/* ==========================================================================
   Example Domain — shared design system
   Single source of truth for tokens, chrome and reusable components.
   Every page links this file; do not redefine these tokens elsewhere.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. DESIGN TOKENS
   -------------------------------------------------------------------------- */
:root {
  /* Palette — calm editorial monochrome, built on the brand (#eee / #222) */
  --paper:        #eeeeec;
  --paper-deep:   #e6e5e1;
  --surface:      #f7f6f3;
  --surface-alt:  #ffffff;
  --ink:          #222222;
  --ink-soft:     #565650;
  --ink-mute:     #8a8a82;
  --line:         #d8d7d1;
  --line-strong:  #b9b8b1;
  --invert-bg:    #222222;
  --invert-ink:   #f4f3ef;
  --focus:        #222222;

  /* Typography */
  --font-display: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia,
                  "Times New Roman", Times, serif;
  --font-body:    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
                  "Helvetica Neue", Arial, sans-serif;
  --font-mono:    ui-monospace, "SFMono-Regular", "Menlo", Consolas, monospace;

  --weight-regular: 400;
  --weight-medium:  500;
  --weight-bold:    700;

  /* Fluid modular type scale (ratio ~1.25) */
  --step--1: clamp(0.8125rem, 0.79rem + 0.12vw, 0.875rem);
  --step-0:  clamp(1rem,     0.97rem + 0.15vw, 1.0625rem);
  --step-1:  clamp(1.1875rem, 1.13rem + 0.3vw,  1.375rem);
  --step-2:  clamp(1.5rem,   1.4rem  + 0.5vw,   1.75rem);
  --step-3:  clamp(1.9rem,   1.7rem  + 0.9vw,   2.4rem);
  --step-4:  clamp(2.4rem,   2.05rem + 1.6vw,   3.25rem);
  --step-5:  clamp(3rem,     2.3rem  + 3vw,     4.75rem);
  --step-6:  clamp(3.5rem,   1.9rem  + 7.2vw,   8rem);

  --leading-tight:  1.02;
  --leading-snug:   1.15;
  --leading-normal: 1.55;
  --tracking-wide:  0.14em;
  --tracking-tight: -0.015em;

  /* Spacing scale (8px base) */
  --space-3xs: 0.25rem;
  --space-2xs: 0.5rem;
  --space-xs:  0.75rem;
  --space-sm:  1rem;
  --space-md:  1.5rem;
  --space-lg:  2rem;
  --space-xl:  3rem;
  --space-2xl: 4.5rem;
  --space-3xl: 7rem;
  --space-4xl: 10rem;
  --section-y: clamp(3.5rem, 8vw, 7rem);

  /* Layout */
  --container-max: 1240px;
  --container-pad: clamp(1.25rem, 5vw, 3.5rem);
  --measure: 34rem;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-pill: 999px;

  /* Elevation */
  --shadow-sm: 0 1px 2px rgba(34, 34, 34, 0.06);
  --shadow-md: 0 12px 30px -18px rgba(34, 34, 34, 0.35);

  /* Motion */
  --ease-out:   cubic-bezier(0.22, 1, 0.36, 1);
  --ease-inout: cubic-bezier(0.65, 0, 0.35, 1);
  --dur-fast:   160ms;
  --dur:        280ms;
  --dur-slow:   640ms;
  --dur-reveal: 720ms;
}

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

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--step-0);
  line-height: var(--leading-normal);
  font-weight: var(--weight-regular);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: var(--weight-regular);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  margin: 0;
}

p { margin: 0 0 var(--space-sm); }
p:last-child { margin-bottom: 0; }

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
  border-radius: 2px;
}

::selection { background: var(--ink); color: var(--invert-ink); }

/* --------------------------------------------------------------------------
   3. LAYOUT PRIMITIVES
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.section { padding-block: var(--section-y); }
.section--tight { padding-block: calc(var(--section-y) * 0.6); }

.stack > * + * { margin-top: var(--space-md); }

/* Kicker / eyebrow label with a leading rule, as in the reference */
.kicker {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--step--1);
  font-weight: var(--weight-bold);
  letter-spacing: 0.06em;
  text-transform: none;
  color: var(--ink);
}
.kicker::before {
  content: "";
  width: clamp(2rem, 4vw, 3.5rem);
  height: 2px;
  background: var(--ink);
}

.rule {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 0;
}

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

/* --------------------------------------------------------------------------
   4. BUTTONS
   -------------------------------------------------------------------------- */
.btn {
  --btn-bg: var(--invert-bg);
  --btn-ink: var(--invert-ink);
  --btn-border: var(--invert-bg);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2xs);
  padding: 0.7em 1.4em;
  background: var(--btn-bg);
  color: var(--btn-ink);
  border: 1px solid var(--btn-border);
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-size: var(--step--1);
  font-weight: var(--weight-bold);
  line-height: 1;
  cursor: pointer;
  white-space: nowrap;
  transition: background var(--dur-fast) var(--ease-out),
              color var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out),
              transform var(--dur-fast) var(--ease-out);
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn--ghost {
  --btn-bg: transparent;
  --btn-ink: var(--ink);
  --btn-border: var(--line-strong);
}
.btn--ghost:hover { --btn-bg: var(--ink); --btn-ink: var(--invert-ink); --btn-border: var(--ink); }

.btn--light {
  --btn-bg: var(--invert-ink);
  --btn-ink: var(--ink);
  --btn-border: var(--invert-ink);
}

.btn--block { width: 100%; }

/* Language / filter pills */
.pill {
  display: inline-flex;
  align-items: center;
  padding: 0.5em 1.1em;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--ink);
  font-size: var(--step--1);
  font-weight: var(--weight-medium);
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease-out),
              color var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out);
}
.pill:hover { border-color: var(--ink); }
.pill--active {
  background: var(--invert-bg);
  border-color: var(--invert-bg);
  color: var(--invert-ink);
}
.pill-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2xs);
}

/* --------------------------------------------------------------------------
   5. SITE CHROME — header / nav / footer
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--line);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
  min-height: 76px;
}

.site-brand {
  font-family: var(--font-display);
  font-size: var(--step-2);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-tight);
  line-height: 1;
  white-space: nowrap;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 3vw, 2.5rem);
}
.site-nav__link {
  font-size: var(--step--1);
  font-weight: var(--weight-medium);
  color: var(--ink);
  padding: 0.35em 0;
  position: relative;
  transition: color var(--dur-fast) var(--ease-out);
}
.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur) var(--ease-out);
}
.site-nav__link:hover::after,
.site-nav__link[aria-current="page"]::after { transform: scaleX(1); }

.site-header__cta { flex: none; }

/* Mobile toggle (hamburger) */
.site-nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-pill);
  cursor: pointer;
  padding: 0;
}
.site-nav-toggle__bar,
.site-nav-toggle__bar::before,
.site-nav-toggle__bar::after {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--ink);
  transition: transform var(--dur) var(--ease-out), opacity var(--dur-fast) var(--ease-out);
}
.site-nav-toggle__bar { position: relative; }
.site-nav-toggle__bar::before,
.site-nav-toggle__bar::after { content: ""; position: absolute; left: 0; }
.site-nav-toggle__bar::before { top: -6px; }
.site-nav-toggle__bar::after { top: 6px; }
.site-nav-toggle[aria-expanded="true"] .site-nav-toggle__bar { background: transparent; }
.site-nav-toggle[aria-expanded="true"] .site-nav-toggle__bar::before { transform: translateY(6px) rotate(45deg); }
.site-nav-toggle[aria-expanded="true"] .site-nav-toggle__bar::after { transform: translateY(-6px) rotate(-45deg); }

/* Mobile nav behaviour */
@media (max-width: 820px) {
  .site-nav-toggle { display: inline-flex; }

  .site-nav {
    position: absolute;
    inset: 100% 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--space-sm) var(--container-pad) var(--space-lg);
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--dur) var(--ease-out), transform var(--dur) var(--ease-out);
  }
  .site-nav.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .site-nav__link {
    padding: var(--space-xs) 0;
    border-bottom: 1px solid var(--line);
    font-size: var(--step-0);
  }
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  background: var(--paper-deep);
  color: var(--ink);
  padding-block: var(--space-2xl) var(--space-lg);
}
.site-footer__grid {
  display: grid;
  grid-template-columns: 1.6fr repeat(3, 1fr);
  gap: var(--space-xl);
}
.site-footer__brand {
  font-family: var(--font-display);
  font-size: var(--step-2);
  font-weight: var(--weight-bold);
  line-height: 1.1;
  margin-bottom: var(--space-sm);
}
.site-footer__blurb { color: var(--ink-soft); max-width: 30ch; }
.site-footer__col-title {
  font-family: var(--font-body);
  font-size: var(--step--1);
  font-weight: var(--weight-bold);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  color: var(--ink-soft);
  margin-bottom: var(--space-sm);
}
.site-footer__list { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--space-xs); }
.site-footer__list a {
  color: var(--ink-soft);
  font-size: var(--step--1);
  transition: color var(--dur-fast) var(--ease-out);
}
.site-footer__list a:hover { color: var(--ink); }
.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  margin-top: var(--space-xl);
  padding-top: var(--space-md);
  border-top: 1px solid var(--line);
  color: var(--ink-mute);
  font-size: var(--step--1);
}

@media (max-width: 820px) {
  .site-footer__grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 520px) {
  .site-footer__grid { grid-template-columns: 1fr; }
}

/* --------------------------------------------------------------------------
   6. EDITORIAL CONTENT COMPONENTS (hero, media, sections, cards)
   -------------------------------------------------------------------------- */
.hero { padding-block: clamp(2.5rem, 6vw, 5.5rem); }
.hero__grid {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: clamp(2rem, 6vw, 5rem);
  align-items: start;
}
.hero__title {
  font-size: var(--step-6);
  line-height: var(--leading-tight);
  margin-block: var(--space-sm) var(--space-md);
}
.hero__lead {
  font-size: var(--step-1);
  color: var(--ink-soft);
  max-width: var(--measure);
  margin-bottom: var(--space-lg);
}
@media (max-width: 900px) {
  .hero__grid { grid-template-columns: 1fr; }
}

.figure { margin: 0; }
.figure__frame {
  overflow: hidden;
  border-radius: var(--radius-md);
  background: var(--surface);
  aspect-ratio: 4 / 3;
}
.figure__frame img { width: 100%; height: 100%; object-fit: cover; }
.figure__caption {
  margin-top: var(--space-sm);
  color: var(--ink-soft);
  font-size: var(--step--1);
  font-style: italic;
}

.section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}
.section__title {
  font-size: var(--step-4);
  line-height: var(--leading-snug);
}
.section__note { color: var(--ink-soft); font-size: var(--step-0); }

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: var(--space-md);
}
.card {
  padding: var(--space-md);
  background: var(--surface-alt);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  transition: transform var(--dur) var(--ease-out),
              border-color var(--dur) var(--ease-out),
              box-shadow var(--dur) var(--ease-out);
}
.card:hover {
  transform: translateY(-3px);
  border-color: var(--line-strong);
  box-shadow: var(--shadow-md);
}
.card__title {
  font-family: var(--font-body);
  font-size: var(--step-0);
  font-weight: var(--weight-bold);
  margin-bottom: var(--space-2xs);
}
.card__body { color: var(--ink-soft); font-size: var(--step--1); }

/* Hero supporting content */
.hero__intro { max-width: 46rem; }
.hero__langs { margin-top: var(--space-xs); }
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-top: var(--space-lg);
}

/* Editorial stand-in for the reference artwork — typographic, no invented imagery */
.hero__figure { margin: 0; }
.hero__frame {
  display: flex;
  align-items: flex-end;
  min-height: clamp(20rem, 42vw, 32rem);
  padding: clamp(1.75rem, 4vw, 3rem);
  border-radius: var(--radius-md);
  background:
    radial-gradient(120% 90% at 78% 12%, rgba(255, 255, 255, 0.85) 0%, rgba(255, 255, 255, 0) 55%),
    linear-gradient(160deg, var(--surface) 0%, var(--paper-deep) 100%);
  border: 1px solid var(--line);
}
.hero__quote {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--step-3);
  line-height: var(--leading-snug);
  letter-spacing: var(--tracking-tight);
  color: var(--ink);
  max-width: 22ch;
}
.hero__quote span {
  display: block;
  color: var(--ink-soft);
  font-size: var(--step-1);
  margin-top: var(--space-sm);
  letter-spacing: normal;
}

/* Purpose section — short rule-led heading, then the language cards */
.purpose__rule {
  width: clamp(2rem, 4vw, 3.5rem);
  border-top: 2px solid var(--ink);
  margin-bottom: var(--space-md);
}
.lang-card[dir="rtl"] { text-align: right; }
.lang-card .card__title { margin-bottom: var(--space-2xs); }

@media (max-width: 900px) {
  .hero__frame { min-height: 16rem; }
}

/* --------------------------------------------------------------------------
   7. MOTION — reusable animation / transition utilities
   -------------------------------------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity var(--dur-reveal) var(--ease-out),
              transform var(--dur-reveal) var(--ease-out);
  will-change: opacity, transform;
}
.reveal.is-visible { opacity: 1; transform: none; }

.fade-up {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity var(--dur-slow) var(--ease-out),
              transform var(--dur-slow) var(--ease-out);
}
.fade-up.is-visible { opacity: 1; transform: none; }

.fade-in {
  opacity: 0;
  transition: opacity var(--dur-slow) var(--ease-out);
}
.fade-in.is-visible { opacity: 1; }

.stagger > * { transition-delay: calc(var(--stagger-step, 70ms) * var(--i, 0)); }

.marquee { overflow: hidden; }
.marquee__track {
  display: inline-flex;
  gap: var(--space-xl);
  white-space: nowrap;
  animation: marquee-scroll 32s linear infinite;
}
@keyframes marquee-scroll {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

.hover-lift { transition: transform var(--dur) var(--ease-out); }
.hover-lift:hover { transform: translateY(-3px); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .reveal, .fade-up, .fade-in { opacity: 1; transform: none; }
}

/* --------------------------------------------------------------------------
   8. UTILITIES
   -------------------------------------------------------------------------- */
.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;
}
.text-soft { color: var(--ink-soft); }
.text-mute { color: var(--ink-mute); }
.flow-space > * + * { margin-top: var(--space-md); }