/* Reset and variables */
* { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bg: #f7f9fb;
  --card: #ffffff;
  --text: #0f1724;
  --muted: #556077;
  --accent: #1266f1;
  --accent-600: #0b57d0;
  --particle: rgba(18,102,241,0.10);
  --particle-line: rgba(18,102,241,0.06);
  --radius: 10px;
  --container: 1100px;
}
html,body{height:100%;}
body {
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
.container{max-width:var(--container);margin:0 auto;padding:0 20px;}

/* Smooth scrolling */
html { scroll-behavior: smooth; }

/* Futuristic accent touches */
.brand-title{letter-spacing:0.6px;text-shadow:0 6px 18px rgba(18,102,241,0.12)}
.header-logo{filter: drop-shadow(0 6px 24px rgba(18,102,241,0.12));}

/* Header */
.site-header{background:transparent;padding:18px 0;}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:inherit}
.header-logo{height:56px;width:56px;border-radius:8px;object-fit:cover;box-shadow:0 6px 18px rgba(18,102,241,0.12)}
.brand-title{font-family:'Poppins',sans-serif;font-weight:700;font-size:20px;margin:0}
.brand-sub{font-size:13px;color:var(--muted);margin:0}

.nav-toggle{display:none;background:transparent;border:1px solid rgba(15,23,36,0.06);padding:8px 12px;border-radius:8px;cursor:pointer}

.site-nav ul{list-style:none;display:flex;gap:18px;align-items:center}
.site-nav a{text-decoration:none;color:var(--text);font-weight:600;padding:8px 10px;border-radius:8px;transition:background .15s,color .15s}
.site-nav a:hover{background:rgba(18,102,241,0.08);color:var(--accent-600)}

/* Hero */
.hero{padding:56px 0}
.hero-content{max-width:640px}
.hero h2{font-family:'Poppins',sans-serif;font-size:34px;margin-bottom:12px}
.hero p{color:var(--muted);margin-bottom:18px}
.btn-primary{display:inline-block;background:var(--accent);color:#fff;padding:12px 18px;border-radius:8px;text-decoration:none;font-weight:600}
.btn-primary:hover{background:var(--accent-600)}


.hero-visual{height:220px;border-radius:16px;background:linear-gradient(135deg,rgba(18,102,241,0.06), rgba(76,201,240,0.03));box-shadow:0 10px 40px rgba(16,24,40,0.06);display:flex;align-items:center;justify-content:center;padding:10px;overflow:visible}

/* Hero animated gradient / float */
.hero-visual{position:relative;overflow:visible}
.hero-visual::before{content:"";position:absolute;inset:0;border-radius:16px;background:linear-gradient(120deg, rgba(18,102,241,0.08), rgba(76,201,240,0.04));mix-blend-mode:overlay;pointer-events:none;animation:slideBG 9s linear infinite}
@keyframes slideBG{0%{transform:translateX(-10%)}50%{transform:translateX(10%)}100%{transform:translateX(-10%)}}
.hero-visual{animation:float 6s ease-in-out infinite}
@keyframes float{0%{transform:translateY(0)}50%{transform:translateY(-6px)}100%{transform:translateY(0)}}

.hero-svg{width:100%;height:100%;max-width:520px;max-height:200px}
.hero-svg .node{filter:drop-shadow(0 8px 20px rgba(18,102,241,0.08));transition:transform .36s ease}
.hero-svg line{stroke-opacity:0.9;transition:stroke-opacity .3s}
.hero-visual:hover .hero-svg .node{transform:translateY(-4px) scale(1.04)}

/* Services */
.services{padding:40px 0}
.services h3{font-size:22px;margin-bottom:18px}
.services-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px}
.card{background:var(--card);padding:18px;border-radius:var(--radius);box-shadow:0 6px 20px rgba(16,24,40,0.06)}
.card{transition:transform .36s cubic-bezier(.2,.9,.2,1),box-shadow .36s}
.card:hover{transform:translateY(-8px) rotate(-0.3deg);box-shadow:0 20px 50px rgba(12,32,120,0.12)}
.card h4{margin-bottom:8px;font-size:16px}
.card p{color:var(--muted);font-size:14px}

/* Service card layout */
.service-card{display:flex;gap:14px;align-items:flex-start;padding:14px}
.service-icon{width:56px;height:56px;object-fit:contain;border-radius:8px;background:linear-gradient(180deg,rgba(255,255,255,0.02),rgba(0,0,0,0.02));box-shadow:0 8px 20px rgba(12,32,120,0.06)}
.service-body h4{margin:0 0 6px 0;font-size:16px}
.service-body p{margin:0;color:var(--muted);font-size:13px}
.service-card:hover{transform:translateY(-6px);box-shadow:0 26px 60px rgba(12,32,120,0.10)}

/* Case study extra styles */
.case-tech{color:var(--muted);font-size:14px;margin-top:8px}
.case-impact{font-size:14px;margin-top:6px}

/* Technologies */
.technologies{padding:32px 0}
.tech-logos{display:flex;flex-wrap:wrap;gap:18px;align-items:center}
.tech-logos img{height:40px;opacity:.95;transition:transform .28s,filter .28s}
.tech-logos img:hover{transform:translateY(-6px) scale(1.06);filter:drop-shadow(0 8px 24px rgba(18,102,241,0.12))}

/* About / Case studies / Contact */
section{padding:32px 0}
.case-study{background:var(--card);padding:16px;border-radius:8px;box-shadow:0 6px 18px rgba(16,24,40,0.04);margin-bottom:12px;min-height:160px}
.case-study h4{margin-bottom:6px}

/* Case study thumbnail + content layout */
.case-study{display:flex;gap:16px;align-items:stretch}
.case-thumb{flex:0 0 88px}
.case-content{flex:1;display:flex;flex-direction:column;justify-content:space-between}
.case-study .case-thumb svg{display:block}

@media (max-width:720px){
  .case-study{flex-direction:column;min-height:auto}
  .case-thumb{flex:0 0 auto;align-self:center}
}

/* Contact form */
.contact-form{max-width:720px;margin:18px auto;padding:20px;background:var(--card);border-radius:12px;box-shadow:0 10px 30px rgba(16,24,40,0.06)}
.form-group{margin-bottom:14px}
.form-group label{display:block;font-weight:600;margin-bottom:8px;color:var(--text)}
.form-group input,.form-group textarea{width:100%;padding:10px;border:1px solid #e6eef8;border-radius:8px;background:#fff}
.form-button{display:inline-block;background:var(--accent);color:white;padding:10px 18px;border-radius:8px;border:none;cursor:pointer}
.form-button:hover{background:var(--accent-600)}

/* Footer */
.site-footer{background:transparent;padding:24px 0;color:var(--muted)}

/* Reveal on scroll */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .7s cubic-bezier(.2,.9,.2,1),transform .7s cubic-bezier(.2,.9,.2,1)}
.reveal.show{opacity:1;transform:none}

/* Small glow effect for primary button */
.btn-primary{box-shadow:0 8px 30px rgba(18,102,241,0.12)}
.btn-primary:hover{box-shadow:0 18px 60px rgba(18,102,241,0.18)}

/* Theme toggle styling */
.theme-toggle{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid rgba(15,23,36,0.06);background:transparent;padding:8px 10px;border-radius:8px;cursor:pointer;font-size:16px}
.theme-toggle[aria-pressed="true"]{background:linear-gradient(90deg, rgba(255,255,255,0.04), rgba(255,255,255,0.02));box-shadow:0 6px 22px rgba(18,102,241,0.06)}

/* Dark theme overrides */
body.theme-dark{
  --bg: #071023;
  --card: #0d1722;
  --text: #e6eef8;
  --muted: #9aa7bf;
  --accent: #4cc9f0;
  --accent-600: #28a7d9;
  --particle: rgba(76,201,240,0.12);
  --particle-line: rgba(76,201,240,0.08);
  background: #071023;
  color: var(--text);
}

/* Particles canvas styling */
.particles-canvas{position:fixed;inset:0;width:100%;height:100%;pointer-events:none;z-index:0;opacity:0.9;mix-blend-mode:screen}

/* Ensure main content sits above the canvas */
header, section, footer, .site-nav, .contact-form, .card{position:relative;z-index:1}

/* Smooth transition when switching themes */
body, .card, .site-nav, .contact-form, .hero-visual{transition:background-color .36s ease,color .36s ease,box-shadow .36s ease,transform .36s ease}

/* Theme toggle visibility tweaks for small screens */
@media (max-width:860px){
  .header-inner{gap:8px}
  .theme-toggle{order:2}
}

/* Responsive */
@media (max-width: 860px){
  .nav-toggle{display:block}
  .site-nav{position:absolute;top:84px;right:20px;background:var(--card);border-radius:10px;padding:12px;box-shadow:0 14px 40px rgba(16,24,40,0.12);display:none}
  .site-nav.open{display:block}
  .site-nav ul{flex-direction:column;gap:8px}
}

@media (max-width: 520px){
  .hero h2{font-size:24px}
  .header-inner{align-items:flex-start}
}