3xl);
  background: var(--color-bg-primary);
}

.showcase--17 {
  background: var(--color-bg-secondary);
}

.showcase__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: center;
}

.showcase__inner--reverse {
  direction: rtl;
}

.showcase__inner--reverse > * {
  direction: ltr;
}

.showcase__media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  will-change: transform;
}

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

.showcase__media--dark {
  background: var(--color-black);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
}

.showcase__media--dark img {
  border-radius: var(--radius-md);
}

.showcase__heading {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  letter-spacing: var(--letter-spacing-tight);
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-md);
}

.showcase__subheading {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  line-height: var(--line-height-normal);
  margin-bottom: var(--space-lg);
  max-width: 42ch;
}

/* ==========================================================================
   SECTION: Story Scroll Experience
   ========================================================================== */
.story-scroll {
  width: 100%;
  overflow-x: hidden;
}

.story-panel {
  position: relative;
  min-height: 100vh;
  width: 100%;
  overflow: hidden;
}

.story-panel__inner {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: var(--space-md);
  min-height: 100vh;
  padding: clamp(2rem, 8vw, 4rem) 4vw 4vw;
  transform-origin: bottom left;
  will-change: transform;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

.story-panel--light {
  background: var(--color-bg-secondary);
  color: var(--color-text-primary);
}

.story-panel--dark {
  background: var(--color-black);
  color: var(--color-white);
}

.story-panel--gray {
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
}

.story-panel--accent {
  background: var(--color-text-primary);
  color: var(--color-white);
}

.story-panel__eyebrow {
  font-size: var(--font-size-xs);
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.story-panel__rule {
  border: none;
  border-top: 1px solid currentColor;
  opacity: 0.35;
  margin: clamp(1rem, 2vw, 1.5rem) 0;
}

.story-panel__rule--light {
  opacity: 0.22;
}

.story-panel__title {
  font-size: clamp(2.75rem, 11vw, 7.5rem);
  font-weight: 700;
  line-height: 0.88;
  letter-spacing: var(--letter-spacing-tight);
  text-transform: uppercase;
}

.story-panel__lead {
  font-size: clamp(1rem, 2.2vw, 1.35rem);
  line-height: 1.55;
  max-width: 50ch;
  font-weight: 400;
}

.story-panel--dark .story-panel__lead,
.story-panel--accent .story-panel__lead {
  opacity: 0.78;
}

.story-panel__lead--right {
  margin-left: auto;
  text-align: right;
}

.story-panel__grid {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(1rem, 3vw, 2rem);
}

.story-panel__cell {
  flex: 1 1 180px;
  min-width: 160px;
}

.story-panel__cell-label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.35rem;
}

.story-panel__cell-text {
  font-size: clamp(0.85rem, 1.3vw, 1rem);
  line-height: 1.5;
  opacity: 0.72;
}

@media (max-width: 768px) {
  .story-panel__title {
    font-size: clamp(2.25rem, 14vw, 3.5rem);
  }

  .story-panel__inner {
    padding: 2rem 1.25rem 2.5rem;
    min-height: auto;
  }

  .story-panel {
    min-height: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .story-panel__inner {
    will-change: auto;
    transform: none !important;
  }
}

/* ==========================================================================
   SECTION: Q&A
   ========================================================================== */
.faq {
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
  padding-block: var(--space-3xl);
}

.faq__inner {
  display: grid;
  gap: var(--space-xl);
}

.faq__header {
  max-width: 640px;
}

.faq__eyebrow {
  font-size: var(--font-size-xs);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-sm);
}

.faq__heading {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  letter-spacing: var(--letter-spacing-tight);
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-sm);
}

.faq__intro {
  font-size: var(--font-size-lg);
  line-height: 1.5;
  color: var(--color-text-secondary);
  max-width: 48ch;
}

.faq__list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--color-bg-accent);
}

.faq__item {
  border-bottom: 1px solid var(--color-bg-accent);
}

.faq__question-wrap {
  margin: 0;
}

.faq__question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  width: 100%;
  padding-block: var(--space-md);
  text-align: left;
  font-size: clamp(1rem, 2vw, 1.25rem);
  font-weight: 600;
  line-height: 1.35;
  color: var(--color-text-primary);
  transition: color var(--duration-fast) var(--ease-premium);
}

.faq__question:hover {
  color: #0071e3;
}

.faq__question-text {
  flex: 1;
}

.faq__icon {
  position: relative;
  flex-shrink: 0;
  width: 1.25rem;
  height: 1.25rem;
}

.faq__icon::before,
.faq__icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0.75rem;
  height: 1.5px;
  background: currentColor;
  transform: translate(-50%, -50%);
  transition: transform var(--duration-medium) var(--ease-out-expo);
}

.faq__icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.faq__item.is-open .faq__icon::after {
  transform: translate(-50%, -50%) rotate(90deg) scaleX(0);
}

.faq__answer {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--duration-medium) var(--ease-out-expo);
}

.faq__item.is-open .faq__answer {
  grid-template-rows: 1fr;
}

.faq__answer[hidden] {
  display: none;
}

.faq__item.is-open .faq__answer[hidden] {
  display: grid;
}

.faq__answer-inner {
  overflow: hidden;
}

.faq__answer-inner p {
  padding-bottom: var(--space-md);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text-secondary);
  max-width: 72ch;
}

.faq-anim {
  will-change: transform, opacity;
  opacity: 0;
  transform: translateY(24px);
}

@media (prefers-reduced-motion: reduce) {
  .faq-anim {
    opacity: 1;
    transform: none;
  }

  .faq__answer {
    transition: none;
  }
}

@media (max-width: 768px) {
  .faq {
    padding-block: var(--space-2xl);
  }

  .faq__question {
    padding-block: 1.125rem;
  }
}

/* ==========================================================================
   SECTION 5: AirPods
   ========================================================================== */
.airpods {
  background: var(--color-black);
  color: var(--color-white);
}

.airpods__pin {
  position: relative;
  width: 100%;
  height: 100vh;
  overflow: hidden;
}

.airpods__canvas-wrap {
  position: absolute;
  inset: 0;
  transform: translateZ(0);
  will-change: transform;
}

.airpods__canvas-wrap canvas {
  display: block;
  width: 100%;
  height: 100%;
}

/* ==========================================================================
   SECTION: Text Reveal Scroll
   ========================================================================== */
.text-reveal {
  background: var(--color-bg-primary);
}

.text-reveal__area {
  height: 200vh;
  position: relative;
}

.text-reveal__sticky {
  position: sticky;
  top: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-md);
  gap: var(--space-md);
}

.text-reveal__eyebrow {
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-secondary);
}

.text-reveal__message {
  max-width: 52rem;
  margin: 0 auto;
  font-size: clamp(1.75rem, 4.5vw, 3.25rem);
  font-weight: 700;
  letter-spacing: var(--letter-spacing-tight);
  line-height: 1.25;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  text-align: center;
  gap: 0.15em 0.35em;
}

.text-reveal__word {
  position: relative;
  display: inline-block;
  white-space: nowrap;
}

.text-reveal__ghost {
  color: var(--color-text-primary);
  opacity: 0.18;
}

.text-reveal__fill {
  position: absolute;
  inset: 0;
  color: var(--color-text-primary);
  opacity: 0;
  will-change: opacity;
}

@media (max-width: 768px) {
  .text-reveal__area {
    height: 160vh;
  }

  .text-reveal__message {
    font-size: clamp(1.5rem, 6vw, 2rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .text-reveal__area {
    height: auto;
    min-height: 50vh;
  }

  .text-reveal__sticky {
    position: relative;
    height: auto;
    padding-block: var(--space-3xl);
  }

  .text-reveal__fill {
    opacity: 1;
    position: static;
  }

  .text-reveal__ghost {
    display: none;
  }
}

/* ==========================================================================
   Marquees — premium section dividers
   ========================================================================== */
.marquee {
  overflow: hidden;
  padding-block: 0.9rem;
  border-block: 1px solid rgba(0, 0, 0, 0.06);
  user-select: none;
  -webkit-user-select: none;
}

.marquee--light {
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
}

.marquee--gray {
  background: var(--color-bg-secondary);
  color: var(--color-text-primary);
}

.marquee--dark {
  background: var(--color-black);
  color: rgba(255, 255, 255, 0.88);
  border-color: rgba(255, 255, 255, 0.1);
}

.marquee__inner {
  overflow: hidden;
  -webkit-mask-image: linear-gradient(
    90deg,
    transparent,
    #000 6%,
    #000 94%,
    transparent
  );
  mask-image: linear-gradient(
    90deg,
    transparent,
    #000 6%,
    #000 94%,
    transparent
  );
}

.marquee__track {
  display: flex;
  width: max-content;
  animation: marquee-scroll var(--marquee-duration, 38s) linear infinite;
  will-change: transform;
}

.marquee--reverse .marquee__track {
  animation-direction: reverse;
}

.marquee__group {
  display: flex;
  align-items: center;
  gap: 2.75rem;
  padding-right: 2.75rem;
  flex-shrink: 0;
}

.marquee__item {
  font-size: var(--font-size-xs);
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  white-space: nowrap;
}

.marquee__dot {
  opacity: 0.35;
  font-size: 0.45rem;
  line-height: 1;
}

@keyframes marquee-scroll {
  from {
    transform: translate3d(0, 0, 0);
  }
  to {
    transform: translate3d(-50%, 0, 0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .marquee__track {
    animation: none;
    flex-wrap: wrap;
    justify-content: center;
    width: 100%;
    gap: 0.5rem 1.5rem;
    padding: 0.5rem 1rem;
  }

  .marquee__group {
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem 1.5rem;
    padding-right: 0;
  }

  .marquee__inner {
    mask-image: none;
    -webkit-mask-image: none;
  }
}

@media (max-width: 768px) {
  .marquee {
    padding-block: 0.75rem;
  }

  .marquee__group {
    gap: 2rem;
    padding-right: 2rem;
  }

  .marquee__item {
    letter-spacing: 0.1em;
  }
}

/* ==========================================================================
   SECTION 6: Product Grid
   ========================================================================== */
.grid-section {
  padding-block: var(--space-3xl);
  background: var(--color-bg-primary);
}

.grid-section__heading {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  letter-spacing: var(--letter-spacing-tight);
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

.product-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform var(--duration-medium) var(--ease-out-expo),
              box-shadow var(--duration-medium) var(--ease-out-expo);
  will-change: transform;
  cursor: pointer;
}

.product-card[data-bg="light"] {
  background: var(--color-bg-primary);
}

.product-card[data-bg="gray"] {
  background: var(--color-bg-secondary);
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-card-hover);
}

.product-card__image {
  aspect-ratio: 3 / 2;
  overflow: hidden;
}

.product-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-slow) var(--ease-out-expo);
}

.product-card:hover .product-card__image img {
  transform: scale(1.03);
}

.product-card__body {
  padding: var(--space-md) var(--space-lg) var(--space-lg);
}

.product-card__label {
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-secondary);
}

.product-card__title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  letter-spacing: var(--letter-spacing-tight);
  margin-top: var(--space-xs);
}

.product-card__desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-top: var(--space-xs);
  line-height: 1.5;
}

/* ==========================================================================
   SECTION 7: Ecosystem
   ========================================================================== */
.ecosystem {
  padding-block: var(--space-3xl);
  background: var(--color-bg-primary);
  text-align: center;
}

.ecosystem__heading {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  letter-spacing: var(--letter-spacing-tight);
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-md);
}

.ecosystem__subheading {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  max-width: 50ch;
  margin-inline: auto;
  margin-bottom: var(--space-2xl);
}

.ecosystem__devices {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  gap: var(--space-xl);
  flex-wrap: wrap;
  margin-bottom: var(--space-lg);
}

.ecosystem__device {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
}

.ecosystem__device-icon {
  width: 100px;
  height: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-secondary);
  border-radius: 50%;
  transition: transform var(--duration-medium) var(--ease-out-expo);
}

.ecosystem__device:hover .ecosystem__device-icon {
  transform: scale(1.08);
}

.ecosystem__device-icon img {
  width: 56px;
  height: 56px;
  object-fit: contain;
}

.ecosystem__device-label {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
}

.ecosystem__connector {
  max-width: 400px;
  margin-inline: auto;
  opacity: 0.5;
}

.ecosystem__connector svg {
  width: 100%;
  height: auto;
}

/* ==========================================================================
   SECTION 8: Entertainment
   ========================================================================== */
.entertainment {
  background: var(--color-black);
  color: var(--color-white);
  padding-top: var(--space-3xl);
  padding-bottom: var(--space-xl);
  overflow: hidden;
  isolation: isolate;
}

.entertainment__header {
  text-align: center;
  margin-bottom: var(--space-2xl);
  position: relative;
  z-index: 2;
}

.entertainment__heading {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  letter-spacing: var(--letter-spacing-tight);
  margin-bottom: var(--space-sm);
}

.entertainment__subheading {
  font-size: var(--font-size-lg);
  color: rgba(255, 255, 255, 0.6);
}

.entertainment__stage {
  position: relative;
  overflow: hidden;
  width: 100%;
}

.entertainment__pin {
  height: 85vh;
  min-height: 480px;
  display: flex;
  align-items: center;
  overflow: hidden;
  width: 100%;
}

.entertainment__track {
  display: flex;
  flex-wrap: nowrap;
  gap: var(--space-lg);
  padding-inline: var(--space-md);
  padding-block: var(--space-sm);
  will-change: transform;
  width: max-content;
}

.ent-card {
  position: relative;
  flex: 0 0 auto;
  width: clamp(260px, 32vw, 380px);
  aspect-ratio: 3 / 4;
  border-radius: var(--radius-lg);
  overflow: hidden;
  opacity: 0;
}

.ent-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-slow) var(--ease-out-expo);
}

.ent-card:hover img {
  transform: scale(1.05);
}

.ent-card__overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--space-lg);
  background: linear-gradient(to top, rgba(0, 0, 0, 0.7) 0%, transparent 60%);
}

.ent-card__label {
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.7);
}

.ent-card__title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  letter-spacing: var(--letter-spacing-tight);
  margin-top: var(--space-xs);
}

/* ==========================================================================
   SECTION 9: Final CTA
   ========================================================================== */
.cta {
  padding-block: var(--space-3xl);
  background: var(--color-bg-primary);
  text-align: center;
}

.cta__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
}

.cta__heading {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  letter-spacing: var(--letter-spacing-tight);
  line-height: var(--line-height-tight);
}

.cta__subheading {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  max-width: 40ch;
}

/* ==========================================================================
   SECTION 10: Footer
   ========================================================================== */
.footer {
  background: var(--color-bg-secondary);
  padding-block: var(--space-2xl);
}

.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  text-align: center;
}

.footer__nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-md) var(--space-lg);
}

.footer__link {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  position: relative;
  transition: color var(--duration-fast);
}

.footer__link::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--color-text-primary);
  transform: scaleX(0);
  transition: transform var(--duration-fast) var(--ease-premium);
}

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

.footer__link:hover::after {
  transform: scaleX(1);
}

.footer__credit {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-primary);
}

.footer__disclaimer {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  max-width: 60ch;
  line-height: 1.6;
}

/* --- Reveal animation initial states (GSAP will animate) --- */
.reveal,
.reveal-left,
.reveal-right {
  will-change: transform, opacity;
}

/* --- Scroll margin for anchor nav --- */
section[id] {
  scroll-margin-top: var(--nav-height);
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 1024px) {
  .showcase__inner {
    gap: var(--space-xl);
  }

  .ecosystem__devices {
    gap: var(--space-lg);
  }
}

@media (max-width: 768px) {
  :root {
    --space-3xl: 6rem;
    --sequence-scroll-length: 200%;
  }

  .nav__links {
    display: none;
  }

  .nav__toggle {
    display: flex;
  }

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

  .gdc__main {
    align-items: center;
    text-align: center;
  }

  .gdc__heading {
    max-width: none;
  }

  .showcase__inner,
  .showcase__inner--reverse {
    grid-template-columns: 1fr;
    direction: ltr;
  }

  .showcase__content {
    order: -1;
  }

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

  .ecosystem__devices {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
  }

  .hero__copy {
    padding-top: calc(var(--nav-height) + var(--space-xl));
  }

  .hero__side {
    max-width: min(220px, 38vw);
  }

  .hero__side--left {
    left: var(--space-sm);
  }

  .hero__side--right {
    right: var(--space-sm);
  }

  .hero__info-label {
    font-size: var(--font-size-base);
  }

  .hero__info-text {
    font-size: var(--font-size-xs);
  }

  .hero__canvas-wrap,
  .airpods__canvas-wrap {
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .entertainment__pin {
    height: auto;
    min-height: 0;
    overflow: visible;
  }

  .entertainment__track {
    flex-direction: column;
    width: 100%;
    padding-inline: var(--space-md);
    padding-bottom: var(--space-xl);
    gap: var(--space-md);
  }

  .ent-card {
    width: 100%;
    max-width: 100%;
    opacity: 1;
  }
}

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

  .hero__scroll-chevron {
    animation: none;
  }

  .product-card:hover {
    transform: none;
  }
}