:root{
  --bg:#f7f7fb;
  --card:#ffffff;
  --text:#111827;
  --muted:#6b7280;
  --accent:#2563eb;
  --radius:10px;
}

[data-theme="dark"]{
  --bg:#0b1220;
  --card:#071224;
  --text:#e6eef8;
  --muted:#9aa6b2;
  --accent:#60a5fa;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;font-family:Inter, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;
}

/* Headings: main headings use a light color for contrast over the dark background;
  smaller headings inherit theme text color. `.card h3` overrides for cards. */
h1,h2,h3{color:#e6eef8;line-height:1.15}
h4,h5,h6{color:var(--text);line-height:1.15}

/* Ensure paragraph and anchor text use the theme text color for contrast */
p, a, .nav-list a, .brand, .link-btn{color:var(--text)}

.container{max-width:1100px;margin:0 auto;padding:18px}

.site-header{background:transparent;position:sticky;top:0;z-index:10}
.site-header .container{display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:center;gap:10px;color:var(--text);text-decoration:none;font-weight:700}
.brand img{filter:drop-shadow(0 1px 0 rgba(0,0,0,.05))}

.nav-list{list-style:none;margin:0;padding:0;display:flex;gap:12px;align-items:center}
.nav-list a{color:var(--text);text-decoration:none}
.link-btn{background:none;border:0;color:var(--text);cursor:pointer}
.nav-toggle{display:none;background:none;border:0;font-size:20px}

.hero{padding:80px 0;text-align:left}
.hero h1{font-size:clamp(28px,5vw,44px);margin:0 0 12px}
.hero p{color:var(--muted);margin:0 0 18px}
.btn{background:var(--accent);color:white;padding:10px 16px;border-radius:8px;text-decoration:none;display:inline-block}

.features{padding:48px 0}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:18px}
.card{background:var(--card);padding:18px;border-radius:var(--radius);box-shadow:0 6px 18px rgba(2,6,23,0.06)}
.card h3{margin:0 0 6px;color:var(--text)}
.card p{margin:0;color:var(--muted)}

.gallery{padding:36px 0}
.gallery-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:12px}
.gallery-grid img{width:100%;height:140px;object-fit:cover;border-radius:8px}

.contact{padding:36px 0}
.contact form{display:grid;gap:12px}
.field{display:block}
.field input,.field textarea{width:100%;padding:10px;border-radius:8px;border:1px solid rgba(0,0,0,0.08);background:transparent;color:var(--text)}
.form-msg{margin-top:6px;color:var(--muted)}

.site-footer{padding:18px 0;color:var(--muted)}

@media (max-width:800px){
  .nav-list{position:absolute;right:16px;top:64px;background:var(--card);flex-direction:column;padding:10px;border-radius:8px;display:none;box-shadow:0 8px 30px rgba(2,6,23,0.08)}
  .nav-list.show{display:flex}
  .nav-toggle{display:block}
}

/* small utility */
.hidden{display:none}

/* Fullscreen tech background */
#bg{position:fixed;inset:0;z-index:-2;overflow:hidden;pointer-events:none}
#bg-canvas{position:absolute;inset:0;width:100%;height:100%;display:block}
.bg-overlay{position:absolute;inset:0;pointer-events:none;background:linear-gradient(180deg,rgba(6,11,26,0.18),rgba(6,11,26,0.06));mix-blend-mode:overlay}

/* fallback: use SVG as background image for browsers without canvas JS */
#bg{background-image:url("/assets/bg-tech.svg");background-size:cover;background-position:center center;background-repeat:no-repeat}

/* Make sure content sits above background */
header.site-header, main, .site-footer{position:relative;z-index:1}

/* Subtle vignette and noise for depth */
.bg-overlay::after{content:"";position:absolute;inset:0;background:radial-gradient(ellipse at center,rgba(0,0,0,0.05) 0%,rgba(0,0,0,0.2) 100%);opacity:0.9}

@media (prefers-reduced-motion:reduce){
  #bg-canvas{display:none}
}