/* ============================================================
   SIYAQ — Engineering Consultancy
   ECCE-inspired layout · SIYAQ brand palette (light corporate)
   ============================================================ */

/* ---- Design tokens ---- */
:root {
  /* palette */
  --ink:        #222423;   /* Graphite — headings, footer, primary text */
  --ink-soft:   #3a3c3b;
  --paper:      #fbf9f2;   /* Ivory — page background */
  --paper-2:    #f2efe6;   /* slightly deeper section background */
  --white:      #ffffff;
  --accent:     #5f9e93;   /* deepened Sage-teal — primary accent */
  --accent-dk:  #4c847a;
  --accent-lt:  #97bfb8;   /* original Structural Sage — light accent */
  --wine:       #41121c;   /* Foundation Burgundy — secondary emphasis */
  --wine-lt:    #6d2233;
  --body:       #63635c;   /* warm grey body text */
  --muted:      #8c8c83;
  --line:       rgba(34,36,35,0.12);
  --line-2:     rgba(34,36,35,0.06);

  /* type */
  --display: 'Space Grotesk', 'Noto Kufi Arabic', system-ui, sans-serif;
  --body-face: 'Inter', 'Noto Kufi Arabic', system-ui, sans-serif;

  /* rhythm */
  --container: 1240px;
  --gutter: clamp(1.2rem, 4vw, 3rem);
  --section-y: clamp(4.5rem, 9vw, 8.5rem);
  --radius: 3px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--body-face);
  background: var(--paper);
  color: var(--body);
  line-height: 1.7;
  font-size: 16px;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
::selection { background: var(--accent); color: #fff; }

/* ---- Layout helpers ---- */
.container { max-width: var(--container); margin-inline: auto; padding-inline: var(--gutter); }
.section { padding-block: var(--section-y); }
.section--paper2 { background: var(--paper-2); }
.section--ink { background: var(--ink); color: #d8d8d2; }
.section--wine { background: var(--wine); color: #efe4e6; }

/* ---- Type ---- */
h1,h2,h3,h4 { font-family: var(--display); color: var(--ink); font-weight: 600; line-height: 1.08; letter-spacing: -0.02em; }
.section--ink h1,.section--ink h2,.section--ink h3,.section--ink h4,
.section--wine h1,.section--wine h2,.section--wine h3,.section--wine h4 { color: #fff; }

.eyebrow {
  font-family: var(--display);
  font-size: .82rem; font-weight: 600; letter-spacing: .18em; text-transform: uppercase;
  color: var(--accent-dk); display: inline-flex; align-items: center; gap: .7rem; margin-bottom: 1.3rem;
}
.eyebrow::before { content:''; width: 30px; height: 2px; background: var(--accent); display:inline-block; }
.section--ink .eyebrow, .section--wine .eyebrow { color: var(--accent-lt); }
.section--ink .eyebrow::before, .section--wine .eyebrow::before { background: var(--accent-lt); }

.h-xl { font-size: clamp(2.4rem, 5.2vw, 4.4rem); }
.h-lg { font-size: clamp(2rem, 4vw, 3.2rem); }
.h-md { font-size: clamp(1.5rem, 2.6vw, 2.1rem); }
.lede { font-size: clamp(1.05rem, 1.5vw, 1.22rem); color: var(--body); line-height: 1.85; }
.section--ink .lede, .section--wine .lede { color: rgba(255,255,255,.8); }
.muted { color: var(--muted); }

/* accent rule under headings */
.title-rule { width: 64px; height: 3px; background: var(--accent); margin-top: 1.4rem; border: 0; }

/* ---- Buttons ---- */
.btn {
  display: inline-flex; align-items: center; gap: .7rem;
  font-family: var(--display); font-weight: 600; font-size: .9rem; letter-spacing: .02em;
  padding: 1rem 1.9rem; border-radius: var(--radius); cursor: pointer;
  transition: transform .25s ease, background .25s ease, color .25s ease, border-color .25s;
  border: 1.5px solid transparent; text-align: center;
}
.btn svg { width: 15px; height: 15px; }
.btn--accent { background: var(--accent); color: #fff; }
.btn--accent:hover { background: var(--accent-dk); transform: translateY(-2px); }
.btn--dark { background: var(--ink); color: #fff; }
.btn--dark:hover { background: var(--wine); transform: translateY(-2px); }
.btn--ghost { border-color: currentColor; color: var(--ink); }
.btn--ghost:hover { background: var(--ink); color: #fff; border-color: var(--ink); }
.section--ink .btn--ghost, .section--wine .btn--ghost { color:#fff; }
.section--ink .btn--ghost:hover { background:#fff; color: var(--ink); border-color:#fff; }
.btn--light { background:#fff; color: var(--ink); }
.btn--light:hover { background: var(--accent); color:#fff; transform: translateY(-2px); }

/* ============================================================
   HEADER
   ============================================================ */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 1000;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 var(--gutter); height: 92px;
  transition: background .35s ease, height .35s ease, box-shadow .35s;
}
.site-header.solid { background: var(--ink); height: 74px; box-shadow: 0 6px 30px rgba(0,0,0,.18); }
.brand { display: flex; align-items: center; gap: .8rem; z-index: 1002; }
.brand img { height: 60px; width: auto; transition: height .35s; }
.site-header.solid .brand img { height: 46px; }

.nav { display: flex; align-items: center; gap: 2.1rem; }
.nav a {
  font-family: var(--display); font-weight: 500; font-size: .94rem; color: #fff;
  letter-spacing: .01em; position: relative; padding: .3rem 0; opacity: .92;
}
.nav a::after {
  content:''; position:absolute; left:0; bottom:-3px; height:2px; width:0; background: var(--accent-lt); transition: width .3s ease;
}
.nav a:hover, .nav a.active { opacity: 1; }
.nav a:hover::after, .nav a.active::after { width: 100%; }
.nav .btn { padding: .7rem 1.4rem; margin-inline-start: .4rem; }

.nav-toggle { display:none; background:none; border:0; cursor:pointer; z-index:1002; width:34px; height:26px; position:relative; }
.nav-toggle span { position:absolute; left:0; height:2.4px; width:100%; background:#fff; border-radius:2px; transition: transform .3s, opacity .3s, top .3s; }
.nav-toggle span:nth-child(1){ top:2px; }
.nav-toggle span:nth-child(2){ top:11px; }
.nav-toggle span:nth-child(3){ top:20px; }
.nav-toggle.open span:nth-child(1){ top:11px; transform: rotate(45deg); }
.nav-toggle.open span:nth-child(2){ opacity:0; }
.nav-toggle.open span:nth-child(3){ top:11px; transform: rotate(-45deg); }

/* ============================================================
   HERO (home)
   ============================================================ */
.hero { position: relative; min-height: 100vh; display: flex; align-items: flex-end; color:#fff; overflow: hidden; }
.hero__slides { position:absolute; inset:0; z-index:0; }
.hero__slide {
  position:absolute; inset:0; background-size:cover; background-position:center;
  opacity:0; transform: scale(1.08); transition: opacity 1.4s ease, transform 7s ease;
}
.hero__slide.active { opacity:1; transform: scale(1); }
.hero__scrim { position:absolute; inset:0; z-index:1;
  background: linear-gradient(180deg, rgba(20,21,20,.55) 0%, rgba(20,21,20,.35) 35%, rgba(20,21,20,.82) 100%); }
.hero__inner { position: relative; z-index:2; width:100%; padding-bottom: clamp(3rem,7vh,6rem); padding-top: 120px; }
.hero__tagline { display:flex; gap:1.4rem; flex-wrap:wrap; font-family:var(--display); font-weight:500; letter-spacing:.02em; margin-bottom:1.6rem; color: var(--accent-lt); }
.hero__tagline span { display:flex; align-items:center; gap:1.4rem; font-size: clamp(.85rem,1.3vw,1rem); text-transform:uppercase; }
.hero__tagline span::after { content:''; width:6px; height:6px; background: var(--accent-lt); border-radius:50%; }
.hero__tagline span:last-child::after { display:none; }
.hero h1 { color:#fff; font-size: clamp(2.6rem, 6.5vw, 6rem); max-width: 16ch; }
.hero h1 em { font-style: normal; color: var(--accent-lt); }
.hero__sub { margin-top: 1.6rem; max-width: 52ch; font-size: clamp(1.02rem,1.5vw,1.2rem); color: rgba(255,255,255,.85); }
.hero__cta { margin-top: 2.4rem; display:flex; gap:1rem; flex-wrap:wrap; }

/* hero stat ticker */
.hero__ticker { border-top:1px solid rgba(255,255,255,.16); margin-top: clamp(2.5rem,5vh,4rem); padding-top: 1.8rem; display:flex; flex-wrap:wrap; gap: clamp(1.5rem,5vw,4rem); }
.hero__stat b { font-family:var(--display); font-size: clamp(1.8rem,3.4vw,2.9rem); font-weight:600; color:#fff; display:block; line-height:1; }
.hero__stat span { font-size:.82rem; letter-spacing:.12em; text-transform:uppercase; color: rgba(255,255,255,.7); }

/* slide dots */
.hero__dots { position:absolute; bottom: 1.5rem; right: var(--gutter); z-index:3; display:flex; gap:.6rem; }
.hero__dots button { width: 30px; height:3px; background: rgba(255,255,255,.35); border:0; cursor:pointer; padding:0; transition: background .3s; }
.hero__dots button.active { background: var(--accent-lt); }

/* ============================================================
   Reusable content blocks
   ============================================================ */
/* split intro (image + text) */
.split { display:grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem,5vw,5rem); align-items:center; }
.split--rev .split__media { order: 2; }
.split__media { position:relative; }
.split__media img { width:100%; height:100%; object-fit:cover; border-radius: var(--radius); aspect-ratio: 6/5; }
.split__media .badge {
  position:absolute; bottom: -26px; left: -26px; background: var(--wine); color:#fff; padding: 1.5rem 1.8rem; border-radius: var(--radius); max-width: 60%;
}
.split__media .badge b { font-family:var(--display); font-size:2rem; display:block; line-height:1; }
.split__media .badge span { font-size:.78rem; letter-spacing:.1em; text-transform:uppercase; opacity:.85; }

/* stat row */
.stats { display:grid; grid-template-columns: repeat(4,1fr); gap: 1.5rem; margin-top: 3rem; }
.stat { border-top: 3px solid var(--accent); padding-top: 1.1rem; }
.stat b { font-family:var(--display); font-size: clamp(2rem,4vw,3rem); font-weight:600; color: var(--ink); display:block; line-height:1; }
.section--ink .stat b { color:#fff; }
.stat span { font-size:.82rem; letter-spacing:.08em; text-transform:uppercase; color: var(--muted); }

/* service cards */
.svc-grid { display:grid; grid-template-columns: repeat(3,1fr); gap: 1.4rem; }
.svc-card { position:relative; overflow:hidden; border-radius: var(--radius); aspect-ratio: 4/5; background:#111; display:flex; align-items:flex-end; }
.svc-card img { position:absolute; inset:0; width:100%; height:100%; object-fit:cover; z-index:0; transition: transform .7s ease; filter: grayscale(15%) brightness(.82); }
.svc-card:hover img { transform: scale(1.06); filter: grayscale(0) brightness(.9); }
.svc-card::after { content:''; position:absolute; inset:0; z-index:1; background: linear-gradient(180deg, transparent 40%, rgba(20,21,20,.9)); }
.svc-card__body { position:relative; z-index:2; padding: 1.6rem 1.7rem; color:#fff; width:100%; }
.svc-card__body h3 { color:#fff; font-size:1.28rem; margin-bottom:.35rem; }
.svc-card__body p { font-size:.9rem; color: rgba(255,255,255,.78); opacity:0; max-height:0; transition: opacity .4s, max-height .4s; }
.svc-card:hover .svc-card__body p { opacity:1; max-height:120px; }
.svc-card__tag { position:absolute; top:1.2rem; left:1.2rem; z-index:2; width:34px; height:34px; }

/* process timeline */
.proc { display:grid; grid-template-columns: repeat(5,1fr); gap:1.2rem; margin-top:3rem; }
.proc__step { position:relative; }
.proc__num { font-family:var(--display); font-size:.85rem; font-weight:600; color: var(--accent-dk); width:38px; height:38px; border:1.5px solid var(--accent); border-radius:50%; display:flex; align-items:center; justify-content:center; margin-bottom:1.2rem; }
.section--ink .proc__num { color: var(--accent-lt); border-color: var(--accent-lt); }
.proc__step img { width:100%; aspect-ratio:4/3; object-fit:cover; border-radius:var(--radius); margin-bottom:1rem; filter: grayscale(20%); }
.proc__step h4 { font-size:1.02rem; margin-bottom:.5rem; }
.proc__step p { font-size:.88rem; }
.section--ink .proc__step p { color: rgba(255,255,255,.72); }

/* sector / project grid */
.sector-grid { display:grid; grid-template-columns: repeat(3,1fr); gap:1.4rem; }
.sector-card { position:relative; overflow:hidden; border-radius:var(--radius); aspect-ratio:3/2; display:flex; align-items:flex-end; background:#111; }
.sector-card img { position:absolute; inset:0; width:100%; height:100%; object-fit:cover; z-index:0; transition: transform .7s; filter: brightness(.7) grayscale(20%); }
.sector-card:hover img { transform: scale(1.05); filter: brightness(.82) grayscale(0); }
.sector-card::after { content:''; position:absolute; inset:0; z-index:1; background: linear-gradient(180deg, transparent 45%, rgba(20,21,20,.88)); }
.sector-card__body { position:relative; z-index:2; padding:1.5rem 1.6rem; color:#fff; width:100%; display:flex; align-items:center; justify-content:space-between; }
.sector-card__body h3 { color:#fff; font-size:1.25rem; }
.sector-card__badge { font-size:.68rem; letter-spacing:.1em; text-transform:uppercase; background: rgba(255,255,255,.16); padding:.3rem .6rem; border-radius:2px; }
.sector-card__badge.soon { background: var(--accent); }

/* value cards */
.value-grid { display:grid; grid-template-columns: repeat(3,1fr); gap:1.4rem; }
.value-card { background:#fff; border:1px solid var(--line); border-radius:var(--radius); padding:2.2rem 2rem; transition: border-color .3s, transform .3s; }
.value-card:hover { border-color: var(--accent); transform: translateY(-4px); }
.value-card .vnum { font-family:var(--display); font-size:.8rem; font-weight:600; color: var(--accent-dk); letter-spacing:.1em; }
.value-card h3 { font-size:1.3rem; margin:.6rem 0 .8rem; }
.value-card p { font-size:.95rem; }

/* partners grid */
.partners { display:grid; grid-template-columns: repeat(5,1fr); gap:1px; background: var(--line); border:1px solid var(--line); }
.partner { background:#fff; aspect-ratio:3/2; display:flex; align-items:center; justify-content:center; padding:1.5rem; font-family:var(--display); font-weight:600; color: var(--muted); font-size:.95rem; text-align:center; transition: color .3s, background .3s; }
.partner:hover { color: var(--ink); background: var(--paper); }

/* CTA band */
.cta-band { position:relative; overflow:hidden; text-align:center; }
.cta-band h2 { font-size: clamp(2rem,4.5vw,3.6rem); max-width:18ch; margin-inline:auto; }
.cta-band p { max-width:48ch; margin: 1.4rem auto 2.2rem; }

/* page hero (interior pages) */
.page-hero { position:relative; padding-top: 180px; padding-bottom: clamp(3rem,6vw,5rem); color:#fff; overflow:hidden; }
.page-hero__bg { position:absolute; inset:0; z-index:0; background-size:cover; background-position:center; }
.page-hero__scrim { position:absolute; inset:0; z-index:1; background: linear-gradient(180deg, rgba(20,21,20,.7), rgba(20,21,20,.85)); }
.page-hero .container { position:relative; z-index:2; }
.page-hero h1 { color:#fff; font-size: clamp(2.4rem,5vw,4rem); }
.crumbs { font-size:.85rem; color: rgba(255,255,255,.7); margin-bottom:1rem; font-family:var(--display); letter-spacing:.03em; }
.crumbs a:hover { color: var(--accent-lt); }

/* prose */
.prose p { margin-bottom:1.3rem; }
.prose h3 { margin: 2.4rem 0 1rem; font-size:1.5rem; }
.prose ul { list-style:none; margin-bottom:1.4rem; }
.prose li { position:relative; padding-inline-start:1.6rem; margin-bottom:.7rem; }
.prose li::before { content:''; position:absolute; inset-inline-start:0; top:.65em; width:7px; height:7px; background: var(--accent); border-radius:50%; }

/* two-col text */
.duo { display:grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem,5vw,4.5rem); }

/* contact */
.contact-grid { display:grid; grid-template-columns: 1fr 1.1fr; gap: clamp(2rem,5vw,4rem); }
.contact-info .c-item { display:flex; gap:1rem; padding:1.4rem 0; border-bottom:1px solid var(--line); }
.contact-info .c-item svg { width:22px; height:22px; color: var(--accent-dk); flex-shrink:0; margin-top:3px; }
.contact-info .c-item .lbl { font-size:.75rem; letter-spacing:.1em; text-transform:uppercase; color: var(--muted); margin-bottom:.2rem; }
.contact-info .c-item .val { font-family:var(--display); color: var(--ink); font-size:1.05rem; }
.form { background:#fff; border:1px solid var(--line); border-radius:var(--radius); padding: clamp(1.6rem,3vw,2.6rem); }
.form .row { display:grid; grid-template-columns:1fr 1fr; gap:1rem; }
.field { margin-bottom:1.1rem; }
.field label { display:block; font-size:.78rem; letter-spacing:.06em; text-transform:uppercase; color: var(--muted); margin-bottom:.4rem; font-family:var(--display); }
.field input, .field textarea, .field select {
  width:100%; background: var(--paper); border:1px solid var(--line); border-radius:var(--radius);
  padding:.85rem 1rem; font-family:var(--body-face); font-size:.95rem; color: var(--ink); outline:none; transition: border-color .25s;
}
.field input:focus, .field textarea:focus, .field select:focus { border-color: var(--accent); }
.field textarea { min-height:120px; resize:vertical; }
.form__note { font-size:.85rem; margin-top:.6rem; }

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer { background: var(--ink); color: rgba(255,255,255,.66); position:relative; }
.footer-cta { border-bottom:1px solid rgba(255,255,255,.1); }
.footer-main { padding-block: clamp(3.5rem,6vw,5rem); }
.footer-grid { display:grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 2.5rem; }
.footer-col h5 { color:#fff; font-family:var(--display); font-size:.8rem; letter-spacing:.14em; text-transform:uppercase; margin-bottom:1.3rem; font-weight:600; }
.footer-col a { display:block; padding:.35rem 0; font-size:.95rem; transition: color .25s; }
.footer-col a:hover { color: var(--accent-lt); }
.footer-brand img { height:56px; margin-bottom:1.2rem; }
.footer-brand p { font-size:.92rem; max-width:34ch; }
.footer-bottom { border-top:1px solid rgba(255,255,255,.1); padding-block:1.6rem; display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:1rem; font-size:.85rem; }
.footer-social { display:flex; gap:.7rem; }
.footer-social a { width:38px; height:38px; border:1px solid rgba(255,255,255,.2); border-radius:50%; display:flex; align-items:center; justify-content:center; transition: background .3s, border-color .3s; }
.footer-social a:hover { background: var(--accent); border-color: var(--accent); }
.footer-social svg { width:16px; height:16px; }

/* iso badge */
.iso { display:flex; align-items:center; gap:.8rem; }
.iso .iso-mark { width:52px; height:52px; border:2px solid var(--accent-lt); border-radius:50%; display:flex; align-items:center; justify-content:center; font-family:var(--display); font-weight:600; font-size:.62rem; color: var(--accent-lt); text-align:center; line-height:1; }

/* ---- reveal animation ---- */
.reveal { opacity:0; transform: translateY(24px); transition: opacity .8s ease, transform .8s ease; }
.reveal.in { opacity:1; transform:none; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .svc-grid, .sector-grid, .value-grid { grid-template-columns: repeat(2,1fr); }
  .proc { grid-template-columns: repeat(2,1fr); }
  .partners { grid-template-columns: repeat(3,1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap:2rem; }
  .stats { grid-template-columns: repeat(2,1fr); }
}
@media (max-width: 820px) {
  .nav { position: fixed; inset:0 0 0 auto; width: min(82vw,360px); background: var(--ink); flex-direction:column; align-items:flex-start; justify-content:center; gap:1.6rem; padding: 2rem 2.4rem; transform: translateX(100%); transition: transform .4s ease; z-index:1001; }
  .nav.open { transform: translateX(0); }
  .nav a { font-size:1.2rem; }
  .nav .btn { margin:0; }
  .nav-toggle { display:block; }
  .split, .duo, .contact-grid { grid-template-columns: 1fr; }
  .split--rev .split__media { order:0; }
  .split__media .badge { position:static; max-width:100%; margin-top:1rem; }
  .form .row { grid-template-columns:1fr; }
}
@media (max-width: 560px) {
  .svc-grid, .sector-grid, .value-grid, .proc, .stats, .partners { grid-template-columns: 1fr; }
  .partners { grid-template-columns: repeat(2,1fr); }
  .hero__ticker { gap:1.4rem 2rem; }
  .brand img { height:44px; }
}
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; scroll-behavior:auto; }
  .reveal { opacity:1; transform:none; }
}