/* ============================================================
   MongoBuild — unique design system
   Concept: "Concrete & Eternal Sky" — charcoal + warm sand +
   Mongolian eternal-blue accent. Editorial grid, oversized type.
   Fonts: Syne (display) + Manrope (text)
   Prefix: mb-
   ============================================================ */
@import url('https://fonts.googleapis.com/css2?family=Syne:wght@600;700;800&family=Manrope:wght@400;500;600;700&display=swap');

:root {
  --ink: #16181d;
  --ink-2: #21242c;
  --sand: #ece6db;
  --sand-2: #f5f1e9;
  --bone: #fbfaf7;
  --sky: #2e6db4;
  --sky-deep: #1f4e86;
  --amber: #d98a34;
  --muted: #6d6a63;
  --line: rgba(22, 24, 29, 0.12);
  --line-light: rgba(255, 255, 255, 0.16);
  --r: 22px;
  --r-lg: 34px;
  --shadow: 0 24px 60px rgba(22, 24, 29, 0.14);
}

* , *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "Manrope", sans-serif;
  background: var(--sand);
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4, .mb-brand { font-family: "Syne", sans-serif; line-height: 1.02; letter-spacing: -0.02em; font-weight: 700; }

.mb-wrap { width: min(1200px, calc(100% - 2.6rem)); margin-inline: auto; }
.mb-eyebrow {
  display: inline-flex; align-items: center; gap: .55rem;
  font-family: "Manrope"; font-size: .74rem; font-weight: 700;
  letter-spacing: .16em; text-transform: uppercase; color: var(--sky-deep);
}
.mb-eyebrow::before { content: ""; width: 22px; height: 2px; background: var(--sky); }
.mb-eyebrow--light { color: rgba(255,255,255,.7); }
.mb-eyebrow--light::before { background: var(--amber); }

/* buttons */
.mb-btn {
  display: inline-flex; align-items: center; gap: .55rem;
  padding: .95rem 1.5rem; border-radius: 999px;
  font-weight: 600; font-size: .94rem; cursor: pointer; border: 1px solid transparent;
  transition: transform .2s, background .2s, color .2s, border-color .2s;
}
.mb-btn:hover { transform: translateY(-2px); }
.mb-btn--sky { background: var(--sky); color: #fff; }
.mb-btn--sky:hover { background: var(--sky-deep); }
.mb-btn--ink { background: var(--ink); color: #fff; }
.mb-btn--ink:hover { background: var(--ink-2); }
.mb-btn--ghost { border-color: var(--line); color: var(--ink); }
.mb-btn--ghost:hover { border-color: var(--ink); }
.mb-btn--light { background: rgba(255,255,255,.08); color: #fff; border-color: var(--line-light); }
.mb-btn--light:hover { background: rgba(255,255,255,.16); }
.mb-arw { line-height: 0; font-size: 1.1em; }

/* ---------------- header ---------------- */
.mb-header { position: sticky; top: 0; z-index: 70; padding: .85rem 0; background: rgba(236,230,219,.8); backdrop-filter: blur(12px); border-bottom: 1px solid transparent; transition: border-color .3s; }
.mb-header.mb-scrolled { border-color: var(--line); }
.mb-header__in { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.mb-brand { display: inline-flex; align-items: center; gap: .6rem; font-size: 1.28rem; font-weight: 800; }
.mb-brand__mark { width: 30px; height: 30px; border-radius: 9px; background: var(--ink); position: relative; overflow: hidden; }
.mb-brand__mark::before { content:""; position:absolute; inset:0; background: linear-gradient(135deg, var(--sky) 0 50%, var(--amber) 50% 100%); clip-path: polygon(0 100%, 50% 0, 100% 100%); }
.mb-brand span { color: var(--sky-deep); }
.mb-nav { display: flex; align-items: center; gap: 1.7rem; }
.mb-nav a { font-size: .93rem; font-weight: 500; opacity: .82; position: relative; }
.mb-nav a:hover, .mb-nav a.mb-active { opacity: 1; }
.mb-nav a.mb-active::after { content:""; position:absolute; left:0; right:0; bottom:-6px; height:2px; background: var(--sky); }
.mb-header__cta { display: flex; align-items: center; gap: .6rem; }
.mb-burger { display: none; width: 46px; height: 46px; border-radius: 999px; background: var(--ink); color: #fff; border: 0; font-size: 1.15rem; cursor: pointer; }

/* ---------------- generic section ---------------- */
.mb-sec { padding: 4.5rem 0; }
.mb-sec--tight { padding: 3rem 0; }
.mb-head { max-width: 660px; margin-bottom: 2.6rem; }
.mb-head h2 { font-size: clamp(2rem, 4.4vw, 3.3rem); margin: .8rem 0; }
.mb-head p { color: var(--muted); font-size: 1.06rem; }

/* ---------------- hero ---------------- */
.mb-hero { position: relative; padding: 2rem 0 3rem; }
.mb-hero__grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 1.1rem; align-items: stretch; }
.mb-hero__main {
  background: var(--ink); color: #fff; border-radius: var(--r-lg);
  padding: clamp(1.8rem, 3.5vw, 3.2rem); position: relative; overflow: hidden;
  display: flex; flex-direction: column; justify-content: space-between; min-height: 520px;
}
.mb-hero__main::after { content:""; position:absolute; right:-120px; top:-120px; width:340px; height:340px; border-radius:50%; background: var(--sky); filter: blur(120px); opacity:.35; }
.mb-hero h1 { font-size: clamp(2.4rem, 5vw, 4.1rem); font-weight: 800; margin: 1.2rem 0 1.1rem; position: relative; }
.mb-hero h1 em { font-style: normal; color: var(--amber); }
.mb-hero__lead { color: rgba(255,255,255,.72); max-width: 34rem; font-size: 1.05rem; position: relative; }
.mb-hero__actions { display: flex; flex-wrap: wrap; gap: .7rem; margin-top: 2rem; position: relative; }
.mb-hero__stats { display: flex; gap: 2.2rem; margin-top: 2.4rem; position: relative; }
.mb-hero__stats .n { font-family: "Syne"; font-size: 1.9rem; font-weight: 800; color: var(--amber); }
.mb-hero__stats .l { font-size: .82rem; color: rgba(255,255,255,.6); }
.mb-hero__media { border-radius: var(--r-lg); overflow: hidden; position: relative; min-height: 520px; }
.mb-hero__media img { width: 100%; height: 100%; object-fit: cover; }
.mb-hero__badge { position: absolute; left: 1.2rem; bottom: 1.2rem; right: 1.2rem; background: rgba(251,250,247,.9); backdrop-filter: blur(8px); border-radius: var(--r); padding: 1rem 1.2rem; display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.mb-hero__badge b { font-family: "Syne"; font-size: .98rem; }
.mb-hero__badge span { font-size: .8rem; color: var(--muted); }

/* ---------------- marquee strip ---------------- */
.mb-strip { background: var(--ink); color: #fff; padding: 1.1rem 0; overflow: hidden; }
.mb-strip__row { display: flex; gap: 3rem; align-items: center; white-space: nowrap; font-family: "Syne"; font-weight: 700; font-size: 1.05rem; }
.mb-strip__row span { display: inline-flex; align-items: center; gap: 3rem; }
.mb-strip__row span::after { content: "◆"; color: var(--sky); font-size: .8rem; }

/* ---------------- services grid ---------------- */
.mb-svc { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.mb-card {
  background: var(--bone); border: 1px solid var(--line); border-radius: var(--r);
  overflow: hidden; display: flex; flex-direction: column; transition: transform .25s, box-shadow .25s;
}
.mb-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.mb-card__img { aspect-ratio: 4/3; overflow: hidden; }
.mb-card__img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.mb-card:hover .mb-card__img img { transform: scale(1.05); }
.mb-card__body { padding: 1.5rem; display: flex; flex-direction: column; gap: .6rem; flex: 1; }
.mb-card__body .mb-num { font-family: "Syne"; font-size: .8rem; color: var(--sky-deep); }
.mb-card__body h3 { font-size: 1.28rem; }
.mb-card__body p { font-size: .9rem; color: var(--muted); flex: 1; }
.mb-card__body .mb-link { font-weight: 600; font-size: .88rem; display: inline-flex; gap: .4rem; align-items: center; color: var(--sky-deep); }

/* ---------------- split feature ---------------- */
.mb-split { display: grid; grid-template-columns: 1fr 1fr; gap: 1.4rem; align-items: center; }
.mb-split--rev .mb-split__media { order: 2; }
.mb-split__media { border-radius: var(--r-lg); overflow: hidden; aspect-ratio: 5/4; }
.mb-split__media img { width: 100%; height: 100%; object-fit: cover; }
.mb-split__copy h2 { font-size: clamp(1.8rem, 3.4vw, 2.7rem); margin: .8rem 0 1rem; }
.mb-split__copy p { color: var(--muted); margin-bottom: 1rem; }
.mb-ticks { list-style: none; display: grid; gap: .6rem; margin: 1.2rem 0 1.6rem; }
.mb-ticks li { display: flex; gap: .7rem; align-items: flex-start; font-size: .95rem; }
.mb-ticks li::before { content: "→"; color: var(--sky); font-weight: 700; }

/* ---------------- process steps ---------------- */
.mb-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; }
.mb-step { background: var(--sand-2); border-radius: var(--r); padding: 1.6rem; border: 1px solid var(--line); }
.mb-step__n { font-family: "Syne"; font-size: 2.6rem; font-weight: 800; color: var(--sky); line-height: 1; }
.mb-step h3 { font-size: 1.1rem; margin: .8rem 0 .4rem; }
.mb-step p { font-size: .88rem; color: var(--muted); }

/* ---------------- stats band ---------------- */
.mb-band { background: var(--ink); color: #fff; border-radius: var(--r-lg); padding: clamp(2rem,4vw,3.4rem); }
.mb-band__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; text-align: center; }
.mb-band .n { font-family: "Syne"; font-size: clamp(2.2rem,4vw,3.2rem); font-weight: 800; color: var(--amber); }
.mb-band .l { color: rgba(255,255,255,.66); font-size: .9rem; }

/* ---------------- projects gallery ---------------- */
.mb-gallery { display: grid; grid-template-columns: repeat(12, 1fr); gap: 1rem; }
.mb-tile { border-radius: var(--r); overflow: hidden; position: relative; min-height: 260px; }
.mb-tile img { width: 100%; height: 100%; object-fit: cover; position: absolute; inset: 0; transition: transform .5s; }
.mb-tile:hover img { transform: scale(1.05); }
.mb-tile__cap { position: absolute; left: 0; right: 0; bottom: 0; padding: 1.4rem; background: linear-gradient(transparent, rgba(22,24,29,.82)); color: #fff; }
.mb-tile__cap b { font-family: "Syne"; font-size: 1.15rem; display: block; }
.mb-tile__cap span { font-size: .82rem; opacity: .8; }
.mb-span-7 { grid-column: span 7; }
.mb-span-5 { grid-column: span 5; }
.mb-span-6 { grid-column: span 6; }
.mb-span-4 { grid-column: span 4; }
.mb-span-8 { grid-column: span 8; }
.mb-tall { min-height: 380px; }

/* ---------------- CTA ---------------- */
.mb-cta { position: relative; border-radius: var(--r-lg); overflow: hidden; color: #fff; padding: clamp(2.4rem,5vw,4.5rem); }
.mb-cta img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: 0; }
.mb-cta::after { content:""; position:absolute; inset:0; background: linear-gradient(120deg, rgba(22,24,29,.9), rgba(31,78,134,.6)); z-index: 1; }
.mb-cta__in { position: relative; z-index: 2; max-width: 640px; }
.mb-cta h2 { font-size: clamp(2rem,4.4vw,3.2rem); margin-bottom: 1rem; }
.mb-cta p { color: rgba(255,255,255,.82); margin-bottom: 1.6rem; }

/* ---------------- page hero (inner) ---------------- */
.mb-phero { padding: 3.4rem 0 2rem; }
.mb-phero h1 { font-size: clamp(2.4rem, 5vw, 4rem); font-weight: 800; margin: .8rem 0 1rem; max-width: 16ch; }
.mb-phero p { color: var(--muted); max-width: 52ch; font-size: 1.08rem; }
.mb-crumb { font-size: .82rem; color: var(--muted); }
.mb-crumb a:hover { color: var(--sky-deep); }

/* ---------------- values ---------------- */
.mb-values { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.mb-value { padding: 1.8rem; border-radius: var(--r); background: var(--bone); border: 1px solid var(--line); }
.mb-value h3 { font-size: 1.25rem; margin: .8rem 0 .5rem; }
.mb-value p { font-size: .9rem; color: var(--muted); }
.mb-value__ic { width: 46px; height: 46px; border-radius: 12px; background: var(--sky); color: #fff; display: grid; place-items: center; font-family: "Syne"; font-weight: 800; }

/* ---------------- team ---------------- */
.mb-team { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.mb-member { border-radius: var(--r); overflow: hidden; background: var(--bone); border: 1px solid var(--line); }
.mb-member__img { aspect-ratio: 1; overflow: hidden; }
.mb-member__img img { width: 100%; height: 100%; object-fit: cover; }
.mb-member__b { padding: 1.2rem; }
.mb-member__b b { font-family: "Syne"; font-size: 1.05rem; }
.mb-member__b span { font-size: .84rem; color: var(--muted); }

/* ---------------- service detail rows ---------------- */
.mb-srow { display: grid; grid-template-columns: .8fr 1.2fr; gap: 2rem; padding: 2.2rem 0; border-top: 1px solid var(--line); align-items: start; }
.mb-srow:last-child { border-bottom: 1px solid var(--line); }
.mb-srow__n { font-family: "Syne"; font-size: 3rem; font-weight: 800; color: var(--sky); }
.mb-srow h3 { font-size: 1.5rem; margin-bottom: .8rem; }
.mb-srow p { color: var(--muted); margin-bottom: 1rem; }
.mb-srow .mb-tags { display: flex; flex-wrap: wrap; gap: .5rem; }
.mb-srow .mb-tags span { font-size: .8rem; font-weight: 600; padding: .4rem .8rem; border-radius: 999px; background: var(--sand-2); border: 1px solid var(--line); }

/* ---------------- contact ---------------- */
.mb-contact { display: grid; grid-template-columns: .9fr 1.1fr; gap: 2rem; align-items: start; }
.mb-cinfo { display: grid; gap: 1.4rem; }
.mb-cinfo__item h4 { font-family: "Syne"; font-size: .8rem; letter-spacing: .1em; text-transform: uppercase; color: var(--sky-deep); margin-bottom: .4rem; }
.mb-cinfo__item p, .mb-cinfo__item a { color: var(--ink); font-size: 1rem; }
.mb-cinfo__item a:hover { color: var(--sky-deep); }
.mb-form { background: var(--bone); border: 1px solid var(--line); border-radius: var(--r-lg); padding: 2rem; display: grid; gap: 1rem; }
.mb-field { display: grid; gap: .4rem; }
.mb-field label { font-size: .85rem; font-weight: 600; }
.mb-field input, .mb-field select, .mb-field textarea {
  width: 100%; padding: .85rem 1rem; border: 1px solid var(--line); border-radius: 12px;
  font: inherit; background: var(--sand-2); color: var(--ink); outline: none; transition: border-color .2s;
}
.mb-field input:focus, .mb-field select:focus, .mb-field textarea:focus { border-color: var(--sky); }
.mb-field textarea { min-height: 120px; resize: vertical; }
.mb-map { border-radius: var(--r); overflow: hidden; margin-top: 1rem; aspect-ratio: 16/7; }
.mb-map img { width: 100%; height: 100%; object-fit: cover; }

/* ---------------- legal ---------------- */
.mb-legal { max-width: 760px; }
.mb-legal h2 { font-size: 1.4rem; margin: 2rem 0 .8rem; }
.mb-legal p { color: var(--muted); margin-bottom: 1rem; }
.mb-legal ul { color: var(--muted); margin: 0 0 1rem 1.2rem; display: grid; gap: .4rem; }

/* ---------------- footer ---------------- */
.mb-footer { background: var(--ink); color: #fff; margin-top: 3rem; padding: 3.4rem 0 1.6rem; border-radius: var(--r-lg) var(--r-lg) 0 0; }
.mb-footer__top { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 2rem; padding-bottom: 2.4rem; border-bottom: 1px solid var(--line-light); }
.mb-footer__brand p { color: rgba(255,255,255,.6); font-size: .92rem; margin-top: 1rem; max-width: 30ch; }
.mb-footer h5 { font-family: "Syne"; font-size: .78rem; letter-spacing: .12em; text-transform: uppercase; color: rgba(255,255,255,.45); margin-bottom: 1rem; }
.mb-footer a, .mb-footer p.f { color: rgba(255,255,255,.8); font-size: .92rem; display: block; margin-bottom: .5rem; }
.mb-footer a:hover { color: var(--amber); }
.mb-footer__bottom { display: flex; justify-content: space-between; align-items: center; gap: 1rem; flex-wrap: wrap; margin-top: 1.6rem; font-size: .82rem; color: rgba(255,255,255,.5); }

/* ---------------- cookie ---------------- */
.mb-cookie { position: fixed; left: 1rem; bottom: 1rem; z-index: 90; max-width: 350px; background: var(--bone); border: 1px solid var(--line); border-radius: var(--r); padding: 1.2rem; box-shadow: var(--shadow); display: none; }
.mb-cookie.show { display: block; }
.mb-cookie p { font-size: .85rem; color: var(--muted); margin-bottom: .9rem; }
.mb-cookie .row { display: flex; gap: .5rem; }
.mb-cookie .mb-btn { padding: .55rem 1rem; font-size: .82rem; }

/* ---------------- responsive ---------------- */
@media (max-width: 960px) {
  .mb-nav, .mb-header__cta .mb-btn--ghost { display: none; }
  .mb-burger { display: grid; place-items: center; }
  .mb-header__in.open { flex-wrap: wrap; }
  .mb-header__in.open .mb-nav { display: flex; flex-direction: column; width: 100%; gap: 1rem; padding-top: 1rem; }
  .mb-hero__grid, .mb-split, .mb-contact { grid-template-columns: 1fr; }
  .mb-split--rev .mb-split__media { order: 0; }
  .mb-svc, .mb-values, .mb-team { grid-template-columns: repeat(2, 1fr); }
  .mb-steps, .mb-band__grid { grid-template-columns: repeat(2, 1fr); }
  .mb-gallery > * { grid-column: span 12 !important; }
  .mb-srow { grid-template-columns: 1fr; gap: .8rem; }
}
@media (max-width: 560px) {
  .mb-svc, .mb-values, .mb-team, .mb-steps, .mb-band__grid { grid-template-columns: 1fr; }
  .mb-hero__stats { gap: 1.4rem; flex-wrap: wrap; }
  .mb-footer__top { grid-template-columns: 1fr 1fr; }
}