/* ------------------------------------------------------
   Rainforest Studio — Brand Stylesheet (v2, modernized)
   Modern features: @layer, container queries, OKLCH + color-mix,
   dvh-safe heights, mobile-first structure
   ------------------------------------------------------ */

@import url('https://fonts.googleapis.com/css2?family=Manrope:wght@400..800&family=Space+Grotesk:wght@400..700&display=swap');

@layer reset, tokens, base, components, utilities, overrides;

@view-transition { navigation: auto; }
html { view-transition-name: page; position: relative; }

/* ========================= TOKENS ========================= */
@layer tokens {
  /* Core color tokens in OKLCH for perceptual consistency */
  :root {
    /* OKLCH base (with hex fallbacks via legacy vars) */
    --ok-forest: #0B3D2E;                   /* deep forest */
    --ok-forest-ink: color-mix(in oklch, var(--ok-forest) 78%, black 18%);
    --ok-canopy: oklch(65% 0.14 150);       /* canopy green */
    --ok-lime: oklch(83% 0.16 125);         /* lime highlight */

    /* Derivatives using color-mix */
    --ok-bg: #F6F6F2;
    --ok-surface: color-mix(in oklch, white 98%, var(--ok-forest));
    --ok-ink: oklch(22% 0.03 260);
    --ok-muted: oklch(55% 0.03 260);
    --ok-border: color-mix(in oklch, white 82%, var(--ok-forest));

    /* Legacy names mapped to OKLCH for component usage */
    --rs-primary: var(--ok-forest);
    --rs-primary-600: color-mix(in oklch, black 12%, var(--ok-forest));
    --rs-accent: var(--ok-canopy);
    --rs-accent-2: var(--ok-lime);
    --rs-bg: var(--ok-bg);
    --rs-surface: var(--ok-surface);
    --rs-text: var(--ok-ink);
    --rs-muted: var(--ok-muted);
    --rs-border: var(--ok-border);

    /* Radii, elevation, motion */
    --rs-radius: 14px;
    --rs-radius-sm: 10px;
    --rs-shadow: 0 10px 30px rgba(11,61,46,0.07);
    --rs-gap: 1rem;
    --rs-speed: 200ms;
    --rs-ease: cubic-bezier(.22,.61,.36,1);

    /* Fluid type scale */
    --step--1: clamp(.9rem, .86rem + .2vw, .98rem);
    --step-0: clamp(1rem, .98rem + .4vw, 1.125rem);
    --step-1: clamp(1.15rem, 1.05rem + .9vw, 1.35rem);
    --step-2: clamp(1.35rem, 1.15rem + 1.6vw, 1.7rem);
    --step-3: clamp(1.7rem, 1.3rem + 3vw, 2.4rem);

    --font-sans: "Manrope", system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
    --font-display: "Space Grotesk", "Manrope", sans-serif;

    /* Moodboard-driven textures & gradients */
    --hero-ink: color-mix(in oklch, var(--rs-text) 88%, black);
    --hero-glow-1: color-mix(in oklch, var(--rs-accent) 28%, white);
    --hero-glow-2: color-mix(in oklch, var(--rs-primary) 22%, black);
    --hero-wash: color-mix(in oklch, var(--rs-bg) 92%, var(--rs-accent));

    /* Moodboard palette accents */
    --sun-amber: #E5B769;
    --amber-deep: color-mix(in oklch, var(--sun-amber) 75%, black 12%);
    --canopy-deep: color-mix(in oklch, var(--rs-primary) 88%, black 12%);
    --canopy-grad: radial-gradient(120% 140% at 15% 20%, var(--sun-amber) 0%, transparent 45%),
                   radial-gradient(120% 140% at 85% 25%, color-mix(in oklch, var(--rs-accent) 75%, white) 0%, transparent 55%),
                   linear-gradient(180deg, color-mix(in oklch, var(--rs-primary) 90%, black) 0%, color-mix(in oklch, var(--rs-primary) 65%, white) 100%);

    /* Tiny SVG noise texture (very subtle) */
    --tx-noise: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120' viewBox='0 0 120 120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3CfeComponentTransfer%3E%3CfeFuncA type='table' tableValues='0 0.04'/%3E%3C/feComponentTransfer%3E%3C/filter%3E%3Crect width='120' height='120' filter='url(%23n)'/%3E%3C/svg%3E");
    /* Subtle repeating canopy texture (leaf-vein lines) */
    --canopy-tile: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='320' height='320' viewBox='0 0 320 320'%3E%3Cdefs%3E%3ClinearGradient id='g' x1='0' y1='0' x2='1' y2='1'%3E%3Cstop offset='0' stop-color='%232D5532' stop-opacity='0.05'/%3E%3Cstop offset='1' stop-color='%234A7C59' stop-opacity='0.05'/%3E%3C/linearGradient%3E%3C/defs%3E%3Cg fill='none' stroke='url(%23g)' stroke-width='1'%3E%3Cpath d='M0 40 C80 30, 240 50, 320 40'/%3E%3Cpath d='M0 80 C100 70, 220 90, 320 80'/%3E%3Cpath d='M0 120 C70 110, 250 130, 320 120'/%3E%3Cpath d='M0 160 C90 150, 230 170, 320 160'/%3E%3Cpath d='M0 200 C110 190, 210 210, 320 200'/%3E%3Cpath d='M0 240 C85 230, 235 250, 320 240'/%3E%3Cpath d='M0 280 C95 270, 225 290, 320 280'/%3E%3C/g%3E%3C/svg%3E");
  }
}

/* ========================= THEME: Figma-Inspired ("fern") ========================= */
@layer tokens {
  /* Apply by adding class .theme-fern on <html> or <body> */
  :root.theme-fern {
    /* Map Figma palette to our token system */
    --ok-forest: #2D5532;        /* primary */
    --ok-canopy: #4A7C59;        /* accent */
    --ok-lime: #8FBC8F;          /* secondary/highlight */
    --ok-bg: #FAFFFE;            /* background */
    --ok-surface: #FFFFFF;       /* card/popover */
    --ok-ink: #1A2E1F;           /* foreground */
    --ok-muted: #4A5C4F;         /* muted fg */
    --ok-border: rgba(45,85,50,.15);

    /* Recompute the derived rs-* aliases */
    --rs-primary: var(--ok-forest);
    --rs-primary-600: color-mix(in oklch, black 12%, var(--ok-forest));
    --rs-accent: var(--ok-canopy);
    --rs-accent-2: var(--ok-lime);
    --rs-bg: var(--ok-bg);
    --rs-surface: var(--ok-surface);
    --rs-text: var(--ok-ink);
    --rs-muted: var(--ok-muted);
    --rs-border: var(--ok-border);
  }

  /* Dark mode for the fern theme: add both .theme-fern.dark */
  .theme-fern.dark {
    --tx-noise: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120' viewBox='0 0 120 120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3CfeComponentTransfer%3E%3CfeFuncA type='table' tableValues='0 0.025'/%3E%3C/feComponentTransfer%3E%3C/filter%3E%3Crect width='120' height='120' filter='url(%23n)'/%3E%3C/svg%3E");
    /* Subtle repeating canopy texture (leaf-vein lines) -- same tile, slightly stronger via selector opacity */
    --ok-bg: #0F1A11;
    --ok-surface: #1A2E1F;
    --ok-ink: #E8F5EA;
    --ok-muted: #A8D5AA;
    --ok-border: rgba(143,188,143,0.2);

    --ok-forest: #8FBC8F;        /* swap primary/secondary emphasis */
    --ok-canopy: #4A7C59;
    --ok-lime: #2D5532;

    --rs-primary: var(--ok-forest);
    --rs-primary-600: color-mix(in oklch, black 12%, var(--ok-forest));
    --rs-accent: var(--ok-canopy);
    --rs-accent-2: var(--ok-lime);
    --rs-bg: var(--ok-bg);
    --rs-surface: var(--ok-surface);
    --rs-text: var(--ok-ink);
    --rs-muted: var(--ok-muted);
    --rs-border: var(--ok-border);
  }
}

/* Typography polish for Space Grotesk headings */
@layer base {
  h1, h2 { letter-spacing: -0.005em; }
  h1 { font-weight: 700; }
  h2 { font-weight: 600; }
}

/* ========================= BASE ========================= */
@layer base {
  * { box-sizing: border-box; }
  html, body { height: 100%; }
  /* Site chrome canopy texture */
  html::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    background-image:
      radial-gradient(160% 120% at 20% 0%, color-mix(in oklch, var(--sun-amber) 8%, transparent) 0%, transparent 60%),
      var(--canopy-tile),
      var(--tx-noise),
      /* url("/assets/images/rainforest.jpg"); */
    background-repeat: no-repeat, repeat, repeat;
    background-size: cover, 320px 320px, auto;
    background-position: center top, 0 0, 0 0;
    opacity: .55;
  }
  .dark html::before,
  html.dark::before {
    opacity: .42;
  }
  body {
    font-family: var(--font-sans);
    margin: 0;
    color: var(--rs-text);
    background: var(--rs-bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    display: flex;
    flex-direction: column;
  }
  img, svg, video { display: block; max-width: 100%; }

  /* Containers are also container-query roots */
  .container { width: min(1200px, 94vw); margin: 0 auto; padding-inline: clamp(1rem, 3vw, 2rem); container-type: inline-size; }
  .section { padding-block: clamp(1.5rem, 3vw, 3rem); padding-inline: 0; container-type: inline-size; }
  .site-main { flex: 1; width: min(1200px, 94vw); margin: 0 auto; padding: clamp(1.5rem, 2vw, 3rem) clamp(1rem, 3vw, 2rem) clamp(3rem, 4vw, 4rem); }

  h1,h2,h3 { line-height: 1.25; margin: 0; }
  h1 { font-family: var(--font-display); font-weight: 600; font-size: var(--step-3); color: var(--rs-primary); }
  h2 { font-family: var(--font-display); font-size: var(--step-2); color: color-mix(in oklch, var(--rs-primary) 88%, white); margin-bottom: .75rem; }
  p { font-size: var(--step-0); color: var(--rs-muted); }

  a { color: color-mix(in oklch, var(--rs-primary) 80%, black); text-underline-offset: 3px; transition: color var(--rs-speed) var(--rs-ease), box-shadow var(--rs-speed) var(--rs-ease); }
  a:hover { color: var(--rs-accent); text-decoration: none; box-shadow: 0 12px 26px rgba(11,61,46,.1); }

  h1 a { color: white; text-decoration: none; }
}

/* ====================== COMPONENTS ====================== */
@layer components {
  /* Header / Nav */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 40;
    box-shadow: 0 10px 28px rgba(0,0,0,.18);
    backdrop-filter: blur(12px) saturate(120%);
    color: color-mix(in oklch, var(--rs-primary) 82%, black 6%);
  }
  .site-header .container { padding-block: clamp(.65rem, .4rem + 1vw, 1.1rem); }
  .header-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: .75rem;
    flex-wrap: wrap;
  }
  .header-bar .brand {
    font-weight: 800;
    font-size: clamp(1.35rem, 1.15rem + 2vw, 2.1rem);
    letter-spacing: .2px;
    margin: 0;
    text-decoration: none;
    color: color-mix(in oklch, var(--rs-primary) 88%, black 6%);
    display: inline-flex;
    align-items: center;
    gap: .65rem;
    flex-shrink: 0;
  }
  .brand__logo {
    width: clamp(36px, 5vw, 44px);
    height: clamp(36px, 5vw, 44px);
    display: block;
  }
  .brand__label { color: inherit; }
  .header-bar .brand:focus-visible { outline: 2px solid var(--rs-accent-2); outline-offset: 3px; }

  .theme-controls { display: flex; align-items: center; gap: .5rem; }

  .nav-toggle {
    appearance: none;
    border: 1px solid color-mix(in oklch, var(--rs-border) 70%, white 12%);
    background: color-mix(in oklch, var(--rs-surface) 92%, white 6%);
    color: color-mix(in oklch, var(--rs-primary) 82%, black 8%);
    border-radius: 999px;
    padding: .45rem .75rem;
    font: inherit;
    font-weight: 600;
    display: flex;
    align-items: center;
    /* gap: .6rem; */
    cursor: pointer;
    transition: background var(--rs-speed) var(--rs-ease), border-color var(--rs-speed) var(--rs-ease);
  }
  .nav-toggle:hover { background: color-mix(in oklch, var(--rs-surface) 86%, white 10%); border-color: color-mix(in oklch, var(--rs-border) 65%, white 16%); }
  .nav-toggle__icon {
    position: relative;
    display: block;
    width: 18px;
    height: 2px;
    background: currentColor;
    border-radius: 999px;
    transition: transform var(--rs-speed) var(--rs-ease), background var(--rs-speed) var(--rs-ease);
  }
  .nav-toggle__icon::before,
  .nav-toggle__icon::after {
    content: "";
    position: absolute;
    left: 0;
    width: 18px;
    height: 2px;
    background: currentColor;
    border-radius: 999px;
    transition: transform var(--rs-speed) var(--rs-ease), opacity var(--rs-speed) var(--rs-ease);
  }
  .nav-toggle__icon::before { transform: translateY(-6px); }
  .nav-toggle__icon::after { transform: translateY(6px); }
  .nav-toggle[aria-expanded="true"] .nav-toggle__icon { background: transparent; }
  .nav-toggle[aria-expanded="true"] .nav-toggle__icon::before { transform: rotate(45deg); }
  .nav-toggle[aria-expanded="true"] .nav-toggle__icon::after { transform: rotate(-45deg); }

  .site-nav {
    flex: 1 1 100%;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: .75rem;
  }
  .site-nav .nav-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: .5rem;
    margin: 0;
    padding: 0;
    width: 100%;
  }
  .site-nav a {
    color: color-mix(in oklch, var(--rs-text) 92%, white 6%);
    text-decoration: none;
    font-weight: 600;
    padding: .55rem .8rem;
    border-radius: 999px;
    display: inline-flex;
    align-items: center;
    transition: background var(--rs-speed) var(--rs-ease), color var(--rs-speed) var(--rs-ease), transform var(--rs-speed) var(--rs-ease);
  }
  .site-nav a:hover { background: color-mix(in oklch, var(--rs-accent) 18%, transparent); color: color-mix(in oklch, var(--rs-primary) 94%, white 6%); transform: translateY(-1px); }
  .site-nav a[aria-current="page"], .site-nav a.active { background: color-mix(in oklch, var(--rs-accent) 28%, transparent); color: #fff; }
  .site-header .theme-controls .btn { color: color-mix(in oklch, var(--rs-primary) 82%, black 8%); border-color: color-mix(in oklch, var(--rs-border) 70%, white 12%); background: color-mix(in oklch, var(--rs-surface) 92%, white 6%); }
  .site-header .theme-controls .btn:hover { background: color-mix(in oklch, var(--rs-surface) 86%, white 12%); }


  .dark .site-header { color: color-mix(in oklch, white 94%, var(--sun-amber) 6%); }
  .dark .header-bar .brand { color: color-mix(in oklch, white 94%, var(--sun-amber) 6%); }
  .dark .nav-toggle { border-color: color-mix(in oklch, var(--rs-border) 55%, white 28%); background: color-mix(in oklch, var(--rs-surface) 55%, black 20%); color: color-mix(in oklch, white 92%, var(--sun-amber) 6%); }
  .dark .nav-toggle:hover { background: color-mix(in oklch, var(--rs-surface) 50%, black 30%); }
  .dark .site-nav a { color: color-mix(in oklch, white 90%, var(--sun-amber) 10%); }
  .dark .site-nav a:hover, .dark .site-nav a[aria-current="page"], .dark .site-nav a.active { color: color-mix(in oklch, white 98%, var(--sun-amber) 12%); }
  .dark .site-header .theme-controls .btn { color: color-mix(in oklch, white 92%, var(--sun-amber) 8%); border-color: color-mix(in oklch, var(--rs-border) 50%, white 24%); background: color-mix(in oklch, var(--rs-surface) 52%, black 28%); }
  .dark .site-header .theme-controls .btn:hover { background: color-mix(in oklch, var(--rs-surface) 46%, black 34%); }
  @media (max-width: 719px) {
    body.nav-collapsible .site-nav { display: none; }
    body.nav-collapsible .site-nav.is-open { display: flex; }
    .site-header .container { padding-bottom: clamp(.35rem, .2rem + 1vw, .9rem); }
    .header-bar { align-items: stretch; }
    .brand__label {
      position: absolute;
      width: 1px;
      height: 1px;
      padding: 0;
      margin: -1px;
      overflow: hidden;
      clip: rect(0 0 0 0);
      white-space: nowrap;
      border: 0;
    }
    .brand__logo { width: 38px; height: 38px; }
    .site-nav { order: 2; padding-top: .25rem; }
    .site-nav .nav-list { padding-block: .75rem; border-top: 1px solid rgba(255,255,255,.12); }
    .site-nav .nav-list li { width: 100%; }
    .site-nav a { width: 100%; justify-content: space-between; }
    .site-nav .theme-controls {
      width: 100%;
      border-top: 1px solid rgba(255,255,255,.12);
      padding-top: .75rem;
      justify-content: flex-start;
    }
  }

  @media (min-width: 720px) {
    .nav-toggle { display: none; }
    .site-nav {
      flex: 0 1 auto;
      width: auto;
      display: flex !important;
      flex-direction: row;
      align-items: center;
      gap: 1.35rem;
    }
    body.nav-collapsible .site-nav { display: flex !important; }
    .site-nav .nav-list {
      flex-direction: row;
      align-items: center;
      gap: 1.15rem;
      padding: 0;
      border-top: 0;
      width: auto;
    }
    .site-nav .theme-controls {
      border-top: 0;
      padding-top: 0;
      margin-left: auto;
    }
  }

  /* Container query: widen nav spacing on larger containers (not viewport) */
  @container (min-width: 720px) {
    .site-nav .nav-list { gap: 1.35rem; }
  }

  /* Surfaces */
  .card { background: var(--rs-surface); border: 1px solid var(--rs-border); border-radius: var(--rs-radius); box-shadow: var(--rs-shadow); }

  /* Hero */
  .hero { position: relative; }
  .hero .container {
    position: relative;
    border-radius: var(--rs-radius);
    border: 1px solid var(--rs-border);
    padding-block: clamp(2rem, 2vw + 1.5rem, 3.5rem);
    padding-inline: clamp(1.5rem, 3vw, 3rem);
    overflow: hidden;
    background-color: color-mix(in oklch, var(--rs-bg) 88%, black 6%);
    backdrop-filter: saturate(115%);
  }
  .hero .container::before {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    background-image:
      radial-gradient(120% 120% at 8% 12%, color-mix(in oklch, var(--sun-amber) 24%, transparent) 0%, transparent 65%),
      radial-gradient(120% 120% at 92% 18%, color-mix(in oklch, var(--rs-primary) 18%, transparent) 0%, transparent 55%),
      var(--canopy-grad),
      var(--tx-noise);
    background-blend-mode: screen, multiply, normal, normal;
    opacity: .75;
    z-index: 0;
  }
  .hero .container::after {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    background: linear-gradient(135deg, rgba(255,255,255,0.52) 0%, rgba(255,255,255,0.15) 45%, rgba(10,40,28,0.32) 100%);
    mix-blend-mode: soft-light;
    z-index: 0;
  }
  .dark .hero .container {
    background-color: color-mix(in oklch, var(--rs-bg) 60%, black 20%);
  }
  .dark .hero .container::before {
    opacity: .55;
    background-blend-mode: screen, multiply, normal, normal;
  }
  .dark .hero .container::after {
    background: linear-gradient(130deg, rgba(5,14,10,0.85) 0%, rgba(8,24,16,0.68) 50%, rgba(3,10,7,0.9) 100%);
    mix-blend-mode: normal;
  }

  .hero__grid {
    position: relative;
    z-index: 1;
    display: grid;
    gap: clamp(1.2rem, 3vw, 2.5rem);
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    align-items: center;
  }
  @media (max-width: 900px) {
    .hero__grid { grid-template-columns: 1fr; }
    .hero__media { order: -1; }
  }

  .hero__content { position: relative; display: grid; gap: clamp(.75rem, 1vw, 1.25rem); max-width: 52ch; }
  .hero__eyebrow {
    margin: 0;
    font-size: var(--step--1);
    letter-spacing: .12em;
    text-transform: uppercase;
    font-weight: 600;
    color: color-mix(in oklch, var(--rs-text) 75%, white);
  }
  .hero__title {
    margin: 0;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: clamp(2.4rem, 1.6rem + 3.8vw, 3.6rem);
    letter-spacing: -0.015em;
    color: color-mix(in oklch, var(--rs-primary) 92%, black 4%);
  }
  .hero__tag {
    margin: 0;
    max-width: 60ch;
    font-size: var(--step-1);
    line-height: 1.65;
    color: color-mix(in oklch, var(--rs-text) 88%, white 12%);
  }

  .hero__cta { display: flex; gap: .6rem; margin-top: 3rem; flex-wrap: wrap; justify-content: center ; }

  .hero__meta {
    margin: clamp(1.1rem, 1.2rem + 1vw, 1.8rem) 0 0;
    padding: 0;
    list-style: none;
    display: grid;
    gap: .45rem;
    font-size: var(--step--1);
    color: color-mix(in oklch, var(--rs-text) 80%, white 8%);
  }
  .hero__meta li { display: flex; align-items: center; gap: .4rem; }
  .hero__meta li::before {
    content: "";
    width: 10px;
    height: 10px;
    border-radius: 999px;
    background: color-mix(in oklch, var(--rs-accent) 45%, white 20%);
    box-shadow: 0 0 0 1px color-mix(in oklch, var(--rs-accent) 28%, transparent);
  }

  .hero__media {
    position: relative;
    min-height: clamp(220px, 32vw, 360px);
    border-radius: clamp(16px, 4vw, 26px);
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(12, 48, 32, 0.18);
    isolation: isolate;
  }
  .hero__media::before,
  .hero__media::after {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
  }
  .hero__media::before {
    background-image: var(--hero-image);
    background-size: cover;
    background-position: center;
    filter: saturate(1.05);
    transform-origin: 50% 10%;
    animation: sway 12s ease-in-out infinite;
    z-index: 0;
  }
  .hero__media::after {
    background: linear-gradient(155deg, rgba(255,255,255,0.28) 0%, rgba(255,255,255,0.04) 45%, rgba(5,24,16,0.45) 100%);
    mix-blend-mode: multiply;
    z-index: 1;
  }
  .dark .hero__media::after {
    background: linear-gradient(150deg, rgba(3,12,9,0.68) 0%, rgba(5,16,11,0.44) 42%, rgba(2,6,5,0.82) 100%);
    mix-blend-mode: normal;
  }

  @keyframes sway {
    0%, 100% { transform: scale(1.01) rotate(0deg); }
    50% { transform: scale(1.03) rotate(.35deg); }
  }

  @media (prefers-reduced-motion: reduce) {
    .hero__media::before { animation: none; transform: none; }
  }

  /* Split sections */
  .section + .section {
    position: relative;
  }
  .section + .section::before {
    content: "";
    position: absolute;
    inset-inline: 0;
    top: -1.25rem;
    height: 1px;
    background: linear-gradient(90deg, transparent, color-mix(in oklch, var(--rs-primary) 18%, white), transparent);
    opacity: .6;
  }

  .split {
    display: grid;
    gap: clamp(1rem, 3vw, 2rem);
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
  }
  .split__col { display: grid; gap: clamp(.85rem, 1vw, 1.35rem); }
  .split--flip .split__col:first-child { order: 2; }
  .split--flip .split__col:last-child { order: 1; }
  @media (max-width: 900px) {
    .split { grid-template-columns: 1fr; }
    .split--flip .split__col { order: initial; }
  }

  .section__lede {
    margin: 0;
    font-size: var(--step-1);
    line-height: 1.7;
    color: color-mix(in oklch, var(--rs-text) 82%, white 12%);
  }

  .feature-list,
  .reason-list,
  .contact-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: clamp(.6rem, 1vw, .9rem);
  }

  .feature-list li {
    padding: clamp(.85rem, 1vw, 1.15rem) clamp(1rem, 1.2vw, 1.4rem);
    border-radius: var(--rs-radius);
    border: 1px solid color-mix(in oklch, var(--rs-border) 70%, transparent);
    background: color-mix(in oklch, var(--rs-surface) 90%, var(--rs-accent) 6%);
    box-shadow: 0 14px 24px rgba(11, 61, 46, 0.06);
    display: grid;
    gap: .25rem;
  }
  .feature-list h3 {
    margin: 0;
    font-size: clamp(1.2rem, .9rem + 1vw, 1.5rem);
    color: color-mix(in oklch, var(--rs-primary) 92%, black 6%);
  }
  .feature-list p {
    margin: 0;
    color: color-mix(in oklch, var(--rs-muted) 95%, white 5%);
  }

  .reason-list li,
  .contact-list li {
    position: relative;
    padding-left: 1.5rem;
    color: color-mix(in oklch, var(--rs-text) 88%, white 6%);
  }
  .reason-list li::before,
  .contact-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: .55em;
    width: 10px;
    height: 10px;
    border-radius: 999px;
    background: color-mix(in oklch, var(--rs-accent) 55%, white 15%);
    box-shadow: 0 0 0 1px color-mix(in oklch, var(--rs-accent) 26%, transparent);
  }

  .contact-links {
    display: flex;
    flex-wrap: wrap;
    gap: .65rem;
  }

  .icon {
    width: 1.15em;
    height: 1.15em;
    margin-right: .4rem;
    vertical-align: -.15em;
    opacity: .9;
  }

  .feature-list__heading {
    display: flex;
    align-items: center;
    gap: .5rem;
  }
  .feature-list__heading .icon {
    margin-right: 0;
    flex-shrink: 0;
  }

  .split__media {
    position: relative;
    min-height: clamp(240px, 32vw, 360px);
    border-radius: clamp(16px, 4vw, 26px);
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(12, 48, 32, 0.16);
    background: color-mix(in oklch, var(--rs-surface) 94%, var(--rs-accent) 6%);
  }
  .split__media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transform-origin: 50% 20%;
    animation: sway 16s ease-in-out infinite;
  }
  .split__media::after {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    background: linear-gradient(150deg, rgba(255,255,255,0.4) 0%, rgba(255,255,255,0.05) 40%, rgba(10,40,28,0.38) 100%);
    mix-blend-mode: multiply;
  }
  .split__media .split__media-content {
    position: absolute;
    inset: auto clamp(1.1rem, 1.5vw, 1.5rem) clamp(1.1rem, 1.5vw, 1.5rem) clamp(1.1rem, 1.5vw, 1.5rem);
    display: grid;
    gap: .4rem;
    color: #fff;
    text-shadow: 0 8px 22px rgba(0,0,0,.35);
  }
  .split__media .split__media-content h3 { margin: 0; font-size: clamp(1.2rem, .9rem + 1vw, 1.5rem); }
  .split__media .split__media-content p { margin: 0; font-size: var(--step--1); }

  .cta-card {
    position: relative;
    display: grid;
    gap: clamp(1rem, 1.5vw, 1.4rem);
    padding: clamp(1.4rem, 1.8vw, 2rem);
    border-radius: var(--rs-radius);
    border: 1px solid color-mix(in oklch, var(--rs-border) 65%, transparent);
    background: linear-gradient(160deg, color-mix(in oklch, var(--rs-surface) 92%, var(--rs-accent) 8%) 0%, color-mix(in oklch, var(--rs-surface) 80%, var(--rs-accent) 14%) 100%);
    box-shadow: 0 18px 40px rgba(12, 48, 32, 0.18);
    overflow: hidden;
    height: 100%;
  }
  .cta-card::before {
    content: "";
    position: absolute;
    inset: -40% 50% auto -30%;
    height: 120%;
    border-radius: 999px;
    background: radial-gradient(closest-side, color-mix(in oklch, var(--rs-accent-2) 40%, white) 0%, transparent 70%);
    opacity: .35;
    filter: blur(0.5px);
    pointer-events: none;
  }
  .cta-card__body { position: relative; display: grid; gap: .75rem; }
  .cta-card__body h3 { margin: 0; font-size: clamp(1.3rem, 1rem + 1vw, 1.6rem); color: color-mix(in oklch, var(--rs-primary) 90%, black 8%); }
  .cta-card__body p { margin: 0; color: color-mix(in oklch, var(--rs-text) 85%, white 8%); }
  .cta-card__body ul { list-style: none; margin: 0; padding: 0; display: grid; gap: .35rem; font-size: var(--step--1); color: color-mix(in oklch, var(--rs-text) 78%, white 10%); }
  .cta-card__footer {
    position: relative;
    display: flex;
    justify-content: space-between;
    gap: .75rem;
    flex-wrap: wrap;
    font-size: var(--step--1);
    color: color-mix(in oklch, var(--rs-muted) 95%, white 5%);
    border-top: 1px solid color-mix(in oklch, var(--rs-border) 70%, transparent);
    padding-top: .9rem;
  }

  /* Pill buttons + ripple */
  .btn-pill { border-radius: 999px; }
  .btn-pill.btn { padding: .72rem 1.3rem; }

  .btn-grow {
    position: relative;
    isolation: isolate;
    overflow: hidden;
  }
  .btn-grow::after {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    pointer-events: none;
    background: radial-gradient(60% 90% at 50% 100%, color-mix(in oklch, var(--amber-deep) 24%, transparent), transparent 70%);
    opacity: 0;
    transition: opacity var(--rs-speed) var(--rs-ease);
    z-index: -1;
  }
  .btn-grow:hover::after { opacity: .7; }

  /* Project listing */
  .project-header {
    display: grid;
    gap: .75rem;
    margin-bottom: clamp(1.5rem, 2vw, 2.5rem);
  }
  .project-intro {
    margin: 0;
    font-size: var(--step-0);
    color: color-mix(in oklch, var(--rs-text) 82%, white 10%);
  }

  .project-feature {
    position: relative;
    border-radius: var(--rs-radius);
    overflow: hidden;
    margin-bottom: clamp(2rem, 3vw, 3rem);
    min-height: clamp(240px, 32vw, 360px);
    box-shadow: 0 26px 46px rgba(10, 40, 28, 0.28);
  }
  .project-feature__inner {
    position: relative;
    min-height: inherit;
    display: flex;
    align-items: center;
  }
  .project-feature__bg {
    position: absolute;
    inset: 0;
    background:
      linear-gradient(180deg, color-mix(in oklch, var(--rs-primary) 35%, transparent), rgba(0,0,0,0.25)),
      var(--feature-image, linear-gradient(120deg, color-mix(in oklch, var(--rs-primary) 12%, black), color-mix(in oklch, var(--rs-accent) 16%, black)));
    background-size: cover;
    background-position: center;
    filter: saturate(1.05);
    opacity: .92;
  }
  .project-feature__content {
    position: relative;
    padding: clamp(1.5rem, 3vw, 2.75rem);
    color: #fff;
    display: grid;
    gap: clamp(.65rem, 1.2vw, 1.2rem);
    max-width: min(600px, 90%);
  }
  .project-feature__eyebrow {
    margin: 0;
    font-size: var(--step--1);
    text-transform: uppercase;
    letter-spacing: .16em;
    font-weight: 700;
    color: rgba(255,255,255,.78);
  }
  .project-feature__title {
    margin: 0;
    font-size: clamp(2rem, 1.4rem + 3vw, 3rem);
    color: rgba(255,255,255,.96);
  }
  .project-feature__summary {
    margin: 0;
    font-size: clamp(1.05rem, .95rem + .6vw, 1.3rem);
    line-height: 1.65;
    color: rgba(255,255,255,.88);
  }

  .project-section .section-title {
    margin-bottom: clamp(1rem, 2vw, 1.5rem);
  }

  .project-grid {
    display: grid;
    gap: clamp(1rem, 2vw, 1.5rem);
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  }

  .project-card {
    position: relative;
    border-radius: 24px;
    overflow: hidden;
    min-height: 100%;
    transition: transform var(--rs-speed) var(--rs-ease), box-shadow var(--rs-speed) var(--rs-ease);
    box-shadow: 0 18px 46px rgba(11, 61, 46, 0.16);
  }
  .project-card a {
    display: block;
    height: 100%;
    color: inherit;
    text-decoration: none;
  }
  .project-card:hover { transform: translateY(-4px); }
  .project-card:focus-within { outline: 2px solid color-mix(in oklch, var(--rs-accent) 40%, white); outline-offset: 4px; }

  .project-card__image {
    aspect-ratio: 16 / 10;
    background: var(--rs-border);
    background-image: var(--img);
    background-size: cover;
    background-position: center;
    filter: saturate(1.05);
  }
  .project-card__glass {
    position: absolute;
    inset: auto .85rem .85rem .85rem;
    padding: clamp(1rem, 1.2vw, 1.3rem);
    backdrop-filter: blur(10px);
    background: color-mix(in oklch, var(--rs-surface) 70%, white 30%);
    border: 1px solid color-mix(in oklch, var(--rs-border) 60%, white 20%);
    border-radius: 16px;
    box-shadow: var(--rs-shadow);
    display: grid;
    gap: .65rem;
  }
  .project-card__badges { display: flex; flex-wrap: wrap; gap: .35rem; }
  .project-card__title {
    margin: 0;
    font-size: clamp(1.1rem, 1rem + .75vw, 1.5rem);
    color: color-mix(in oklch, var(--rs-primary) 92%, black 6%);
  }
  .project-card__excerpt {
    margin: 0;
    font-size: var(--step--1);
    color: color-mix(in oklch, var(--rs-text) 82%, white 8%);
  }
  .project-card__meta {
    margin: 0;
    font-size: var(--step--1);
    color: color-mix(in oklch, var(--rs-muted) 85%, white 6%);
  }
  .project-card__cta {
    display: inline-flex;
    align-items: center;
    gap: .3rem;
    font-weight: 600;
    font-size: var(--step--1);
    color: color-mix(in oklch, var(--rs-accent) 80%, white 10%);
  }
  .project-card__cta::after {
    content: '→';
    transition: transform var(--rs-speed) var(--rs-ease);
  }
  .project-card:hover .project-card__cta::after { transform: translateX(3px); }

  @media (prefers-reduced-motion: reduce) {
    .project-card { transition: none; }
    .project-card:hover { transform: none; }
    .project-card__cta::after { transition: none; }
  }

  .project-overview {
    margin: clamp(2rem, 4vw, 3.5rem) auto;
    gap: clamp(1.25rem, 2vw, 2rem);
  }
  .project-overview .split__col:first-child { display: grid; gap: clamp(.85rem, 1.2vw, 1.4rem); }
  .project-overview__media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: clamp(16px, 3vw, 22px);
  }
  .highlight-list {
    list-style: none;
    padding: 0;
    margin: .75rem 0 0;
    display: grid;
    gap: .45rem;
  }
  .highlight-list li {
    padding: .45rem .75rem;
    border: 1px solid var(--rs-border);
    border-radius: var(--rs-radius-sm);
    background: color-mix(in oklch, var(--rs-surface) 92%, white 6%);
    font-size: var(--step-0);
    line-height: 1.6;
  }
  .highlight-list strong { color: color-mix(in oklch, var(--rs-primary) 88%, black 6%); }

  .mini-toc {
    position: sticky;
    top: clamp(4.75rem, 5vw, 6rem);
    z-index: 10;
    margin-bottom: clamp(1.5rem, 2.4vw, 2.75rem);
    border-radius: 999px;
    padding: .1rem;
    border: 1px solid color-mix(in oklch, var(--rs-border) 70%, white 10%);
    background: color-mix(in oklch, var(--rs-surface) 80%, var(--sun-amber) 10%);
    box-shadow: 0 18px 34px rgba(12, 48, 32, 0.12);
  }
  @media (max-width: 780px) {
    .mini-toc {
      position: static;
      border-radius: var(--rs-radius);
    }
  }
  .mini-toc__summary {
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: .65rem;
    cursor: pointer;
    padding: .55rem .85rem;
    border-radius: inherit;
    font-weight: 600;
    color: color-mix(in oklch, var(--rs-primary) 78%, black 8%);
  }
  .mini-toc__summary::-webkit-details-marker,
  .mini-toc__summary::marker {
    display: none;
    content: "";
  }
  .mini-toc__label {
    font-size: var(--step--1);
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: color-mix(in oklch, var(--rs-primary) 78%, black 8%);
  }
  .mini-toc__chevron {
    width: .85rem;
    height: .85rem;
    border-radius: 999px;
    position: relative;
  }
  .mini-toc__chevron::before,
  .mini-toc__chevron::after {
    content: "";
    position: absolute;
    left: 50%;
    top: 50%;
    width: .5rem;
    height: 1px;
    background: color-mix(in oklch, var(--rs-primary) 72%, black 12%);
    transition: transform var(--rs-speed) var(--rs-ease);
  }
  .mini-toc__chevron::before { transform: translate(-50%, -50%) rotate(45deg); }
  .mini-toc__chevron::after { transform: translate(-50%, -50%) rotate(-45deg); }
  .mini-toc:not([open]) .mini-toc__chevron::before { transform: translate(-50%, -50%) rotate(135deg); }
  .mini-toc:not([open]) .mini-toc__chevron::after { transform: translate(-50%, -50%) rotate(-135deg); }
  .mini-toc__list {
    list-style: none;
    margin: 0;
    padding: 0 0 .6rem .2rem;
    display: flex;
    flex-wrap: wrap;
    gap: .45rem;
  }
  .mini-toc[open] .mini-toc__list { margin-top: .25rem; }
  .mini-toc:not([open]) .mini-toc__list { padding: 0; }
  .mini-toc__item a {
    display: inline-flex;
    align-items: center;
    gap: .35rem;
    padding: .4rem .85rem;
    border-radius: 999px;
    font-size: var(--step--1);
    font-weight: 600;
    color: color-mix(in oklch, var(--rs-primary) 80%, black 8%);
    background: color-mix(in oklch, var(--rs-surface) 84%, white 8%);
    border: 1px solid color-mix(in oklch, var(--rs-border) 70%, white 12%);
    transition: color var(--rs-speed) var(--rs-ease), background var(--rs-speed) var(--rs-ease), box-shadow var(--rs-speed) var(--rs-ease);
  }
  .mini-toc__item--level-3 a {
    font-size: var(--step--1);
    padding-inline: .7rem;
    background: color-mix(in oklch, var(--rs-surface) 88%, white 12%);
  }
  .mini-toc__item a:hover,
  .mini-toc__item a:focus-visible {
    color: color-mix(in oklch, var(--rs-accent) 80%, black 6%);
    background: color-mix(in oklch, var(--sun-amber) 35%, white 65%);
    box-shadow: 0 12px 22px rgba(11, 61, 46, 0.14);
    outline: none;
  }

  /* Lab notes */
  .notes-section { padding-top: clamp(2rem, 3vw, 3rem); }
  .notes-intro {
    margin: 0 0 clamp(1.4rem, 2.5vw, 2rem);
    font-size: var(--step-0);
    color: color-mix(in oklch, var(--rs-text) 80%, white 15%);
    max-width: 68ch;
  }
  .notes-grid {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: clamp(1rem, 2.5vw, 1.65rem);
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  }
  .note-card {
    position: relative;
    padding: clamp(1.1rem, 1.5vw, 1.4rem) clamp(1.1rem, 1.5vw, 1.5rem) clamp(1.35rem, 1.8vw, 1.7rem);
    border-radius: var(--rs-radius);
    box-shadow: 0 18px 34px rgba(12, 48, 32, 0.14);
    transition: transform var(--rs-speed) var(--rs-ease), box-shadow var(--rs-speed) var(--rs-ease);
  }
  .note-card__link {
    display: grid;
    gap: .6rem;
    color: inherit;
    text-decoration: none;
    min-height: 100%;
  }
  .note-card__link:focus-visible {
    outline: 2px solid color-mix(in oklch, var(--rs-accent) 42%, white);
    outline-offset: 4px;
  }
  .note-card:hover { transform: translateY(-4px); }
  .note-card:hover .note-card__link { color: inherit; }
  .note-card__pin {
    position: absolute;
    top: .75rem;
    right: .95rem;
    font-size: 1.35rem;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,.18));
    pointer-events: none;
  }
  .note-card__title {
    margin: .2rem 0 0;
    font-size: clamp(1.1rem, 1rem + .6vw, 1.45rem);
    color: color-mix(in oklch, var(--rs-primary) 90%, black 6%);
  }
  .note-card__meta {
    margin: 0;
    font-size: var(--step--1);
    letter-spacing: .01em;
    color: color-mix(in oklch, var(--rs-muted) 92%, white 8%);
  }
  .note-card__excerpt {
    margin: 0;
    font-size: var(--step-0);
    line-height: 1.6;
    color: color-mix(in oklch, var(--rs-text) 88%, white 8%);
  }
  .note-card__tags {
    display: flex;
    flex-wrap: wrap;
    gap: .45rem;
  }
  .chip {
    display: inline-flex;
    align-items: center;
    gap: .35rem;
    padding: .3rem .65rem;
    border-radius: 999px;
    font-size: var(--step--1);
    font-weight: 600;
    background: color-mix(in oklch, var(--sun-amber) 16%, white);
    border: 1px solid color-mix(in oklch, var(--sun-amber) 32%, white);
    color: color-mix(in oklch, var(--rs-primary) 75%, black 8%);
  }
  .notes-empty {
    margin-top: 2rem;
    font-style: italic;
    color: color-mix(in oklch, var(--rs-muted) 95%, white 5%);
  }

  @media (prefers-reduced-motion: reduce) {
    .note-card { transition: none; }
    .note-card:hover { transform: none; }
  }

  /* Badges */
  .badge { display:inline-flex; align-items:center; gap:.35rem; padding:.25rem .5rem; border-radius: 999px; font-size: var(--step--1); font-weight: 600; border:1px solid var(--rs-border); background: color-mix(in oklch, var(--rs-accent) 6%, white); color: color-mix(in oklch, var(--rs-primary) 75%, black); }
  .badge--prototype { background: color-mix(in oklch, var(--rs-accent) 10%, white); border-color: color-mix(in oklch, var(--rs-accent) 28%, white); }
  .badge--inprogress { background: color-mix(in oklch, var(--rs-primary) 8%, white); border-color: color-mix(in oklch, var(--rs-primary) 24%, white); }
  .badge--open { background: color-mix(in oklch, var(--rs-accent-2) 14%, white); border-color: color-mix(in oklch, var(--rs-accent-2) 32%, white); }
  .badge + .badge { margin-left: .35rem; }

  .project-empty {
    margin-top: 1.5rem;
    font-style: italic;
    color: var(--rs-muted);
  }

  .note-list {
    list-style: none;
    padding: 0;
    margin: clamp(1.25rem, 2vw, 2rem) 0 0;
    display: grid;
    gap: .75rem;
  }

  .note-list__item {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: .45rem;
  }

  .note-list__link {
    font-weight: 600;
    color: color-mix(in oklch, var(--rs-accent) 85%, white);
    text-decoration: none;
  }

  .note-list__link:hover,
  .note-list__link:focus {
    color: var(--rs-accent);
    text-decoration: underline;
    text-decoration-thickness: 2px;
    text-underline-offset: 3px;
  }

  .note-list__meta {
    font-size: var(--step--1);
    color: var(--rs-muted);
  }

  /* VR Scene */
  .vr-wrap { height: 60dvh; min-height: 320px; }
  a-scene {
    display: block; width: 100%; height: 100%;
    background: linear-gradient(145deg, color-mix(in oklch, var(--rs-accent) 10%, white), color-mix(in oklch, var(--rs-accent) 4%, white));
    border: 1px solid var(--rs-border); border-radius: var(--rs-radius); box-shadow: var(--rs-shadow); overflow: hidden;
  }

  /* Footer */
  footer {
    background: transparent;
    color: color-mix(in oklch, var(--rs-text) 84%, white 8%);
    text-align: center;
    padding: clamp(1rem, 1.5vw, 1.4rem);
    border-top: 1px solid color-mix(in oklch, var(--rs-border) 70%, white 14%);
    box-shadow: none;
  }
  footer a { color: inherit; font-weight: 600; }
  footer a:hover { color: color-mix(in oklch, var(--rs-primary) 78%, black 8%); }
  .dark footer { color: color-mix(in oklch, white 92%, var(--sun-amber) 8%); border-top-color: color-mix(in oklch, var(--rs-border) 55%, white 28%); }
  .dark footer a:hover { color: color-mix(in oklch, white 96%, var(--sun-amber) 14%); }

  /* Buttons */
  .btn {
    --btn-bg: color-mix(in oklch, var(--rs-surface) 88%, white 12%);
    --btn-color: color-mix(in oklch, var(--rs-primary) 80%, black 8%);
    --btn-border: color-mix(in oklch, var(--rs-border) 70%, white 12%);
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    padding: .65rem 1rem;
    font-weight: 600;
    border-radius: 10px;
    border: 1px solid var(--btn-border);
    background: var(--btn-bg);
    color: var(--btn-color);
    box-shadow: var(--rs-shadow);
    transition: transform var(--rs-speed) var(--rs-ease), box-shadow var(--rs-speed) var(--rs-ease), background var(--rs-speed) var(--rs-ease), color var(--rs-speed) var(--rs-ease);
    position: relative;
    z-index: 0;
  }
  .dark .btn {
    --btn-bg: color-mix(in oklch, var(--rs-surface) 52%, white 38%);
    --btn-color: color-mix(in oklch, white 94%, var(--rs-primary) 12%);
    --btn-border: color-mix(in oklch, var(--rs-border) 48%, white 32%);
  }
  .btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 16px 32px rgba(11,61,46,0.16);
    text-decoration: none;
  }
  .btn:active { transform: translateY(0); }
  .btn-primary {
    background: linear-gradient(180deg,
      color-mix(in oklch, var(--rs-accent) 92%, black 4%) 0%,
      color-mix(in oklch, var(--rs-accent) 75%, black 12%) 100%);
    color: #fff;
    border-color: transparent;
  }
  .btn-primary:hover { filter: brightness(1.06); }
  .dark .btn-primary {
    background: linear-gradient(180deg,
      color-mix(in oklch, var(--rs-accent) 82%, white 14%) 0%,
      color-mix(in oklch, var(--rs-accent) 68%, black 8%) 100%);
    color: color-mix(in oklch, white 98%, var(--sun-amber) 6%);
  }
  .btn__icon { display: inline-flex; align-items: center; }
  .btn-grow .btn__icon { transition: transform var(--rs-speed) var(--rs-ease); }
  .btn-grow:hover .btn__icon { transform: translateX(3px); }

  /* Smarter state with :has() (no JS required) */
  .nav-item:has(> .submenu[open]) > a { background: color-mix(in oklch, var(--rs-accent) 22%, transparent); }
}

/* ======================= UTILITIES ====================== */
@layer utilities {
  .mt-2 { margin-top: .5rem; }
  .mt-4 { margin-top: 1rem; }
  .mb-4 { margin-bottom: 1rem; }
  .p-4 { padding: 1rem; }
  .rounded { border-radius: var(--rs-radius); }
  .shadow { box-shadow: var(--rs-shadow); }

  /* Scroll-driven reveal for section titles (progressive) */
  @keyframes fadeUp { from { opacity: 0; transform: translateY(8px);} to {opacity:1; transform:none;} }
  .section-title { animation: fadeUp .8s both; animation-timeline: view(); animation-range: entry 0% cover 35%; }
}

/* ======================= ACCESSIBILITY =================== */
@layer overrides {
  @media (prefers-reduced-motion: reduce) {
    * { transition: none !important; animation: none !important; }
    .hero__media::before { animation: none !important; }
    .split__media img { animation: none !important; }
  }
}