/* ============================================================
   KFOO AI — Design tokens (source: design-system v0.1)
   Authority: KFOO_Brand_Guidelines.pdf v1.0
   ============================================================ */
:root {
  /* Color */
  --c-navy:           #0F1F3D;
  --c-navy-light:     #1A3260;
  --c-navy-deep:      #0A1428;
  --c-beige:          #E3D9C6;
  --c-beige-light:    #F0EAE0;
  --c-beige-soft:     #F7F3EC;
  --c-white:          #FFFFFF;
  --c-sage:           #8AA15C;
  --c-sage-faint:     rgba(138,161,92,0.12);
  --c-amber:          #B17A2A;
  --c-amber-faint:    rgba(177,122,42,0.10);

  --c-ink:            #0F1F3D;
  --c-ink-soft:       rgba(15,31,61,0.74);
  --c-ink-mute:       rgba(15,31,61,0.55);
  --c-ink-faint:      rgba(15,31,61,0.30);
  --c-ink-hair:       rgba(15,31,61,0.12);
  --c-on-navy:        #F0EAE0;
  --c-on-navy-soft:   rgba(240,234,224,0.78);
  --c-on-navy-mute:   rgba(240,234,224,0.50);

  /* Typography */
  --font-ar: "Almarai", "Tajawal", "Segoe UI Arabic", system-ui, sans-serif;
  --font-en: "Helvetica Neue", "Söhne", Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --t-display-xl: clamp(3rem, 8.5vw, 6.5rem);
  --t-display:    clamp(2.25rem, 5.5vw, 4.5rem);
  --t-h1:         clamp(1.75rem, 3.5vw, 2.75rem);
  --t-h2:         clamp(1.375rem, 2.5vw, 1.875rem);
  --t-h3:         1.25rem;
  --t-lead:       1.1875rem;
  --t-body:       1.0625rem;
  --t-small:      0.9375rem;
  --t-micro:      0.8125rem;
  --t-tag:        0.75rem;

  --lh-tight:  1.1;
  --lh-snug:   1.25;
  --lh-base:   1.75;
  --lh-prose:  1.95;

  --tr-tight:  -0.01em;
  --tr-normal: 0;
  --tr-wide:   0.08em;
  --tr-extra:  0.18em;

  /* Spacing */
  --s-1:0.25rem; --s-2:0.5rem; --s-3:0.75rem; --s-4:1rem; --s-5:1.5rem;
  --s-6:2rem; --s-7:3rem; --s-8:4rem; --s-9:6rem; --s-10:8rem;

  /* Radii */
  --r-xs:6px; --r-sm:10px; --r-md:16px; --r-lg:24px; --r-xl:32px; --r-pill:999px;

  /* Elevation */
  --e-1: 0 1px 2px rgba(15,31,61,0.04), 0 1px 1px rgba(15,31,61,0.02);
  --e-2: 0 4px 14px rgba(15,31,61,0.06);
  --e-3: 0 14px 36px rgba(15,31,61,0.10);
  --e-4: 0 28px 72px rgba(15,31,61,0.14);

  /* Motion */
  --d-fast: 150ms; --d-base: 250ms; --d-slow: 450ms; --d-deliberate: 700ms;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --ease-soft: cubic-bezier(0.32, 0.72, 0, 1);

  /* Layout */
  --container: 1240px;
  --container-prose: 760px;
  --gutter: clamp(1rem, 4vw, 2rem);
}

/* Base reset */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0; font-family: var(--font-ar); font-size: var(--t-body);
  line-height: var(--lh-base); color: var(--c-ink);
  background: var(--c-beige-light);
  -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale;
  font-feature-settings: "kern", "calt", "liga";
}
:focus-visible { outline: 2px solid var(--c-navy); outline-offset: 3px; border-radius: var(--r-xs); }
img, svg { display: block; max-width: 100%; }
.wrap { max-width: var(--container); margin: 0 auto; padding: 0 var(--gutter); }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Shared primitives */
.eyebrow {
  font-family: var(--font-en); font-size: var(--t-micro);
  letter-spacing: var(--tr-extra); text-transform: uppercase; font-weight: 700;
  color: var(--c-ink-soft);
  display: inline-flex; align-items: center; gap: var(--s-3); margin: 0;
}
.eyebrow::before { content: ""; width: 28px; height: 1px; background: var(--c-navy); }
.eyebrow--sage::before { background: var(--c-sage); height: 2px; }
.eyebrow--on-dark { color: var(--c-on-navy-soft); }
.eyebrow--on-dark::before { background: var(--c-sage); }

.btn {
  --btn-bg: var(--c-navy); --btn-fg: var(--c-beige-light); --btn-border: var(--c-navy);
  font-family: var(--font-ar); font-size: var(--t-body); font-weight: 700;
  padding: 0.875rem 1.75rem; border-radius: var(--r-pill);
  background: var(--btn-bg); color: var(--btn-fg);
  border: 1.5px solid var(--btn-border); cursor: pointer;
  display: inline-flex; align-items: center; gap: var(--s-2);
  transition: transform var(--d-base) var(--ease-soft), background var(--d-base) var(--ease-out), box-shadow var(--d-base) var(--ease-out), color var(--d-base) var(--ease-out);
  line-height: 1; text-decoration: none; letter-spacing: var(--tr-normal);
}
.btn:hover { background: var(--c-navy-light); transform: translateY(-1px); box-shadow: var(--e-2); }
.btn--secondary { --btn-bg: transparent; --btn-fg: var(--c-navy); --btn-border: var(--c-navy); }
.btn--secondary:hover { background: var(--c-navy); color: var(--c-beige-light); }
.btn--ghost { --btn-bg: transparent; --btn-fg: var(--c-navy); --btn-border: transparent; padding-inline: var(--s-3); }
.btn--ghost:hover { background: var(--c-ink-hair); box-shadow: none; transform: none; }
.btn--on-dark { --btn-bg: var(--c-beige); --btn-fg: var(--c-navy); --btn-border: var(--c-beige); }
.btn--on-dark:hover { background: var(--c-white); color: var(--c-navy); }
.btn--lg { font-size: var(--t-lead); padding: 1.125rem 2.25rem; }

/* Sticky site nav */
header.site-nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(240, 234, 224, 0.85);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid var(--c-ink-hair);
}
.nav-row { display: flex; align-items: center; justify-content: space-between; padding: var(--s-3) 0; }
.brand { display: inline-flex; align-items: center; gap: var(--s-3); text-decoration: none; color: var(--c-ink); }
.brand .mark { width: 46px; height: 46px; }
.brand .word { font-family: var(--font-en); font-weight: 800; font-size: 1.25rem; letter-spacing: var(--tr-normal); }
.brand .word small { font-weight: 400; color: var(--c-ink-mute); margin-inline-start: var(--s-2); font-size: 0.75rem; letter-spacing: var(--tr-extra); }
.nav-links { display: flex; gap: var(--s-5); font-size: var(--t-small); }
.nav-links a { color: var(--c-ink-soft); text-decoration: none; transition: color var(--d-fast) ease; }
.nav-links a:hover { color: var(--c-navy); }
@media (max-width: 820px) { .nav-links { display: none; } }

/* Footer (shared with index) */
footer.site-foot {
  background: var(--c-navy-deep); color: var(--c-on-navy-mute);
  padding: var(--s-8) 0 var(--s-6); margin-top: var(--s-10);
}
.foot-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr; gap: var(--s-7);
  padding-bottom: var(--s-6); border-bottom: 1px solid rgba(240,234,224,0.08);
}
@media (max-width: 820px) { .foot-grid { grid-template-columns: 1fr; } }
.foot-grid .brand { color: var(--c-beige); }
.foot-tag { color: var(--c-on-navy-soft); margin: var(--s-4) 0 0; font-size: var(--t-small); max-width: 38ch; line-height: var(--lh-base); }
.foot-col h5 {
  font-family: var(--font-en); font-size: var(--t-micro); letter-spacing: var(--tr-extra);
  text-transform: uppercase; margin: 0 0 var(--s-3); color: var(--c-beige); font-weight: 700;
}
.foot-col a {
  color: var(--c-on-navy-mute); text-decoration: none; font-size: var(--t-small);
  display: block; padding: var(--s-1) 0; transition: color var(--d-fast) ease;
}
.foot-col a:hover { color: var(--c-beige); }
.foot-bottom {
  padding-top: var(--s-5); display: flex; justify-content: space-between; flex-wrap: wrap; gap: var(--s-3);
  font-family: var(--font-en); font-size: var(--t-micro); letter-spacing: var(--tr-wide); color: var(--c-on-navy-mute);
}