/* ==========================================================================
   BASE.CSS — Shared mobile-first foundation
   Implements MOBILE-UI-SPEC.md. Copied into each site; brand values are
   overridden in that site's site.css. Do not put brand colors here.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. TOKENS
   -------------------------------------------------------------------------- */
:root {
  /* --- Spacing: 4px base, 8px-preferred scale --- */
  --sp-1: 0.25rem;   /*  4 */
  --sp-2: 0.5rem;    /*  8 */
  --sp-3: 0.75rem;   /* 12 */
  --sp-4: 1rem;      /* 16 */
  --sp-5: 1.25rem;   /* 20 — default mobile gutter */
  --sp-6: 1.5rem;    /* 24 */
  --sp-8: 2rem;      /* 32 — intra-section block gap */
  --sp-10: 2.5rem;   /* 40 */
  --sp-12: 3rem;     /* 48 — cluster separation */
  --sp-16: 4rem;     /* 64 */
  --sp-20: 5rem;     /* 80 */
  --sp-24: 6rem;     /* 96 */

  /* Fluid gutter: 20px @360 → 32px @1440 */
  --gutter: clamp(1.25rem, 1rem + 1.111vw, 2rem);
  /* Section block padding: 56px @360 → 112px @1440 */
  --section-y: clamp(3.5rem, 2.333rem + 5.185vw, 7rem);

  /* --- Containers --- */
  --w-prose: 42rem;    /* 672 */
  --w-content: 72rem;  /* 1152 */
  --w-wide: 85rem;     /* 1360 */

  /* --- Type scale: clamp between 360px and 1440px viewport --- */
  --t-eyebrow: 0.75rem;                                        /* 12 */
  --t-sm:      clamp(0.875rem, 0.854rem + 0.093vw, 0.9375rem); /* 14 → 15 */
  --t-body:    clamp(1.0625rem, 1rem + 0.278vw, 1.125rem);     /* 17 → 18 */
  --t-lead:    clamp(1.125rem, 1.021rem + 0.463vw, 1.375rem);  /* 18 → 22 */
  --t-h3:      clamp(1.25rem, 1.083rem + 0.741vw, 1.75rem);    /* 20 → 28 */
  --t-h2:      clamp(1.625rem, 1.333rem + 1.296vw, 2.5rem);    /* 26 → 40 */
  --t-h1:      clamp(2.125rem, 1.5rem + 2.778vw, 4rem);        /* 34 → 64 */
  --t-display: clamp(2.5rem, 1.667rem + 3.704vw, 5rem);        /* 40 → 80 */

  --lh-body: 1.6;
  --lh-lead: 1.45;
  --lh-h3: 1.25;
  --lh-h2: 1.18;
  --lh-h1: 1.08;

  /* Negative tracking on display sizes — highest-ROI premium detail */
  --tr-h1: -0.03em;
  --tr-h2: -0.02em;
  --tr-h3: -0.01em;
  --tr-eyebrow: 0.08em;

  /* --- Radius: inner = outer − padding --- */
  --r-xs: 0.25rem;
  --r-sm: 0.5rem;
  --r-md: 0.75rem;
  --r-lg: 1rem;
  --r-xl: 1.5rem;
  --r-2xl: 1.75rem;
  --r-full: 9999px;

  /* --- Chrome heights (spec §2.3, §2.4) --- */
  --header-h: 3.5rem;   /* 56px */
  --header-h-sm: 3rem;  /* 48px after shrink */
  --cta-h: 4.5rem;      /* 72px bottom action bar */

  /* --- Motion: authored positive; see §5.3 --- */
  --ease-standard: cubic-bezier(0.2, 0, 0, 1);
  --ease-out-soft: cubic-bezier(0.05, 0.7, 0.1, 1);
  --ease-in-sharp: cubic-bezier(0.3, 0, 0.8, 0.15);
  --ease-spring: linear(0, .006, .025 2.8%, .101 6.1%, .539 18.9%, .721 25.3%,
    .849 31.5%, .937 38.1%, .968 41.8%, .991 45.7%, 1.006 50.1%, 1.015 60%, 1.004 78.2%, 1);
  --dur-1: 100ms;
  --dur-2: 160ms;
  --dur-3: 220ms;
  --dur-4: 300ms;
  --dur-5: 360ms;

  /* --- Elevation: hairline borders, minimal shadow (§4.3) --- */
  --shadow-card: 0 1px 2px rgb(0 0 0 / 0.04);
  --shadow-pop: 0 8px 24px -8px rgb(0 0 0 / 0.14);
}

/* --------------------------------------------------------------------------
   2. RESET
   -------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

* { margin: 0; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  /* WCAG 2.4.11 — focused elements come to rest ABOVE the sticky bottom bar */
  scroll-padding-top: calc(var(--header-h) + var(--sp-4));
  scroll-padding-bottom: calc(var(--cta-h) + env(safe-area-inset-bottom) + var(--sp-4));
}

body {
  min-height: 100svh;
  font-family: var(--font-body);
  font-size: var(--t-body);
  line-height: var(--lh-body);
  color: var(--fg);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  /* Stops the sticky bottom bar covering the footer */
  padding-bottom: calc(var(--cta-h) + env(safe-area-inset-bottom));
}

@media (min-width: 768px) {
  body { padding-bottom: 0; }
  html { scroll-padding-bottom: var(--sp-8); }
}

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

/* 16px minimum on all controls — blocks iOS focus zoom. Non-negotiable. */
input, button, textarea, select {
  font: inherit;
  font-size: max(1rem, 1em);
  color: inherit;
}

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

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

h1 { font-size: var(--t-h1); line-height: var(--lh-h1); letter-spacing: var(--tr-h1); font-weight: 700; }
h2 { font-size: var(--t-h2); line-height: var(--lh-h2); letter-spacing: var(--tr-h2); font-weight: 700; }
h3 { font-size: var(--t-h3); line-height: var(--lh-h3); letter-spacing: var(--tr-h3); font-weight: 650; }

a { color: inherit; }

ul, ol { list-style: none; padding: 0; }

/* Visible focus on everything focusable */
:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
  border-radius: 2px;
}
:focus:not(:focus-visible) { outline: none; }

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

/* --------------------------------------------------------------------------
   3. LAYOUT UTILITIES
   -------------------------------------------------------------------------- */
.wrap {
  width: 100%;
  max-width: var(--w-content);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.wrap--prose { max-width: var(--w-prose); }
.wrap--wide { max-width: var(--w-wide); }

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

/* Full-bleed: escape the gutter (§4.5 — inset hero images are a cheapness tell) */
.bleed { margin-inline: calc(var(--gutter) * -1); }
@media (min-width: 1152px) { .bleed { margin-inline: 0; } }

/* Prose measure applies at md+ only — on mobile 40ch happens naturally (§4.1) */
.measure { max-width: none; }
@media (min-width: 768px) { .measure { max-width: 65ch; } }

.eyebrow {
  font-size: var(--t-eyebrow);
  letter-spacing: var(--tr-eyebrow);
  text-transform: uppercase;
  font-weight: 700;
  color: var(--muted);
}

.stack > * + * { margin-block-start: var(--sp-4); }
.stack-lg > * + * { margin-block-start: var(--sp-8); }

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

/* Long below-fold sections: 232ms → 30ms rendering (web.dev) */
.defer-render {
  content-visibility: auto;
  contain-intrinsic-size: auto 600px;
}

/* --------------------------------------------------------------------------
   4. SKIP LINK
   -------------------------------------------------------------------------- */
.skip {
  position: absolute;
  top: var(--sp-2); left: var(--sp-2);
  z-index: 100;
  padding: var(--sp-3) var(--sp-4);
  background: var(--accent);
  color: var(--accent-fg);
  border-radius: var(--r-sm);
  font-weight: 600;
  transform: translateY(-200%);
}
.skip:focus { transform: translateY(0); }

/* --------------------------------------------------------------------------
   5. BUTTONS  (§3.3 — 48px targets, CSS-only press feedback, scoped hover)
   -------------------------------------------------------------------------- */
.btn {
  --btn-bg: var(--accent);
  --btn-fg: var(--accent-fg);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  min-height: 3rem;          /* 48px */
  padding: var(--sp-3) var(--sp-6);
  background: var(--btn-bg);
  color: var(--btn-fg);
  border-radius: var(--r-md);
  font-weight: 650;
  font-size: 1rem;
  line-height: 1.2;
  text-decoration: none;
  text-align: center;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  transition: transform var(--dur-1) var(--ease-standard),
              background-color var(--dur-1) var(--ease-standard);
}
.btn:active { transform: scale(0.97); }

.btn--outline {
  --btn-bg: transparent;
  --btn-fg: var(--fg);
  border: 1.5px solid var(--border-strong);
}
.btn--ghost { --btn-bg: transparent; --btn-fg: var(--fg); }
.btn--lg { min-height: 3.5rem; font-size: 1.0625rem; padding-inline: var(--sp-8); }
.btn--block { display: flex; width: 100%; }

@media (hover: hover) and (pointer: fine) {
  .btn:hover { background: var(--btn-bg-hover, color-mix(in oklch, var(--btn-bg) 88%, black)); }
  .btn--outline:hover { background: var(--surface-2); }
}

/* Busy state paints in the same frame as the tap (INP budget) */
.btn[aria-busy="true"] { pointer-events: none; opacity: 0.75; }
.btn[aria-busy="true"]::before {
  content: "";
  inline-size: 1em; block-size: 1em;
  border: 2px solid currentColor;
  border-block-start-color: transparent;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.btn:disabled { opacity: 0.45; cursor: not-allowed; }

/* Invisible hit expander — visual size decoupled from tap size (§3.1) */
.tap-safe { position: relative; }
.tap-safe::after {
  content: "";
  position: absolute;
  inset: 50% 50%;
  min-width: 48px; min-height: 48px;
  width: 100%; height: 100%;
  transform: translate(-50%, -50%);
}

/* --------------------------------------------------------------------------
   6. HEADER  (§2.3 — 56px, opaque when scrolled, hide-on-scroll-down)
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  padding-top: env(safe-area-inset-top);
  background: var(--bg);
  border-bottom: 1px solid transparent;
  transition: transform var(--dur-4) var(--ease-standard),
              border-color var(--dur-2) linear,
              height var(--dur-3) var(--ease-standard);
  view-transition-name: site-header;   /* stays pinned across navigation */
}
.site-header[data-scrolled] {
  height: var(--header-h-sm);
  border-bottom-color: var(--border);
}
.site-header[data-hidden] { transform: translateY(-100%); }

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  max-width: var(--w-wide);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-weight: 800;
  font-size: 1.0625rem;
  letter-spacing: -0.02em;
  text-decoration: none;
  margin-inline-end: auto;
  min-height: 48px;
}

/* Combo nav: 2–4 visible items + labeled trigger. 57% → 86% usage (§2.1) */
.nav-visible {
  display: flex;
  gap: var(--sp-1);
}
.nav-visible a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding-inline: var(--sp-3);
  font-size: 0.9375rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--r-sm);
  color: var(--muted);
}
.nav-visible a[aria-current="page"] {
  color: var(--fg);
  box-shadow: inset 0 -2px 0 var(--accent);   /* non-color indicator too */
}
@media (hover: hover) and (pointer: fine) {
  .nav-visible a:hover { color: var(--fg); background: var(--surface-2); }
}
@media (max-width: 359px) { .nav-visible { display: none; } }

/* Menu trigger — 48px, three bars PLUS the word "Menu" (§2.2) */
.menu-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  min-height: 48px;
  min-width: 48px;
  padding-inline: var(--sp-3);
  border-radius: var(--r-sm);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  border: 1px solid var(--border);
  touch-action: manipulation;
}
.menu-btn__bars { display: grid; gap: 4px; width: 18px; }
.menu-btn__bars span {
  display: block; height: 2px; width: 100%;
  background: currentColor; border-radius: 2px;
}
@media (min-width: 1024px) { .menu-btn { display: none; } }

.nav-desktop { display: none; }
@media (min-width: 1024px) {
  .nav-desktop { display: flex; gap: var(--sp-1); align-items: center; }
  .nav-visible { display: none; }
}

/* --------------------------------------------------------------------------
   7. DRAWER  (§2.6 — native <dialog>, full-height, focus + scroll contract)
   -------------------------------------------------------------------------- */
.drawer {
  width: min(22rem, 88vw);
  max-width: none;
  height: 100dvh;            /* the one legitimate dvh use */
  max-height: 100dvh;
  margin: 0 0 0 auto;
  padding: 0;
  border: none;
  background: var(--bg);
  color: var(--fg);
  overflow-y: auto;
  overscroll-behavior: contain;
  translate: 0 0;
  transition: translate var(--dur-4) var(--ease-spring),
              overlay var(--dur-4) allow-discrete,
              display var(--dur-4) allow-discrete;
}
.drawer:not([open]) { translate: 100% 0; }
@starting-style { .drawer[open] { translate: 100% 0; } }
.drawer::backdrop {
  background: rgb(0 0 0 / 0.5);
  opacity: 1;
  transition: opacity var(--dur-4) var(--ease-standard),
              overlay var(--dur-4) allow-discrete,
              display var(--dur-4) allow-discrete;
}
.drawer:not([open])::backdrop { opacity: 0; }
@starting-style { .drawer[open]::backdrop { opacity: 0; } }

.drawer__head {
  position: sticky; top: 0;
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--sp-3);
  padding: var(--sp-4) var(--sp-5);
  padding-top: calc(var(--sp-4) + env(safe-area-inset-top));
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}
.drawer__close {
  display: inline-flex; align-items: center; justify-content: center;
  gap: var(--sp-2);
  min-height: 48px; min-width: 48px;
  padding-inline: var(--sp-3);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  font-size: 0.8125rem; font-weight: 700;
}
.drawer__body { padding: var(--sp-4) var(--sp-5) var(--sp-12); }
.drawer__foot {
  padding: 0 var(--sp-5) calc(var(--sp-8) + env(safe-area-inset-bottom));
  display: grid; gap: var(--sp-3);
}

.drawer-nav a {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 56px;
  padding-block: var(--sp-2);
  font-size: 1.125rem; font-weight: 650;
  text-decoration: none;
  border-bottom: 1px solid var(--border);
}
.drawer-nav a[aria-current="page"] { color: var(--accent-text); }

/* Accordion inside the drawer — never drill-down (§2.7) */
.acc { border-bottom: 1px solid var(--border); }
.acc__btn {
  display: flex; align-items: center; justify-content: space-between;
  width: 100%;
  min-height: 56px;
  font-size: 1.125rem; font-weight: 650;
  text-align: left;
  touch-action: manipulation;
}
.acc__btn svg { transition: transform var(--dur-4) var(--ease-standard); flex: none; }
.acc__btn[aria-expanded="true"] svg { transform: rotate(180deg); }
.acc__panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--dur-4) var(--ease-standard);
}
.acc__btn[aria-expanded="true"] + .acc__panel { grid-template-rows: 1fr; }
.acc__panel > div { overflow: hidden; }
.acc__panel a {
  display: flex; align-items: center;
  min-height: 48px;
  padding-left: var(--sp-3);
  font-size: 1rem; font-weight: 500;
  color: var(--muted);
  text-decoration: none;
}
.acc__panel > div > :last-child { margin-bottom: var(--sp-3); }

/* --------------------------------------------------------------------------
   8. BOTTOM ACTION BAR  (§2.4 — actions, not tabs)
   -------------------------------------------------------------------------- */
.cta-bar {
  position: fixed;
  inset: auto 0 0 0;
  z-index: 40;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 1fr;
  gap: var(--sp-2);
  min-height: var(--cta-h);
  align-items: center;
  padding: var(--sp-3) max(var(--sp-4), env(safe-area-inset-left))
           calc(var(--sp-3) + env(safe-area-inset-bottom))
           max(var(--sp-4), env(safe-area-inset-right));
  background: var(--surface);
  border-top: 1px solid var(--border);
  transition: translate var(--dur-3) var(--ease-standard);
}
/* Hidden until ~1 viewport of scroll, and near the form/footer */
.cta-bar[data-hidden] { translate: 0 110%; }
.cta-bar .btn { min-height: 3rem; }
@media (min-width: 768px) { .cta-bar { display: none; } }

/* --------------------------------------------------------------------------
   9. HERO  (§10 — 78svh, eased multi-stop scrim §6)
   -------------------------------------------------------------------------- */
.hero {
  position: relative;
  isolation: isolate;
  min-height: 78svh;
  display: flex;
  align-items: flex-end;
  overflow: clip;
}
.hero__media { position: absolute; inset: 0; z-index: 0; }
.hero__media img { width: 100%; height: 100%; object-fit: cover; }

.hero::after {
  content: "";
  position: absolute; inset: 0; z-index: 1;
  pointer-events: none;
  background: linear-gradient(
    to top,
    hsl(0 0% 0% / .82) 0%,
    hsl(0 0% 0% / .62) 22%,
    hsl(0 0% 4% / .34) 48%,
    hsl(0 0% 8% / .10) 72%,
    hsl(0 0% 10% / 0) 100%);
}
@media (max-width: 640px) {
  .hero::after { background-size: 100% 140%; background-position: bottom; }
}

.hero__content {
  position: relative; z-index: 2;
  width: 100%;
  max-width: var(--w-content);
  margin-inline: auto;
  padding: var(--sp-12) var(--gutter) var(--sp-16);
  color: #fff;
}
.hero__content h1 { text-shadow: 0 1px 2px hsl(0 0% 0% / .35); }

/* --------------------------------------------------------------------------
   10. CARDS & RAILS  (§4.3, §3.5)
   -------------------------------------------------------------------------- */
.card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: var(--sp-5);
  transition: transform var(--dur-1) var(--ease-standard);
}
.card:active { transform: scale(0.985); }
/* Shadow lives on a pseudo-element so we animate opacity, never box-shadow */
.card::before {
  content: "";
  position: absolute; inset: 0;
  border-radius: inherit;
  box-shadow: var(--shadow-pop);
  opacity: 0;
  transition: opacity var(--dur-2) var(--ease-standard);
  pointer-events: none;
}
@media (hover: hover) and (pointer: fine) {
  .card:hover::before { opacity: 1; }
}
/* Nested radius: inner = outer − padding */
.card img { border-radius: calc(var(--r-lg) - var(--sp-5)); }

/* Full-bleed rows beat inset cards for one-per-row mobile lists (§4.3) */
.rows { border-top: 1px solid var(--border); }
.rows > * {
  display: block;
  padding-block: var(--sp-5);
  border-bottom: 1px solid var(--border);
  text-decoration: none;
}

.rail {
  display: flex;
  gap: var(--sp-3);
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scroll-snap-type: x proximity;
  scroll-padding-inline: var(--gutter);
  padding-inline: var(--gutter);
  margin-inline: calc(var(--gutter) * -1);
  scrollbar-width: none;
  padding-block-end: var(--sp-2);
}
.rail::-webkit-scrollbar { display: none; }
/* 82% so the next card visibly peeks — the affordance, not arrows */
.rail > * { flex: 0 0 82%; scroll-snap-align: start; }
@media (min-width: 640px) { .rail > * { flex-basis: 46%; } }
@media (min-width: 1024px) { .rail > * { flex-basis: 31%; } }

/* WCAG 2.5.7 — every rail ships real prev/next buttons */
.rail-nav { display: flex; gap: var(--sp-2); margin-top: var(--sp-4); }
.rail-nav button {
  display: inline-flex; align-items: center; justify-content: center;
  width: 48px; height: 48px;
  border: 1px solid var(--border-strong);
  border-radius: var(--r-full);
  touch-action: manipulation;
}
.rail-nav button:active { transform: scale(0.94); }

/* --------------------------------------------------------------------------
   11. FORMS  (§7)
   -------------------------------------------------------------------------- */
.field { display: flex; flex-direction: column; gap: 0.375rem; margin-block-end: var(--sp-5); }
.field label { font-size: 0.9375rem; font-weight: 650; line-height: 1.3; }
.field .hint { font-size: 0.875rem; color: var(--muted); }

.field input,
.field select,
.field textarea {
  min-height: 3.25rem;      /* 52px */
  font-size: 1rem;          /* 16px — blocks iOS auto-zoom */
  padding: 0.875rem 1rem;
  width: 100%;
  background: var(--surface);
  color: var(--fg);
  border: 1.5px solid var(--border-strong);
  border-radius: var(--r-md);
  transition: border-color var(--dur-2) linear;
}
.field textarea { min-height: 7rem; resize: vertical; line-height: 1.5; }
.field select { appearance: none; background-image: var(--select-chevron); background-repeat: no-repeat;
  background-position: right var(--sp-4) center; padding-right: var(--sp-10); }
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--accent); }

/* Autofill: recolor, never suppress — the tint is a useful signal */
input:-webkit-autofill, input:autofill {
  box-shadow: 0 0 0 100px var(--surface) inset;
  -webkit-text-fill-color: var(--fg);
  caret-color: var(--fg);
}

/* Errors below the field, text + icon, never color alone */
.field .err {
  display: flex; align-items: flex-start; gap: var(--sp-2);
  font-size: 0.875rem; font-weight: 600;
  color: var(--danger);
}
.field .err[hidden] { display: none; }
.field[data-invalid] input,
.field[data-invalid] select,
.field[data-invalid] textarea { border-color: var(--danger); }

.req { color: var(--danger); }

/* Multi-step progress (§7.8) */
.steps { display: flex; align-items: center; gap: var(--sp-3); margin-block-end: var(--sp-6); }
.steps__track { flex: 1; height: 4px; background: var(--border); border-radius: var(--r-full); overflow: hidden; }
.steps__fill { height: 100%; background: var(--accent); transition: width var(--dur-4) var(--ease-standard); }
.steps__label { font-size: 0.8125rem; font-weight: 700; color: var(--muted); white-space: nowrap; }

/* --------------------------------------------------------------------------
   12. CLICK-TO-CALL  (§7.5)
   -------------------------------------------------------------------------- */
.tel {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-3);
  min-height: 48px;
  text-decoration: none;
  font-weight: 700;
}
.tel__num { font-size: 1.125rem; letter-spacing: -0.01em; }
.tel__sub { display: block; font-size: 0.75rem; font-weight: 600; color: var(--muted); letter-spacing: 0.02em; }
@media (hover: hover) and (pointer: fine) {
  /* Selectable text on desktop instead of a dead link */
  .tel { pointer-events: none; }
}

/* --------------------------------------------------------------------------
   13. SCROLL-DRIVEN REVEALS  (§5.5 — off-main-thread, max 1 per viewport)
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: no-preference) {
  @supports (animation-timeline: view()) {
    .reveal {
      animation: reveal-up linear both;
      animation-timeline: view();
      animation-range: entry 10% cover 35%;
    }
  }
}
@keyframes reveal-up {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: none; }
}

/* --------------------------------------------------------------------------
   14. VIEW TRANSITIONS  (§5.6 — progressive enhancement, zero cost)
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: no-preference) {
  @view-transition { navigation: auto; }
}
::view-transition-old(root),
::view-transition-new(root) { animation-duration: var(--dur-3); }
.site-footer { view-transition-name: site-footer; }

/* --------------------------------------------------------------------------
   15. REDUCED MOTION — reduce, do not delete (§5.9)
   -------------------------------------------------------------------------- */
@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;
  }
  /* Keep functional feedback */
  .btn, .card { transition: opacity 120ms linear !important; }
  .btn:active, .card:active { transform: none; }
  .drawer, .drawer::backdrop { transition: opacity 120ms linear !important; }
  ::view-transition-old(root), ::view-transition-new(root) { animation: none; }
}

/* --------------------------------------------------------------------------
   16. FOOTER
   -------------------------------------------------------------------------- */
.site-footer {
  background: var(--surface-2);
  border-top: 1px solid var(--border);
  padding-block: var(--sp-12) var(--sp-8);
  font-size: var(--t-sm);
}
.footer-grid {
  display: grid;
  gap: var(--sp-8);
}
@media (min-width: 768px) {
  .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; gap: var(--sp-12); }
}
.footer-grid h3 { font-size: 0.8125rem; letter-spacing: var(--tr-eyebrow); text-transform: uppercase; color: var(--muted); margin-bottom: var(--sp-4); }
.footer-grid li a { display: flex; align-items: center; min-height: 44px; text-decoration: none; color: var(--muted); }
.legal {
  margin-top: var(--sp-10);
  padding-top: var(--sp-6);
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.8125rem;
  display: grid; gap: var(--sp-3);
}

/* Concept chip + disclosure — required on every demo (PRD §8.3) */
.concept-chip {
  display: inline-flex; align-items: center; gap: var(--sp-2);
  padding: 0.375rem var(--sp-3);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-full);
  font-size: 0.6875rem; font-weight: 800;
  letter-spacing: 0.1em; text-transform: uppercase;
}
.disclosure {
  font-size: 0.8125rem;
  color: var(--muted);
  font-style: italic;
  max-width: 60ch;
}