/* =============================================================================
 * The Sky Residences — Design System
 * CormackCoreWeb 2.0 · Cormack Advertising
 *
 * Foundation only: tokens, @font-face, reset, fluid type, layout, spacing,
 * utilities, motion + a11y primitives. Derived from assets/css/figma-export.css.
 *
 * NOTE: This file is self-contained and NOT enqueued yet. Loading it does not
 * alter existing page markup beyond base element styling. Pair with the Typekit
 * link for Proxima Nova:
 *   <link rel="stylesheet" href="https://use.typekit.net/mkf2kyr.css">
 *
 * Conventions:
 *   --c-*      colour            --step-*  fluid type scale
 *   --font-*   family            --lh-*    line-height
 *   --ls-*     letter-spacing    --space-* spacing scale
 *   --radius-* corner radius     --shadow-*/--ease-*/--dur-* motion
 *   --z-*      z-index layers
 * ========================================================================== */

/* -----------------------------------------------------------------------------
 * 1. Fonts
 *   Reforma 1969 (display) — bundled. Single optical weight on disk ("Gris");
 *   declared across the weights the design uses so the family always resolves.
 *   Proxima Nova (body) — loaded via Typekit (mkf2kyr), declared in :root tokens.
 * -------------------------------------------------------------------------- */
@font-face {
  font-family: "Reforma 1969";
  src: url("../fonts/Reforma 1969 Gris/Reforma 1969 Gris.woff2") format("woff2"),
       url("../fonts/Reforma 1969 Gris/Reforma 1969 Gris.woff") format("woff"),
       url("../fonts/Reforma 1969 Gris/Reforma 1969 Gris.ttf") format("truetype");
  font-weight: 300 500; /* design uses 300 + 500; one file serves the range */
  font-style: normal;
  font-display: swap;
}

/* -----------------------------------------------------------------------------
 * 2. Design tokens
 * -------------------------------------------------------------------------- */
:root {
  /* ---- Brand palette (from Figma export) ---- */
  --c-gold: #837550;          /* primary accent — bronze/gold */
  --c-gold-ink: #6c6041;      /* darker gold for text contrast on light bg */
  --c-cream: #fcf0da;         /* warm cream — panels, hovers */
  --c-bg: #f8f5f0;            /* page background — warm off-white */
  --c-bg-alt: #edebe7;        /* alt section background */
  --c-ink: #290508;           /* near-black maroon — headings on light */
  --c-text: #494949;          /* default body text */
  --c-text-muted: #706f6f;    /* secondary/muted text */
  --c-white: #ffffff;
  --c-black: #000000;
  --c-border: rgba(41, 5, 8, 0.12);
  --c-overlay: rgba(41, 5, 8, 0.45);     /* image scrims */
  --c-surface-glass: rgba(217, 217, 217, 0.2); /* pill nav fill */

  /* Semantic aliases — prefer these in components */
  --c-accent: var(--c-gold);
  --c-heading: var(--c-ink);
  --c-on-accent: var(--c-white);
  --c-page-bg: var(--c-bg);

  /* ---- Typography ---- */
  --font-display: "Reforma 1969", "Times New Roman", Georgia, serif;
  --font-body: "proxima-nova", "Helvetica Neue", Helvetica, Arial, sans-serif;

  /* Fluid type scale. min = mobile, max ≈ Figma px on the 1440 artboard.
     clamp() midpoint scales with viewport for smooth responsiveness. */
  --step-caption: clamp(0.625rem, 0.59rem + 0.18vw, 0.75rem);   /* 10 → 12 (was 8–14) */
  --step-label:   clamp(0.75rem, 0.71rem + 0.18vw, 0.875rem);   /* 12 → 14 */
  --step-body:    clamp(0.9375rem, 0.9rem + 0.2vw, 1rem);       /* 15 → 16 */
  --step-body-lg: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);      /* 16 → 18 */
  --step-h4:      clamp(1.125rem, 1rem + 0.6vw, 1.375rem);      /* 18 → 22 */
  --step-h3:      clamp(1.5rem, 1.2rem + 1.4vw, 2.0625rem);     /* 24 → 33 */
  --step-h2:      clamp(1.875rem, 1.4rem + 2.3vw, 2.4375rem);   /* 30 → 39 (37/39 figma) */
  --step-h1:      clamp(2.5rem, 1.2rem + 6.2vw, 5.3125rem);     /* 40 → 85 */
  --step-display: clamp(3rem, 0.9rem + 9vw, 6.5625rem);         /* 48 → 105 (hero) */

  --lh-tight: 0.98;     /* display / big headings */
  --lh-snug: 1.12;      /* sub-headings */
  --lh-normal: 1.27;    /* short paragraphs */
  --lh-body: 1.417;     /* body copy (141.7% from figma) */

  --ls-tight: 0.11em;
  --ls-wide: 0.18em;
  --ls-wider: 0.2em;    /* most uppercase labels */
  --ls-widest: 0.4em;   /* spaced display labels */
  --ls-body: 0;

  --fw-thin: 100;
  --fw-extralight: 275;
  --fw-light: 300;
  --fw-regular: 400;
  --fw-medium: 500;
  --fw-semibold: 600;
  --fw-bold: 700;
  --fw-extrabold: 800;
  --fw-black: 900;

  /* ---- Spacing scale (8px base rhythm). Section-level steps are fluid. ---- */
  --space-3xs: 0.25rem;   /* 4  */
  --space-2xs: 0.5rem;    /* 8  */
  --space-xs:  0.75rem;   /* 12 */
  --space-sm:  1rem;      /* 16 */
  --space-md:  1.5rem;    /* 24 */
  --space-lg:  2rem;      /* 32 */
  --space-xl:  3rem;      /* 48 */
  --space-2xl: 4rem;      /* 64 */
  --space-3xl: 6rem;      /* 96 */

  /* Fluid rhythm for consistent, even section padding/gaps across breakpoints */
  --space-gutter:  clamp(1.25rem, 0.8rem + 2.2vw, 4rem);   /* page side padding */
  --space-section: clamp(3.5rem, 2rem + 6vw, 8rem);        /* vertical section rhythm */
  --space-flow:    clamp(1rem, 0.8rem + 1vw, 1.75rem);     /* gap between flow elements */

  /* ---- Layout ---- */
  --content-max: 1600px;   /* client spec — page content max width */
  --measure: 65ch;         /* optimal reading line length */
  --wrap-narrow: 720px;
  --wrap-wide: 1200px;

  /* ---- Radius ---- */
  --radius-sm: 0.5rem;     /* 8  */
  --radius-md: 1rem;       /* 16 */
  --radius-lg: 1.9375rem;  /* 31 — figma pill */
  --radius-xl: 3.1875rem;  /* 51 — figma pill */
  --radius-2xl: 5.3125rem; /* 85 */
  --radius-pill: 999px;
  --radius-circle: 50%;

  /* ---- Elevation ---- */
  --shadow-xs: 0 1px 2px rgba(41, 5, 8, 0.06);
  --shadow-sm: 0 2px 8px rgba(41, 5, 8, 0.08);
  --shadow-md: 0 8px 24px rgba(41, 5, 8, 0.1);
  --shadow-lg: 0 18px 50px rgba(41, 5, 8, 0.14);

  /* ---- Liquid glass ---- */
  --glass-light: var(--c-white);     /* edge highlight colour */
  --glass-dark: var(--c-ink);        /* edge shadow / refraction colour */
  --glass-tint: var(--c-white);      /* surface fill colour */
  --glass-tint-amount: 16%;          /* how opaque the fill is */
  --glass-reflex-light: 1;           /* highlight intensity multiplier */
  --glass-reflex-dark: 1;            /* shadow/refraction intensity multiplier */
  --glass-blur: 8px;
  --glass-saturation: 150%;

  /* ---- Motion ---- */
  --dur-fast: 150ms;
  --dur-base: 280ms;
  --dur-slow: 500ms;
  --dur-slower: 800ms;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);     /* gentle deceleration */
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --ease-emph: cubic-bezier(0.16, 1, 0.3, 1);      /* emphasised reveal */

  /* ---- Z-index scale ---- */
  --z-base: 0;
  --z-raised: 10;
  --z-sticky: 100;
  --z-header: 200;
  --z-overlay: 800;
  --z-modal: 900;
  --z-toast: 1000;
}

/* -----------------------------------------------------------------------------
 * 3. Modern reset
 * -------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

* { margin: 0; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  -webkit-tap-highlight-color: transparent;
}

body {
  min-height: 100svh;
  font-family: var(--font-body);
  font-size: var(--step-body);
  font-weight: var(--fw-light);
  line-height: var(--lh-body);
  color: var(--c-text);
  background-color: var(--c-page-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

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

input, button, textarea, select { font: inherit; color: inherit; }

button { background: none; border: 0; cursor: pointer; }

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

ul[role="list"], ol[role="list"] { list-style: none; padding: 0; }

p, h1, h2, h3, h4, h5, h6 { overflow-wrap: break-word; }

:where(h1, h2, h3, h4, h5, h6) { text-wrap: balance; }
:where(p) { text-wrap: pretty; }

/* Media that should fill its box */
.fill { width: 100%; height: 100%; object-fit: cover; }

/* -----------------------------------------------------------------------------
 * 4. Typographic base
 * -------------------------------------------------------------------------- */
h1, .t-h1 {
  font-family: var(--font-display);
  font-weight: var(--fw-light);
  font-size: var(--step-h1);
  line-height: var(--lh-tight);
  letter-spacing: var(--ls-body);
  color: var(--c-heading);
  text-transform: uppercase;
}

h2, .t-h2 {
  font-family: var(--font-display);
  font-weight: var(--fw-medium);
  font-size: var(--step-h2);
  line-height: var(--lh-tight);
  color: var(--c-heading);
  text-transform: uppercase;
}

h3, .t-h3 {
  font-family: var(--font-display);
  font-weight: var(--fw-medium);
  font-size: var(--step-h3);
  line-height: var(--lh-snug);
  color: var(--c-heading);
}

h4, .t-h4 {
  font-family: var(--font-body);
  font-weight: var(--fw-semibold);
  font-size: var(--step-h4);
  line-height: var(--lh-snug);
  color: var(--c-heading);
}

p { max-width: var(--measure); }

strong, b { font-weight: var(--fw-semibold); }
em, i { font-style: italic; }
small { font-size: var(--step-label); }

a:where(.link) {
  color: var(--c-gold-ink);
  text-decoration: underline;
  text-underline-offset: 0.18em;
  text-decoration-thickness: 1px;
  transition: color var(--dur-fast) var(--ease-out);
}
a:where(.link):hover { color: var(--c-ink); }

/* Display + label helpers reused across components */
.t-display {
  font-family: var(--font-display);
  font-weight: var(--fw-extralight);
  font-size: var(--step-display);
  line-height: var(--lh-tight);
  color: var(--c-heading);
}
.t-eyebrow {
  font-family: var(--font-body);
  font-weight: var(--fw-semibold);
  font-size: var(--step-label);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  color: var(--c-gold);
}
.t-label {
  font-family: var(--font-body);
  font-weight: var(--fw-regular);
  font-size: var(--step-label);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
}
.t-lead { font-size: var(--step-body-lg); line-height: var(--lh-body); }
.t-muted { color: var(--c-text-muted); }
.t-center { text-align: center; }
.t-balance { text-wrap: balance; }
.t-measure { max-width: var(--measure); }

/* -----------------------------------------------------------------------------
 * 5. Layout primitives
 * -------------------------------------------------------------------------- */

/* Page container — caps content at 1600px with fluid, even side gutters */
.container {
  width: 100%;
  max-width: var(--content-max);
  margin-inline: auto;
  padding-inline: var(--space-gutter);
}
.container--narrow { max-width: var(--wrap-narrow); }
.container--wide { max-width: var(--wrap-wide); }
.container--bleed { max-width: none; padding-inline: 0; } /* full-bleed media */

/* Section — vertical rhythm wrapper for consistent spacing between sections */
.section { padding-block: var(--space-section); }
.section--tight { padding-block: clamp(2rem, 1.2rem + 3vw, 4rem); }
.section--flush-top { padding-top: 0; }
.section--flush-bottom { padding-bottom: 0; }
.section--bg { background-color: var(--c-bg-alt); }
.section--cream { background-color: var(--c-cream); }
.section--ink { background-color: var(--c-ink); color: var(--c-bg); }
.section--ink :where(h1, h2, h3, h4, .t-display) { color: var(--c-white); }

/* Vertical flow — consistent gaps between stacked children */
.flow > * + * { margin-top: var(--space-flow); }
.flow-sm > * + * { margin-top: var(--space-sm); }
.flow-lg > * + * { margin-top: var(--space-lg); }

/* Cluster — horizontal grouping with wrap (buttons, meta, tags) */
.cluster {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-sm);
}
.cluster--between { justify-content: space-between; }
.cluster--center { justify-content: center; }

/* Auto-fit responsive grid — no media queries needed */
.grid { display: grid; gap: var(--space-md); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
.grid--auto {
  grid-template-columns: repeat(auto-fit, minmax(min(16rem, 100%), 1fr));
}
.grid--gap-lg { gap: var(--space-lg); }

/* Split layout — content beside media, stacks on small screens */
.split {
  display: grid;
  gap: clamp(1.5rem, 1rem + 3vw, 4rem);
  align-items: center;
  grid-template-columns: 1fr;
}
@media (min-width: 48em) {
  .split { grid-template-columns: 1fr 1fr; }
  .split--40-60 { grid-template-columns: 4fr 6fr; }
  .split--60-40 { grid-template-columns: 6fr 4fr; }
}

/* Center a child both axes with optional intrinsic gutter */
.center {
  display: grid;
  place-items: center;
}

/* Aspect-ratio media frames */
.frame { position: relative; overflow: hidden; }
.frame > img, .frame > video { width: 100%; height: 100%; object-fit: cover; }
.ratio-square { aspect-ratio: 1 / 1; }
.ratio-portrait { aspect-ratio: 3 / 4; }
.ratio-landscape { aspect-ratio: 4 / 3; }
.ratio-wide { aspect-ratio: 16 / 9; }
.ratio-ultra { aspect-ratio: 21 / 9; }

/* -----------------------------------------------------------------------------
 * 6. Component primitives (foundation-level, theme-agnostic)
 * -------------------------------------------------------------------------- */

/* Buttons ------------------------------------------------------------------ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2xs);
  padding: 0.9em 2em;
  font-family: var(--font-body);
  font-size: var(--step-label);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-tight);
  text-transform: uppercase;
  line-height: 1;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  color: var(--c-on-accent);
  background-color: var(--c-gold);
  cursor: pointer;
  transition: background-color var(--dur-base) var(--ease-out),
              color var(--dur-base) var(--ease-out),
              border-color var(--dur-base) var(--ease-out),
              transform var(--dur-base) var(--ease-out),
              box-shadow var(--dur-base) var(--ease-out);
}
.btn:hover { background-color: var(--c-gold-ink); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn:active { transform: translateY(0); box-shadow: var(--shadow-sm); }

.btn--outline {
  background-color: transparent;
  border-color: var(--c-gold);
  color: var(--c-gold-ink);
}
.btn--outline:hover { background-color: var(--c-gold); color: var(--c-on-accent); }

.btn--ghost {
  background-color: transparent;
  color: var(--c-heading);
  border-color: var(--c-border);
}
.btn--ghost:hover { background-color: var(--c-cream); border-color: transparent; transform: translateY(-2px); }

.btn--light { background-color: var(--c-white); color: var(--c-ink); }
.btn--light:hover { background-color: var(--c-cream); }

/* Circular icon button (the "Discover" arrow) */
.btn-circle {
  display: inline-grid;
  place-items: center;
  inline-size: clamp(3rem, 2.4rem + 2vw, 4.25rem);
  aspect-ratio: 1;
  border-radius: var(--radius-circle);
  border: 1px solid var(--c-gold);
  color: var(--c-gold);
  background-color: transparent;
  transition: background-color var(--dur-base) var(--ease-out),
              color var(--dur-base) var(--ease-out),
              transform var(--dur-base) var(--ease-out);
}
.btn-circle:hover { background-color: var(--c-gold); color: var(--c-on-accent); transform: scale(1.06); }
.btn-circle svg { width: 38%; height: auto; }

/* Surface / card ----------------------------------------------------------- */
.surface {
  background-color: var(--c-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}
.card {
  display: flex;
  flex-direction: column;
  background-color: var(--c-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--dur-base) var(--ease-out), box-shadow var(--dur-base) var(--ease-out);
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.card__body { padding: var(--space-md); }

/* Pill nav surface (matches figma glass pill) */
.pill {
  display: inline-flex;
  align-items: center;
  gap: clamp(1rem, 0.5rem + 2vw, 2.5rem);
  padding: 0.65rem 1.75rem;
  background-color: var(--c-surface-glass);
  border-radius: var(--radius-pill);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

/* -----------------------------------------------------------------------------
 * Liquid glass — reusable Apple-style glass surface.
 * The multi-layer inset box-shadow paints the refractive edge highlights and
 * shadows; backdrop-filter does the blur + saturation. In Chromium, the
 * url(#liquid-glass) SVG filter adds real lensing/refraction; Safari & Firefox
 * ignore the url() and fall back to plain blur (see @supports below).
 * Tune per element via --glass-* custom properties.
 * -------------------------------------------------------------------------- */
.glass {
  position: relative;
  background-color: color-mix(in srgb, var(--glass-tint) var(--glass-tint-amount), transparent);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturation));
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturation));
  box-shadow:
    inset 0 0 0 1px color-mix(in srgb, var(--glass-light) calc(var(--glass-reflex-light) * 10%), transparent),
    inset 1.8px 3px 0 -2px color-mix(in srgb, var(--glass-light) calc(var(--glass-reflex-light) * 90%), transparent),
    inset -2px -2px 0 -2px color-mix(in srgb, var(--glass-light) calc(var(--glass-reflex-light) * 80%), transparent),
    inset -3px -8px 1px -6px color-mix(in srgb, var(--glass-light) calc(var(--glass-reflex-light) * 60%), transparent),
    inset -0.3px -1px 4px 0 color-mix(in srgb, var(--glass-dark) calc(var(--glass-reflex-dark) * 12%), transparent),
    inset -1.5px 2.5px 0 -2px color-mix(in srgb, var(--glass-dark) calc(var(--glass-reflex-dark) * 20%), transparent),
    inset 0 3px 4px -2px color-mix(in srgb, var(--glass-dark) calc(var(--glass-reflex-dark) * 20%), transparent),
    inset 2px -6.5px 1px -4px color-mix(in srgb, var(--glass-dark) calc(var(--glass-reflex-dark) * 10%), transparent),
    0 1px 5px 0 color-mix(in srgb, var(--glass-dark) calc(var(--glass-reflex-dark) * 10%), transparent),
    0 6px 16px 0 color-mix(in srgb, var(--glass-dark) calc(var(--glass-reflex-dark) * 8%), transparent);
}

/* Chromium-only: add the SVG displacement filter for real refraction.
   Gated on cross-fade support (a Chromium proxy) so Safari/FF keep the clean
   blur above and never apply a url() filter they'd render as broken/empty. */
@supports (background: cross-fade(url(#x), red, 50%)) {
  .glass {
    -webkit-backdrop-filter: blur(var(--glass-blur)) url(#liquid-glass) saturate(var(--glass-saturation));
    backdrop-filter: blur(var(--glass-blur)) url(#liquid-glass) saturate(var(--glass-saturation));
  }
}

/* Fallback: if backdrop-filter is unsupported, raise the fill so content behind
   the glass can't bleed through and hurt legibility. */
@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .glass {
    background-color: color-mix(in srgb, var(--glass-tint) calc(var(--glass-tint-amount) + 55%), transparent);
  }
}

/* Respect users who prefer reduced transparency. */
@media (prefers-reduced-transparency: reduce) {
  .glass {
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
    background-color: color-mix(in srgb, var(--glass-tint) calc(var(--glass-tint-amount) + 55%), transparent);
  }
}

/* Liquid-glass filter host: hidden but kept in the render tree (display:none
   would stop the filter resolving in Chromium). */
.glass-filter {
  position: absolute;
  width: 0;
  height: 0;
  pointer-events: none;
  opacity: 0;
}

/* Decorative hairline divider */
.divider { block-size: 1px; border: 0; background-color: var(--c-border); }
.divider--gold { background-color: var(--c-gold); opacity: 0.5; }

/* -----------------------------------------------------------------------------
 * 7. Utility helpers
 * -------------------------------------------------------------------------- */
.u-sr-only {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0);
  white-space: nowrap; border: 0;
}
.u-hidden { display: none !important; }
.u-relative { position: relative; }
.u-overflow-hidden { overflow: hidden; }
.u-full { width: 100%; }
.u-mx-auto { margin-inline: auto; }
.u-text-center { text-align: center; }

/* Spacing utilities (margin-top / block padding) keyed to the scale */
.mt-0 { margin-top: 0; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.pb-section { padding-bottom: var(--space-section); }
.pt-section { padding-top: var(--space-section); }

/* Background helpers */
.bg-cream { background-color: var(--c-cream); }
.bg-alt { background-color: var(--c-bg-alt); }
.bg-ink { background-color: var(--c-ink); color: var(--c-bg); }
.text-gold { color: var(--c-gold); }
.text-ink { color: var(--c-ink); }
.text-muted { color: var(--c-text-muted); }

/* Image scrim for legible text over photos */
.scrim { position: relative; }
.scrim::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 0%, var(--c-overlay) 100%);
  pointer-events: none;
}
.scrim > * { position: relative; z-index: var(--z-raised); }

/* -----------------------------------------------------------------------------
 * 8. Motion & reveal primitives
 *   Add data-reveal to any element; JS toggles [data-reveal="in"] on scroll.
 *   Works without JS too (content stays visible if JS never runs — see fallback).
 * -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: no-preference) {
  [data-reveal] {
    opacity: 0;
    transform: translateY(1.5rem);
    transition: opacity var(--dur-slow) var(--ease-emph),
                transform var(--dur-slow) var(--ease-emph);
    will-change: opacity, transform;
  }
  [data-reveal="in"] { opacity: 1; transform: none; }

  [data-reveal="fade"] { transform: none; }
  [data-reveal="left"] { transform: translateX(-2rem); }
  [data-reveal="right"] { transform: translateX(2rem); }
  [data-reveal="scale"] { transform: scale(0.96); }

  /* Stagger children: set --reveal-delay via inline style or nth-child */
  [data-reveal-group] > * {
    opacity: 0;
    transform: translateY(1.25rem);
    transition: opacity var(--dur-slow) var(--ease-emph) var(--reveal-delay, 0ms),
                transform var(--dur-slow) var(--ease-emph) var(--reveal-delay, 0ms);
  }
  [data-reveal-group].is-in > * { opacity: 1; transform: none; }
  [data-reveal-group].is-in > *:nth-child(2) { --reveal-delay: 80ms; }
  [data-reveal-group].is-in > *:nth-child(3) { --reveal-delay: 160ms; }
  [data-reveal-group].is-in > *:nth-child(4) { --reveal-delay: 240ms; }
  [data-reveal-group].is-in > *:nth-child(5) { --reveal-delay: 320ms; }
  [data-reveal-group].is-in > *:nth-child(6) { --reveal-delay: 400ms; }

  .hover-zoom { overflow: hidden; }
  .hover-zoom img { transition: transform var(--dur-slower) var(--ease-out); }
  .hover-zoom:hover img { transform: scale(1.05); }
}

/* Keyframe library */
@keyframes ds-fade-in { from { opacity: 0; } to { opacity: 1; } }
@keyframes ds-rise { from { opacity: 0; transform: translateY(2rem); } to { opacity: 1; transform: none; } }
@keyframes ds-float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }

.anim-fade { animation: ds-fade-in var(--dur-slow) var(--ease-out) both; }
.anim-rise { animation: ds-rise var(--dur-slow) var(--ease-emph) both; }
.anim-float { animation: ds-float 4s var(--ease-in-out) infinite; }

/* -----------------------------------------------------------------------------
 * 9. Accessibility & interaction
 * -------------------------------------------------------------------------- */
:where(a, button, input, textarea, select, [tabindex]):focus-visible {
  outline: 2px solid var(--c-gold);
  outline-offset: 3px;
  border-radius: 2px;
}

::selection { background-color: var(--c-gold); color: var(--c-white); }

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

/* -----------------------------------------------------------------------------
 * 10. Responsive breakpoint reference (min-width, em-based)
 *   --sm 36em(576) · --md 48em(768) · --lg 64em(1024) · --xl 80em(1280)
 *   · --2xl 100em(1600). Layout primitives above are mostly intrinsic
 *   (clamp + auto-fit) so few explicit queries are needed downstream.
 * -------------------------------------------------------------------------- */