/* =========================================================================
   Tudinous Kryos — Design System (Material Design 3, light "corporate-cryo")
   Single stylesheet. No frameworks. See plan/04-design-system.md
   Order: tokens → reset/base → layout → components → sections → utilities →
          responsive → reduced-motion → dark scheme
   ========================================================================= */

/* ----------------------------------------------------------------- TOKENS */
:root {
  /* Colour — M3 tonal roles (light) */
  --primary: #00629e;
  --on-primary: #ffffff;
  --primary-container: #cfe5ff;
  --on-primary-container: #001d34;
  --secondary: #51606f;
  --on-secondary: #ffffff;
  --secondary-container: #d5e4f7;
  --on-secondary-container: #0d1d2a;
  --tertiary: #9c4146;
  --on-tertiary: #ffffff;
  --tertiary-container: #ffdad8;
  --on-tertiary-container: #410008;
  --error: #ba1a1a;
  --on-error: #ffffff;

  --background: #fbfcff;
  --on-background: #1a1c1e;
  --surface: #fbfcff;
  --on-surface: #1a1c1e;
  --surface-variant: #dee3eb;
  --on-surface-variant: #42474e;
  --surface-container-low: #f3f4f9;
  --surface-container: #eff1f5;
  --surface-container-high: #e7e9ee;
  --outline: #72777f;
  --outline-variant: #c2c7cf;
  --scrim: #000000;

  /* Type */
  --font-display: "Roboto Serif", Georgia, "Times New Roman", serif;
  --font-body: "Roboto Flex", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;

  /* Spacing — 4dp grid */
  --space-1: 4px;  --space-2: 8px;  --space-3: 12px; --space-4: 16px;
  --space-5: 24px; --space-6: 32px; --space-7: 48px; --space-8: 64px; --space-9: 96px;
  --content-max: 1200px;
  --prose-max: 72ch;
  --section-pad: clamp(48px, 8vw, 96px);

  /* Shape */
  --radius-xs: 4px; --radius-sm: 8px; --radius-md: 12px;
  --radius-lg: 16px; --radius-xl: 28px; --radius-full: 999px;

  /* Elevation */
  --elev-1: 0 1px 2px rgba(0,0,0,.30), 0 1px 3px 1px rgba(0,0,0,.15);
  --elev-2: 0 1px 2px rgba(0,0,0,.30), 0 2px 6px 2px rgba(0,0,0,.15);
  --elev-3: 0 4px 8px 3px rgba(0,0,0,.15), 0 1px 3px rgba(0,0,0,.30);

  /* Motion */
  --motion-short: 150ms;
  --motion-medium: 250ms;
  --motion-long: 400ms;
  --easing: cubic-bezier(.2, 0, 0, 1);
}

/* ------------------------------------------------------------- RESET/BASE */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { font-size: 100%; -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
html { scroll-padding-top: 88px; } /* offset sticky app bar for anchor links */
body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--on-background);
  background: var(--background);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img, svg, iframe { display: block; max-width: 100%; }
img { height: auto; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
ul, ol { padding-left: 1.25rem; }
h1, h2, h3, h4 { font-family: var(--font-display); line-height: 1.15; font-weight: 700; color: var(--on-surface); }
h1 { font-size: clamp(2.25rem, 5vw, 3.25rem); line-height: 1.08; letter-spacing: -.01em; }
h2 { font-size: clamp(1.75rem, 3.2vw, 2.25rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); font-weight: 600; }
p { max-width: var(--prose-max); }

/* Material Symbols */
.material-symbols-rounded {
  font-variation-settings: "FILL" 0, "wght" 400, "GRAD" 0, "opsz" 24;
  line-height: 1;
  vertical-align: middle;
  user-select: none;
}

/* ----------------------------------------------------- ACCESSIBILITY HELP */
.skip-link {
  position: absolute;
  left: var(--space-4); top: -100px;
  z-index: 1100;
  background: var(--primary);
  color: var(--on-primary);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: top var(--motion-short) var(--easing);
}
.skip-link:focus { top: var(--space-3); text-decoration: none; }

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

:where(a, button, input, [tabindex]):focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 2px;
  border-radius: var(--radius-xs);
}

/* ----------------------------------------------------------------- LAYOUT */
.container {
  width: 100%;
  max-width: var(--content-max);
  margin-inline: auto;
  padding-inline: clamp(16px, 5vw, 40px);
}
.section { padding-block: var(--section-pad); }
.section--tint { background: var(--surface-container); }
.section--primary { background: var(--primary-container); color: var(--on-primary-container); }
.section__head { max-width: 60ch; margin-bottom: var(--space-7); }
.section__head--center { margin-inline: auto; text-align: center; }
.eyebrow {
  font-family: var(--font-body);
  text-transform: uppercase;
  letter-spacing: .1em;
  font-size: .8125rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: var(--space-2);
}
.lead { font-size: 1.125rem; color: var(--on-surface-variant); }

.grid { display: grid; gap: var(--space-5); }
.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(260px, 1fr)); }

/* Intro text + side fact card (prevents a lone narrow prose column on wide screens) */
.layout-aside { display: grid; gap: clamp(24px, 5vw, 56px); grid-template-columns: 1.55fr 1fr; align-items: start; }
.factlist { display: grid; gap: var(--space-3); margin: 0; }
.factlist > div { display: grid; gap: 2px; padding-bottom: var(--space-3); border-bottom: 1px solid var(--outline-variant); }
.factlist > div:last-child { border-bottom: none; padding-bottom: 0; }
.factlist dt { font-size: .75rem; text-transform: uppercase; letter-spacing: .08em; font-weight: 700; color: var(--primary); }
.factlist dd { margin: 0; color: var(--on-surface); }
@media (max-width: 860px) { .layout-aside { grid-template-columns: 1fr; } }

/* ---------------------------------------------------------------- BUTTONS */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 48px;
  padding: 0 var(--space-6);
  border-radius: var(--radius-full);
  border: none;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: .01em;
  cursor: pointer;
  background: var(--primary);
  color: var(--on-primary);
  transition: box-shadow var(--motion-short) var(--easing),
              background var(--motion-short) var(--easing),
              transform var(--motion-short) var(--easing);
  text-decoration: none;
}
.btn:hover { box-shadow: var(--elev-2); text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn--tonal { background: var(--secondary-container); color: var(--on-secondary-container); }
.btn--outlined { background: transparent; color: var(--primary); border: 1px solid var(--outline); }
.btn--outlined:hover { background: rgba(0,98,158,.08); box-shadow: none; }
.btn--text { background: transparent; color: var(--primary); padding-inline: var(--space-3); }
.btn--text:hover { background: rgba(0,98,158,.08); box-shadow: none; }
.btn--on-dark { background: #fff; color: var(--primary); }
.btn--large { min-height: 56px; font-size: 1.0625rem; padding-inline: var(--space-7); }
.btn .material-symbols-rounded { font-size: 1.25rem; }

.btn-row { display: flex; flex-wrap: wrap; gap: var(--space-4); }
.btn-row--center { justify-content: center; }

/* ------------------------------------------------------------------- CHIP */
.chip {
  display: inline-flex; align-items: center; gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  background: var(--surface-container-high);
  color: var(--on-surface-variant);
  font-size: .9375rem; font-weight: 600;
  border: 1px solid var(--outline-variant);
}
.chip .material-symbols-rounded { font-size: 1.125rem; color: var(--primary); }
.chip-row { display: flex; flex-wrap: wrap; gap: var(--space-3); }

/* ------------------------------------------------------------------ CARDS */
.card {
  background: var(--surface);
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--elev-1);
  transition: box-shadow var(--motion-medium) var(--easing),
              transform var(--motion-medium) var(--easing);
  height: 100%;
}
a.card { color: inherit; text-decoration: none; display: block; }
a.card:hover, .card--interactive:hover { box-shadow: var(--elev-3); transform: translateY(-4px); }
.card__icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 56px; height: 56px;
  border-radius: var(--radius-md);
  background: var(--primary-container);
  color: var(--on-primary-container);
  margin-bottom: var(--space-4);
}
.card__icon .material-symbols-rounded { font-size: 2rem; }
.card__title { margin-bottom: var(--space-2); }
.card__text { color: var(--on-surface-variant); }
.card__link {
  display: inline-flex; align-items: center; gap: var(--space-1);
  margin-top: var(--space-4); font-weight: 600;
}
.card__link .material-symbols-rounded { font-size: 1.25rem; transition: transform var(--motion-short) var(--easing); }
a.card:hover .card__link .material-symbols-rounded { transform: translateX(4px); }

/* --------------------------------------------------------------- APP BAR */
.appbar {
  position: sticky; top: 0; z-index: 1000;
  background: var(--surface);
  border-bottom: 1px solid var(--outline-variant);
  transition: box-shadow var(--motion-short) var(--easing);
}
.appbar.is-scrolled { box-shadow: var(--elev-2); }
.appbar__inner {
  display: flex; align-items: center; flex-wrap: nowrap;
  gap: var(--space-3);
  min-height: 72px;
}
/* Logo sits left and pushes everything else to the right edge */
.appbar__brand { display: inline-flex; align-items: center; margin-right: auto; flex: 0 0 auto; background: white; padding: 12px; border-radius: var(--radius-sm); }
.appbar__brand img { height: 32px; width: auto; max-width: 210px; }
.appbar__nav { display: flex; align-items: center; gap: var(--space-2); }
.navlist {
  display: flex; align-items: center; flex-wrap: nowrap; gap: 2px;
  list-style: none; margin: 0; padding: 0;
}
.navlist a {
  display: inline-flex; align-items: center; white-space: nowrap;
  padding: var(--space-2) 10px;
  border-radius: var(--radius-sm);
  color: var(--on-surface-variant);
  font-weight: 600; font-size: .9rem;
}
.navlist a:hover { background: var(--surface-container-high); text-decoration: none; color: var(--on-surface); }
.navlist a[aria-current="page"] { color: var(--primary); background: var(--primary-container); }
.appbar__cta { display: inline-flex; flex: 0 0 auto; }
/* Icon buttons in the bar: theme toggle + hamburger */
.theme-toggle, .nav-toggle {
  display: inline-flex;
  align-items: center; justify-content: center;
  width: 48px; height: 48px;
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--on-surface);
  cursor: pointer;
  flex: 0 0 auto;
}
.theme-toggle:hover, .nav-toggle:hover { background: var(--surface-container-high); }
.theme-toggle .material-symbols-rounded { font-size: 1.5rem; }
.nav-toggle { display: none; }
.nav-toggle .material-symbols-rounded { font-size: 1.75rem; }

/* ------------------------------------------------------------------- HERO */
.hero {
  position: relative;
  display: flex; align-items: center;
  min-height: clamp(420px, 70vh, 640px);
  padding-block: var(--section-pad);
  background-color: #0a1620;
  background-size: cover;
  background-position: center;
  color: #fff;
  isolation: isolate;
}
.hero::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: linear-gradient(90deg, rgba(4,12,20,.82) 0%, rgba(4,12,20,.62) 55%, rgba(4,12,20,.40) 100%);
}
.hero--home { min-height: clamp(520px, 86vh, 760px); }
.hero__content { max-width: 760px; }

/* ---------------------------------------------------- HOME HERO (split, light)
   Text left, crisp image right on a light surface, with a soft cryo-frost
   accent behind the image. Both text and image stay sharp and prominent. */
.home-hero {
  position: relative;
  overflow: clip;
  background:
    radial-gradient(120% 90% at 100% 0%, var(--primary-container) 0%, transparent 55%),
    var(--surface);
  padding-block: clamp(48px, 7vw, 104px);
}
.home-hero__grid {
  display: grid; grid-template-columns: 1.05fr 1fr;
  gap: clamp(32px, 5vw, 72px); align-items: center;
}
.home-hero__content { max-width: 60ch; }
.home-hero h1 { font-size: clamp(2.5rem, 4.6vw, 3.75rem); margin-top: var(--space-2); }
.home-hero__tagline {
  font-size: clamp(1.0625rem, 1.5vw, 1.3125rem);
  color: var(--on-surface-variant);
  margin-top: var(--space-5);
}
.home-hero .btn-row { margin-top: var(--space-7); }
.home-hero__chips { margin-top: var(--space-6); list-style: none; padding: 0; }

.home-hero__media { position: relative; isolation: isolate; }
.home-hero__media img {
  position: relative; z-index: 1;
  width: 100%; aspect-ratio: 4 / 3; object-fit: cover;
  border-radius: var(--radius-xl);
  box-shadow: var(--elev-3);
}
/* tinted accent panel offset behind the image (depth) */
.home-hero__media::after {
  content: ""; position: absolute; z-index: 0;
  inset: 22px -22px -22px 28px;
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-container) 100%);
  opacity: .35;
}
/* soft frost orb top-left */
.home-hero__media::before {
  content: ""; position: absolute; z-index: 0;
  width: 46%; aspect-ratio: 1; left: -9%; top: -12%;
  background: radial-gradient(circle, var(--primary-container) 0%, transparent 70%);
  filter: blur(6px);
  opacity: .9;
}
@media (max-width: 860px) {
  .home-hero__grid { grid-template-columns: 1fr; gap: var(--space-7); }
  .home-hero__content { max-width: none; }
  .home-hero__media img { aspect-ratio: 16 / 10; }
  .home-hero__media::after { inset: 16px -12px -16px 16px; }
}
.hero h1 { color: #fff; }
.hero__tagline { font-size: clamp(1.0625rem, 2.2vw, 1.375rem); color: rgba(255,255,255,.92); margin-top: var(--space-4); max-width: 56ch; }
.hero .btn-row { margin-top: var(--space-7); }
.hero--inner { min-height: clamp(300px, 42vh, 420px); }
.hero__breadcrumb { margin-bottom: var(--space-3); }

/* -------------------------------------------------------------- POSITIONING STRIP */
/* Fixed deep cryo-blue (does NOT use the --primary token, which inverts to a
   light tint in dark mode and would wash out the white text). */
.strip {
  background: #00497a;
  color: #ffffff;
}
.strip h2 { color: var(--on-primary-container); }
.strip p { max-width: none; color: rgba(255, 255, 255, .94); }
.strip__grid { display: grid; gap: var(--space-6); grid-template-columns: 1.4fr 1fr; align-items: center; }
.strip__stats { display: flex; gap: var(--space-6); flex-wrap: wrap; }
.stat__num { font-family: var(--font-display); font-size: clamp(1.75rem, 4vw, 2.5rem); font-weight: 700; color: var(--on-primary-container); }
.stat__label { font-size: .9375rem; color: rgba(255, 255, 255, .92); }

/* ------------------------------------------------------------- MEDIA/PROSE */
.media {
  display: grid; gap: clamp(24px, 5vw, 64px);
  grid-template-columns: 1fr 1fr; align-items: center;
}
.media--reverse .media__text { order: 2; }
.media__img img, .media__img {
  border-radius: var(--radius-xl);
  box-shadow: var(--elev-2);
  width: 100%;
}
.prose > * + * { margin-top: var(--space-4); }
.prose h2 + p, .prose h3 + p { margin-top: var(--space-3); }

/* ------------------------------------------------------------------- STEPS */
.steps { list-style: none; padding: 0; counter-reset: step; display: grid; gap: var(--space-4); }
.steps li {
  position: relative;
  display: grid; grid-template-columns: 48px 1fr; gap: var(--space-4); align-items: start;
  background: var(--surface); border: 1px solid var(--outline-variant);
  border-radius: var(--radius-md); padding: var(--space-4) var(--space-5);
}
.steps li::before {
  counter-increment: step; content: counter(step);
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; border-radius: var(--radius-full);
  background: var(--primary); color: var(--on-primary);
  font-family: var(--font-display); font-weight: 700;
}
.steps strong { display: block; font-size: 1.0625rem; }
.steps p { color: var(--on-surface-variant); margin-top: 2px; }

/* ----------------------------------------------------------- LIST FEATURES */
.checklist { list-style: none; padding: 0; display: grid; gap: var(--space-3); }
.checklist li { display: grid; grid-template-columns: 28px 1fr; gap: var(--space-2); align-items: start; }
.checklist .material-symbols-rounded { color: var(--primary); font-size: 1.5rem; }

/* ----------------------------------------------------------- PARTNER LOGOS */
.logo-strip { display: flex; flex-wrap: wrap; gap: var(--space-5); align-items: center; justify-content: center; }
.logo-strip__item {
  display: flex; align-items: center; justify-content: center;
  background: #fff; border: 1px solid var(--outline-variant);
  border-radius: var(--radius-md); padding: var(--space-4) var(--space-5);
  min-height: 84px; min-width: 180px; flex: 1 1 180px; max-width: 240px;
  transition: box-shadow var(--motion-short) var(--easing), transform var(--motion-short) var(--easing);
}
.logo-strip__item:hover { box-shadow: var(--elev-2); transform: translateY(-2px); }
.logo-strip__item img { max-height: 48px; width: auto; }

/* Partner detail blocks */
.partner {
  display: grid; grid-template-columns: 200px 1fr; gap: var(--space-6); align-items: center;
  background: var(--surface); border: 1px solid var(--outline-variant);
  border-radius: var(--radius-lg); padding: var(--space-6);
}
.partner__logo { display: flex; align-items: center; justify-content: center; background:#fff; border-radius: var(--radius-md); padding: var(--space-4); min-height: 96px; }
.partner__logo img { max-height: 64px; width: auto; }

/* --------------------------------------------------------------- CONTACT */
.contact-card { display: grid; grid-template-columns: 56px 1fr; gap: var(--space-4); align-items: start; }
.contact-card .card__icon { margin-bottom: 0; }
.contact-card a { font-weight: 600; word-break: break-word; }
.map-embed { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--elev-1); border: 1px solid var(--outline-variant); }
.map-embed iframe { width: 100%; height: 420px; border: 0; }

/* --------------------------------------------------------------- CTA BAND */
.cta-band { background: var(--primary-container); color: var(--on-primary-container); }
.cta-band__inner { text-align: center; max-width: 64ch; margin-inline: auto; }
.cta-band h2 { color: var(--on-primary-container); }
.cta-band p { margin-inline: auto; margin-top: var(--space-3); color: var(--on-primary-container); }
.cta-band .btn-row { margin-top: var(--space-6); }

/* --------------------------------------------------------- FOUNDER BLOCK */
.founder { display: grid; grid-template-columns: auto 1fr; gap: var(--space-6); align-items: center; }
.founder__avatar {
  width: 120px; height: 120px; border-radius: var(--radius-full);
  background: var(--primary-container); color: var(--on-primary-container);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display); font-size: 2.5rem; font-weight: 700; flex-shrink: 0;
}
.founder__credentials { color: var(--on-surface-variant); font-size: .9375rem; margin-top: var(--space-2); }

/* ------------------------------------------------------------------ FOOTER */
.footer { background: #0d1b27; color: #c7d2dc; padding-block: var(--space-8) var(--space-5); }
.footer a { color: #cfe5ff; }
.footer__grid { display: grid; gap: var(--space-7); grid-template-columns: 1.6fr 1fr 1.4fr; }
.footer__brand img { height: 40px; width: auto; background:#fff; border-radius: var(--radius-xs); padding: 6px 8px; }
.footer__brand p { color: #9fb2c0; margin-top: var(--space-4); max-width: 40ch; }
.footer h2 { color: #fff; font-size: 1.0625rem; font-family: var(--font-body); font-weight: 700; margin-bottom: var(--space-4); text-transform: uppercase; letter-spacing: .06em; }
.footer__links { list-style: none; padding: 0; display: grid; gap: var(--space-2); }
.footer__contact { display: grid; gap: var(--space-3); list-style: none; padding: 0; }
.footer__contact li { display: grid; grid-template-columns: 24px 1fr; gap: var(--space-2); align-items: start; }
.footer__contact .material-symbols-rounded { color: #7fb8e6; font-size: 1.25rem; }
.footer__bottom { border-top: 1px solid rgba(255,255,255,.12); margin-top: var(--space-7); padding-top: var(--space-5); display: flex; flex-wrap: wrap; gap: var(--space-3); justify-content: space-between; color: #8ea3b3; font-size: .875rem; }
.footer__reg { color: #8ea3b3; font-size: .8125rem; margin-top: var(--space-3); }

/* ----------------------------------------------------------- WHATSAPP FAB */
.wa-fab {
  position: fixed; right: 20px; bottom: 20px; z-index: 1050;
  width: 56px; height: 56px; border-radius: var(--radius-full);
  background: #25d366; display: flex; align-items: center; justify-content: center;
  box-shadow: var(--elev-3); transition: transform var(--motion-short) var(--easing);
}
.wa-fab:hover { transform: scale(1.08); }
.wa-fab svg { width: 30px; height: 30px; }

/* ------------------------------------------------------------- 404 PAGE */
.errorpage { min-height: 70vh; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; gap: var(--space-4); padding: var(--space-8) var(--space-4); }
.errorpage .code { font-family: var(--font-display); font-size: clamp(5rem, 18vw, 10rem); line-height: 1; color: var(--primary); }

/* ----------------------------------------------------------- UTILITIES */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.flow > * + * { margin-top: var(--space-4); }

/* --------------------------------------------------------- SCROLL REVEAL */
[data-reveal] { opacity: 0; transform: translateY(24px); transition: opacity var(--motion-long) var(--easing), transform var(--motion-long) var(--easing); }
[data-reveal].is-visible { opacity: 1; transform: none; }

/* ---------------------------------------------------------- RESPONSIVE */
@media (max-width: 960px) {
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .strip__grid { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .media, .media--reverse .media__text { grid-template-columns: 1fr; }
  .media--reverse .media__text { order: 0; }
  .media__img { order: -1; }
}
/* Below 1200px the full nav can't sit on one line, so collapse to a drawer */
@media (max-width: 1199px) {
  .appbar__cta { display: none; }
  .nav-toggle { display: inline-flex; }
  .appbar__nav { position: fixed; inset: 72px 0 auto 0;
    background: var(--surface); border-bottom: 1px solid var(--outline-variant);
    box-shadow: var(--elev-3);
    flex-direction: column; align-items: stretch; gap: 0;
    padding: var(--space-3) clamp(16px,5vw,40px) var(--space-5);
    transform: translateY(-130%); transition: transform var(--motion-medium) var(--easing);
    max-height: calc(100vh - 72px); overflow-y: auto;
  }
  .appbar__nav.is-open { transform: translateY(0); }
  .navlist { flex-direction: column; align-items: stretch; gap: var(--space-1); width: 100%; }
  .navlist a { padding: var(--space-3); font-size: 1.0625rem; }
  .appbar__nav .btn { margin-top: var(--space-3); }
  .appbar__nav .appbar__cta-mobile { display: inline-flex; }
}
@media (min-width: 1200px) { .appbar__cta-mobile { display: none; } }
@media (max-width: 560px) {
  .grid--4, .grid--3, .grid--2, .footer__grid { grid-template-columns: 1fr; }
  .founder { grid-template-columns: 1fr; text-align: center; justify-items: center; }
  .partner { grid-template-columns: 1fr; text-align: center; justify-items: center; }
  .contact-card { grid-template-columns: 1fr; justify-items: start; }
}

/* ------------------------------------------------------- REDUCED MOTION */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
  [data-reveal] { opacity: 1; transform: none; }
  a.card:hover, .card--interactive:hover, .logo-strip__item:hover, .wa-fab:hover { transform: none; }
}

/* ------------------------------------------------------------ DARK THEME
   Two triggers, same result:
   1. The user explicitly chose dark  →  html[data-theme="dark"]
   2. No explicit choice + OS prefers dark  →  the @media block below
   (When the user chooses light, html[data-theme="light"] keeps the light :root
   tokens and the @media block is skipped.) The dark token values are kept in
   one custom property block (--dk-*) so they are defined only once. */
:root {
  --dk-primary: #99ccff;
  --dk-on-primary: #003355;
  --dk-primary-container: #004a78;
  --dk-on-primary-container: #cfe5ff;
  --dk-secondary: #b9c8da;
  --dk-on-secondary: #243240;
  --dk-secondary-container: #3a4857;
  --dk-on-secondary-container: #d5e4f7;
  --dk-tertiary: #ffb3b2;
  --dk-on-tertiary: #5f1418;
  --dk-tertiary-container: #7e2a2d;
  --dk-on-tertiary-container: #ffdad8;
  --dk-background: #101417;
  --dk-on-background: #e2e2e6;
  --dk-surface: #101417;
  --dk-on-surface: #e2e2e6;
  --dk-surface-variant: #42474e;
  --dk-on-surface-variant: #c2c7cf;
  --dk-surface-container-low: #181c20;
  --dk-surface-container: #1c2024;
  --dk-surface-container-high: #262a2e;
  --dk-outline: #8c9199;
  --dk-outline-variant: #42474e;
}

/* Map the dark values onto the live tokens (explicit user choice) */
:root[data-theme="dark"] {
  --primary: var(--dk-primary);
  --on-primary: var(--dk-on-primary);
  --primary-container: var(--dk-primary-container);
  --on-primary-container: var(--dk-on-primary-container);
  --secondary: var(--dk-secondary);
  --on-secondary: var(--dk-on-secondary);
  --secondary-container: var(--dk-secondary-container);
  --on-secondary-container: var(--dk-on-secondary-container);
  --tertiary: var(--dk-tertiary);
  --on-tertiary: var(--dk-on-tertiary);
  --tertiary-container: var(--dk-tertiary-container);
  --on-tertiary-container: var(--dk-on-tertiary-container);
  --background: var(--dk-background);
  --on-background: var(--dk-on-background);
  --surface: var(--dk-surface);
  --on-surface: var(--dk-on-surface);
  --surface-variant: var(--dk-surface-variant);
  --on-surface-variant: var(--dk-on-surface-variant);
  --surface-container-low: var(--dk-surface-container-low);
  --surface-container: var(--dk-surface-container);
  --surface-container-high: var(--dk-surface-container-high);
  --outline: var(--dk-outline);
  --outline-variant: var(--dk-outline-variant);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --primary: var(--dk-primary);
    --on-primary: var(--dk-on-primary);
    --primary-container: var(--dk-primary-container);
    --on-primary-container: var(--dk-on-primary-container);
    --secondary: var(--dk-secondary);
    --on-secondary: var(--dk-on-secondary);
    --secondary-container: var(--dk-secondary-container);
    --on-secondary-container: var(--dk-on-secondary-container);
    --tertiary: var(--dk-tertiary);
    --on-tertiary: var(--dk-on-tertiary);
    --tertiary-container: var(--dk-tertiary-container);
    --on-tertiary-container: var(--dk-on-tertiary-container);
    --background: var(--dk-background);
    --on-background: var(--dk-on-background);
    --surface: var(--dk-surface);
    --on-surface: var(--dk-on-surface);
    --surface-variant: var(--dk-surface-variant);
    --on-surface-variant: var(--dk-on-surface-variant);
    --surface-container-low: var(--dk-surface-container-low);
    --surface-container: var(--dk-surface-container);
    --surface-container-high: var(--dk-surface-container-high);
    --outline: var(--dk-outline);
    --outline-variant: var(--dk-outline-variant);
  }
}

/* Dark-theme component tweaks (apply whenever dark tokens are active) */
:root[data-theme="dark"] .logo-strip__item,
:root[data-theme="dark"] .partner__logo { background: #f1f3f7; }
:root[data-theme="dark"] .btn--on-dark { background: var(--primary); color: var(--on-primary); }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .logo-strip__item,
  :root:not([data-theme="light"]) .partner__logo { background: #f1f3f7; }
  :root:not([data-theme="light"]) .btn--on-dark { background: var(--primary); color: var(--on-primary); }
}