/* ============================================================================
   BitsServer IT Lab — Static Site (Cloudflare Pages)
   Design system: electric blue / cyan / violet on near-black, glass surfaces,
   Orbitron display + Poppins body. Signature: real WebGL 3D hero scene
   (see js/hero-scene.js) instead of CSS-simulated depth.
   ============================================================================ */

:root{
  --c-primary:#0A84FF;
  --c-secondary:#00E5FF;
  --c-accent:#7B61FF;
  --c-bg:#050816;
  --c-bg-alt:#0A0F24;
  --c-text:#FFFFFF;
  --c-text-dim:#B8C0D9;
  --c-text-dim2:#8891AB;
  --glass-bg:rgba(255,255,255,0.05);
  --glass-border:rgba(255,255,255,0.12);
  --ease:cubic-bezier(.22,1,.36,1);
  --font-head:'Orbitron', sans-serif;
  --font-body:'Poppins', sans-serif;
}

*,*::before,*::after{ margin:0; padding:0; box-sizing:border-box; }
html{ scroll-behavior:smooth; }
html, body{ overflow-x:hidden; width:100%; }
body{
  background:var(--c-bg); color:var(--c-text); font-family:var(--font-body);
  line-height:1.6; position:relative; font-size:16px;
}
img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
ul{ list-style:none; }
button{ font-family:inherit; cursor:pointer; border:none; background:none; color:inherit; }
.container{ width:92%; max-width:1200px; margin:0 auto; }
h1,h2,h3{ font-family:var(--font-head); font-weight:700; letter-spacing:.4px; }
::selection{ background:var(--c-primary); color:#fff; }

/* Ambient background glow + grid, sits behind everything including the WebGL canvas */
body::before{
  content:''; position:fixed; inset:0;
  background:
    radial-gradient(circle at 12% 15%, rgba(123,97,255,.20), transparent 42%),
    radial-gradient(circle at 88% 8%, rgba(0,229,255,.16), transparent 45%),
    radial-gradient(circle at 50% 100%, rgba(10,132,255,.16), transparent 45%);
  z-index:-3; pointer-events:none;
}
body::after{
  content:''; position:fixed; inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px);
  background-size:42px 42px; z-index:-2; pointer-events:none;
  mask-image:radial-gradient(ellipse at center, black 0%, transparent 78%);
  -webkit-mask-image:radial-gradient(ellipse at center, black 0%, transparent 78%);
}

@keyframes fadeInUp{ from{ opacity:0; transform:translateY(26px); } to{ opacity:1; transform:translateY(0); } }
.anim{ opacity:0; animation:fadeInUp .9s var(--ease) forwards; }
.anim-d1{ animation-delay:.08s; } .anim-d2{ animation-delay:.18s; }
.anim-d3{ animation-delay:.28s; } .anim-d4{ animation-delay:.38s; }
/* No-JS fallback: if IntersectionObserver / JS fails, content still shows */
.no-js .anim, .anim.no-js{ opacity:1; animation:none; }

#scroll-progress{
  position:fixed; top:0; left:0; height:3px; width:0%;
  background:linear-gradient(90deg,var(--c-primary),var(--c-secondary),var(--c-accent));
  z-index:9998; box-shadow:0 0 10px var(--c-secondary); transition:width .1s linear;
}
#cursor-glow{
  position:fixed; width:26px; height:26px; border-radius:50%; pointer-events:none;
  background:radial-gradient(circle, rgba(0,229,255,.55), transparent 70%);
  transform:translate(-50%,-50%); z-index:9997; mix-blend-mode:screen; will-change:transform;
}
@media (max-width:900px){ #cursor-glow{ display:none; } }
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  .anim{ opacity:1; animation:none; }
  #cursor-glow{ display:none; }
}

.glass{
  background:var(--glass-bg); backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  border:1px solid var(--glass-border); border-radius:18px;
}
.neon-text{
  background:linear-gradient(90deg,var(--c-secondary),var(--c-primary),var(--c-accent));
  -webkit-background-clip:text; background-clip:text; color:transparent;
  background-size:200% auto; animation:gradientMove 6s linear infinite;
}
@keyframes gradientMove{ to{ background-position:200% center; } }

.btn{
  display:inline-flex; align-items:center; gap:8px; padding:15px 32px; border-radius:50px;
  font-weight:600; font-size:14px; letter-spacing:.5px;
  transition:transform .35s var(--ease), box-shadow .35s var(--ease);
}
.btn-primary{ background:linear-gradient(135deg,var(--c-primary),var(--c-accent)); color:#fff; box-shadow:0 0 24px rgba(10,132,255,.5); }
.btn-outline{ border:1px solid var(--c-secondary); color:var(--c-secondary); background:rgba(0,229,255,.05); }
.btn:hover{ transform:translateY(-3px) scale(1.03); box-shadow:0 10px 34px rgba(123,97,255,.55); }
.btn:focus-visible, a:focus-visible, button:focus-visible, input:focus-visible{
  outline:2px solid var(--c-secondary); outline-offset:3px; border-radius:6px;
}

/* ==========================================================================
   HEADER / NAV
   ========================================================================== */
#site-header{ position:fixed; top:0; left:0; width:100%; z-index:1000; padding:16px 0; transition:all .4s var(--ease); background:rgba(5,8,22,.55); backdrop-filter:blur(14px); border-bottom:1px solid rgba(255,255,255,.06); }
#site-header.scrolled{ padding:10px 0; background:rgba(5,8,22,.85); border-bottom:1px solid var(--glass-border); }
.nav-wrap{ display:flex; align-items:center; justify-content:space-between; gap:16px; }
.logo{ display:flex; align-items:center; gap:10px; font-family:var(--font-head); font-size:18px; font-weight:900; white-space:nowrap; }
.logo .logo-mark{
  width:34px; height:34px; border-radius:10px; flex-shrink:0;
  background:linear-gradient(135deg,var(--c-primary),var(--c-accent));
  display:flex; align-items:center; justify-content:center;
  box-shadow:0 0 18px rgba(10,132,255,.6); animation:pulseGlow 3s ease-in-out infinite;
}
@keyframes pulseGlow{ 0%,100%{ box-shadow:0 0 12px rgba(10,132,255,.5); } 50%{ box-shadow:0 0 26px rgba(0,229,255,.8); } }
.logo-mark svg{ width:18px; height:18px; stroke:#fff; }

#main-nav ul{ display:flex; gap:30px; align-items:center; }
#main-nav a{ font-size:14px; font-weight:500; color:var(--c-text-dim); transition:color .3s; position:relative; padding:4px 0; }
#main-nav a:hover, #main-nav a.active{ color:#fff; }
#main-nav a::after{ content:''; position:absolute; left:0; bottom:0; width:0; height:2px; background:linear-gradient(90deg,var(--c-secondary),var(--c-primary)); transition:width .3s var(--ease); }
#main-nav a:hover::after, #main-nav a.active::after{ width:100%; }

.nav-check{ display:none; }
.nav-burger{ display:none; flex-direction:column; gap:5px; width:26px; cursor:pointer; background:none; }
.nav-burger span{ height:2px; width:100%; background:#fff; border-radius:2px; transition:.3s; }

@media (max-width:860px){
  #main-nav{
    position:fixed; top:0; right:-100%; width:74%; max-width:320px; height:100vh;
    background:rgba(5,8,22,.98); backdrop-filter:blur(20px); border-left:1px solid var(--glass-border);
    transition:right .4s var(--ease); padding:110px 30px; overflow-y:auto; z-index:1001;
  }
  #main-nav ul{ flex-direction:column; align-items:flex-start; gap:24px; }
  .nav-check:checked ~ #main-nav{ right:0; }
  .nav-burger{ display:flex; z-index:1002; }
  .nav-check:checked ~ .nav-burger span:nth-child(1){ transform:translateY(7px) rotate(45deg); }
  .nav-check:checked ~ .nav-burger span:nth-child(2){ opacity:0; }
  .nav-check:checked ~ .nav-burger span:nth-child(3){ transform:translateY(-7px) rotate(-45deg); }
  .nav-cta{ display:none; }
}
@media (max-width:420px){
  .logo{ font-size:14px; gap:6px; }
  .logo .logo-mark{ width:28px; height:28px; }
}

/* ==========================================================================
   HERO — real WebGL 3D scene lives in <canvas id='hero-canvas'>
   ========================================================================== */
#hero{ min-height:100vh; display:flex; align-items:center; padding-top:100px; position:relative; }
#hero-canvas{ position:absolute; inset:0; width:100%; height:100%; z-index:1; }
#hero .container{ display:grid; grid-template-columns:1.05fr .95fr; gap:40px; align-items:center; position:relative; z-index:2; }
@media (max-width:960px){ #hero .container{ grid-template-columns:1fr; text-align:center; } }

.hero-eyebrow{ display:inline-flex; align-items:center; gap:8px; padding:9px 18px; border-radius:50px; font-size:12px; letter-spacing:1px; margin-bottom:22px; }
.hero-eyebrow .dot{ width:7px; height:7px; border-radius:50%; background:var(--c-secondary); box-shadow:0 0 8px var(--c-secondary); animation:blink 1.6s infinite; }
@keyframes blink{ 50%{ opacity:.3; } }

#hero h1{ font-size:clamp(28px,5.4vw,58px); line-height:1.14; margin-bottom:20px; }
#hero p.subtitle{ color:var(--c-text-dim); font-size:16px; max-width:560px; margin-bottom:32px; }
@media (max-width:960px){ #hero p.subtitle{ margin-left:auto; margin-right:auto; } }
.hero-btns{ display:flex; gap:16px; flex-wrap:wrap; margin-bottom:10px; }
@media (max-width:960px){ .hero-btns{ justify-content:center; } }

.hero-trust{ display:flex; gap:26px; margin-top:32px; flex-wrap:wrap; }
@media (max-width:960px){ .hero-trust{ justify-content:center; } }
.hero-trust div strong{ display:block; font-family:var(--font-head); font-size:22px; }
.hero-trust div span{ font-size:12px; color:var(--c-text-dim); }

.hero-scene-spacer{ height:460px; pointer-events:none; }
@media (max-width:960px){ .hero-scene-spacer{ height:340px; } }
@media (max-width:520px){ .hero-scene-spacer{ height:260px; } }

.scroll-cue{ position:absolute; bottom:22px; left:50%; transform:translateX(-50%); display:flex; flex-direction:column; align-items:center; gap:8px; z-index:3; font-size:11px; letter-spacing:2px; color:var(--c-text-dim); animation:bob 2.2s ease-in-out infinite; }
@keyframes bob{ 0%,100%{ transform:translate(-50%,0); } 50%{ transform:translate(-50%,8px); } }
.scroll-cue svg{ width:16px; height:16px; stroke:var(--c-secondary); }
@media (max-width:700px){ .scroll-cue{ display:none; } }

/* ==========================================================================
   SECTION SHARED
   ========================================================================== */
section{ position:relative; padding:90px 0; overflow:hidden; }
@media (max-width:760px){ section{ padding:60px 0; } }
@media (max-width:480px){ section{ padding:46px 0; } }
.section-head{ text-align:center; max-width:620px; margin:0 auto 50px; }
.section-tag{ font-size:12px; letter-spacing:3px; color:var(--c-secondary); text-transform:uppercase; display:block; margin-bottom:12px; }
.section-head h2{ font-size:clamp(24px,3.6vw,40px); margin-bottom:14px; }
.section-head p{ color:var(--c-text-dim); font-size:15px; }

/* ---------- Services ---------- */
.services-grid{ display:grid; grid-template-columns:repeat(auto-fit,minmax(230px,1fr)); gap:22px; perspective:1400px; }
.service-card{ padding:30px 26px; transition:transform .5s var(--ease), box-shadow .5s var(--ease); transform-style:preserve-3d; }
.service-card:hover{ transform:translateY(-8px) rotateX(5deg) rotateY(-5deg); box-shadow:0 20px 40px rgba(10,132,255,.25), 0 0 32px rgba(0,229,255,.15); border-color:rgba(0,229,255,.45); }
.service-icon{ width:52px; height:52px; border-radius:14px; margin-bottom:18px; background:linear-gradient(135deg,rgba(10,132,255,.25),rgba(123,97,255,.25)); display:flex; align-items:center; justify-content:center; box-shadow:0 0 18px rgba(10,132,255,.22) inset; transition:transform .5s var(--ease); }
.service-card:hover .service-icon{ transform:translateZ(24px) rotate(-6deg); }
.service-icon svg{ width:25px; height:25px; stroke:var(--c-secondary); }
.service-card h3{ font-size:17px; margin-bottom:8px; }
.service-card p{ color:var(--c-text-dim); font-size:13.5px; }

/* ---------- Highlights ---------- */
.highlights-grid{ display:grid; grid-template-columns:repeat(auto-fit,minmax(230px,1fr)); gap:24px; perspective:1400px; }
.highlight-card{ padding:32px 26px; text-align:center; transition:transform .5s var(--ease), box-shadow .5s var(--ease); transform-style:preserve-3d; }
.highlight-card:hover{ transform:translateY(-10px) rotateX(6deg) rotateY(-6deg); box-shadow:0 25px 50px rgba(10,132,255,.28), 0 0 40px rgba(0,229,255,.18); border-color:rgba(0,229,255,.5); }
.highlight-icon{ width:60px; height:60px; border-radius:16px; margin:0 auto 20px; background:linear-gradient(135deg,rgba(10,132,255,.25),rgba(123,97,255,.25)); display:flex; align-items:center; justify-content:center; box-shadow:0 0 20px rgba(10,132,255,.25) inset; transition:transform .5s var(--ease); }
.highlight-card:hover .highlight-icon{ transform:translateZ(30px) rotate(-8deg); }
.highlight-icon svg{ width:28px; height:28px; stroke:var(--c-secondary); }
.highlight-card h3{ font-size:17px; margin-bottom:10px; }
.highlight-card p{ color:var(--c-text-dim); font-size:14px; }

/* ---------- Stats ---------- */
.stats-grid{ display:grid; grid-template-columns:repeat(4,1fr); gap:22px; text-align:center; }
@media (max-width:760px){ .stats-grid{ grid-template-columns:repeat(2,1fr); } }
.stat-card{ padding:32px 16px; }
.stat-num{ font-family:var(--font-head); font-size:clamp(26px,4vw,42px); font-weight:900; }
.stat-label{ color:var(--c-text-dim); font-size:12.5px; margin-top:8px; letter-spacing:.5px; }

/* ---------- Tech stack marquee (CSS-only infinite loop, content duplicated in HTML) ---------- */
.tech-marquee{ overflow:hidden; position:relative; -webkit-mask-image:linear-gradient(90deg, transparent, black 8%, black 92%, transparent); mask-image:linear-gradient(90deg, transparent, black 8%, black 92%, transparent); }
.tech-track{ display:flex; gap:44px; width:max-content; animation:marquee 30s linear infinite; }
.tech-track:hover{ animation-play-state:paused; }
@keyframes marquee{ from{ transform:translateX(0); } to{ transform:translateX(-50%); } }
.tech-item{ display:flex; flex-direction:column; align-items:center; gap:10px; width:82px; opacity:.85; transition:.3s; }
.tech-item:hover{ opacity:1; transform:translateY(-6px); }
.tech-item .tech-icon{ width:50px; height:50px; border-radius:14px; display:flex; align-items:center; justify-content:center; }
.tech-item svg{ width:24px; height:24px; stroke:var(--c-secondary); }
.tech-item span{ font-size:11px; color:var(--c-text-dim); }

/* ---------- Process ---------- */
.process-list{ display:grid; gap:0; max-width:760px; margin:0 auto; }
.process-step{ display:grid; grid-template-columns:64px 1fr; gap:24px; padding:28px 0; border-bottom:1px solid var(--glass-border); }
.process-step:last-child{ border-bottom:none; }
.process-num{ font-family:var(--font-head); font-size:26px; font-weight:900; color:transparent; -webkit-text-stroke:1.5px var(--c-secondary); opacity:.6; }
.process-step h3{ font-size:17px; margin-bottom:8px; }
.process-step p{ color:var(--c-text-dim); font-size:14px; }

/* ---------- Testimonials — static grid, no JS/slider required ---------- */
.testi-grid{ display:grid; grid-template-columns:repeat(auto-fit,minmax(260px,1fr)); gap:24px; }
.testi-card{ padding:32px 28px; }
.testi-quote{ font-size:14.5px; color:var(--c-text-dim); font-style:italic; margin-bottom:20px; }
.testi-name{ font-weight:600; font-size:14px; }
.testi-role{ font-size:12px; color:var(--c-secondary); }

/* ---------- Contact ---------- */
.contact-grid{ display:grid; grid-template-columns:1fr 1fr; gap:30px; }
@media (max-width:860px){ .contact-grid{ grid-template-columns:1fr; } }
.contact-form{ padding:34px; }
@media (max-width:520px){ .contact-form, .contact-info{ padding:22px; } }
.form-row{ margin-bottom:18px; }
.form-row label{ display:block; font-size:12.5px; color:var(--c-text-dim); margin-bottom:8px; letter-spacing:.4px; }
.form-row input, .form-row textarea{
  width:100%; padding:13px 16px; border-radius:12px; border:1px solid var(--glass-border);
  background:rgba(255,255,255,.03); color:#fff; font-family:inherit; font-size:14px; transition:border-color .3s;
}
.form-row input:focus, .form-row textarea:focus{ outline:none; border-color:var(--c-secondary); }
.form-row textarea{ resize:vertical; min-height:120px; }
.form-note{ font-size:12px; color:var(--c-text-dim2); margin-top:14px; }
.contact-info{ padding:34px; display:flex; flex-direction:column; gap:22px; justify-content:center; }
.info-item{ display:flex; gap:14px; align-items:flex-start; }
.info-icon{ width:40px; height:40px; flex-shrink:0; border-radius:12px; display:flex; align-items:center; justify-content:center; background:linear-gradient(135deg, rgba(10,132,255,.25), rgba(123,97,255,.25)); }
.info-icon svg{ width:19px; height:19px; stroke:var(--c-secondary); }
.info-item strong{ display:block; margin-bottom:2px; font-size:14px; }
.info-item p, .info-item a{ color:var(--c-text-dim); font-size:13.5px; }
.social-row{ display:flex; gap:12px; margin-top:4px; }
.social-row a{ width:38px; height:38px; border-radius:50%; display:flex; align-items:center; justify-content:center; border:1px solid var(--glass-border); transition:.3s; }
.social-row a:hover{ background:var(--c-primary); box-shadow:0 0 16px var(--c-primary); transform:translateY(-4px); }
.social-row svg{ width:16px; height:16px; stroke:#fff; }

/* ---------- CTA banner ---------- */
#cta-banner{ padding:90px 0; }
@media (max-width:760px){ #cta-banner{ padding:56px 0; } }
.cta-box{ position:relative; text-align:center; padding:64px 30px; border-radius:26px; overflow:hidden; background:linear-gradient(135deg, rgba(10,132,255,.18), rgba(123,97,255,.18)); }
@media (max-width:600px){ .cta-box{ padding:42px 22px; } }
.cta-box::before{ content:''; position:absolute; inset:0; background:radial-gradient(circle at 20% 20%, rgba(0,229,255,.25), transparent 45%), radial-gradient(circle at 80% 80%, rgba(123,97,255,.25), transparent 45%); animation:ctaPulse 6s ease-in-out infinite; }
@keyframes ctaPulse{ 0%,100%{ opacity:.6; } 50%{ opacity:1; } }
.cta-box h2{ position:relative; z-index:1; font-size:clamp(22px,4vw,36px); margin-bottom:16px; }
.cta-box p{ position:relative; z-index:1; color:var(--c-text-dim); margin-bottom:30px; max-width:520px; margin-left:auto; margin-right:auto; }
.cta-box .hero-btns{ position:relative; z-index:1; justify-content:center; }

/* ---------- Footer ---------- */
#site-footer{ padding:50px 0 26px; border-top:1px solid var(--glass-border); }
.footer-grid{ display:grid; grid-template-columns:1.4fr 1fr 1fr 1fr; gap:32px; margin-bottom:36px; }
@media (max-width:860px){ .footer-grid{ grid-template-columns:1fr 1fr; } }
@media (max-width:480px){ .footer-grid{ grid-template-columns:1fr; } }
.footer-grid h4{ font-size:14px; margin-bottom:18px; }
.footer-grid p{ color:var(--c-text-dim); font-size:13.5px; margin-bottom:16px; }
.footer-grid ul li{ margin-bottom:11px; }
.footer-grid ul a{ color:var(--c-text-dim); font-size:13.5px; transition:.3s; }
.footer-grid ul a:hover{ color:var(--c-secondary); }
.footer-bottom{ display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:12px; padding-top:22px; border-top:1px solid var(--glass-border); font-size:12.5px; color:var(--c-text-dim); }

/* ---------- Back to top ---------- */
#back-to-top{ position:fixed; right:20px; bottom:20px; width:46px; height:46px; border-radius:50%; background:var(--glass-bg); backdrop-filter:blur(12px); border:1px solid var(--glass-border); display:flex; align-items:center; justify-content:center; opacity:0; visibility:hidden; transform:translateY(20px); transition:all .35s var(--ease); z-index:900; box-shadow:0 0 15px rgba(10,132,255,.3); }
#back-to-top.show{ opacity:1; visibility:visible; transform:translateY(0); }
#back-to-top:hover{ box-shadow:0 0 22px var(--c-secondary); transform:translateY(-4px); }
#back-to-top svg{ width:19px; height:19px; stroke:var(--c-secondary); }

/* ---------- Page banner (used by any inner page, e.g. 404) ---------- */
.page-banner{ padding:170px 0 50px; text-align:center; }
.page-banner h1{ font-size:clamp(26px,5vw,48px); margin-bottom:12px; }
.page-banner p{ color:var(--c-text-dim); }