/* ============================================================
   Basira Core — brand tokens & site styles
   Source of truth: design handoff README (brand identity zip)
   ============================================================ */

/* Fonts are self-hosted (assets/fonts/ + css/fonts.css), per the handoff's
   production recommendation. Families: Amiri, Readex Pro, IBM Plex Mono. */

:root {
  /* Color */
  --navy: #1B2A44;          /* Steel Navy — primary */
  --brass: #B8925A;         /* Antique Brass — accent, use sparingly */
  --brass-dark: #A9854F;    /* brass darkened ~6% for hover */
  --steel-blue: #4E7BA6;    /* secondary */
  --bone: #F1EFE8;          /* primary light ground */
  --paper: #F8F6EF;         /* cards / raised surfaces */
  --hairline: #E3DFD2;      /* borders on light */
  --slate: #33436B;         /* navy tint */
  --sand: #C9BFA6;          /* muted lines, dashed guides */
  --taupe: #877E67;         /* mono labels on light */
  --muted: #556072;         /* secondary body on light */
  --ondark-body: #AEBBD0;   /* body text on navy */
  --ondark-dim: #8794AC;    /* mono labels on navy */
  --dark-hairline: #33405C; /* borders on navy */

  /* Type */
  --serif: 'Amiri', serif;
  --sans: 'Readex Pro', system-ui, sans-serif;
  --mono: 'IBM Plex Mono', monospace;

  /* Layout */
  --content-max: 1160px;
  --pad-x: 64px;
  --pad-section: 112px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

html, body { margin: 0; padding: 0; }

body {
  background: var(--bone);
  color: var(--navy);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { background: var(--brass); color: var(--bone); }

a { color: var(--navy); text-decoration: none; transition: color 150ms ease; }
a:hover { color: var(--brass); }

img, svg { max-width: 100%; }

h1, h2, h3, p, blockquote, ul { margin: 0; }

/* ---------- shared primitives ---------- */

.container {
  max-width: var(--content-max);
  margin: 0 auto;
  padding-left: var(--pad-x);
  padding-right: var(--pad-x);
}

section { padding-top: var(--pad-section); padding-bottom: var(--pad-section); }

.ground-navy  { background: var(--navy); color: var(--bone); }
.ground-paper { background: var(--paper); border-top: 1px solid var(--hairline); border-bottom: 1px solid var(--hairline); }

/* eyebrow: brass dot + mono label */
.eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 30px;
}
.eyebrow .dot { width: 8px; height: 8px; background: var(--brass); border-radius: 50%; flex: none; }
.eyebrow .label {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--taupe);
}
.ground-navy .eyebrow .label { color: var(--ondark-dim); }

h2 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 44px;
  line-height: 1.1;
  letter-spacing: -0.01em;
}

.lead { color: var(--muted); max-width: 640px; }
.ground-navy .lead { color: var(--ondark-body); }

.mono-label {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--taupe);
}
.ground-navy .mono-label { color: var(--ondark-dim); }

/* buttons */
.btn {
  display: inline-block;
  font-family: var(--sans);
  font-size: 13px;
  padding: 11px 20px;
  line-height: 1.5;
  transition: background 200ms ease-out, color 200ms ease-out, border-color 200ms ease-out;
}
.btn-primary {
  background: var(--brass);
  color: var(--navy);
  font-weight: 600;
}
.btn-primary:hover { background: var(--brass-dark); color: var(--navy); }
.btn-outline-dark {
  border: 1px solid var(--dark-hairline);
  color: var(--bone);
}
.btn-outline-dark:hover { border-color: var(--brass); color: var(--brass); }

/* wordmark (Amiri: "Basira" 700 / "Core" 400 brass) */
.wordmark { font-family: var(--serif); font-weight: 700; letter-spacing: -0.02em; line-height: 1; }
.wordmark .core { font-weight: 400; color: var(--brass); }

/* ---------- header / nav ---------- */

.site-header { background: var(--navy); color: var(--bone); }

.nav-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 26px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--bone);
}
.nav-brand:hover { color: var(--bone); }
.nav-brand .mark { width: 30px; height: 30px; flex: none; }
.nav-brand .wordmark { font-size: 18px; }

.nav-links {
  margin-left: auto;
  display: flex;
  gap: 22px;
  font-size: 13px;
}
.nav-links a { color: var(--ondark-body); }
.nav-links a:hover { color: var(--brass); }

.nav-toggle {
  display: none;
  margin-left: auto;
  background: none;
  border: 1px solid var(--dark-hairline);
  color: var(--bone);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 9px 14px;
  cursor: pointer;
  transition: border-color 150ms ease, color 150ms ease;
}
.nav-toggle:hover { border-color: var(--brass); color: var(--brass); }

/* ---------- hero ---------- */

.hero { padding-top: 44px; padding-bottom: 104px; }

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 28px;
  align-items: center;
}

.hero h1 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 56px;
  line-height: 1.08;
  letter-spacing: -0.01em;
  margin-bottom: 16px;
}

.hero-sub {
  font-size: 16px;
  line-height: 1.6;
  color: var(--ondark-body);
  max-width: 420px;
  margin-bottom: 26px;
}

.hero-ctas { display: flex; gap: 12px; flex-wrap: wrap; }

/* image slot — striped placeholder until real photography is supplied */
.hero-media {
  aspect-ratio: 4 / 3;
  background-image: repeating-linear-gradient(45deg, #202F4E 0px, #202F4E 10px, #243356 10px, #243356 20px);
  border: 1px solid var(--dark-hairline);
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-media span {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ondark-dim);
}

/* ---------- essence ---------- */

.essence-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 72px;
  align-items: start;
}

.essence-arabic {
  font-family: var(--serif);
  font-size: 88px;
  line-height: 1;
  margin-bottom: 8px;
}

.essence-def { margin-bottom: 32px; display: block; }

.essence h2 { font-size: 40px; line-height: 1.18; margin-bottom: 24px; max-width: 520px; }

.essence .lead { max-width: 520px; }

.commitments {
  background: var(--paper);
  border: 1px solid var(--hairline);
  padding: 44px 40px;
}
.commitments > .mono-label { display: block; margin-bottom: 28px; }
.commitment {
  display: flex;
  gap: 16px;
  align-items: baseline;
  padding: 22px 0;
  border-top: 1px solid var(--hairline);
}
.commitment:last-child { border-bottom: 1px solid var(--hairline); }
.commitment .num { font-family: var(--mono); font-size: 13px; color: var(--brass); flex: none; }
.commitment .title { font-size: 19px; font-weight: 600; margin-bottom: 5px; }
.commitment .desc { font-size: 15px; line-height: 1.6; color: var(--muted); }

/* ---------- services (advisory & standards) ---------- */

.services h2 { margin-bottom: 16px; }
.services .lead { margin-bottom: 56px; }

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.card {
  background: var(--bone);
  border: 1px solid var(--hairline);
  padding: 44px 36px;
}
.card .mono-label { display: block; margin-bottom: 24px; }
.card h3 { font-family: var(--sans); font-size: 21px; font-weight: 600; letter-spacing: -0.01em; margin-bottom: 12px; }
.card p { font-size: 15px; line-height: 1.65; color: var(--muted); }

/* ---------- obligium (brand architecture) ---------- */

.obligium h2 { margin-bottom: 16px; }
.obligium .lead { margin-bottom: 64px; }

.arch-grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 44px;
  align-items: center;
}

.arch-panel { border: 1px solid var(--dark-hairline); padding: 48px 44px; }
.arch-panel > .mono-label { display: block; margin-bottom: 28px; }

.arch-parent { display: flex; align-items: center; gap: 20px; }
.arch-parent .mark { width: 56px; height: 56px; flex: none; }
.arch-parent .wordmark { font-size: 32px; }

.arch-endorses {
  font-family: var(--mono);
  font-size: 22px;
  color: var(--brass);
  text-align: center;
}

.obligium-wordmark { font-size: 34px; font-weight: 600; letter-spacing: -0.02em; line-height: 1; }
.brass-rule { width: 36px; height: 2px; background: var(--brass); margin: 16px 0; }
.endorsement-line {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ondark-body);
}

.obligium-cta { margin-top: 56px; }

/* ---------- voice band ---------- */

.voice blockquote {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 34px;
  line-height: 1.35;
  letter-spacing: -0.01em;
  max-width: 820px;
}
.voice .attribution { margin-top: 28px; display: block; }

/* ---------- contact ---------- */

.contact { text-align: center; }
.contact h2 { margin-bottom: 20px; }
.contact .lead { margin: 0 auto 36px; max-width: 520px; }
.contact-details {
  margin-top: 36px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--taupe);
  display: flex;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
}

/* ---------- footer ---------- */

.site-footer { padding: 72px 0; }

.footer-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 24px;
}

.footer-brand { display: flex; align-items: center; gap: 16px; color: var(--bone); }
.footer-brand:hover { color: var(--bone); }
.footer-brand .mark { width: 40px; height: 40px; flex: none; }
.footer-brand .wordmark { font-size: 22px; letter-spacing: -0.01em; }

.footer-links { display: flex; gap: 22px; font-size: 13px; }
.footer-links a { color: var(--ondark-body); }
.footer-links a:hover { color: var(--brass); }

.footer-meta {
  margin-top: 44px;
  padding-top: 24px;
  border-top: 1px solid var(--dark-hairline);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ondark-dim);
}

/* ---------- responsive ---------- */

@media (max-width: 900px) {
  :root { --pad-x: 24px; --pad-section: 64px; }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 10;
    flex-direction: column;
    gap: 0;
    background: var(--navy);
    border-top: 1px solid var(--dark-hairline);
    border-bottom: 1px solid var(--dark-hairline);
    padding: 8px 24px 16px;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 0; border-bottom: 1px solid var(--dark-hairline); }
  .nav-links a:last-child { border-bottom: none; }

  .nav-row { position: relative; }
  .nav-toggle { display: block; }

  .hero { padding-bottom: 64px; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 40px; }

  h2 { font-size: 34px; }

  .essence-grid { grid-template-columns: 1fr; gap: 48px; }
  .essence-arabic { font-size: 64px; }
  .essence h2 { font-size: 32px; }

  .card-grid { grid-template-columns: 1fr; }

  .arch-grid { grid-template-columns: 1fr; gap: 20px; }
  .arch-endorses { text-align: left; }

  .voice blockquote { font-size: 26px; }
}