/* ============================================================
   RUWAD DANA TECHNICAL SERVICES LLC — shared stylesheet
   ============================================================ */

/* ============ TOKENS ============ */
:root{
  --navy-deep:#0A1F33;
  --navy:#123A5C;
  --steel:#2F4C63;
  --amber:#E2811E;
  --amber-light:#F2A94E;
  --paper:#F5F5F2;
  --panel:#FFFFFF;
  --ink:#16202B;
  --slate:#5C6B78;
  --line: rgba(10,31,51,0.14);
  --line-light: rgba(255,255,255,0.16);

  --font-display:'Oswald', sans-serif;
  --font-body:'Source Sans 3', sans-serif;
  --font-mono:'IBM Plex Mono', monospace;

  --container: 1160px;
  --ease: cubic-bezier(.16,.84,.32,1);
}

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *{ animation-duration:0.001ms !important; transition-duration:0.001ms !important; }
}

img{ max-width:100%; display:block; }
a{ color:inherit; }
h1,h2,h3,h4{ font-family:var(--font-display); font-weight:600; margin:0; letter-spacing:0.01em; }
p{ margin:0 0 1em; color:var(--slate); }
.container{ max-width:var(--container); margin:0 auto; padding:0 24px; }

:focus-visible{ outline:2px solid var(--amber); outline-offset:3px; }

/* ============ BLUEPRINT SIGNATURE ELEMENTS ============ */
.grid-field{
  background-image:
    linear-gradient(var(--line-light) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-light) 1px, transparent 1px);
  background-size: 44px 44px;
}
.grid-field--light{
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 44px 44px;
}
.reg-marks{ position:relative; }
.reg-marks::before,
.reg-marks::after{
  content:"";
  position:absolute;
  width:22px; height:22px;
  pointer-events:none;
}
.reg-marks::before{ top:18px; left:18px; border-top:2px solid var(--amber); border-left:2px solid var(--amber); }
.reg-marks::after{ bottom:18px; right:18px; border-bottom:2px solid var(--amber); border-right:2px solid var(--amber); }
.sheet-tag{
  font-family:var(--font-mono); font-size:12px; letter-spacing:0.14em;
  text-transform:uppercase; color:var(--amber);
}

/* duotone treatment for photography — keeps every image on-brand */
.photo{
  position:relative; overflow:hidden; background:var(--navy-deep);
}
.photo img{ width:100%; height:100%; object-fit:cover; display:block; filter:grayscale(0.35) contrast(1.05); transition:transform 1.2s var(--ease); }
.photo::after{
  content:""; position:absolute; inset:0;
  background:linear-gradient(155deg, rgba(10,31,51,0.72) 0%, rgba(10,31,51,0.28) 46%, rgba(226,129,30,0.22) 100%);
  mix-blend-mode:multiply;
  pointer-events:none;
}
.photo:hover img{ transform:scale(1.045); }
.photo .cap{
  position:absolute; left:0; right:0; bottom:0; z-index:2;
  padding:14px 18px; font-family:var(--font-mono); font-size:11px; letter-spacing:0.08em;
  text-transform:uppercase; color:#fff; display:flex; justify-content:space-between; gap:10px;
  background:linear-gradient(to top, rgba(10,31,51,0.85), transparent);
}
.photo .cap .fig{ color:var(--amber-light); }

/* ============ MOTION / REVEAL ============ */
.stagger > *{
  opacity:0; transform:translateY(22px);
  animation:reveal-up .8s var(--ease) forwards;
}
.stagger > *:nth-child(1){ animation-delay:.05s; }
.stagger > *:nth-child(2){ animation-delay:.16s; }
.stagger > *:nth-child(3){ animation-delay:.27s; }
.stagger > *:nth-child(4){ animation-delay:.38s; }
.stagger > *:nth-child(5){ animation-delay:.49s; }
.stagger > *:nth-child(6){ animation-delay:.60s; }
@keyframes reveal-up{ to{ opacity:1; transform:translateY(0); } }

[data-reveal]{
  opacity:0; transform:translateY(28px);
  transition:opacity .8s var(--ease), transform .8s var(--ease);
}
[data-reveal].is-visible{ opacity:1; transform:translateY(0); }
[data-reveal-group].is-visible > *{ opacity:1; transform:translateY(0); }
[data-reveal-group] > *{
  opacity:0; transform:translateY(20px);
  transition:opacity .7s var(--ease), transform .7s var(--ease);
}
[data-reveal-group].is-visible > *:nth-child(1){ transition-delay:.02s; }
[data-reveal-group].is-visible > *:nth-child(2){ transition-delay:.10s; }
[data-reveal-group].is-visible > *:nth-child(3){ transition-delay:.18s; }
[data-reveal-group].is-visible > *:nth-child(4){ transition-delay:.26s; }
[data-reveal-group].is-visible > *:nth-child(5){ transition-delay:.34s; }
[data-reveal-group].is-visible > *:nth-child(6){ transition-delay:.42s; }

/* page-load curtain */
.curtain{
  position:fixed; inset:0; z-index:999; background:var(--navy-deep);
  display:flex; align-items:center; justify-content:center;
  animation:curtain-out .9s var(--ease) forwards; animation-delay:.35s;
}
.curtain span{
  font-family:var(--font-mono); font-size:12px; letter-spacing:.22em; color:var(--amber);
  text-transform:uppercase; opacity:0; animation:curtain-label .5s ease forwards .1s;
}
@keyframes curtain-label{ to{ opacity:1; } }
@keyframes curtain-out{
  0%{ clip-path:inset(0 0 0 0); }
  100%{ clip-path:inset(0 0 100% 0); pointer-events:none; }
}

/* ============ HEADER ============ */
header{
  position:sticky; top:0; z-index:50;
  background:var(--navy-deep);
  border-bottom:1px solid var(--line-light);
}
.nav-row{ display:flex; align-items:center; justify-content:space-between; height:76px; }
.brand{ display:flex; align-items:center; gap:12px; text-decoration:none; }
.brand-mark{ background:#fff; border-radius:6px; padding:5px 8px; display:flex; align-items:center; height:44px; }
.brand-mark img{ height:100%; width:auto; }
.brand-text{ display:flex; flex-direction:column; line-height:1.1; color:#fff; }
.brand-text strong{ font-family:var(--font-display); font-size:15px; letter-spacing:0.03em; }
.brand-text span{ font-family:var(--font-mono); font-size:10.5px; color:var(--amber-light); letter-spacing:0.12em; margin-top:3px; }

nav.primary-nav{ display:flex; align-items:center; gap:32px; }
nav.primary-nav a{
  text-decoration:none; color:#DCE4EC; font-size:14.5px; font-weight:500;
  position:relative; padding:6px 0;
}
nav.primary-nav a:hover{ color:#fff; }
nav.primary-nav a.active{ color:#fff; }
nav.primary-nav a.active::after{
  content:""; position:absolute; left:0; right:0; bottom:-2px; height:2px; background:var(--amber);
}
nav.primary-nav a.cta{ background:var(--amber); color:var(--navy-deep); font-weight:600; padding:9px 18px; border-radius:2px; }
nav.primary-nav a.cta:hover{ background:var(--amber-light); }

.nav-toggle{
  display:none; background:none; border:1px solid var(--line-light); color:#fff;
  width:42px; height:42px; border-radius:4px; cursor:pointer;
  align-items:center; justify-content:center;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after{
  content:""; display:block; width:18px; height:2px; background:#fff; position:relative;
}
.nav-toggle span::before{ position:absolute; top:-6px; }
.nav-toggle span::after{ position:absolute; top:6px; }

@media (max-width: 860px){
  nav.primary-nav{
    position:absolute; top:76px; left:0; right:0;
    background:var(--navy-deep); flex-direction:column; align-items:stretch;
    padding:8px 24px 20px; gap:2px; border-bottom:1px solid var(--line-light);
    display:none;
  }
  nav.primary-nav.open{ display:flex; }
  nav.primary-nav a{ padding:12px 0; border-bottom:1px solid rgba(255,255,255,0.06); }
  nav.primary-nav a.cta{ margin-top:10px; text-align:center; }
  .nav-toggle{ display:flex; }
}

/* ============ PAGE HERO (interior pages) ============ */
.page-hero{
  background:var(--navy-deep); color:#fff; position:relative; overflow:hidden;
  padding:64px 0 56px;
}
.page-hero .sheet-tag{ margin-bottom:16px; display:block; }
.page-hero h1{
  font-size:clamp(30px, 5vw, 48px); line-height:1.08; color:#fff; text-transform:uppercase;
}
.page-hero p{ color:#AEBBC8; margin-top:16px; max-width:620px; font-size:16px; }
.page-hero .crumb{
  font-family:var(--font-mono); font-size:11.5px; letter-spacing:.1em; color:#7E8FA0;
  text-transform:uppercase; margin-bottom:18px; display:flex; gap:8px; align-items:center;
}
.page-hero .crumb a{ text-decoration:none; color:#9FADBB; }
.page-hero .crumb a:hover{ color:var(--amber-light); }

/* ============ HERO (home) ============ */
.hero{ background: var(--navy-deep); color:#fff; position:relative; overflow:hidden; padding:96px 0 0; }
.hero-inner{ position:relative; z-index:2; max-width:760px; padding-bottom:84px; }
.hero .sheet-tag{ margin-bottom:22px; display:block; }
.hero h1{ font-size:clamp(34px, 5.6vw, 58px); line-height:1.06; color:#fff; text-transform:uppercase; }
.hero h1 em{ font-style:normal; color:var(--amber); }
.hero .tagline{ font-family:var(--font-display); font-size:clamp(16px, 2vw, 20px); color:#B9C6D3; margin-top:20px; font-weight:400; letter-spacing:0.01em; }
.hero .lede{ color:#AEBBC8; margin-top:20px; font-size:16px; max-width:620px; }
.hero-actions{ display:flex; gap:14px; margin-top:34px; flex-wrap:wrap; }
.btn{
  font-family:var(--font-body); font-weight:600; font-size:14.5px;
  padding:13px 26px; border-radius:2px; text-decoration:none;
  display:inline-flex; align-items:center; gap:8px; border:1px solid transparent; cursor:pointer;
}
.btn-amber{ background:var(--amber); color:var(--navy-deep); }
.btn-amber:hover{ background:var(--amber-light); }
.btn-outline{ border-color:rgba(255,255,255,0.35); color:#fff; }
.btn-outline:hover{ border-color:#fff; background:rgba(255,255,255,0.06); }

.hero-stats{ display:grid; grid-template-columns:repeat(4,1fr); gap:0; margin-top:64px; border-top:1px solid var(--line-light); max-width:900px; }
.hero-stats div{ padding:18px 18px 0; border-left:1px solid var(--line-light); }
.hero-stats div:first-child{ border-left:none; padding-left:0; }
.hero-stats .num{ font-family:var(--font-display); font-size:26px; color:var(--amber); }
.hero-stats .lbl{ font-family:var(--font-mono); font-size:11px; letter-spacing:0.08em; color:#9FADBB; margin-top:6px; text-transform:uppercase; }
@media (max-width:700px){
  .hero-stats{ grid-template-columns:repeat(2,1fr); }
  .hero-stats div{ border-left:none; border-top:1px solid var(--line-light); padding-top:14px; margin-top:14px; }
  .hero-stats div:first-child{ border-top:none; margin-top:0; }
}
.hero-photo{ position:relative; z-index:1; height:280px; margin-top:8px; }
@media (min-width:960px){ .hero-photo{ height:360px; } }

/* ============ SECTION SHELL ============ */
section{ padding:88px 0; }
.section-head{ max-width:640px; margin-bottom:48px; }
.section-head .sheet-tag{ display:block; margin-bottom:14px; }
.section-head h2{ font-size:clamp(26px,3.4vw, 36px); color:var(--navy-deep); text-transform:uppercase; }
.section-head p{ margin-top:14px; }
.section-alt{ background:var(--panel); border-top:1px solid var(--line); border-bottom:1px solid var(--line); }
.section-dark{ background:var(--navy-deep); color:#fff; }
.section-dark p{ color:#B9C6D3; }
.section-dark .section-head h2{ color:#fff; }

/* ============ ABOUT ============ */
.about-grid{ display:grid; grid-template-columns:1.1fr 0.9fr; gap:56px; align-items:start; }
.about-copy p{ color:var(--ink); opacity:0.86; }
.vm-cards{ display:grid; gap:18px; }
.vm-card{ background:var(--panel); border:1px solid var(--line); padding:26px 24px; border-top:3px solid var(--amber); }
.vm-card h3{ font-size:15px; text-transform:uppercase; letter-spacing:0.06em; color:var(--navy-deep); margin-bottom:12px; }
.vm-card ul{ margin:0; padding-left:18px; color:var(--slate); font-size:14.5px; }
.vm-card li{ margin-bottom:8px; }
@media (max-width:860px){ .about-grid{ grid-template-columns:1fr; } .vm-cards[style]{ grid-template-columns:1fr !important; } }

/* ============ VALUES ============ */
.values-grid{ display:grid; grid-template-columns:repeat(4,1fr); gap:1px; background:var(--line); border:1px solid var(--line); }
.value-cell{ background:var(--panel); padding:28px 22px; }
.value-cell .idx{ font-family:var(--font-mono); font-size:11px; color:var(--amber); letter-spacing:0.1em; }
.value-cell h3{ font-size:17px; margin-top:10px; color:var(--navy-deep); }
.value-cell p{ font-size:14px; margin-top:8px; margin-bottom:0; }
@media (max-width:860px){ .values-grid{ grid-template-columns:repeat(2,1fr); } }
@media (max-width:520px){ .values-grid{ grid-template-columns:1fr; } }

/* ============ SECTOR / TEASER CARDS (home) ============ */
.sector-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:22px; }
.sector-card{ background:var(--panel); border:1px solid var(--line); }
.sector-card .photo{ height:200px; }
.sector-card .body{ padding:22px 22px 26px; }
.sector-card h3{ font-size:17px; color:var(--navy-deep); text-transform:uppercase; margin-bottom:8px; }
.sector-card p{ font-size:14.5px; margin-bottom:0; }
@media (max-width:860px){ .sector-grid{ grid-template-columns:1fr; } }

/* ============ SERVICES (SHEETS) ============ */
.sheets{ display:flex; flex-direction:column; gap:14px; }
.sheet{ background:var(--panel); border:1px solid var(--line); border-left:4px solid var(--steel); }
.sheet[open]{ border-left-color:var(--amber); }
.sheet summary{ list-style:none; cursor:pointer; padding:22px 26px; display:flex; align-items:center; justify-content:space-between; gap:18px; }
.sheet summary::-webkit-details-marker{ display:none; }
.sheet-title{ display:flex; align-items:baseline; gap:16px; }
.sheet-title .code{ font-family:var(--font-mono); font-size:12.5px; color:var(--amber); letter-spacing:0.08em; }
.sheet-title h3{ font-size:19px; color:var(--navy-deep); text-transform:uppercase; }
.sheet-plus{ width:26px; height:26px; border:1px solid var(--line); border-radius:50%; display:flex; align-items:center; justify-content:center; flex:none; position:relative; }
.sheet-plus::before, .sheet-plus::after{ content:""; position:absolute; background:var(--navy-deep); }
.sheet-plus::before{ width:10px; height:2px; }
.sheet-plus::after{ width:2px; height:10px; }
.sheet[open] .sheet-plus::after{ display:none; }
.sheet-body{ padding:0 26px 26px 26px; display:grid; grid-template-columns:1fr 1fr; gap:24px; }
.sheet-body .photo{ height:100%; min-height:160px; }
.sheet-body ul{ margin:0; padding-left:0; list-style:none; }
.sheet-body li{ font-size:14.5px; color:var(--slate); padding:8px 0 8px 18px; position:relative; border-top:1px solid var(--line); }
.sheet-body li::before{ content:""; position:absolute; left:0; top:16px; width:8px; height:1px; background:var(--amber); }
@media (max-width:760px){ .sheet-body{ grid-template-columns:1fr; } .sheet-body .photo{ height:180px; order:-1; } .sheet-title h3{ font-size:16px; } }

/* ============ GALLERY STRIP ============ */
.gallery-strip{ display:grid; grid-template-columns:repeat(4,1fr); gap:14px; }
.gallery-strip .photo{ height:190px; }
.gallery-strip .photo:nth-child(1){ grid-column:span 2; grid-row:span 2; height:100%; }
@media (max-width:860px){ .gallery-strip{ grid-template-columns:repeat(2,1fr); } .gallery-strip .photo:nth-child(1){ grid-column:span 2; height:220px; } }
@media (max-width:520px){ .gallery-strip{ grid-template-columns:1fr; } .gallery-strip .photo:nth-child(1){ grid-column:span 1; height:200px; } }

/* ============ QHSE ============ */
.qhse-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:1px; background:var(--line-light); border:1px solid var(--line-light); }
.qhse-cell{ background:var(--navy); padding:32px 26px; }
.qhse-cell .sheet-tag{ margin-bottom:10px; }
.qhse-cell h3{ color:#fff; font-size:18px; margin-bottom:10px; text-transform:uppercase; }
.qhse-cell p{ color:#B9C6D3; font-size:14.5px; margin-bottom:0; }
@media (max-width:780px){ .qhse-grid{ grid-template-columns:1fr; } }

/* ============ CONTACT ============ */
.contact-grid{ display:grid; grid-template-columns:0.95fr 1.05fr; gap:56px; }
.contact-list{ display:grid; gap:22px; }
.contact-item{ display:flex; gap:16px; align-items:flex-start; padding-bottom:20px; border-bottom:1px solid var(--line); }
.contact-item:last-child{ border-bottom:none; }
.contact-icon{
  width:38px; height:38px; border:1px solid var(--line); flex:none;
  display:flex; align-items:center; justify-content:center; color:var(--amber);
  font-family:var(--font-mono); font-size:13px;
}
.contact-item h4{ font-size:13px; text-transform:uppercase; letter-spacing:0.08em; color:var(--navy-deep); margin-bottom:6px; }
.contact-item div{ font-size:15px; color:var(--slate); }
.contact-item a{ text-decoration:none; color:var(--slate); }
.contact-item a:hover{ color:var(--amber); }

.contact-panel{ background:var(--panel); border:1px solid var(--line); padding:32px; }
.contact-panel h3{ color:var(--navy-deep); font-size:18px; text-transform:uppercase; margin-bottom:6px; }
.contact-panel p{ font-size:14px; }
.qr-box{ display:flex; align-items:center; gap:18px; margin-top:18px; padding-top:22px; border-top:1px solid var(--line); }
.qr-box img{ width:96px; height:96px; border:1px solid var(--line); padding:6px; background:#fff; }
.qr-box div{ font-size:13.5px; color:var(--slate); }

form.enquiry{ margin-top:22px; display:grid; gap:14px; }
form.enquiry label{ font-family:var(--font-mono); font-size:11px; letter-spacing:0.08em; text-transform:uppercase; color:var(--slate); display:block; margin-bottom:6px; }
form.enquiry input, form.enquiry textarea, form.enquiry select{
  width:100%; border:1px solid var(--line); background:var(--paper); padding:11px 13px;
  font-family:var(--font-body); font-size:14.5px; color:var(--ink); border-radius:2px;
}
form.enquiry textarea{ min-height:100px; resize:vertical; }
form.enquiry input:focus, form.enquiry textarea:focus, form.enquiry select:focus{ outline:2px solid var(--amber); outline-offset:1px; }
.form-note{ font-size:12.5px; color:var(--slate); margin-top:2px; }

.office-photo{ height:340px; margin-bottom:48px; }

/* ============ CTA BAND ============ */
.cta-band{ background:var(--navy-deep); color:#fff; padding:64px 0; position:relative; overflow:hidden; }
.cta-band .container{ display:flex; align-items:center; justify-content:space-between; gap:32px; flex-wrap:wrap; position:relative; z-index:1; }
.cta-band h2{ color:#fff; font-size:clamp(22px,3vw,30px); text-transform:uppercase; max-width:520px; }
.cta-band p{ color:#AEBBC8; margin-top:10px; margin-bottom:0; }

/* ============ FOOTER ============ */
footer{ background:var(--navy-deep); color:#B9C6D3; padding:56px 0 0; }
.footer-grid{ display:grid; grid-template-columns:1.3fr 1fr 1fr; gap:40px; padding-bottom:44px; border-bottom:1px solid var(--line-light); }
.footer-brand{ display:flex; align-items:center; gap:12px; margin-bottom:16px; }
.footer-brand .brand-mark{ height:40px; }
.footer-brand strong{ color:#fff; font-family:var(--font-display); font-size:15px; }
footer h4{ color:#fff; font-size:12.5px; letter-spacing:0.1em; text-transform:uppercase; margin-bottom:16px; font-family:var(--font-mono); font-weight:500; }
footer ul{ list-style:none; margin:0; padding:0; display:grid; gap:10px; }
footer a{ text-decoration:none; color:#B9C6D3; font-size:14px; }
footer a:hover{ color:var(--amber-light); }
.footer-bottom{ display:flex; align-items:center; justify-content:space-between; gap:16px; padding:22px 0; font-size:13px; color:#7E8FA0; flex-wrap:wrap; }
.footer-bottom .managed-by{ font-family:var(--font-mono); font-size:12px; letter-spacing:0.03em; color:#7E8FA0; }
.footer-bottom .managed-by strong{ color:#B9C6D3; font-weight:500; }
@media (max-width:780px){ .footer-grid{ grid-template-columns:1fr; } .contact-grid, .about-grid{ grid-template-columns:1fr; } }