/* ===========================================================
   Helios Contract — clean static rebuild
   =========================================================== */
:root{
  --black:#1a1a1a;
  --ink:#3a3a3a;
  --muted:#8a8a8a;
  --line:#e2e2e2;
  --bg:#ffffff;
  --bg-alt:#f7f7f5;
  --dark:#1d1d1d;
  --accent:#1a1a1a;
  --maxw:1140px;
  --font-head:'Raleway',sans-serif;
  --font-body:'Open Sans',sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-body);
  color:var(--ink);
  background:var(--bg);
  line-height:1.75;
  font-size:15px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* ---------- Header ---------- */
#site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  transition:background .3s ease, box-shadow .3s ease, padding .3s ease;
  padding:22px 0;
}
#site-header.scrolled{
  background:rgba(255,255,255,.97);
  box-shadow:0 1px 14px rgba(0,0,0,.08);
  padding:12px 0;
}
.header-inner{display:flex;align-items:center;justify-content:space-between}
.logo{
  display:inline-flex;
  align-items:center;
  font-family:var(--font-head);
  font-weight:700;
  font-size:26px;
  letter-spacing:4px;
  color:#fff;
  transition:color .3s;
}
.logo-img{height:46px;width:auto;display:none}
#site-header.scrolled .logo-text{display:none}
#site-header.scrolled .logo-img{display:block}
#main-nav ul{display:flex;gap:30px;margin:0;padding:0;list-style:none}
#main-nav a{
  font-family:var(--font-head);
  font-size:12px;
  font-weight:600;
  letter-spacing:1.5px;
  text-transform:uppercase;
  color:#fff;
  padding:6px 0;
  position:relative;
  transition:color .25s;
}
#main-nav a::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;
  background:currentColor;transition:width .25s;
}
#main-nav a:hover::after,#main-nav a.active::after{width:100%}
#site-header.scrolled #main-nav a{color:var(--black)}
.nav-close{display:none}
.nav-toggle{
  display:none;background:none;border:0;cursor:pointer;
  flex-direction:column;gap:5px;padding:6px;
}
.nav-toggle span{display:block;width:26px;height:2px;background:#fff;transition:.3s}
#site-header.scrolled .nav-toggle span{background:var(--black)}

/* ---------- Hero ---------- */
.hero{position:relative;height:100vh;min-height:560px;overflow:hidden;background:#111}
.slides{position:absolute;inset:0}
.slide{
  position:absolute;inset:0;
  background-size:cover;background-position:center;
  opacity:0;transition:opacity 1.1s ease;
  display:flex;align-items:center;justify-content:center;
}
.slide::before{content:"";position:absolute;inset:0;background:rgba(0,0,0,.35)}
.slide.is-active{opacity:1}
.slide-caption{position:relative;text-align:center;color:#fff;padding:0 20px;max-width:900px}
.slide-caption h2{
  font-family:var(--font-head);
  font-size:clamp(42px,8vw,86px);
  font-weight:700;
  text-transform:uppercase;
  letter-spacing:6px;
  margin:0 0 18px;
  line-height:1;
}
.slide-caption h2::after{
  content:"";display:block;width:70px;height:3px;background:#fff;
  margin:22px auto 0;
}
.slide-caption p{
  font-family:var(--font-head);
  font-size:clamp(14px,2.2vw,19px);
  font-weight:300;letter-spacing:1px;margin:0;
}
.hero-arrow{
  position:absolute;top:50%;transform:translateY(-50%);
  width:54px;height:54px;border-radius:50%;
  border:1px solid rgba(255,255,255,.7);background:transparent;
  color:#fff;font-size:20px;cursor:pointer;z-index:5;
  transition:background .25s,color .25s;
}
.hero-arrow:hover{background:#fff;color:#111}
.hero-arrow.prev{left:28px}
.hero-arrow.next{right:28px}
.hero-dots{position:absolute;bottom:28px;left:0;right:0;display:flex;justify-content:center;gap:11px;z-index:5}
.hero-dots button{
  width:10px;height:10px;border-radius:50%;padding:0;cursor:pointer;
  border:1px solid #fff;background:transparent;transition:background .25s;
}
.hero-dots button.active{background:#fff}

/* ---------- Sections ---------- */
.section{padding:96px 0}
.section-alt{background:var(--bg-alt)}
.section-dark{background:var(--dark);color:#cfcfcf}
.section-title{
  font-family:var(--font-head);
  text-align:center;
  font-size:clamp(28px,4vw,40px);
  font-weight:700;
  letter-spacing:4px;
  text-transform:uppercase;
  color:var(--black);
  margin:0 0 14px;
}
.section-title::after{content:"";display:block;width:64px;height:3px;background:var(--black);margin:20px auto 0}
.section-title.light{color:#fff}
.section-title.light::after{background:#fff}
.section-lead{
  text-align:center;max-width:760px;margin:0 auto 56px;
  text-transform:uppercase;letter-spacing:1px;font-size:14px;color:var(--muted);
}
.rule{display:block;width:46px;height:2px;background:var(--black);margin:14px 0 22px}
.section-dark .rule{background:#fff}

/* ---------- About ---------- */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;margin-top:50px;align-items:start}
.about-media{display:flex;flex-direction:column;gap:22px;border:1px solid var(--line);padding:22px}
.about-media figure{margin:0;text-align:center}
.about-media img{width:100%}
.about-media figcaption{font-size:12px;color:var(--muted);margin-top:8px;font-style:italic}
.about-text h3{
  font-family:var(--font-head);text-transform:uppercase;letter-spacing:3px;
  font-size:18px;color:var(--black);margin:0;text-align:center;
}
.about-text .rule{margin:16px auto 24px}
.about-tagline{font-style:italic;color:var(--black)}

/* ---------- Skills ---------- */
.skills-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:40px}
.skill{text-align:center}
.skill img{width:100%;height:200px;object-fit:cover;margin-bottom:22px}
.skill h3{
  font-family:var(--font-head);text-transform:uppercase;letter-spacing:2px;
  font-size:16px;color:var(--black);margin:0 0 14px;
}

/* ---------- Projects ---------- */
.projects-grid{display:grid;grid-template-columns:1fr 1fr;gap:34px;margin-top:50px}
.project{border:1px solid var(--line);background:#fff}
.project-media{
  height:320px;background-size:cover;background-position:center;position:relative;
  display:flex;align-items:center;justify-content:center;
}
.project-media::before{content:"";position:absolute;inset:0;background:rgba(0,0,0,0);transition:background .3s}
.project:hover .project-media::before{background:rgba(0,0,0,.45)}
.project-link{
  position:relative;z-index:2;opacity:0;transition:opacity .3s;
  font-family:var(--font-head);text-transform:uppercase;letter-spacing:2px;
  font-size:13px;color:#fff;border:1px solid #fff;padding:12px 26px;
}
.project:hover .project-link{opacity:1}
.project-body{padding:24px}
.project-body h3{font-family:var(--font-head);font-size:18px;color:var(--black);margin:0 0 8px;font-weight:600}
.project-cat{font-size:12px;text-transform:uppercase;letter-spacing:1px;color:var(--muted)}

/* ---------- Gallery ---------- */
.gallery-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:8px}
.gallery-grid a{display:block;overflow:hidden;position:relative;aspect-ratio:4/3}
.gallery-grid img{width:100%;height:100%;object-fit:cover;transition:transform .4s, filter .4s;filter:grayscale(20%)}
.gallery-grid a:hover img{transform:scale(1.08);filter:grayscale(0)}

/* ---------- Partners ---------- */
.partners-grid{
  list-style:none;margin:48px 0 0;padding:0;
  display:grid;grid-template-columns:repeat(5,1fr);gap:22px;
}
.partner{
  display:flex;flex-direction:column;align-items:center;justify-content:space-between;
  gap:16px;padding:26px 18px;border:1px solid var(--line);background:#fff;
  transition:box-shadow .3s, transform .3s, border-color .3s;
}
.partner:hover{box-shadow:0 10px 26px rgba(0,0,0,.08);transform:translateY(-4px);border-color:#d4d4d4}
.partner img{
  max-height:56px;max-width:100%;width:auto;object-fit:contain;
  filter:grayscale(100%);opacity:.6;transition:.3s;
}
.partner:hover img{filter:grayscale(0);opacity:1}
.partner span{
  font-family:var(--font-head);font-size:12px;letter-spacing:1px;text-transform:uppercase;
  color:var(--muted);text-align:center;transition:color .3s;
}
.partner:hover span{color:var(--black)}

/* ---------- Social icons ---------- */
.social{display:flex;justify-content:center;gap:14px;margin:4px 0 22px}
.social-link{
  width:40px;height:40px;border-radius:50%;
  display:inline-flex;align-items:center;justify-content:center;
  color:#cfcfcf;border:1px solid rgba(255,255,255,.22);
  transition:background .25s, color .25s, border-color .25s, transform .25s;
}
.social-link:hover{background:#fff;color:#141414;border-color:#fff;transform:translateY(-2px)}

/* ---------- Contacts ---------- */
.contacts-grid{display:grid;grid-template-columns:1fr 1fr 1.4fr;gap:40px;margin-top:50px}
.contact-block h3{font-family:var(--font-head);text-transform:uppercase;letter-spacing:2px;font-size:15px;color:#fff;margin:0}
.contact-block p{margin:0 0 16px}
.contact-block a{color:#fff;border-bottom:1px solid rgba(255,255,255,.4)}
.contact-map iframe{width:100%;height:100%;min-height:280px;border:0;filter:grayscale(60%)}

/* ---------- Footer ---------- */
#site-footer{background:#141414;color:#9a9a9a;padding:40px 0;text-align:center}
.footer-nav{display:flex;flex-wrap:wrap;justify-content:center;gap:26px;margin-bottom:18px}
.footer-nav a{
  font-family:var(--font-head);text-transform:uppercase;letter-spacing:1px;
  font-size:12px;color:#cfcfcf;transition:color .25s;
}
.footer-nav a:hover{color:#fff}
.copyright{font-size:12px;letter-spacing:.5px;margin:0}

/* ---------- Lightbox ---------- */
.lightbox{
  position:fixed;inset:0;z-index:200;background:rgba(0,0,0,.92);
  display:none;align-items:center;justify-content:center;
}
.lightbox.open{display:flex}
#lb-image{max-width:88%;max-height:85%;box-shadow:0 10px 40px rgba(0,0,0,.6)}
.lb-close{position:absolute;top:22px;right:30px;font-size:40px;color:#fff;background:none;border:0;cursor:pointer;line-height:1}
.lb-nav{
  position:absolute;top:50%;transform:translateY(-50%);
  width:56px;height:56px;border-radius:50%;border:1px solid rgba(255,255,255,.6);
  background:none;color:#fff;font-size:22px;cursor:pointer;transition:.25s;
}
.lb-nav:hover{background:#fff;color:#111}
.lb-prev{left:26px}.lb-next{right:26px}

/* ---------- Back to top ---------- */
.back-to-top{
  position:fixed;right:24px;bottom:24px;z-index:90;
  width:46px;height:46px;border-radius:50%;background:var(--black);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:20px;
  opacity:0;pointer-events:none;transition:opacity .3s;
}
.back-to-top.show{opacity:1;pointer-events:auto}

/* ---------- Project detail page ---------- */
body.project-page{background:#fff}
#site-header.solid{background:rgba(255,255,255,.97);box-shadow:0 1px 14px rgba(0,0,0,.08);position:fixed}
#site-header.solid .logo-text{display:none}
#site-header.solid .logo-img{display:block}
#site-header.solid #main-nav a{color:var(--black)}
#site-header.solid .nav-toggle span{background:var(--black)}
.project-hero{
  padding:150px 0 50px;text-align:center;border-bottom:1px solid var(--line);
}
.project-hero h1{
  font-family:var(--font-head);text-transform:uppercase;letter-spacing:3px;
  font-size:clamp(24px,4vw,38px);color:var(--black);margin:0;font-weight:700;
}
.project-hero h1::after{content:"";display:block;width:64px;height:3px;background:var(--black);margin:20px auto 0}
.project-detail{padding:60px 0 90px}
.project-detail-grid{display:grid;grid-template-columns:2fr 1fr;gap:50px;align-items:start}
.pd-gallery{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.pd-gallery a{display:block;overflow:hidden;aspect-ratio:4/3}
.pd-gallery a:first-child{grid-column:1 / -1;aspect-ratio:16/9}
.pd-gallery img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.pd-gallery a:hover img{transform:scale(1.05)}
.pd-body h2{font-family:var(--font-head);text-transform:uppercase;letter-spacing:2px;font-size:18px;color:var(--black);margin:36px 0 16px}
.pd-body h2:first-child{margin-top:0}
.pd-info{border:1px solid var(--line);padding:26px}
.pd-info dt{font-family:var(--font-head);text-transform:uppercase;letter-spacing:1px;font-size:12px;color:var(--muted);margin-top:14px}
.pd-info dt:first-child{margin-top:0}
.pd-info dd{margin:4px 0 0;color:var(--black)}
.pd-nav{display:flex;justify-content:space-between;gap:20px;margin-top:50px;padding-top:30px;border-top:1px solid var(--line)}
.pd-nav a{
  font-family:var(--font-head);text-transform:uppercase;letter-spacing:1px;font-size:12px;
  color:var(--black);display:inline-flex;align-items:center;gap:8px;
}
.pd-nav a:hover{color:var(--muted)}
.pd-nav a.disabled{visibility:hidden}
.pd-back{text-align:center;margin-top:10px}
.pd-back a{
  font-family:var(--font-head);text-transform:uppercase;letter-spacing:2px;font-size:12px;
  border:1px solid var(--black);padding:12px 28px;color:var(--black);transition:.25s;display:inline-block;
}
.pd-back a:hover{background:var(--black);color:#fff}
@media(max-width:860px){
  .project-detail-grid{grid-template-columns:1fr}
}

/* ---------- Responsive ---------- */
@media(max-width:960px){
  .about-grid,.skills-grid,.projects-grid{grid-template-columns:1fr}
  .skills-grid{gap:48px}
  .gallery-grid{grid-template-columns:repeat(3,1fr)}
  .partners-grid{grid-template-columns:repeat(3,1fr)}
  .contacts-grid{grid-template-columns:1fr}
  .contact-map iframe{min-height:260px}
}
@media(max-width:720px){
  .nav-toggle{display:flex}
  #main-nav{
    position:fixed;top:0;right:-100%;height:100vh;width:78%;max-width:320px;
    background:#fff;flex-direction:column;padding:80px 32px;
    box-shadow:-6px 0 30px rgba(0,0,0,.15);transition:right .3s ease;z-index:120;
  }
  #main-nav.open{right:0}
  #main-nav ul{flex-direction:column;gap:4px}
  #main-nav a,#site-header.scrolled #main-nav a{color:var(--black);display:block;padding:12px 0;border-bottom:1px solid var(--line)}
  .nav-close{display:block;position:absolute;top:18px;right:22px;font-size:34px;background:none;border:0;cursor:pointer;color:var(--black)}
  .gallery-grid{grid-template-columns:repeat(2,1fr)}
  .partners-grid{grid-template-columns:repeat(2,1fr)}
  .section{padding:68px 0}
}