/* ===================================================================
   KATEBE STRUCTURAL ENGINEERING LTD — shared stylesheet
   Edit brand colours / type here once; applies to every page.
   =================================================================== */
:root{
  --paper:   #EEF1F5;
  --white:   #FFFFFF;
  --ink:     #14181F;
  --ink-2:   #1C2129;
  --text:    #1A1F27;
  --muted:   #5E6875;
  --line:    #DCE2EA;
  --line-d:  #2C3540;
  --steel:   #1F5C8C;
  --steel-2: #5B97CF;
  --amber:   #DD8A1C;
  --max: 1140px;
}
*{ box-sizing:border-box; margin:0; padding:0; }
html{ scroll-behavior:smooth; }
body{ background:var(--paper); color:var(--text); font-family:"IBM Plex Sans",system-ui,sans-serif; line-height:1.62; -webkit-font-smoothing:antialiased; overflow-x:hidden; }
a{ color:inherit; text-decoration:none; }
.mono{ font-family:"IBM Plex Mono",monospace; }
.wrap{ max-width:var(--max); margin:0 auto; padding:0 32px; }

.eyebrow{ font-family:"IBM Plex Mono",monospace; font-size:.7rem; letter-spacing:.26em; text-transform:uppercase; color:var(--steel); display:inline-flex; align-items:center; gap:12px; }
.eyebrow::before{ content:""; width:30px; height:1px; background:var(--steel); opacity:.5; }
.on-dark .eyebrow{ color:var(--steel-2); }
.on-dark .eyebrow::before{ background:var(--steel-2); }

.tbc{ font-family:"IBM Plex Mono",monospace; font-size:.66em; letter-spacing:.02em; color:var(--amber); border:1px dashed rgba(221,138,28,.55); border-radius:4px; padding:.08em .5em; white-space:nowrap; vertical-align:middle; }

.sec-head{ max-width:62ch; margin-bottom:54px; }
.sec-head h2{ font-family:"Archivo"; font-weight:800; letter-spacing:-.015em; font-size:clamp(1.8rem,3.6vw,2.65rem); line-height:1.1; margin:16px 0 14px; }
.sec-head p{ color:var(--muted); font-size:1.04rem; }

/* ---------- HEADER ---------- */
header{ position:sticky; top:0; z-index:50; background:rgba(238,241,245,.9); backdrop-filter:blur(12px); border-bottom:1px solid var(--line); }
.nav{ display:flex; align-items:center; justify-content:space-between; height:72px; }
.brand{ display:flex; align-items:center; gap:12px; }
.logo{ width:38px; height:38px; flex:none; border-radius:8px; background:var(--ink); display:flex; align-items:center; justify-content:center; }
.logo svg{ width:21px; height:21px; }
.brand-txt{ display:flex; flex-direction:column; line-height:1.04; }
.brand-txt .nm{ font-family:"Archivo"; font-weight:800; font-size:.95rem; letter-spacing:.01em; }
.brand-txt .sub{ font-family:"IBM Plex Mono"; font-size:.58rem; letter-spacing:.26em; color:var(--muted); text-transform:uppercase; margin-top:2px; }
nav.links{ display:flex; gap:32px; align-items:center; }
nav.links a{ font-size:.88rem; color:var(--muted); transition:color .2s; position:relative; }
nav.links a:hover{ color:var(--text); }
nav.links a.active{ color:var(--text); }
nav.links a.active::after{ content:""; position:absolute; left:0; right:0; bottom:-26px; height:2px; background:var(--amber); }
.btn{ font-family:"IBM Plex Mono",monospace; font-size:.78rem; letter-spacing:.04em; padding:11px 20px; border-radius:8px; background:var(--ink); color:#fff; border:1px solid var(--ink); transition:transform .15s,box-shadow .2s,background .2s; display:inline-block; cursor:pointer; }
.btn:hover{ transform:translateY(-1px); box-shadow:0 10px 26px rgba(20,24,31,.18); }
.btn.amber{ background:var(--amber); border-color:var(--amber); color:#231503; }
.btn.amber:hover{ box-shadow:0 10px 26px rgba(221,138,28,.3); }
.btn.ghost{ background:transparent; color:var(--text); border-color:var(--line); }
.btn.ghost:hover{ border-color:var(--ink); box-shadow:none; }
.on-dark .btn.ghost{ color:#fff; border-color:var(--line-d); }
.on-dark .btn.ghost:hover{ border-color:var(--steel-2); }
.menu-btn{ display:none; background:none; border:1px solid var(--line); border-radius:7px; padding:8px 12px; cursor:pointer; font-size:1.05rem; }

/* mobile nav panel */
@media(max-width:920px){
  nav.links{ position:fixed; inset:72px 0 auto 0; background:var(--white); flex-direction:column; gap:0; padding:8px 0; border-bottom:1px solid var(--line); transform:translateY(-120%); transition:transform .28s ease; z-index:40; }
  body.nav-open nav.links{ transform:translateY(0); }
  nav.links a{ padding:16px 32px; width:100%; font-size:1rem; }
  nav.links a.active::after{ display:none; }
  .nav .btn.amber{ display:none; }
  .menu-btn{ display:inline-block; }
}

/* ---------- PAGE HERO (interior pages) ---------- */
.page-hero{ background:var(--ink); color:#fff; position:relative; overflow:hidden; }
.page-hero::before{ content:""; position:absolute; inset:0; background-image:linear-gradient(var(--line-d) 1px,transparent 1px),linear-gradient(90deg,var(--line-d) 1px,transparent 1px); background-size:54px 54px; opacity:.35; -webkit-mask-image:radial-gradient(120% 120% at 80% 20%,#000 20%,transparent 70%); mask-image:radial-gradient(120% 120% at 80% 20%,#000 20%,transparent 70%); }
.page-hero .wrap{ position:relative; padding:74px 0 70px; }
.crumb{ font-family:"IBM Plex Mono"; font-size:.7rem; letter-spacing:.14em; text-transform:uppercase; color:#8A93A0; margin-bottom:18px; }
.crumb a:hover{ color:#fff; }
.page-hero h1{ font-family:"Archivo"; font-weight:900; letter-spacing:-.02em; font-size:clamp(2.2rem,5vw,3.4rem); line-height:1.04; }
.page-hero p{ color:#AEB6C2; font-size:1.06rem; max-width:52ch; margin-top:18px; }

/* ---------- HOME HERO ---------- */
.hero{ background:var(--ink); color:#fff; position:relative; overflow:hidden; }
.hero::before{ content:""; position:absolute; inset:0; background-image:linear-gradient(var(--line-d) 1px,transparent 1px),linear-gradient(90deg,var(--line-d) 1px,transparent 1px); background-size:58px 58px; opacity:.4; -webkit-mask-image:radial-gradient(120% 90% at 70% 30%,#000 30%,transparent 75%); mask-image:radial-gradient(120% 90% at 70% 30%,#000 30%,transparent 75%); }
.hero-inner{ position:relative; display:grid; grid-template-columns:1.02fr .98fr; gap:56px; align-items:center; padding:92px 0 96px; }
.hero h1{ font-family:"Archivo"; font-weight:900; letter-spacing:-.025em; font-size:clamp(2.6rem,5.8vw,4.4rem); line-height:1.0; margin:22px 0 22px; }
.hero h1 .amber{ color:var(--amber); }
.hero .lead{ color:#AEB6C2; font-size:1.08rem; max-width:36ch; margin-bottom:34px; }
.hero-cta{ display:flex; gap:14px; flex-wrap:wrap; }
.frame-art svg{ width:100%; height:auto; display:block; overflow:visible; }
.draw{ stroke-dasharray:1400; stroke-dashoffset:1400; animation:draw 2.2s ease forwards; }
.draw.d2{ animation-delay:.3s; } .draw.d3{ animation-delay:.6s; }
@keyframes draw{ to{ stroke-dashoffset:0; } }
.pop{ opacity:0; animation:pop .6s ease .4s forwards; }
@keyframes pop{ to{ opacity:1; } }

/* ---------- STATS ---------- */
.stats{ background:var(--white); border-bottom:1px solid var(--line); }
.stats-row{ display:grid; grid-template-columns:repeat(4,1fr); }
.stat{ padding:34px 28px; border-right:1px solid var(--line); }
.stat:last-child{ border-right:none; }
.stat .n{ font-family:"Archivo"; font-weight:800; font-size:2.2rem; line-height:1; margin-bottom:9px; }
.stat .n .amber{ color:var(--amber); }
.stat .l{ font-family:"IBM Plex Mono"; font-size:.68rem; letter-spacing:.12em; text-transform:uppercase; color:var(--muted); }

/* ---------- SECTION SHELL ---------- */
section.block{ padding:100px 0; }
.block.alt{ background:var(--white); border-top:1px solid var(--line); border-bottom:1px solid var(--line); }

/* ---------- SERVICES ---------- */
.svc-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:18px; }
.svc{ background:var(--white); border:1px solid var(--line); border-radius:14px; padding:30px 26px; transition:transform .2s,box-shadow .25s,border-color .2s; }
.block.alt .svc{ background:var(--paper); }
.svc:hover{ transform:translateY(-3px); box-shadow:0 14px 34px rgba(20,24,31,.08); border-color:#C6D0DC; }
.svc .top{ display:flex; align-items:center; justify-content:space-between; margin-bottom:20px; }
.svc .num{ font-family:"IBM Plex Mono"; font-size:.74rem; letter-spacing:.08em; color:var(--steel); }
.svc .ic{ width:38px; height:38px; border-radius:9px; background:rgba(31,92,140,.09); display:flex; align-items:center; justify-content:center; color:var(--steel); }
.svc .ic svg{ width:19px; height:19px; }
.svc h3{ font-family:"Archivo"; font-weight:700; font-size:1.12rem; margin-bottom:9px; }
.svc p{ color:var(--muted); font-size:.91rem; }

/* ---------- PROCESS ---------- */
.proc{ display:grid; grid-template-columns:repeat(4,1fr); gap:26px; }
.step{ position:relative; padding-top:30px; }
.step::before{ content:""; position:absolute; top:0; left:0; right:0; height:3px; border-radius:2px; background:var(--amber); }
.step .k{ font-family:"IBM Plex Mono"; color:var(--steel); font-size:.72rem; letter-spacing:.12em; margin-bottom:14px; }
.step h4{ font-family:"Archivo"; font-weight:700; font-size:1.14rem; margin-bottom:9px; }
.step p{ color:var(--muted); font-size:.9rem; }

/* ---------- WHY ---------- */
.why-grid{ display:grid; grid-template-columns:.92fr 1.08fr; gap:60px; align-items:center; }
.why-list{ list-style:none; }
.why-list li{ padding:20px 0; border-bottom:1px solid var(--line); display:flex; gap:18px; }
.why-list li:first-child{ border-top:1px solid var(--line); }
.why-list .dot{ flex:none; width:30px; height:30px; border-radius:50%; background:var(--ink); color:#fff; display:flex; align-items:center; justify-content:center; font-family:"IBM Plex Mono"; font-size:.72rem; }
.why-list h4{ font-family:"Archivo"; font-weight:700; font-size:1.02rem; margin-bottom:3px; }
.why-list p{ color:var(--muted); font-size:.9rem; }
.why-quote{ background:var(--ink); color:#fff; border-radius:18px; padding:46px 42px; position:relative; overflow:hidden; }
.why-quote::after{ content:""; position:absolute; right:-40px; bottom:-40px; width:200px; height:200px; border:1.5px solid var(--line-d); border-radius:50%; opacity:.5; }
.why-quote .tag{ font-family:"IBM Plex Mono"; font-size:.66rem; letter-spacing:.2em; color:var(--steel-2); text-transform:uppercase; }
.why-quote blockquote{ font-family:"Archivo"; font-weight:700; font-size:1.5rem; line-height:1.28; margin:20px 0 26px; letter-spacing:-.01em; position:relative; }
.why-quote .credit{ color:#AEB6C2; font-size:.88rem; position:relative; }

/* ---------- PROJECTS ---------- */
.proj-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:22px; }
.proj{ border:1px dashed #BFCBD8; border-radius:14px; aspect-ratio:4/3; display:flex; flex-direction:column; align-items:center; justify-content:center; gap:12px; color:var(--muted); text-align:center; background:rgba(31,92,140,.04); }
.proj svg{ width:32px; height:32px; opacity:.55; }
.proj .t{ font-family:"IBM Plex Mono"; font-size:.72rem; letter-spacing:.06em; }

/* ---------- CTA BAND ---------- */
.cta-band{ background:var(--ink); color:#fff; text-align:center; }
.cta-band .wrap{ padding:84px 32px; }
.cta-band h2{ font-family:"Archivo"; font-weight:900; font-size:clamp(1.9rem,4vw,2.9rem); line-height:1.08; letter-spacing:-.02em; margin-bottom:16px; }
.cta-band h2 .amber{ color:var(--amber); }
.cta-band p{ color:#AEB6C2; max-width:46ch; margin:0 auto 30px; }

/* ---------- CONTACT ---------- */
.contact-grid{ display:grid; grid-template-columns:1.05fr .95fr; gap:60px; align-items:start; }
.info-row{ display:flex; align-items:center; gap:16px; padding:18px 0; border-bottom:1px solid var(--line); }
.info-row:first-of-type{ border-top:1px solid var(--line); }
.info-row .ic{ width:40px; height:40px; flex:none; border:1px solid var(--line); border-radius:9px; display:flex; align-items:center; justify-content:center; color:var(--steel); }
.info-row .ic svg{ width:18px; height:18px; }
.info-row .lbl{ font-family:"IBM Plex Mono"; font-size:.64rem; letter-spacing:.16em; text-transform:uppercase; color:var(--muted); margin-bottom:3px; }
.info-row .val{ font-size:.98rem; }
.form-card{ background:var(--white); border:1px solid var(--line); border-radius:18px; padding:38px; }
.form-card h3{ font-family:"Archivo"; font-weight:800; font-size:1.4rem; margin-bottom:6px; }
.form-card .hint{ color:var(--muted); font-size:.9rem; margin-bottom:24px; }
.field{ margin-bottom:16px; }
.field label{ display:block; font-family:"IBM Plex Mono"; font-size:.66rem; letter-spacing:.12em; text-transform:uppercase; color:var(--muted); margin-bottom:7px; }
.field input,.field textarea,.field select{ width:100%; padding:12px 14px; border:1px solid var(--line); border-radius:9px; font:inherit; font-size:.95rem; background:var(--paper); color:var(--text); }
.field input:focus,.field textarea:focus,.field select:focus{ outline:none; border-color:var(--steel); background:#fff; }
.form-card .btn{ width:100%; text-align:center; padding:14px; margin-top:6px; }
.map-ph{ margin-top:22px; border:1px dashed #BFCBD8; border-radius:14px; aspect-ratio:16/7; display:flex; align-items:center; justify-content:center; color:var(--muted); background:rgba(31,92,140,.04); font-family:"IBM Plex Mono"; font-size:.74rem; letter-spacing:.06em; }

/* ---------- FOOTER ---------- */
footer{ background:var(--ink); color:#fff; border-top:1px solid var(--line-d); }
.foot-top{ display:grid; grid-template-columns:1.4fr 1fr 1fr; gap:40px; padding:56px 0 44px; }
.foot-col h5{ font-family:"IBM Plex Mono"; font-size:.66rem; letter-spacing:.18em; text-transform:uppercase; color:#8A93A0; margin-bottom:16px; }
.foot-col a, .foot-col p{ display:block; color:#C2C9D2; font-size:.9rem; margin-bottom:10px; }
.foot-col a:hover{ color:#fff; }
.foot-brand .brand-txt .nm{ font-size:1rem; color:#fff; }
.foot-brand p{ color:#8A93A0; max-width:36ch; margin-top:14px; font-size:.88rem; }
.foot-bottom{ border-top:1px solid var(--line-d); padding:22px 0; display:flex; justify-content:space-between; flex-wrap:wrap; gap:12px; }
.foot-bottom .mono{ font-size:.72rem; color:#8A93A0; letter-spacing:.03em; }

/* ---------- reveal ---------- */
.reveal{ opacity:0; transform:translateY(18px); transition:opacity .6s ease,transform .6s ease; }
.reveal.in{ opacity:1; transform:none; }

@media(max-width:920px){
  .hero-inner{ grid-template-columns:1fr; gap:46px; padding:64px 0 70px; }
  .frame-art{ order:-1; max-width:440px; }
  .stats-row{ grid-template-columns:1fr 1fr; }
  .stat:nth-child(2){ border-right:none; }
  .stat:nth-child(1),.stat:nth-child(2){ border-bottom:1px solid var(--line); }
  .svc-grid{ grid-template-columns:1fr 1fr; }
  .proc{ grid-template-columns:1fr 1fr; gap:34px; }
  .why-grid, .contact-grid{ grid-template-columns:1fr; gap:40px; }
  .proj-grid{ grid-template-columns:1fr 1fr; }
  .foot-top{ grid-template-columns:1fr 1fr; gap:32px; }
}
@media(max-width:560px){
  .wrap{ padding:0 20px; }
  section.block{ padding:68px 0; }
  .svc-grid, .stats-row, .proc, .proj-grid{ grid-template-columns:1fr; }
  .sec-head{ margin-bottom:38px; }
  .foot-top{ grid-template-columns:1fr; }
}
@media(prefers-reduced-motion:reduce){
  .draw,.pop{ animation:none; stroke-dashoffset:0; opacity:1; }
  .reveal{ transition:none; opacity:1; transform:none; }
  html{ scroll-behavior:auto; }
}
:focus-visible{ outline:2px solid var(--amber); outline-offset:3px; border-radius:4px; }