/* ==========================================================================
   MATTEBLACK STUDIOS — Design System
   Premium matte-black · sovereign · art-directed · mobile-first
   ==========================================================================
 *
 * Architecture: base styles target mobile viewports. Progressive enhancement
 * uses only CSS width breakpoints at 768px and 1024px — no JS breakpoints,
 * no user-agent sniffing, no device detection.
 *
 * RECOMMENDED HOST-LEVEL SECURITY HEADERS (configure on your static host):
 *
 *   Content-Security-Policy:
 *     default-src 'none'; script-src 'self'; style-src 'self'; img-src 'self';
 *     font-src 'self'; connect-src 'none'; frame-ancestors 'none'; base-uri 'self';
 *     form-action 'none'; upgrade-insecure-requests
 *
 *   X-Frame-Options: DENY
 *     (redundant when frame-ancestors 'none' is set in CSP)
 *
 *   X-Content-Type-Options: nosniff
 *   Referrer-Policy: no-referrer
 *   Permissions-Policy: accelerometer=(), camera=(), geolocation=(), gyroscope=(),
 *     microphone=(), payment=(), usb=()
 *
 * ========================================================================== */

/* --------------------------------------------------------------------------
   Design Tokens
   -------------------------------------------------------------------------- */
:root {
  color-scheme: dark;

  /* Layered matte blacks — depth scale (950 → 600) */
  --black-950: #080808;
  --black-900: #0c0c0c;
  --black-850: #111111;
  --black-800: #161616;
  --black-750: #1c1c1c;
  --black-700: #222222;
  --black-650: #282828;
  --black-600: #303030;

  /* Semantic surfaces */
  --color-bg-base: var(--black-950);
  --color-bg-canvas: var(--black-900);
  --color-bg-raised: var(--black-850);
  --color-bg-surface: var(--black-800);
  --color-bg-elevated: var(--black-750);
  --color-bg-overlay: var(--black-700);
  --color-bg-muted: var(--black-650);
  --color-bg-hover: var(--black-600);

  /* Borders — luminance steps for elevation */
  --border-ghost: rgba(255, 255, 255, 0.035);
  --border-subtle: rgba(255, 255, 255, 0.065);
  --border-default: rgba(255, 255, 255, 0.1);
  --border-strong: rgba(255, 255, 255, 0.14);
  --border-highlight: rgba(255, 255, 255, 0.2);

  --color-border-subtle: var(--border-subtle);
  --color-border-default: var(--border-default);
  --color-border-strong: var(--border-strong);

  /* Text — WCAG AA on matte-black surfaces */
  --color-text-primary: #f5f5f5;
  --color-text-secondary: rgba(245, 245, 245, 0.88);
  --color-text-muted: rgba(245, 245, 245, 0.76);
  --color-text-inverse: var(--black-950);
  --color-accent: #d4d4d4;
  --color-accent-hover: #ffffff;
  --color-focus-ring: rgba(255, 255, 255, 0.92);
  --color-focus-glow: rgba(255, 255, 255, 0.14);

  /* Chrome & interactive overlays */
  --surface-chrome: rgba(12, 12, 12, 0.52);
  --surface-chrome-border: var(--border-ghost);
  --surface-interactive: rgba(34, 34, 34, 0.7);
  --surface-interactive-hover: rgba(48, 48, 48, 0.82);

  /* Brand gradients & depth */
  --gradient-brand: linear-gradient(165deg, rgba(255, 255, 255, 0.045) 0%, transparent 52%);
  --gradient-surface: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.035) 0%,
    rgba(255, 255, 255, 0.008) 42%,
    transparent 100%
  );
  --gradient-surface-deep: linear-gradient(
    180deg,
    transparent 0%,
    rgba(8, 8, 8, 0.35) 100%
  );
  --gradient-vignette: radial-gradient(
    ellipse 82% 68% at 50% 42%,
    transparent 38%,
    rgba(8, 8, 8, 0.5) 100%
  );
  --gradient-hero-glow: radial-gradient(
    ellipse 62% 42% at 50% 28%,
    rgba(255, 255, 255, 0.055) 0%,
    transparent 72%
  );

  /* Spacing scale — 4px base unit, mobile-first rhythm */
  --space-4: 0.25rem;   /*  4px */
  --space-8: 0.5rem;    /*  8px */
  --space-12: 0.75rem;  /* 12px */
  --space-16: 1rem;     /* 16px */
  --space-24: 1.5rem;   /* 24px */
  --space-32: 2rem;     /* 32px */
  --space-48: 3rem;     /* 48px */
  --space-64: 4rem;     /* 64px */

  /* Typography — mobile base sizes; desktop overrides at 768px+ */
  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Segoe UI", system-ui, sans-serif;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;

  --text-body: clamp(1.0625rem, 2.5vw, 1.125rem);
  --line-height-body: 1.5;
  --baseline: calc(var(--text-body) * var(--line-height-body));

  --text-display: clamp(1.875rem, 6vw, 2.5rem);
  --text-h1: clamp(1.625rem, 5vw, 2.25rem);
  --text-h2: clamp(1.25rem, 4vw, 1.625rem);
  --text-h3: clamp(1.0625rem, 3.5vw, 1.25rem);
  --text-body-lg: clamp(1.0625rem, 1rem + 0.3vw, 1.1875rem);
  --text-small: clamp(0.8125rem, 0.78rem + 0.18vw, 0.875rem);
  --text-label: clamp(0.75rem, 0.72rem + 0.15vw, 0.8125rem);
  --text-caption: clamp(0.6875rem, 0.66rem + 0.14vw, 0.75rem);

  --leading-display: 1.1;
  --leading-heading: 1.2;
  --leading-subheading: 1.3;
  --leading-body: 1.5;
  --leading-prose: 1.65;
  --leading-label: 1.4;

  --tracking-display: -0.035em;
  --tracking-heading: -0.025em;
  --tracking-subheading: -0.015em;
  --tracking-body: 0;
  --tracking-label: 0.06em;
  --tracking-caps: 0.1em;

  /* Vertical rhythm — baseline multiples */
  --rhythm-1: var(--baseline);
  --rhythm-2: calc(var(--baseline) * 2);
  --rhythm-3: calc(var(--baseline) * 3);
  --rhythm-4: calc(var(--baseline) * 4);

  /* Layout — mobile defaults; widened at breakpoints */
  --grid-columns: 12;
  --container-max: 72rem;
  --container-narrow: 42rem;
  --hero-max-width: 50rem;
  --container-padding: var(--space-16);
  --section-padding: var(--space-32);
  --header-height: 4rem;

  /* Radii — unified */
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;

  /* Motion — micro-interactions */
  --ease-premium: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-soft: cubic-bezier(0.33, 1, 0.68, 1);
  --duration-micro: 150ms;
  --duration-base: 200ms;
  --duration-enter: 250ms;
  --page-fade-duration: 280ms;
  --page-fade-delay: 60ms;
  --page-fade-delay-header: 50ms;
  --page-fade-delay-main: 110ms;
  --page-fade-delay-footer: 170ms;
  --lift-hover: -3px;
  --lift-sm: -2px;
  --lift-xs: -1px;
  --press-sm: 1px;
  --transition-interactive:
    transform var(--duration-micro) var(--ease-premium),
    opacity var(--duration-base) var(--ease-soft),
    color var(--duration-base) var(--ease-soft),
    background var(--duration-base) var(--ease-soft),
    border-color var(--duration-base) var(--ease-soft),
    box-shadow var(--duration-base) var(--ease-soft);

  /* Shadows — stacked matte depth */
  --shadow-sm:
    0 1px 2px rgba(0, 0, 0, 0.42),
    inset 0 1px 0 var(--border-ghost);
  --shadow-md:
    0 6px 20px rgba(0, 0, 0, 0.48),
    0 1px 0 var(--border-ghost);
  --shadow-lg:
    0 14px 36px rgba(0, 0, 0, 0.52),
    inset 0 1px 0 var(--border-subtle);
  --shadow-inset-deep: inset 0 1px 0 var(--border-subtle), inset 0 -1px 0 rgba(0, 0, 0, 0.35);

  /* Frosted glass — mapped to black layers */
  --glass-bg: rgba(22, 22, 22, 0.58);
  --glass-bg-strong: rgba(28, 28, 28, 0.68);
  --glass-border: var(--border-default);
  --glass-border-soft: var(--border-subtle);
  --glass-blur: 20px;
  --glass-text: #f5f5f5;
  --glass-text-soft: rgba(255, 255, 255, 0.92);
  --glass-highlight: var(--border-highlight);

  --bg-image: url("assets/hero-bg.png");
  --bg-scrim: linear-gradient(
    180deg,
    rgba(8, 8, 8, 0.52) 0%,
    rgba(8, 8, 8, 0.66) 48%,
    rgba(8, 8, 8, 0.76) 100%
  );
  --parallax-depth: -1px;
  --parallax-scale: 1.12;

  /* Ambient background motion */
  --ambient-duration: 96s;
  --ambient-duration-glow: 72s;
  --ambient-ease: ease-in-out;
}

/* --------------------------------------------------------------------------
   Reset & Base
   Instagram in-app browser hardening: overflow-x hidden, min-width/height 0
   on all elements prevents flex/grid children from forcing horizontal scroll.
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  min-width: 0;
  min-height: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

html,
body {
  overflow-x: hidden;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}

body {
  position: relative;
  min-height: 100dvh;
  min-height: -webkit-fill-available;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  overflow-wrap: break-word;
  word-wrap: break-word;
  background-color: var(--black-950);
  background-image: var(--bg-scrim), var(--bg-image);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  background-attachment: scroll;
  image-rendering: auto;
  color: var(--color-text-primary);
  font-family: var(--font-sans);
  font-size: var(--text-body);
  font-weight: var(--font-weight-regular);
  line-height: var(--leading-body);
  font-feature-settings: "kern" 1, "liga" 1;
}

/* Skip link — visible on keyboard focus */
.skip-link {
  position: absolute;
  top: var(--space-8);
  left: var(--space-16);
  z-index: 200;
  padding: var(--space-8) var(--space-16);
  font-size: var(--text-small);
  font-weight: var(--font-weight-medium);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--color-text-primary);
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  overflow: hidden;
  white-space: nowrap;
}

.skip-link:focus {
  clip: auto;
  clip-path: none;
  overflow: visible;
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 3px;
  box-shadow: var(--shadow-md), 0 0 0 4px var(--color-focus-glow);
}

.skip-link:focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 3px;
  box-shadow: var(--shadow-md), 0 0 0 4px var(--color-focus-glow);
}

/* Ambient drift on pages with a full-page background image */
@media (prefers-reduced-motion: no-preference) {
  body:not(:has(.hero__parallax)) {
    animation: ambient-bg-drift var(--ambient-duration) var(--ambient-ease) infinite alternate;
  }
}

@keyframes ambient-bg-drift {
  0%,
  100% {
    background-position: 50% 50%;
  }
  33% {
    background-position: 50.4% 49.6%;
  }
  66% {
    background-position: 49.6% 50.4%;
  }
}

@keyframes ambient-glow {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.88;
  }
}

/* Home hero owns the background image when parallax layer is present */
body:has(.hero__parallax) {
  background-image: var(--bg-scrim);
}

/* --------------------------------------------------------------------------
   Page transitions — CSS-only opacity fades (motion-safe)
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: no-preference) {
  @view-transition {
    navigation: auto;
  }

  ::view-transition-old(root) {
    animation: page-exit var(--page-fade-duration) var(--ease-soft) both;
    will-change: opacity;
  }

  ::view-transition-new(root) {
    animation: page-enter var(--page-fade-duration) var(--ease-premium) both;
    animation-delay: var(--page-fade-delay);
    will-change: opacity;
  }
}

@keyframes page-enter {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes page-exit {
  from {
    opacity: 1;
  }
  to {
    opacity: 0;
  }
}

/* Staggered enter on load — opacity + transition-delay */
@media (prefers-reduced-motion: no-preference) {
  @starting-style {
    .header,
    main:not(.legal),
    .footer {
      opacity: 0;
    }
  }

  .header,
  main:not(.legal),
  .footer {
    transition: opacity var(--page-fade-duration) var(--ease-premium);
    will-change: opacity;
  }

  main.legal,
  main.legal .legal__content {
    opacity: 1;
    transition: none;
    will-change: auto;
  }

  .header {
    transition-delay: var(--page-fade-delay-header);
  }

  main {
    transition-delay: var(--page-fade-delay-main);
  }

  .footer {
    transition-delay: var(--page-fade-delay-footer);
  }
}

.header,
main,
.footer {
  opacity: 1;
}

/* --------------------------------------------------------------------------
   Scroll-triggered reveals (IntersectionObserver + .is-visible)
   -------------------------------------------------------------------------- */
.reveal {
  transition:
    opacity var(--duration-enter) var(--ease-premium),
    transform var(--duration-enter) var(--ease-premium);
  transition-delay: var(--reveal-delay, 0ms);
  will-change: transform, opacity;
}

html.js .reveal:not(.is-visible) {
  opacity: 0;
  transform: translateY(10px);
}

/* Legal copy must stay visible and readable to screen readers at all times */
.legal .legal__content,
html.js .legal .legal__content.reveal,
html.js .legal .legal__content.reveal:not(.is-visible) {
  opacity: 1 !important;
  transform: none !important;
  will-change: auto;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal,
  .reveal:not(.is-visible) {
    opacity: 1;
    transform: none;
    transition: none;
    will-change: auto;
  }

  .header,
  main,
  .footer {
    will-change: auto;
  }
}

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

img {
  object-fit: cover;
}

a {
  color: inherit;
  text-decoration: none;
  -webkit-tap-highlight-color: rgba(255, 255, 255, 0.1);
}

button {
  -webkit-tap-highlight-color: rgba(255, 255, 255, 0.1);
}

:focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 3px;
  box-shadow: 0 0 0 4px var(--color-focus-glow);
}

/* Fallback for browsers without :focus-visible */
:focus:not(:focus-visible) {
  outline: none;
  box-shadow: none;
}

a:focus-visible,
button:focus-visible {
  border-radius: var(--radius-sm);
}

/* --------------------------------------------------------------------------
   Typography
   -------------------------------------------------------------------------- */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: var(--font-weight-semibold);
  text-wrap: balance;
}

h1 { font-size: var(--text-h1); line-height: var(--leading-heading); letter-spacing: var(--tracking-heading); }
h2 { font-size: var(--text-h2); line-height: var(--leading-heading); letter-spacing: var(--tracking-heading); }
h3 { font-size: var(--text-h3); line-height: var(--leading-subheading); letter-spacing: var(--tracking-subheading); }

p {
  max-width: 65ch;
  line-height: var(--leading-prose);
}

p + p {
  margin-top: var(--rhythm-1);
}

/* --------------------------------------------------------------------------
   Shared surfaces & glass
   -------------------------------------------------------------------------- */
.glass-panel {
  background: var(--glass-bg);
  background-image: var(--gradient-surface);
  backdrop-filter: blur(var(--glass-blur)) saturate(1.06);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(1.06);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg), var(--shadow-inset-deep);
  transition:
    transform var(--duration-base) var(--ease-premium),
    border-color var(--duration-base) var(--ease-premium),
    box-shadow var(--duration-base) var(--ease-premium);
}

.glass-text {
  color: var(--glass-text);
  text-shadow:
    0 1px 2px rgba(0, 0, 0, 0.4),
    0 0 20px rgba(255, 255, 255, 0.1);
}

.glass-text--liquid {
  color: var(--glass-text);
  background: linear-gradient(
    145deg,
    #ffffff 0%,
    #f0f0f0 48%,
    #ffffff 100%
  );
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  filter:
    drop-shadow(0 1px 2px rgba(0, 0, 0, 0.45))
    drop-shadow(0 0 12px rgba(255, 255, 255, 0.16));
}

@supports not ((-webkit-background-clip: text) or (background-clip: text)) {
  .glass-text--liquid {
    -webkit-text-fill-color: currentColor;
    background: none;
    filter: none;
  }
}

@media (prefers-contrast: more) {
  .glass-text--liquid {
    -webkit-text-fill-color: currentColor;
    color: var(--glass-text);
    background: none;
    filter: none;
  }
}

/* --------------------------------------------------------------------------
   Layout — mobile-first grid; columns expand at 768px+
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

.container--narrow {
  max-width: var(--container-narrow);
}

.grid {
  display: grid;
  grid-template-columns: repeat(var(--grid-columns), minmax(0, 1fr));
  gap: var(--space-24);
}

.col-span-12 { grid-column: span 12; }
.col-span-10,
.col-span-8,
.col-span-6,
.col-span-4 {
  grid-column: span 12;
}
.col-start-2,
.col-start-3 {
  grid-column-start: 1;
}

@media (min-width: 768px) {
  :root {
    --container-padding: var(--space-24);
    --section-padding: var(--space-64);

    /* Desktop typography scale — clamp() smooths between breakpoints */
    --text-body: clamp(1rem, 0.94rem + 0.28vw, 1.0625rem);
    --text-display: clamp(2rem, 1.45rem + 2.2vw, 3.25rem);
    --text-h1: clamp(1.875rem, 1.5rem + 1.5vw, 2.75rem);
    --text-h2: clamp(1.375rem, 1.15rem + 0.85vw, 1.75rem);
    --text-h3: clamp(1.125rem, 1.05rem + 0.4vw, 1.3125rem);
  }

  .col-span-10 { grid-column: span 10; }
  .col-span-8  { grid-column: span 8; }
  .col-span-6  { grid-column: span 6; }
  .col-span-4  { grid-column: span 4; }
  .col-start-2 { grid-column-start: 2; }
  .col-start-3 { grid-column-start: 3; }
}

@media (min-width: 1024px) {
  :root {
    --container-padding: var(--space-32);
  }
}

/* --------------------------------------------------------------------------
   Header & Navigation — mobile: collapsible menu; desktop: inline links
   -------------------------------------------------------------------------- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: auto;
  border-bottom: 1px solid var(--surface-chrome-border);
  background: var(--surface-chrome);
  backdrop-filter: blur(var(--glass-blur)) saturate(1.04);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(1.04);
  box-shadow: var(--shadow-sm);
}

.header__inner {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: var(--space-8);
}

.nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  min-height: var(--header-height);
  gap: var(--space-8);
}

.header__social {
  flex: 0 0 auto;
  width: 100%;
}

.header__social .social-nav__list {
  justify-content: center;
  gap: var(--space-4);
}

.logo {
  flex: 1 1 auto;
  min-width: 0;
  display: inline-flex;
  align-items: center;
  min-height: 3rem;
  max-width: calc(100% - 3.5rem);
  font-size: var(--text-small);
  font-weight: var(--font-weight-semibold);
  line-height: var(--leading-label);
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--glass-text);
  opacity: 1;
  transform: translateY(0);
  transition: var(--transition-interactive);
}

.logo:hover {
  color: var(--color-accent-hover);
  transform: translateY(var(--lift-xs));
}

.logo:active {
  transform: translateY(0);
  opacity: 0.82;
}

.nav-links {
  display: none;
  width: 100%;
  flex: 1 1 100%;
  flex-direction: column;
  align-items: stretch;
  gap: var(--space-4);
  padding-block: var(--space-16);
  margin-top: 0;
  border-top: 1px solid var(--border-subtle);
  list-style: none;
}

.nav.is-open .nav-links {
  display: flex;
}

html:not(.js) .nav-links {
  display: flex;
}

html:not(.js) .nav-toggle {
  display: none;
}

html:not(.js) #primary-nav {
  display: flex;
}

.nav-links li {
  display: flex;
  width: 100%;
}

.nav-links a {
  position: relative;
  display: flex;
  align-items: center;
  width: 100%;
  min-height: 3rem;
  padding: var(--space-8) var(--space-16);
  font-size: var(--text-small);
  font-weight: var(--font-weight-medium);
  line-height: var(--leading-label);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--color-text-secondary);
  transform: translateY(0);
  transition: var(--transition-interactive);
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: var(--space-16);
  right: var(--space-16);
  bottom: 0.2rem;
  height: 1px;
  background: currentColor;
  opacity: 0;
  transform: scaleX(0.5);
  transition:
    opacity var(--duration-base) var(--ease-soft),
    transform var(--duration-base) var(--ease-premium);
}

.nav-links a:hover {
  opacity: 1;
  color: var(--color-accent-hover);
  transform: translateY(var(--lift-xs));
}

.nav-links a:hover::after {
  opacity: 0.4;
  transform: scaleX(1);
}

.nav-links a:active {
  transform: translateY(0);
  opacity: 0.78;
}

.nav-links a[aria-current="page"] {
  opacity: 1;
  color: var(--glass-text);
}

.nav-links a[aria-current="page"]::after {
  opacity: 0.28;
  transform: scaleX(1);
}

.logo:focus-visible,
.nav-links a:focus-visible {
  outline-offset: 4px;
}

.nav-toggle {
  display: inline-flex;
  flex: 0 0 auto;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  min-width: 3rem;
  min-height: 3rem;
  margin-left: auto;
  padding: var(--space-8);
  background: transparent;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--glass-text);
  transition: var(--transition-interactive);
}

.nav-toggle__bar {
  display: block;
  width: 1.25rem;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  transition: transform var(--duration-base) var(--ease-premium), opacity var(--duration-base) var(--ease-soft);
}

.nav-toggle:hover {
  border-color: var(--border-strong);
  background-color: var(--surface-interactive);
}

.nav-toggle:focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 3px;
  box-shadow: 0 0 0 4px var(--color-focus-glow);
}

.nav.is-open .nav-toggle__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav.is-open .nav-toggle__bar:nth-child(2) {
  opacity: 0;
}

.nav.is-open .nav-toggle__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* --------------------------------------------------------------------------
   Social navigation — header & footer
   -------------------------------------------------------------------------- */
.social-nav__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  list-style: none;
}

.social-nav__link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.75rem;
  min-height: 2.75rem;
  padding: var(--space-8);
  color: var(--color-text-secondary);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  transition: var(--transition-interactive);
}

.social-nav__link svg {
  width: 1.25rem;
  height: 1.25rem;
  flex-shrink: 0;
}

.social-nav__link:hover {
  color: var(--color-accent-hover);
  background-color: var(--surface-interactive);
  border-color: var(--border-subtle);
  transform: translateY(var(--lift-xs));
}

.social-nav__link:active {
  transform: translateY(0);
  opacity: 0.82;
}

.social-nav__link:focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 3px;
  box-shadow: 0 0 0 4px var(--color-focus-glow);
  color: var(--color-accent-hover);
}

.social-nav--footer {
  margin-bottom: var(--rhythm-2);
}

.social-nav--footer .social-nav__list {
  justify-content: center;
}

.social-nav--footer .social-nav__link {
  color: var(--color-text-muted);
}

@media (min-width: 768px) {
  .header {
    height: var(--header-height);
  }

  .header__inner {
    flex-direction: row;
    flex-wrap: nowrap;
    align-items: center;
    gap: var(--space-16);
    min-height: var(--header-height);
  }

  .nav {
    flex: 1 1 auto;
    flex-wrap: nowrap;
    width: auto;
    min-width: 0;
    height: 100%;
    min-height: 0;
    gap: var(--space-16);
  }

  .header__social {
    flex: 0 0 auto;
    width: auto;
  }

  .header__social .social-nav__list {
    flex-wrap: nowrap;
    justify-content: flex-end;
    gap: var(--space-4);
  }

  #primary-nav[hidden] {
    display: flex !important;
  }

  .logo {
    flex: 0 0 auto;
    display: block;
    min-height: 0;
    max-width: none;
  }

  .nav-toggle {
    display: none;
  }

  .nav-links {
    display: flex;
    flex: 0 1 auto;
    width: auto;
    flex-direction: row;
    align-items: center;
    gap: var(--space-16);
    padding-block: 0;
    margin-top: 0;
    border-top: none;
  }

  .nav-links li {
    width: auto;
  }

  .nav-links a {
    display: block;
    width: auto;
    min-height: 0;
    padding: var(--space-8) var(--space-8);
  }

  .nav-links a::after {
    left: var(--space-8);
    right: var(--space-8);
  }
}

@media (min-width: 768px) and (max-width: 1023px) {
  .nav-links {
    gap: var(--space-8);
  }

  .nav-links a {
    padding: var(--space-8) var(--space-4);
  }
}

/* --------------------------------------------------------------------------
   Hero — mobile: simplified parallax; desktop: perspective depth
   Viewport height uses 100dvh + -webkit-fill-available for in-app browsers.
   -------------------------------------------------------------------------- */
.hero {
  position: relative;
  flex: 1;
  display: flex;
  align-items: center;
  padding-block: var(--space-32);
  min-height: calc(100dvh - var(--header-height) - var(--space-32));
  overflow: hidden;
  isolation: isolate;
  perspective: none;
}

/* Parallax background — perspective + translateZ depth */
.hero__parallax {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  transform-style: preserve-3d;
  pointer-events: none;
}

.hero__parallax-layer {
  position: absolute;
  inset: 0;
  background-image: var(--bg-scrim), var(--bg-image);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  image-rendering: auto;
  transform: none;
  transform-origin: center center;
  will-change: transform, opacity;
}

@media (prefers-reduced-motion: no-preference) {
  .hero__parallax-layer {
    animation: ambient-bg-drift var(--ambient-duration) var(--ambient-ease) infinite alternate;
  }

  @supports (animation-timeline: scroll()) {
    .hero__parallax-layer {
      animation:
        ambient-bg-drift var(--ambient-duration) var(--ambient-ease) infinite alternate,
        hero-parallax-scroll linear both;
      animation-timeline: auto, scroll(root block);
      animation-range: normal, 0 100dvh;
    }
  }
}

@keyframes hero-parallax-scroll {
  from {
    transform: translateZ(var(--parallax-depth)) scale(var(--parallax-scale)) translateY(0);
  }
  to {
    transform: translateZ(var(--parallax-depth)) scale(var(--parallax-scale)) translateY(5%);
  }
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--gradient-vignette), var(--gradient-hero-glow);
  pointer-events: none;
  z-index: 2;
  will-change: opacity;
}

@media (prefers-reduced-motion: no-preference) {
  .hero::after {
    animation: ambient-glow var(--ambient-duration-glow) var(--ambient-ease) infinite alternate;
  }
}

.hero .container {
  position: relative;
  z-index: 3;
  width: 100%;
  transform: translateZ(0);
}

.hero__content {
  width: 100%;
  max-width: var(--hero-max-width);
  margin-inline: auto;
  padding: var(--space-24) var(--space-16);
  text-align: center;
  background: var(--glass-bg-strong);
}

.hero-title {
  white-space: normal;
  overflow-wrap: break-word;
  font-size: var(--text-display);
  font-weight: var(--font-weight-semibold);
  line-height: var(--leading-display);
  letter-spacing: var(--tracking-heading);
  margin-bottom: var(--rhythm-2);
  text-wrap: balance;
}

.hero-subtitle {
  max-width: none;
  white-space: normal;
  font-size: var(--text-label);
  font-weight: var(--font-weight-medium);
  line-height: var(--leading-label);
  letter-spacing: var(--tracking-caps);
  color: var(--color-text-primary);
  text-transform: uppercase;
}

#main {
  scroll-margin-top: var(--header-height);
}

.legal__title,
.skip-target {
  scroll-margin-top: var(--header-height);
}

.legal__title:focus,
.legal__title:focus-visible,
.skip-target:focus,
.skip-target:focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 3px;
  box-shadow: 0 0 0 4px var(--color-focus-glow);
}

main:focus,
main:focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 3px;
  box-shadow: 0 0 0 4px var(--color-focus-glow);
}

@media (min-width: 768px) {
  .hero {
    padding-block: var(--space-64);
    min-height: calc(100dvh - var(--header-height) - var(--space-64));
    perspective: 1px;
    perspective-origin: center center;
  }

  .hero__parallax-layer {
    inset: -12% 0;
    transform: translateZ(var(--parallax-depth)) scale(var(--parallax-scale));
  }

  .hero__content {
    padding: var(--space-32) var(--space-24);
  }

  .hero-title {
    letter-spacing: var(--tracking-display);
  }
}

@media (prefers-reduced-motion: reduce) {
  .hero {
    perspective: none;
  }

  .hero__parallax-layer {
    transform: none;
    will-change: auto;
  }

  .hero::after {
    will-change: auto;
  }
}

/* --------------------------------------------------------------------------
   Sections — vertical rhythm via --section-padding token
   -------------------------------------------------------------------------- */
.section {
  flex: 1;
  padding-block: var(--section-padding);
}

.section--compact {
  padding-block: var(--space-32);
}

.page-header {
  margin-bottom: var(--space-24);
}

.page-title {
  font-size: var(--text-h1);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--tracking-heading);
  line-height: var(--leading-heading);
  text-align: center;
  margin-bottom: var(--rhythm-2);
  color: var(--glass-text);
  text-wrap: balance;
}

.page-intro {
  max-width: 42ch;
  margin-inline: auto;
  font-size: var(--text-body-lg);
  line-height: var(--leading-prose);
  letter-spacing: var(--tracking-body);
  color: var(--glass-text-soft);
  text-align: center;
  text-wrap: pretty;
}

@media (min-width: 768px) {
  .page-header {
    margin-bottom: var(--space-32);
  }
}

/* --------------------------------------------------------------------------
   Product cards
   -------------------------------------------------------------------------- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--space-24);
  align-items: stretch;
}

.product-card {
  grid-column: span 12;
  position: relative;
  display: flex;
  flex-direction: column;
  padding: var(--space-24);
  border-radius: var(--radius-lg);
  border: 1px solid var(--glass-border);
  background-color: var(--color-bg-elevated);
  background-image: var(--gradient-surface);
  backdrop-filter: blur(var(--glass-blur)) saturate(1.06);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(1.06);
  box-shadow: var(--shadow-md), var(--shadow-inset-deep);
  transition: var(--transition-interactive);
}

.product-card.reveal:not(.is-visible) {
  transform: translateY(10px);
}

.product-card.reveal.is-visible {
  transform: translateY(0);
}

.product-card:hover {
  transform: translateY(var(--lift-hover));
  border-color: var(--border-strong);
  background-color: var(--color-bg-overlay);
  box-shadow: var(--shadow-lg), var(--shadow-inset-deep);
}

.product-card:active {
  transform: translateY(calc(var(--lift-hover) + var(--press-sm)));
  opacity: 0.94;
}

.product-card h2 {
  font-size: var(--text-h3);
  font-weight: var(--font-weight-semibold);
  line-height: var(--leading-subheading);
  letter-spacing: var(--tracking-subheading);
  margin-bottom: var(--rhythm-1);
  color: var(--glass-text);
  text-wrap: balance;
  transition:
    opacity var(--duration-base) var(--ease-soft),
    transform var(--duration-base) var(--ease-premium);
}

.product-card:hover h2 {
  transform: translateY(var(--lift-xs));
}

.product-card p {
  max-width: none;
  font-size: var(--text-body);
  line-height: var(--leading-prose);
  color: var(--color-text-secondary);
}

.product-card:hover p {
  color: var(--color-text-primary);
}

.product-note {
  margin-top: var(--rhythm-2);
  font-size: var(--text-caption);
  line-height: var(--leading-label);
  letter-spacing: var(--tracking-caps);
  font-weight: var(--font-weight-medium);
  text-transform: uppercase;
  color: var(--color-text-secondary);
  opacity: 1;
  transition:
    opacity var(--duration-base) var(--ease-soft),
    color var(--duration-base) var(--ease-soft);
}

.product-card:hover .product-note {
  color: var(--color-text-secondary);
}

.product-card__media {
  margin: calc(-1 * var(--space-24)) calc(-1 * var(--space-24)) var(--rhythm-2);
  overflow: hidden;
  border-radius: calc(var(--radius-lg) - 1px) calc(var(--radius-lg) - 1px) 0 0;
}

.product-card__media img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

@media (min-width: 768px) {
  .product-card {
    grid-column: span 6;
    padding: var(--space-32);
  }

  .product-card__media {
    margin: calc(-1 * var(--space-32)) calc(-1 * var(--space-32)) var(--rhythm-2);
  }

  .button {
    width: auto;
    max-width: none;
  }
}

.product-card__body {
  display: flex;
  flex-direction: column;
  gap: var(--rhythm-1);
  flex: 1;
}

.product-card__actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-12);
  margin-top: var(--rhythm-2);
}

.product-card__actions .button {
  margin-top: 0;
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: var(--rhythm-2);
  padding: var(--space-8) var(--space-24);
  min-height: 3rem;
  width: 100%;
  max-width: 100%;
  font-size: var(--text-small);
  font-weight: var(--font-weight-medium);
  line-height: var(--leading-label);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--color-text-primary);
  background-color: var(--surface-interactive);
  background-image: var(--gradient-surface);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  opacity: 0.94;
  transform: translateY(0);
  transition: var(--transition-interactive);
}

.button:hover {
  background-color: var(--surface-interactive-hover);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
  transform: translateY(var(--lift-sm));
  opacity: 1;
}

.button:active {
  transform: translateY(var(--press-sm));
  opacity: 0.88;
  box-shadow: var(--shadow-sm);
}

.button:focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 3px;
  box-shadow: var(--shadow-sm), 0 0 0 4px var(--color-focus-glow);
}

.legal__content a:focus-visible {
  outline-offset: 4px;
  border-radius: 2px;
}

/* --------------------------------------------------------------------------
   Legal — mobile-compact panels; desktop widens padding
   -------------------------------------------------------------------------- */
.legal {
  flex: 1;
  padding-block: var(--section-padding);
}

.legal__content {
  max-width: 100%;
  padding: var(--space-24);
  background-color: var(--color-bg-surface);
  background-image: var(--gradient-surface);
  backdrop-filter: blur(var(--glass-blur)) saturate(1.06);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(1.06);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg), var(--shadow-inset-deep);
}

.legal__content h1,
.legal__title {
  font-size: var(--text-h1);
  letter-spacing: var(--tracking-heading);
  line-height: var(--leading-heading);
  margin-bottom: var(--rhythm-2);
  color: var(--glass-text);
  text-wrap: balance;
}

.legal__intro {
  margin-bottom: var(--rhythm-4);
}

.legal__intro:last-child {
  margin-bottom: 0;
}

.legal__content h2 {
  font-size: var(--text-h2);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  margin-bottom: var(--rhythm-1);
  color: var(--glass-text);
  text-wrap: balance;
}

.legal__section + .legal__section {
  margin-top: var(--rhythm-4);
}

.legal__section:first-of-type {
  margin-top: var(--rhythm-4);
}

.legal__section h2 {
  margin-top: 0;
}

.legal__content > h2 {
  margin-top: var(--rhythm-4);
}

.legal__content p,
.legal__content li {
  font-size: var(--text-body);
  line-height: var(--leading-prose);
  color: var(--glass-text-soft);
  margin-bottom: var(--rhythm-1);
  max-width: 65ch;
}

.legal__content ul {
  padding-left: var(--rhythm-2);
  margin-bottom: var(--rhythm-2);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.privacy-label {
  margin-top: var(--rhythm-1);
  margin-bottom: var(--rhythm-2);
  overflow-x: auto;
}

.legal__content table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-body);
  line-height: var(--leading-prose);
  color: var(--glass-text-soft);
}

.legal__content th,
.legal__content td {
  padding: var(--space-12) var(--space-16);
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--glass-border);
}

.legal__content thead th {
  font-size: var(--text-small);
  font-weight: var(--font-weight-medium);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--glass-text);
  border-bottom: 1px solid var(--border-strong);
}

.legal__content tbody th {
  font-weight: var(--font-weight-medium);
  color: var(--glass-text);
}

.legal__content tbody tr:last-child th,
.legal__content tbody tr:last-child td {
  border-bottom: none;
}

.legal__content a {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color var(--duration-base) var(--ease-premium), opacity var(--duration-base) var(--ease-premium);
}

.legal__content a:hover,
.legal__content a:focus-visible {
  color: var(--color-accent-hover);
  opacity: 1;
}

@media (min-width: 768px) {
  .legal__content {
    padding: var(--space-32);
  }
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
  margin-top: auto;
  padding-block: var(--space-24);
  border-top: 1px solid var(--surface-chrome-border);
  background: var(--surface-chrome);
  backdrop-filter: blur(var(--glass-blur)) saturate(1.04);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(1.04);
  text-align: center;
}

.footer p {
  max-width: none;
  font-size: var(--text-caption);
  font-weight: var(--font-weight-medium);
  line-height: var(--leading-prose);
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--color-text-secondary);
  text-wrap: balance;
}

/* High-contrast / forced-colors mode — preserve focus and structure */
@media (forced-colors: active) {
  .skip-link:focus-visible,
  :focus-visible,
  .button:focus-visible,
  .nav-toggle:focus-visible,
  .legal__title:focus,
  .legal__title:focus-visible,
  .skip-target:focus,
  .skip-target:focus-visible,
  main:focus,
  main:focus-visible {
    outline: 2px solid Highlight;
    outline-offset: 3px;
    box-shadow: none;
  }

  .header,
  .footer,
  .glass-panel,
  .legal__content,
  .product-card,
  .button,
  .nav-toggle,
  .social-nav__link {
    border: 1px solid CanvasText;
  }
}

/* Overflow containment for glass panels in narrow WebViews */
.hero__content,
.legal__content,
.glass-panel {
  max-width: 100%;
}