/* ================================================
   TRACIVEX / app.css
   Design system: Warm Carbon + Oxide Orange
   ================================================ */

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

/* ------------------------------------------------
   RESET
   ------------------------------------------------ */
@layer reset {
  *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
  html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
  body { min-height: 100vh; line-height: 1.5; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; text-rendering: optimizeLegibility; }
  img, picture, svg, video { display: block; max-width: 100%; }
  input, button, textarea, select { font: inherit; color: inherit; }
  button { background: none; border: none; cursor: pointer; }
  a { color: inherit; text-decoration: none; }
  ul, ol { list-style: none; }
  :focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }
}

/* ------------------------------------------------
   TOKENS — Warm Carbon + Oxide Orange
   ------------------------------------------------ */
@layer tokens {
  :root {
    /* Base surfaces — warm near-black */
    --c-base:       oklch(0.145 0.005 60);   /* #161412 */
    --c-panel:      oklch(0.185 0.006 60);   /* #1E1B18 */
    --c-elevated:   oklch(0.225 0.007 60);   /* #272320 */
    --c-raised:     oklch(0.265 0.008 60);   /* #302B27 */

    /* Text hierarchy */
    --c-text-1:     oklch(0.97 0.005 85);    /* eggshell */
    --c-text-2:     oklch(0.78 0.008 75);    /* muted */
    --c-text-3:     oklch(0.58 0.010 70);    /* dim */
    --c-text-4:     oklch(0.42 0.008 65);    /* very dim */

    /* Borders */
    --c-border:     color-mix(in oklab, white 6%, transparent);
    --c-border-strong: color-mix(in oklab, white 12%, transparent);

    /* Accent — oxide orange */
    --c-accent:     oklch(0.68 0.19 45);     /* ≈ #E97B33 */
    --c-accent-hi:  oklch(0.76 0.19 50);     /* hover/bright */
    --c-accent-dim: oklch(0.68 0.19 45 / 0.12);

    /* Product-specific accents (used sparingly) */
    --c-sight:      oklch(0.68 0.15 240);    /* blue */
    --c-lite:       oklch(0.68 0.17 295);    /* purple */
    --c-talon:      oklch(0.72 0.16 155);    /* green */
    --c-cipher:     oklch(0.78 0.16 85);     /* amber */
    --c-dcd:        oklch(0.68 0.14 270);    /* indigo */
    --c-blackbox:   oklch(0.70 0.15 55);     /* warm amber */

    /* Typography */
    --ff-sans: 'Inter Tight', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --ff-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;
    --ff-display: 'Inter Tight', -apple-system, BlinkMacSystemFont, sans-serif;

    /* Font features — escape the Inter default look */
    --ff-features: "ss01", "ss02", "cv11", "calt";

    /* Scale — fluid via clamp */
    --fs-micro:   0.6875rem;                             /* 11 */
    --fs-small:   0.8125rem;                             /* 13 */
    --fs-body:    0.9375rem;                             /* 15 */
    --fs-lead:    clamp(1rem, 0.94rem + 0.3vw, 1.125rem); /* 16-18 */
    --fs-h3:      clamp(1.25rem, 1.1rem + 0.75vw, 1.5rem);
    --fs-h2:      clamp(1.625rem, 1.4rem + 1.15vw, 2.25rem);
    --fs-h1:      clamp(2rem, 1.7rem + 1.5vw, 2.75rem);
    --fs-display: clamp(2.75rem, 2rem + 4vw, 5.25rem);
    --fs-mega:    clamp(3.5rem, 2.5rem + 5.5vw, 7rem);

    /* Spacing — 8px base */
    --sp-1: 4px;
    --sp-2: 8px;
    --sp-3: 12px;
    --sp-4: 16px;
    --sp-5: 20px;
    --sp-6: 24px;
    --sp-7: 32px;
    --sp-8: 40px;
    --sp-9: 48px;
    --sp-10: 64px;
    --sp-11: 80px;
    --sp-12: 96px;
    --sp-13: 120px;
    --sp-14: 160px;

    /* Layout */
    --container: 1200px;
    --container-reading: 720px;
    --container-content: 880px;
    --gutter: clamp(20px, 4vw, 40px);
    --section-y: clamp(96px, 8vw, 160px);

    /* Motion */
    --ease-out:      cubic-bezier(0.22, 1, 0.36, 1);
    --ease-standard: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-spring:   cubic-bezier(0.32, 0.72, 0, 1);
    --dur-fast: 120ms;
    --dur-base: 220ms;
    --dur-slow: 480ms;

    /* Radii */
    --r-sm: 6px;
    --r-md: 10px;
    --r-lg: 14px;
    --r-xl: 20px;

    /* Shadows — used very sparingly */
    --shadow-elev: 0 30px 80px -30px rgba(0,0,0,0.6);
  }

  /* P3 wide-gamut promotion */
  @supports (color: color(display-p3 1 0 0)) {
    :root {
      --c-accent:    color(display-p3 0.92 0.50 0.22);
      --c-accent-hi: color(display-p3 0.98 0.62 0.32);
    }
  }

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

/* ------------------------------------------------
   BASE
   ------------------------------------------------ */
@layer base {
  html {
    color-scheme: dark;
    scroll-behavior: smooth;
    background: var(--c-base);
  }

  body {
    background: var(--c-base);
    color: var(--c-text-2);
    font-family: var(--ff-sans);
    font-size: var(--fs-body);
    font-feature-settings: var(--ff-features);
    letter-spacing: -0.006em;
    line-height: 1.6;
    overflow-x: hidden;
    font-variant-numeric: oldstyle-nums proportional-nums;
  }

  /* Paper grain — the one texture */
  body::before {
    content: '';
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    opacity: 0.035;
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0.6 0'/></filter><rect width='200' height='200' filter='url(%23n)'/></svg>");
    mix-blend-mode: overlay;
  }

  h1, h2, h3, h4, h5 {
    font-family: var(--ff-display);
    color: var(--c-text-1);
    font-weight: 500;
    line-height: 1.08;
    letter-spacing: -0.025em;
  }
  h1 { font-size: var(--fs-h1); }
  h2 { font-size: var(--fs-h2); letter-spacing: -0.022em; }
  h3 { font-size: var(--fs-h3); letter-spacing: -0.018em; }
  h4 { font-size: var(--fs-lead); letter-spacing: -0.012em; }

  p { line-height: 1.65; }

  a {
    color: var(--c-text-1);
    transition: color var(--dur-fast) var(--ease-standard);
  }

  strong { color: var(--c-text-1); font-weight: 500; }

  ::selection {
    background: var(--c-accent);
    color: var(--c-base);
  }
}

/* ------------------------------------------------
   LAYOUT
   ------------------------------------------------ */
@layer layout {
  .container {
    width: 100%;
    max-width: var(--container);
    margin-inline: auto;
    padding-inline: var(--gutter);
  }
  .container-narrow {
    max-width: var(--container-content);
    margin-inline: auto;
    padding-inline: var(--gutter);
  }
  .container-reading {
    max-width: var(--container-reading);
    margin-inline: auto;
    padding-inline: var(--gutter);
  }

  section { padding-block: var(--section-y); position: relative; }

  main { position: relative; z-index: 1; }
}

/* ------------------------------------------------
   COMPONENTS — NAV
   ------------------------------------------------ */
@layer components {
  .site-nav {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 100;
    height: 64px;
    display: flex;
    align-items: center;
    transition: background var(--dur-base) var(--ease-standard),
                border-color var(--dur-base) var(--ease-standard);
    border-bottom: 1px solid transparent;
  }
  .site-nav.is-scrolled {
    background: color-mix(in oklab, var(--c-base) 72%, transparent);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    backdrop-filter: blur(20px) saturate(180%);
    border-bottom-color: var(--c-border);
  }
  .nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    max-width: var(--container);
    margin-inline: auto;
    padding-inline: var(--gutter);
  }
  .nav-brand {
    display: inline-flex;
    align-items: baseline;
    gap: 10px;
    font-family: var(--ff-mono);
    font-size: var(--fs-small);
    letter-spacing: 0.06em;
    color: var(--c-text-1);
    text-transform: uppercase;
    font-weight: 500;
  }
  .nav-brand .brand-dot {
    width: 7px; height: 7px;
    background: var(--c-accent);
    border-radius: 1px;
    display: inline-block;
    transform: translateY(-1px);
  }
  .nav-links {
    display: flex;
    align-items: center;
    gap: clamp(20px, 3vw, 36px);
  }
  .nav-links a {
    font-family: var(--ff-mono);
    font-size: var(--fs-small);
    color: var(--c-text-2);
    letter-spacing: 0.02em;
  }
  .nav-links a:hover { color: var(--c-text-1); }
  .nav-links a[aria-current="page"] { color: var(--c-text-1); }
  .nav-toggle {
    display: none;
    color: var(--c-text-1);
    padding: 8px;
  }

  /* ------------------------------------------------
     HERO — minimal text + anchor
     ------------------------------------------------ */
  .hero {
    min-height: 70svh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding-block: calc(var(--section-y) + 40px) var(--section-y);
    position: relative;
  }

  .hero-eyebrow {
    font-family: var(--ff-mono);
    font-size: var(--fs-micro);
    color: var(--c-text-3);
    text-transform: uppercase;
    letter-spacing: 0.14em;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-bottom: var(--sp-7);
  }
  .hero-eyebrow::before {
    content: '';
    width: 24px;
    height: 1px;
    background: var(--c-text-4);
  }

  .hero-title {
    font-size: var(--fs-display);
    font-weight: 500;
    line-height: 1.02;
    letter-spacing: -0.032em;
    color: var(--c-text-1);
    max-width: 14ch;
    margin-bottom: var(--sp-6);
  }
  .hero-title .accent { color: var(--c-accent); }

  .hero-lead {
    font-size: var(--fs-lead);
    color: var(--c-text-2);
    max-width: 52ch;
    line-height: 1.55;
    margin-bottom: var(--sp-9);
  }

  .hero-ctas {
    display: flex;
    flex-wrap: wrap;
    gap: var(--sp-6) var(--sp-8);
    align-items: center;
  }

  /* ------------------------------------------------
     LINKS — primary chevron style
     ------------------------------------------------ */
  .link-primary {
    display: inline-flex;
    align-items: baseline;
    gap: 10px;
    color: var(--c-text-1);
    font-family: var(--ff-mono);
    font-size: var(--fs-small);
    letter-spacing: 0.02em;
    transition: color var(--dur-fast) var(--ease-standard);
  }
  .link-primary .chev {
    transition: transform var(--dur-base) var(--ease-out);
    color: var(--c-accent);
  }
  .link-primary:hover { color: var(--c-text-1); }
  .link-primary:hover .chev { transform: translateX(4px); }

  .link-secondary {
    display: inline-flex;
    align-items: baseline;
    gap: 10px;
    color: var(--c-text-2);
    font-family: var(--ff-mono);
    font-size: var(--fs-small);
    letter-spacing: 0.02em;
  }
  .link-secondary:hover { color: var(--c-text-1); }

  .btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 11px 20px;
    font-family: var(--ff-mono);
    font-size: var(--fs-small);
    letter-spacing: 0.02em;
    color: var(--c-text-1);
    border: 1px solid var(--c-border-strong);
    border-radius: var(--r-sm);
    background: transparent;
    transition: all var(--dur-base) var(--ease-standard);
  }
  .btn:hover {
    border-color: var(--c-accent);
    color: var(--c-accent-hi);
  }
  .btn-primary {
    background: var(--c-accent);
    color: var(--c-base);
    border-color: var(--c-accent);
  }
  .btn-primary:hover {
    background: var(--c-accent-hi);
    color: var(--c-base);
  }

  /* ------------------------------------------------
     SECTION HEADER — editorial, with hex offset
     ------------------------------------------------ */
  .sec-head {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: var(--sp-8);
    margin-bottom: var(--sp-11);
    align-items: start;
  }
  .sec-offset {
    font-family: var(--ff-mono);
    font-size: var(--fs-micro);
    color: var(--c-text-4);
    letter-spacing: 0.08em;
    padding-top: 8px;
    display: flex;
    align-items: baseline;
    gap: 10px;
  }
  .sec-offset::before {
    content: '';
    width: 16px;
    height: 1px;
    background: var(--c-text-4);
    transform: translateY(-3px);
  }
  .sec-body { max-width: 640px; }
  .sec-body h2 {
    font-size: var(--fs-h2);
    font-weight: 500;
    letter-spacing: -0.022em;
    line-height: 1.1;
    margin-bottom: var(--sp-4);
  }
  .sec-body .sec-lead {
    font-size: var(--fs-lead);
    color: var(--c-text-2);
    line-height: 1.55;
  }

  /* ------------------------------------------------
     PRODUCT LIST — editorial, not grid
     ------------------------------------------------ */
  .product-list {
    display: flex;
    flex-direction: column;
  }
  .product-row {
    display: grid;
    grid-template-columns: 120px 1fr auto;
    gap: var(--sp-8);
    padding-block: var(--sp-9);
    border-top: 1px solid var(--c-border);
    align-items: start;
    transition: background var(--dur-base) var(--ease-standard);
  }
  .product-row:last-child { border-bottom: 1px solid var(--c-border); }
  .product-row:hover { background: color-mix(in oklab, var(--c-panel) 40%, transparent); }

  .product-index {
    font-family: var(--ff-mono);
    font-size: var(--fs-micro);
    color: var(--c-text-4);
    letter-spacing: 0.08em;
    padding-top: 6px;
    line-height: 1.4;
  }
  .product-index .hex { display: block; }
  .product-index .status {
    color: var(--c-text-3);
    margin-top: 6px;
    display: block;
  }
  .product-index .status.live { color: var(--c-accent); }

  .product-body h3 {
    font-size: var(--fs-h2);
    font-weight: 500;
    letter-spacing: -0.02em;
    line-height: 1.1;
    margin-bottom: var(--sp-3);
  }
  .product-body h3 a:hover { color: var(--c-accent-hi); }
  .product-body .product-kicker {
    font-family: var(--ff-mono);
    font-size: var(--fs-small);
    color: var(--c-text-3);
    margin-bottom: var(--sp-4);
    letter-spacing: 0.02em;
  }
  .product-body p {
    font-size: var(--fs-body);
    color: var(--c-text-2);
    max-width: 56ch;
    margin-bottom: var(--sp-5);
    line-height: 1.65;
  }

  /* Inline edition preview — small phone screenshot beside description */
  .product-body.has-preview {
    display: grid;
    grid-template-columns: 1fr 180px;
    gap: var(--sp-8);
    align-items: start;
  }
  .product-body.has-preview .preview-text { min-width: 0; }
  .edition-preview {
    display: block;
    width: 180px;
    aspect-ratio: 9 / 19.5;
    object-fit: cover;
    object-position: top;
    border-radius: 22px;
    border: 1px solid var(--c-border-strong);
    background: var(--c-panel);
    box-shadow: 0 20px 50px -15px rgba(0,0,0,0.5), 0 0 0 1px color-mix(in oklab, white 5%, transparent);
    transition: transform var(--dur-base) var(--ease-out);
  }
  .product-row:hover .edition-preview { transform: translateY(-2px); }
  @media (max-width: 900px) {
    .product-body.has-preview { grid-template-columns: 1fr; gap: var(--sp-5); }
    .edition-preview { width: 140px; margin: 0; }
  }

  .product-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--sp-5);
    font-family: var(--ff-mono);
    font-size: var(--fs-micro);
    color: var(--c-text-3);
    letter-spacing: 0.04em;
    text-transform: uppercase;
  }
  .product-meta span { display: inline-flex; align-items: center; gap: 6px; }
  .product-meta span::before {
    content: '';
    width: 5px;
    height: 5px;
    background: var(--c-text-4);
    border-radius: 50%;
  }

  .product-action {
    padding-top: 6px;
    min-width: 120px;
    text-align: right;
  }

  /* ------------------------------------------------
     ASCII DIVIDER
     ------------------------------------------------ */
  .ascii-divider {
    font-family: var(--ff-mono);
    font-size: var(--fs-micro);
    color: var(--c-text-4);
    letter-spacing: 0.12em;
    text-align: center;
    padding-block: var(--sp-9);
    user-select: none;
  }

  /* ------------------------------------------------
     JOURNAL
     ------------------------------------------------ */
  .journal-list { display: flex; flex-direction: column; }
  .journal-item {
    display: grid;
    grid-template-columns: 120px 1fr auto;
    gap: var(--sp-8);
    padding-block: var(--sp-6);
    border-top: 1px solid var(--c-border);
    align-items: baseline;
  }
  .journal-item:last-child { border-bottom: 1px solid var(--c-border); }
  .journal-date {
    font-family: var(--ff-mono);
    font-size: var(--fs-micro);
    color: var(--c-text-4);
    letter-spacing: 0.06em;
  }
  .journal-title {
    font-size: var(--fs-lead);
    color: var(--c-text-1);
    font-weight: 500;
    letter-spacing: -0.012em;
  }
  .journal-tag {
    font-family: var(--ff-mono);
    font-size: var(--fs-micro);
    color: var(--c-text-3);
    letter-spacing: 0.06em;
    text-transform: uppercase;
  }
  .journal-tag.live {
    color: var(--c-accent-hi);
  }

  /* ------------------------------------------------
     COLOPHON / ABOUT BLOCK
     ------------------------------------------------ */
  .colophon {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: var(--sp-8);
    padding-block: var(--sp-11);
    border-top: 1px solid var(--c-border);
  }
  .colophon-label {
    font-family: var(--ff-mono);
    font-size: var(--fs-micro);
    color: var(--c-text-4);
    letter-spacing: 0.08em;
  }
  .colophon p {
    max-width: 56ch;
    color: var(--c-text-2);
    font-size: var(--fs-body);
    line-height: 1.7;
    margin-bottom: var(--sp-4);
  }
  .colophon p:last-child { margin-bottom: 0; }
  .colophon .sig {
    font-family: var(--ff-mono);
    color: var(--c-text-3);
    font-size: var(--fs-small);
  }

  /* ------------------------------------------------
     FOOTER
     ------------------------------------------------ */
  .site-footer {
    border-top: 1px solid var(--c-border);
    padding-block: var(--sp-9) var(--sp-7);
    margin-top: var(--sp-10);
  }
  .footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--sp-8);
    margin-bottom: var(--sp-9);
  }
  .footer-col h5 {
    font-family: var(--ff-mono);
    font-size: var(--fs-micro);
    color: var(--c-text-4);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--sp-5);
    font-weight: 500;
  }
  .footer-col ul { display: flex; flex-direction: column; gap: 10px; }
  .footer-col ul li a {
    font-size: var(--fs-small);
    color: var(--c-text-2);
  }
  .footer-col ul li a:hover { color: var(--c-text-1); }
  .footer-brand p {
    font-size: var(--fs-small);
    color: var(--c-text-3);
    max-width: 36ch;
    line-height: 1.6;
    margin-top: var(--sp-4);
  }
  .footer-meta {
    border-top: 1px solid var(--c-border);
    padding-top: var(--sp-5);
    display: flex;
    flex-wrap: wrap;
    gap: var(--sp-6) var(--sp-8);
    font-family: var(--ff-mono);
    font-size: var(--fs-micro);
    color: var(--c-text-4);
    letter-spacing: 0.04em;
  }
  .footer-meta span { display: inline-flex; align-items: center; gap: 6px; }
  .footer-meta .pulse {
    width: 6px; height: 6px; border-radius: 50%;
    background: var(--c-accent);
    display: inline-block;
    animation: pulse 2s ease-in-out infinite;
  }
  @keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
  }

  /* ------------------------------------------------
     PRODUCT PAGE CHROME
     ------------------------------------------------ */
  .pg-hero {
    padding-block: calc(var(--section-y) + 40px) var(--section-y);
    position: relative;
  }
  .pg-meta-bar {
    display: flex;
    flex-wrap: wrap;
    gap: var(--sp-8);
    padding-block: var(--sp-4) 0;
    border-top: 1px solid var(--c-border);
    margin-top: var(--sp-9);
    font-family: var(--ff-mono);
    font-size: var(--fs-micro);
    color: var(--c-text-4);
    letter-spacing: 0.04em;
  }
  .pg-meta-bar dt { color: var(--c-text-4); display: inline; margin-right: 8px; text-transform: uppercase; }
  .pg-meta-bar dd { color: var(--c-text-2); display: inline; }
  .pg-meta-bar > div { padding-top: var(--sp-4); }

  /* ------------------------------------------------
     FEATURE BLOCKS — editorial stacked
     ------------------------------------------------ */
  .feat-section { padding-block: var(--section-y); }
  .feat-row {
    display: grid;
    grid-template-columns: 120px 1fr 1fr;
    gap: var(--sp-8);
    padding-block: var(--sp-9);
    border-top: 1px solid var(--c-border);
    align-items: start;
  }
  .feat-row:last-child { border-bottom: 1px solid var(--c-border); }
  .feat-index {
    font-family: var(--ff-mono);
    font-size: var(--fs-micro);
    color: var(--c-text-4);
    letter-spacing: 0.08em;
  }
  .feat-head h3 {
    font-size: var(--fs-h3);
    margin-bottom: var(--sp-4);
    letter-spacing: -0.016em;
    font-weight: 500;
  }
  .feat-head p {
    color: var(--c-text-2);
    font-size: var(--fs-body);
    line-height: 1.65;
    max-width: 42ch;
  }
  .feat-detail {
    font-family: var(--ff-mono);
    font-size: var(--fs-micro);
    color: var(--c-text-3);
    line-height: 1.8;
    letter-spacing: 0.02em;
  }
  .feat-detail .kv { display: flex; justify-content: space-between; gap: 16px; }
  .feat-detail .kv span:first-child { color: var(--c-text-4); text-transform: uppercase; letter-spacing: 0.06em; font-size: 10px; }
  .feat-detail .kv span:last-child { color: var(--c-text-2); }

  /* Pro-only indicator on capacity/feature cards */
  .feat-head .pro-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-family: var(--ff-mono);
    font-size: 10px;
    letter-spacing: 0.1em;
    color: var(--c-accent-hi);
    background: color-mix(in oklab, var(--c-accent) 10%, transparent);
    border: 1px solid color-mix(in oklab, var(--c-accent) 30%, transparent);
    padding: 3px 8px;
    border-radius: 100px;
    text-transform: uppercase;
    margin-left: var(--sp-3);
    vertical-align: middle;
    position: relative;
    top: -2px;
  }
  .feat-head .pro-badge::before {
    content: '';
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--c-accent);
  }

  /* ------------------------------------------------
     SCREENSHOT FRAME — authentic macOS chrome
     ------------------------------------------------ */
  .mac-window {
    background: var(--c-panel);
    border: 1px solid var(--c-border-strong);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow-elev);
  }
  .mac-titlebar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    background: var(--c-elevated);
    border-bottom: 1px solid var(--c-border);
  }
  .mac-tl-dot {
    width: 12px; height: 12px; border-radius: 50%;
    background: #3a3734;
  }
  .mac-tl-dot.red { background: #ff5f57; }
  .mac-tl-dot.yellow { background: #febc2e; }
  .mac-tl-dot.green { background: #28c840; }
  .mac-tl-title {
    margin-left: auto;
    margin-right: auto;
    font-family: var(--ff-mono);
    font-size: 11px;
    color: var(--c-text-3);
    letter-spacing: 0.04em;
  }

  .phone-frame {
    aspect-ratio: 9 / 19.5;
    max-width: 280px;
    border-radius: 36px;
    border: 2px solid var(--c-border-strong);
    background: var(--c-base);
    padding: 10px;
    box-shadow: var(--shadow-elev);
  }
  .phone-inner {
    width: 100%;
    height: 100%;
    border-radius: 28px;
    background: var(--c-panel);
    overflow: hidden;
    position: relative;
  }

  /* ------------------------------------------------
     KEY-VALUE TABLE — specs
     ------------------------------------------------ */
  .spec-table {
    font-family: var(--ff-mono);
    font-size: var(--fs-small);
    width: 100%;
  }
  .spec-table dt, .spec-table dd {
    display: inline;
    padding: 0;
  }
  .spec-row {
    display: grid;
    grid-template-columns: 180px 1fr;
    gap: var(--sp-6);
    padding-block: var(--sp-3);
    border-top: 1px solid var(--c-border);
  }
  .spec-row:first-child { border-top: none; }
  .spec-row dt { color: var(--c-text-4); text-transform: uppercase; letter-spacing: 0.06em; font-size: var(--fs-micro); padding-top: 3px; }
  .spec-row dd { color: var(--c-text-2); }

  /* ------------------------------------------------
     FAQ
     ------------------------------------------------ */
  .faq-item {
    border-top: 1px solid var(--c-border);
    padding-block: var(--sp-5);
  }
  .faq-item:last-child { border-bottom: 1px solid var(--c-border); }
  .faq-item summary {
    list-style: none;
    cursor: pointer;
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: var(--sp-6);
    color: var(--c-text-1);
    font-size: var(--fs-lead);
    font-weight: 500;
    letter-spacing: -0.008em;
  }
  .faq-item summary::-webkit-details-marker { display: none; }
  .faq-item summary::after {
    content: '+';
    font-family: var(--ff-mono);
    font-weight: 400;
    color: var(--c-text-3);
    font-size: 22px;
    line-height: 1;
    transition: transform var(--dur-base) var(--ease-standard);
  }
  .faq-item[open] summary::after { transform: rotate(45deg); color: var(--c-accent); }
  .faq-body {
    padding-top: var(--sp-4);
    color: var(--c-text-2);
    max-width: 62ch;
    line-height: 1.7;
    font-size: var(--fs-body);
  }
  .faq-body a { color: var(--c-accent-hi); border-bottom: 1px solid var(--c-text-4); }

  /* ------------------------------------------------
     DEV BANNER
     ------------------------------------------------ */
  .dev-banner {
    background: color-mix(in oklab, var(--c-accent) 8%, transparent);
    border-bottom: 1px solid color-mix(in oklab, var(--c-accent) 30%, transparent);
    padding: 10px var(--gutter);
    text-align: center;
    font-family: var(--ff-mono);
    font-size: var(--fs-micro);
    color: var(--c-accent-hi);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-top: 64px;
  }

  /* ------------------------------------------------
     PROGRESS LOG — for in-dev products
     ------------------------------------------------ */
  .log {
    font-family: var(--ff-mono);
    font-size: var(--fs-small);
  }
  .log-row {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: var(--sp-6);
    padding-block: var(--sp-4);
    border-top: 1px dashed var(--c-border);
    align-items: baseline;
  }
  .log-row:first-child { border-top: none; }
  .log-date {
    color: var(--c-text-4);
    letter-spacing: 0.04em;
    text-transform: uppercase;
    font-size: var(--fs-micro);
  }
  .log-text { color: var(--c-text-2); line-height: 1.6; }
  .log-text strong { color: var(--c-text-1); font-weight: 500; }
}

/* ------------------------------------------------
   UTILITIES
   ------------------------------------------------ */
@layer utilities {
  .mono { font-family: var(--ff-mono); }
  .muted { color: var(--c-text-3); }
  .text-1 { color: var(--c-text-1); }
  .text-2 { color: var(--c-text-2); }
  .text-3 { color: var(--c-text-3); }
  .accent { color: var(--c-accent); }
  .uppercase { text-transform: uppercase; letter-spacing: 0.08em; }
  .micro {
    font-family: var(--ff-mono);
    font-size: var(--fs-micro);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--c-text-3);
  }
  .hidden { display: none !important; }
}

/* ------------------------------------------------
   APP MOCKUPS — carousel showcase
   ------------------------------------------------ */
.showcase {
  padding-block: 0 var(--section-y);
  position: relative;
}
.showcase-wrap {
  max-width: 1040px;
  margin-inline: auto;
  text-align: center;
}

/* === CAROUSEL === */
.carousel {
  position: relative;
  width: 100%;
  overflow: hidden;
}
.carousel-track {
  display: flex;
  scroll-snap-type: x mandatory;
  overflow-x: auto;
  scroll-behavior: smooth;
  scrollbar-width: none;
  -ms-overflow-style: none;
  -webkit-overflow-scrolling: touch;
  gap: 0;
}
.carousel-track::-webkit-scrollbar { display: none; }
.carousel-slide {
  flex: 0 0 100%;
  scroll-snap-align: center;
  scroll-snap-stop: always;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 8px;
}
.carousel-slide img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border-radius: 12px;
  border: 1px solid var(--c-border-strong);
  box-shadow: 0 40px 80px -20px rgba(0,0,0,0.5), 0 0 0 1px color-mix(in oklab, white 4%, transparent);
  background: var(--c-panel);
}

/* phone-mode carousel */
.showcase-wrap.is-phone .carousel-slide img {
  max-width: 320px;
  border-radius: 32px;
  box-shadow: 0 30px 80px -20px rgba(0,0,0,0.6), 0 0 0 1px color-mix(in oklab, white 6%, transparent);
}

/* ==================================================================
   DUAL-DEVICE CAROUSEL — iPhone portrait + iPad landscape, in sync
   ================================================================== */
.showcase-wrap.is-dual {
  max-width: 1100px;
}
.showcase-wrap.is-dual .carousel-slide {
  padding: 0 16px;
}
.showcase-wrap.is-dual .dual-pair {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(20px, 3vw, 48px);
  width: 100%;
  margin-inline: auto;
}

/* iPhone portrait — keeps its natural ratio, no cropping */
.showcase-wrap.is-dual .dev-phone {
  display: block;
  flex: 0 0 auto;
  width: clamp(140px, 16vw, 200px);
  height: auto;
  background: var(--c-panel);
  border: 1px solid var(--c-border-strong);
  border-radius: clamp(20px, 2vw, 28px);
  box-shadow:
    0 24px 60px -18px rgba(0,0,0,0.55),
    0 0 0 1px color-mix(in oklab, white 6%, transparent);
}

/* iPad landscape — natural ratio, no cropping, sized to balance the phone */
.showcase-wrap.is-dual .dev-tablet {
  display: block;
  flex: 0 1 auto;
  width: clamp(380px, 50vw, 640px);
  height: auto;
  background: var(--c-panel);
  border: 1px solid var(--c-border-strong);
  border-radius: clamp(10px, 1vw, 14px);
  box-shadow:
    0 32px 80px -22px rgba(0,0,0,0.6),
    0 0 0 1px color-mix(in oklab, white 5%, transparent);
}

/* Device frame — wraps each image with a label above */
.showcase-wrap.is-dual .dev-frame {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-3);
  margin: 0;
}
.showcase-wrap.is-dual .dev-label {
  font-family: var(--ff-mono);
  font-size: var(--fs-micro);
  color: var(--c-text-4);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 500;
  position: relative;
  padding-left: 18px;
}
/* Hex-dump-style accent dash before the label, matching the site's eyebrow style */
.showcase-wrap.is-dual .dev-label::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  width: 12px;
  height: 1px;
  background: var(--c-accent);
  transform: translateY(-50%);
}

/* Mobile — stack vertically */
@media (max-width: 900px) {
  .showcase-wrap.is-dual .dual-pair {
    flex-direction: column;
    gap: var(--sp-7);
  }
  .showcase-wrap.is-dual .dev-phone {
    width: 200px;
  }
  .showcase-wrap.is-dual .dev-tablet {
    width: min(540px, 100%);
  }
}
@media (max-width: 540px) {
  .showcase-wrap.is-dual .dev-tablet {
    display: none;
  }
  .showcase-wrap.is-dual .dev-phone {
    width: clamp(220px, 70vw, 280px);
  }
}

/* arrows */
.carousel-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: color-mix(in oklab, var(--c-base) 70%, transparent);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border: 1px solid var(--c-border-strong);
  color: var(--c-text-1);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 5;
  opacity: 0;
  transition: opacity var(--dur-base) var(--ease-standard),
              background var(--dur-fast) var(--ease-standard),
              border-color var(--dur-fast) var(--ease-standard);
}
.carousel:hover .carousel-arrow,
.carousel:focus-within .carousel-arrow { opacity: 1; }
.carousel-arrow:hover {
  background: var(--c-elevated);
  border-color: var(--c-accent);
  color: var(--c-accent-hi);
}
.carousel-arrow.prev { left: 12px; }
.carousel-arrow.next { right: 12px; }
.carousel-arrow:disabled { opacity: 0.3; cursor: default; pointer-events: none; }

/* dots */
.carousel-dots {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: var(--sp-6);
}
.carousel-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-border-strong);
  border: none;
  padding: 0;
  cursor: pointer;
  transition: background var(--dur-base) var(--ease-standard),
              transform var(--dur-base) var(--ease-out),
              width var(--dur-base) var(--ease-out);
}
.carousel-dot:hover { background: var(--c-text-3); }
.carousel-dot.is-active {
  background: var(--c-accent);
  width: 24px;
  border-radius: 4px;
}

/* counter */
.carousel-counter {
  font-family: var(--ff-mono);
  font-size: var(--fs-micro);
  color: var(--c-text-4);
  letter-spacing: 0.08em;
  margin-top: var(--sp-3);
  font-variant-numeric: tabular-nums;
}
.carousel-counter .current { color: var(--c-text-2); }

.showcase-caption {
  font-family: var(--ff-mono);
  font-size: var(--fs-micro);
  color: var(--c-text-4);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-top: var(--sp-3);
  text-align: center;
}

@media (max-width: 600px) {
  .carousel-arrow { display: none; }
  .carousel-slide { padding: 0 4px; }
}

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

/* ==================================================================
   LIGHTBOX — click any carousel image to view it large
   ================================================================== */
.carousel-slide img {
  cursor: zoom-in;
  transition: transform var(--dur-base) var(--ease-out);
}
.carousel-slide img:hover {
  transform: scale(1.01);
}

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: color-mix(in oklab, #000 88%, transparent);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
  padding: clamp(20px, 4vw, 64px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 240ms var(--ease-out);
}
.lightbox.is-open {
  opacity: 1;
  pointer-events: auto;
}
.lightbox[hidden] { display: none; }

.lightbox-stage {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-4);
  max-width: 100%;
  max-height: 100%;
  margin: 0;
  transform: scale(0.92);
  opacity: 0;
  transition: transform 320ms var(--ease-out), opacity 240ms var(--ease-out);
}
.lightbox.is-open .lightbox-stage {
  transform: scale(1);
  opacity: 1;
}

.lightbox-img {
  display: block;
  max-width: min(1400px, 92vw);
  max-height: 82vh;
  width: auto;
  height: auto;
  border-radius: clamp(8px, 0.8vw, 14px);
  border: 1px solid var(--c-border-strong);
  background: var(--c-panel);
  box-shadow:
    0 40px 100px -20px rgba(0,0,0,0.7),
    0 0 0 1px color-mix(in oklab, white 5%, transparent);
}

/* phones: portrait images get more rounded corners */
.lightbox-img.is-phone-shape {
  border-radius: clamp(20px, 2.4vw, 36px);
}

.lightbox-caption {
  font-family: var(--ff-mono);
  font-size: var(--fs-micro);
  color: var(--c-text-3);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.lightbox-close,
.lightbox-arrow {
  position: absolute;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: color-mix(in oklab, var(--c-base) 70%, transparent);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border: 1px solid var(--c-border-strong);
  color: var(--c-text-1);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 1;
  transition: background var(--dur-fast) var(--ease-standard),
              border-color var(--dur-fast) var(--ease-standard),
              color var(--dur-fast) var(--ease-standard),
              transform var(--dur-fast) var(--ease-standard);
}
.lightbox-close:hover,
.lightbox-arrow:hover {
  background: var(--c-elevated);
  border-color: var(--c-accent);
  color: var(--c-accent-hi);
}
.lightbox-close:active,
.lightbox-arrow:active {
  transform: scale(0.96);
}
.lightbox-close { top: clamp(16px, 2.5vw, 32px); right: clamp(16px, 2.5vw, 32px); }
.lightbox-prev  { left: clamp(16px, 2.5vw, 32px);  top: 50%; transform: translateY(-50%); }
.lightbox-next  { right: clamp(16px, 2.5vw, 32px); top: 50%; transform: translateY(-50%); }
.lightbox-prev:active { transform: translateY(-50%) scale(0.96); }
.lightbox-next:active { transform: translateY(-50%) scale(0.96); }

@media (max-width: 600px) {
  .lightbox-prev { left: 8px; }
  .lightbox-next { right: 8px; }
  .lightbox-close { top: 12px; right: 12px; }
  .lightbox-img { max-height: 78vh; }
}

@media (prefers-reduced-motion: reduce) {
  .lightbox,
  .lightbox-stage { transition: none; }
  .lightbox.is-open .lightbox-stage { transform: none; }
  .carousel-slide img:hover { transform: none; }
}

@media (max-width: 900px) {
  .nav-links { display: none; }
  .nav-links.is-open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0; right: 0;
    background: var(--c-panel);
    border-bottom: 1px solid var(--c-border);
    padding: var(--sp-5) var(--gutter);
    gap: var(--sp-4);
    align-items: flex-start;
  }
  .nav-toggle { display: inline-flex; }


  .sec-head { grid-template-columns: 1fr; gap: var(--sp-4); }
  .sec-offset { padding-top: 0; }

  .product-row {
    grid-template-columns: 1fr;
    gap: var(--sp-4);
    padding-block: var(--sp-8);
  }
  .product-action { text-align: left; }

  .journal-item {
    grid-template-columns: 1fr;
    gap: var(--sp-2);
    padding-block: var(--sp-5);
  }

  .colophon { grid-template-columns: 1fr; gap: var(--sp-4); }

  .feat-row { grid-template-columns: 1fr; gap: var(--sp-5); padding-block: var(--sp-7); }
  .feat-detail { padding-top: var(--sp-4); border-top: 1px dashed var(--c-border); }

  .spec-row { grid-template-columns: 1fr; gap: var(--sp-1); padding-block: var(--sp-4); }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--sp-7);
  }
  .footer-brand { grid-column: 1 / -1; }
  .footer-meta { flex-direction: column; gap: var(--sp-3); }

  .log-row { grid-template-columns: 1fr; gap: var(--sp-1); }
}

@media (max-width: 540px) {
  .footer-grid { grid-template-columns: 1fr; }
  .hero-title { font-size: clamp(2.25rem, 8vw, 3rem); }
  .pg-meta-bar { gap: var(--sp-4); }
}

/* ------------------------------------------------
   SCROLL REVEAL
   ------------------------------------------------ */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 700ms var(--ease-out), transform 700ms var(--ease-out);
}
.reveal.is-in {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; }
}