/* =========================================================
   NileBuild — "Blueprint" Design System
   Identity derived from technical/engineering drawing language:
   dimension lines, ruler ticks, corner brackets, grid paper.
   ========================================================= */

:root {
  --ink:        #0B1F2E;   /* deep blueprint navy */
  --ink-2:      #12314A;   /* lighter navy for panels */
  --blueprint:  #2E6E8E;   /* blueprint line blue */
  --blueprint-l:#5C93AF;   /* lighter blue for lines/hover */
  --paper:      #F1EEE2;   /* warm paper background */
  --paper-2:    #E8E3D2;   /* slightly deeper paper */
  --line:       #C9C2A8;   /* grid/ruler line color on paper */
  --safety:     #E2762A;   /* safety-orange accent / CTA */
  --safety-d:   #C25F1B;
  --ink-soft:   #4A5A66;   /* muted text on paper */
  --paper-soft: #C7D3DA;   /* muted text on ink */
  --white:      #FFFFFF;

  --font-ar:     'Cairo', sans-serif;
  --font-display:'Barlow Condensed', var(--font-ar), sans-serif;
  --font-mono:   'JetBrains Mono', monospace;

  --radius: 4px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-ar);
  background: var(--paper);
  color: var(--ink);
  overflow-x: hidden;
}

h1, h2, h3, h4, h5 {
  font-family: var(--font-ar);
  font-weight: 800;
  letter-spacing: -0.01em;
}

a { text-decoration: none; }

/* ---------- Loader ---------- */
#loader {
  position: fixed; inset: 0; z-index: 9999;
  background: var(--ink);
  display: flex; align-items: center; justify-content: center;
  transition: opacity .4s ease, visibility .4s ease;
}
#loader.loaded { opacity: 0; visibility: hidden; }

/* ---------- Utility: Eyebrow label ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--safety);
}
.eyebrow::before {
  content: "";
  width: 18px; height: 2px;
  background: var(--safety);
  display: inline-block;
}

/* ---------- Navbar ---------- */
.navbar {
  background: rgba(11, 31, 46, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(92, 147, 175, 0.25);
  padding: .9rem 0;
  transition: padding .3s ease, background .3s ease;
}
.navbar.scrolled { padding: .5rem 0; background: rgba(11, 31, 46, 0.98); }
.navbar-brand img { filter: drop-shadow(0 0 0 transparent); }

.navbar-nav .nav-link {
  font-family: var(--font-display);
  font-size: 1.02rem;
  letter-spacing: .03em;
  color: var(--paper-soft) !important;
  position: relative;
  margin: 0 .35rem;
  padding: .4rem .2rem !important;
}
.navbar-nav .nav-link::after {
  content: "";
  position: absolute;
  bottom: 0; right: 0;
  width: 0; height: 2px;
  background: var(--safety);
  transition: width .25s ease;
}
.navbar-nav .nav-link:hover::after,
.navbar-nav .nav-link.active::after { width: 100%; }
.navbar-nav .nav-link.active,
.navbar-nav .nav-link:hover { color: var(--white) !important; }

.btn-quote {
  font-family: var(--font-display);
  letter-spacing: .04em;
  background: var(--safety);
  border: 1px solid var(--safety);
  color: var(--white);
  padding: .55rem 1.4rem;
  border-radius: var(--radius);
  transition: background .2s ease, transform .2s ease;
}
.btn-quote:hover { background: var(--safety-d); color: var(--white); transform: translateY(-1px); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  background: var(--ink);
  overflow: hidden;
  display: flex;
  align-items: center;
}
.hero-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(92,147,175,.14) 1px, transparent 1px),
    linear-gradient(90deg, rgba(92,147,175,.14) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse at 70% 40%, black 10%, transparent 72%);
  -webkit-mask-image: radial-gradient(ellipse at 70% 40%, black 10%, transparent 72%);
}
.hero-glow {
  position: absolute;
  top: -10%; left: 55%;
  width: 60vw; height: 60vw;
  background: radial-gradient(circle, rgba(46,110,142,.35), transparent 60%);
  pointer-events: none;
}
.hero .container { position: relative; z-index: 2; padding-top: 90px; }

.hero .eyebrow { color: var(--safety); margin-bottom: 1rem; }

.hero h1 {
  color: var(--white);
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  line-height: 1.25;
}
.hero h1 .accent { color: var(--safety); }

.hero p.lead {
  color: var(--paper-soft);
  font-size: 1.1rem;
  max-width: 640px;
}

.hero-tags { display: flex; flex-wrap: wrap; gap: .6rem; margin-top: 2rem; }
.hero-tag {
  display: flex; align-items: center; gap: .55rem;
  border: 1px solid rgba(92,147,175,.35);
  background: rgba(46,110,142,.08);
  color: var(--paper-soft);
  padding: .55rem .9rem;
  border-radius: var(--radius);
  font-size: .92rem;
}
.hero-tag i { color: var(--blueprint-l); }

.hero-actions { display: flex; gap: 1rem; margin-top: 2.4rem; flex-wrap: wrap; }
.btn-primary-cta {
  font-family: var(--font-display);
  letter-spacing: .03em;
  font-size: 1.1rem;
  background: var(--safety);
  border: 1px solid var(--safety);
  color: var(--white);
  padding: .75rem 1.8rem;
  border-radius: var(--radius);
  transition: all .2s ease;
}
.btn-primary-cta:hover { background: transparent; color: var(--safety); }
.btn-ghost-cta {
  font-family: var(--font-display);
  letter-spacing: .03em;
  font-size: 1.1rem;
  background: transparent;
  border: 1px solid rgba(92,147,175,.45);
  color: var(--white);
  padding: .75rem 1.8rem;
  border-radius: var(--radius);
  display: inline-flex; align-items: center; gap: .6rem;
  transition: all .2s ease;
}
.btn-ghost-cta:hover { border-color: #25D366; color: #25D366; }

/* Hero visual: blueprint building diagram (CSS/SVG based, no external image needed) */
.hero-diagram { position: relative; z-index: 2; }
.hero-diagram svg { width: 100%; height: auto; }

/* ---------- Ruler divider (section separator, signature element) ---------- */
.ruler {
  height: 26px;
  background-image: repeating-linear-gradient(
    90deg,
    var(--blueprint) 0, var(--blueprint) 1px,
    transparent 1px, transparent 24px
  );
  background-position: center;
  position: relative;
  opacity: .5;
}
.ruler::before {
  content: "";
  position: absolute; left: 0; right: 0; top: 50%;
  height: 1px; background: var(--blueprint);
}
.ruler.on-ink { opacity: .3; }

/* ---------- Dimension stat blocks (signature element) ---------- */
.dim-stats { padding: 3.2rem 0 2.6rem; }
.dim-stat { text-align: center; padding: 0 .5rem; }
.dim-stat .dim-line {
  display: flex; align-items: center; justify-content: center;
  gap: 6px; margin-bottom: .6rem;
}
.dim-stat .dim-line::before,
.dim-stat .dim-line::after {
  content: "";
  flex: 1; max-width: 42px;
  height: 1px; background: var(--blueprint-l);
  position: relative;
}
.dim-stat .dim-line::before { margin-right: 4px; }
.dim-stat .dim-line::after { margin-left: 4px; }
.dim-stat .tick { width: 1px; height: 10px; background: var(--blueprint-l); }
.dim-stat .counter {
  font-family: var(--font-mono);
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--white);
  line-height: 1;
}
.dim-stat .counter::after { content: "+"; color: var(--safety); }
.dim-stat .dim-label {
  font-family: var(--font-ar);
  font-size: .95rem;
  color: var(--paper-soft);
  margin-top: .3rem;
}
section.dim-stats-wrap { background: var(--ink); }

/* Light variant used within light sections */
.dim-stat.on-paper .counter { color: var(--ink); }
.dim-stat.on-paper .dim-label { color: var(--ink-soft); }
.dim-stat.on-paper .dim-line::before,
.dim-stat.on-paper .dim-line::after,
.dim-stat.on-paper .tick { background: var(--blueprint); }

/* ---------- Section generic ---------- */
.section { padding: 5.5rem 0; }
.section-title { font-size: clamp(1.8rem, 3.4vw, 2.6rem); margin-top: .4rem; margin-bottom: 1rem; }
.section-lede { color: var(--ink-soft); max-width: 620px; }
.section-head { margin-bottom: 3rem; }
.section-head.text-center .section-lede { margin-inline: auto; }

.bg-ink { background: var(--ink); color: var(--white); }
.bg-ink .section-lede { color: var(--paper-soft); }
.bg-paper-2 { background: var(--paper-2); }

/* ---------- Corner-bracket cards (signature element) ---------- */
.brk-card {
  position: relative;
  background: var(--white);
  padding: 2.1rem 1.6rem 1.8rem;
  height: 100%;
  border: 1px solid var(--paper-2);
  transition: transform .25s ease, border-color .25s ease;
}
.brk-card::before, .brk-card::after {
  content: "";
  position: absolute;
  width: 16px; height: 16px;
  border: 2px solid var(--blueprint);
  opacity: 0;
  transition: opacity .25s ease, transform .25s ease;
}
.brk-card::before { top: -1px; right: -1px; border-left: none; border-bottom: none; }
.brk-card::after  { bottom: -1px; left: -1px; border-right: none; border-top: none; }
.brk-card:hover { transform: translateY(-5px); }
.brk-card:hover::before, .brk-card:hover::after { opacity: 1; }
.brk-card:hover::before { top: -8px; right: -8px; }
.brk-card:hover::after  { bottom: -8px; left: -8px; }

.brk-card .icon {
  width: 52px; height: 52px;
  display: flex; align-items: center; justify-content: center;
  background: var(--paper-2);
  color: var(--blueprint);
  border-radius: var(--radius);
  font-size: 1.35rem;
  margin-bottom: 1.1rem;
}
.brk-card h4 { font-size: 1.15rem; margin-bottom: .5rem; }
.brk-card p { color: var(--ink-soft); font-size: .95rem; margin-bottom: 0; }

/* Feature box (why-us) — quieter twin of brk-card */
.feature-box {
  padding: 1.8rem 1.4rem;
  height: 100%;
  border-inline-start: 3px solid var(--blueprint);
  background: var(--white);
}
.feature-box i { color: var(--safety); font-size: 1.4rem; margin-bottom: .8rem; display: block; }
.feature-box h4 { font-size: 1.05rem; margin-bottom: .5rem; }
.feature-box p { color: var(--ink-soft); font-size: .93rem; margin-bottom: 0; }

/* ---------- About ---------- */
.about-media {
  position: relative;
  aspect-ratio: 4/3;
  background: linear-gradient(135deg, var(--ink), var(--ink-2));
  border-radius: var(--radius);
  overflow: hidden;
}
.about-media img { width: 100%; height: 100%; object-fit: cover; display: block; }
.about-check { display: flex; align-items: center; gap: .55rem; padding: .35rem 0; color: var(--ink); }
.about-check i { color: var(--safety); }

/* ---------- Projects ---------- */
.project-item { position: relative; overflow: hidden; border-radius: var(--radius); aspect-ratio: 4/3; background: var(--paper-2); }
.project-item img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; display: block; }
.project-item:hover img { transform: scale(1.06); }
.project-overlay {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; justify-content: flex-end;
  padding: 1.4rem;
  background: linear-gradient(0deg, rgba(11,31,46,.9) 0%, transparent 55%);
  color: var(--white);
}
.project-overlay h4 { font-size: 1.05rem; margin: 0; }
.project-overlay p { font-family: var(--font-mono); font-size: .8rem; color: var(--paper-soft); margin: 0; }

/* ---------- CTA band ---------- */
.cta-band {
  background: var(--blueprint);
  background-image:
    repeating-linear-gradient(90deg, rgba(255,255,255,.08) 0, rgba(255,255,255,.08) 1px, transparent 1px, transparent 24px);
  padding: 3.2rem 0;
  color: var(--white);
}
.cta-band h2 { color: var(--white); font-size: 1.9rem; }
.cta-band p { color: rgba(255,255,255,.85); margin-bottom: 0; }
.btn-whatsapp {
  background: #1F9E4E;
  color: var(--white);
  font-family: var(--font-display);
  letter-spacing: .03em;
  font-size: 1.05rem;
  padding: .7rem 1.6rem;
  border-radius: var(--radius);
  display: inline-flex; align-items: center; gap: .55rem;
  transition: background .2s ease;
}
.btn-whatsapp:hover { background: #1a8442; color: var(--white); }

/* ---------- Contact ---------- */
.contact-list { list-style: none; padding: 0; margin: 1.6rem 0 0; }
.contact-list li {
  display: flex; align-items: flex-start; gap: .8rem;
  padding: .8rem 0;
  border-bottom: 1px dashed var(--line);
  font-size: .96rem;
}
.contact-list li i { color: var(--safety); margin-top: .2rem; width: 18px; }

.form-control {
  background: var(--white);
  border: 1px solid var(--paper-2);
  border-radius: var(--radius);
  padding: .75rem 1rem;
}
.form-control:focus {
  border-color: var(--blueprint);
  box-shadow: 0 0 0 3px rgba(46,110,142,.15);
}
.btn-submit {
  font-family: var(--font-display);
  letter-spacing: .03em;
  font-size: 1.05rem;
  background: var(--ink);
  color: var(--white);
  padding: .7rem 1.8rem;
  border-radius: var(--radius);
  border: 1px solid var(--ink);
  transition: background .2s ease;
}
.btn-submit:hover { background: var(--safety); border-color: var(--safety); color: var(--white); }

/* ---------- Footer ---------- */
.footer {
  background: var(--ink);
  color: var(--paper-soft);
  padding: 4.5rem 0 1.5rem;
}
.footer h4 {
  font-family: var(--font-display);
  letter-spacing: .04em;
  color: var(--white);
  font-size: 1.05rem;
  margin-bottom: 1.2rem;
}
.footer p { font-size: .92rem; line-height: 1.9; }
.footer ul { list-style: none; padding: 0; margin: 0; }
.footer ul li { margin-bottom: .65rem; }
.footer ul li a { color: var(--paper-soft); font-size: .93rem; transition: color .2s ease; }
.footer ul li a:hover { color: var(--safety); }
.footer .contact-list li { border-bottom-color: rgba(255,255,255,.1); color: var(--paper-soft); }
.footer-logo { height: 46px; }
.social-icons { display: flex; gap: .7rem; }
.social-icons a {
  width: 38px; height: 38px;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid rgba(92,147,175,.4);
  color: var(--paper-soft);
  border-radius: var(--radius);
  transition: all .2s ease;
}
.social-icons a:hover { background: var(--safety); border-color: var(--safety); color: var(--white); }
.copyright {
  font-family: var(--font-mono);
  font-size: .78rem;
  color: var(--paper-soft);
  opacity: .7;
  padding-top: 1.5rem;
  text-align: center;
}

/* ---------- Floating actions ---------- */
.whatsapp-float {
  position: fixed; bottom: 22px; left: 22px; z-index: 999;
  width: 56px; height: 56px;
  background: #25D366;
  color: var(--white);
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  font-size: 1.5rem;
  box-shadow: 0 8px 24px rgba(0,0,0,.25);
  transition: transform .2s ease;
}
.whatsapp-float:hover { transform: scale(1.08); color: var(--white); }

#scrollTop {
  position: fixed; bottom: 22px; right: 22px; z-index: 999;
  width: 46px; height: 46px;
  background: var(--ink);
  color: var(--white);
  border: 1px solid var(--blueprint-l);
  border-radius: 50%;
  opacity: 0; visibility: hidden;
  transform: translateY(10px);
  transition: all .25s ease;
}
#scrollTop.show { opacity: 1; visibility: visible; transform: translateY(0); }

/* ---------- Partners logo strip ---------- */
.partner-logo {
    max-width: 100%;
    max-height: 70px;
    object-fit: contain;
    filter: grayscale(100%);
    opacity: .6;
    transition: filter .25s ease, opacity .25s ease, transform .25s ease;
}
.partner-logo:hover {
    filter: grayscale(0%);
    opacity: 1;
    transform: scale(1.05);
}

/* ---------- Responsive ---------- */
@media (max-width: 991px) {
  .navbar-collapse { background: var(--ink); margin-top: 1rem; padding: 1rem; border-radius: var(--radius); }
  .hero { text-align: center; }
  .hero-tags, .hero-actions { justify-content: center; }
  .dim-stat { margin-bottom: 1.6rem; }
  .section { padding: 3.5rem 0; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}