:root{
  --bg:#ffffff;--bg-elev:#f7f8fa;--text:#111827;--muted:#6b7280;--brand:#2563eb;--brand-2:#7c3aed;--card:#ffffff;--border:#e5e7eb;--ok:#0ea5e9;--warn:#d97706;--danger:#dc2626
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,"Helvetica Neue",Arial,"Apple Color Emoji","Segoe UI Emoji";color:var(--text);background:#ffffff;}

.container{width:min(1160px,92%);margin-inline:auto}

/* Header */
.site-header{position:sticky;top:0;background:rgba(255,255,255,.9);backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:14px 0}
.logo{color:#fff;text-decoration:none;font-weight:700;letter-spacing:.2px}
.logo-link{display:inline-flex;align-items:center;gap:8px}
.logo-img{height:42px;width:auto;display:block}
.site-title{margin:0 12px 0 12px;font-size:16px;line-height:1.25;font-weight:600;flex:1;color:#fff}
@media (max-width: 820px){
  .site-title{font-size:14px}
  .logo-img{height:36px}
}
.site-nav ul{list-style:none;margin:0;padding:0;display:flex;gap:16px}
.site-nav a{color:var(--text);text-decoration:none;padding:8px 10px;border-radius:8px}
.site-nav a:hover{background:rgba(37,99,235,.08)}
.nav-toggle{display:none;background:none;border:1px solid var(--border);color:var(--text);border-radius:8px;padding:6px 10px}

@media (max-width: 820px){
  .nav-toggle{display:inline-block}
  .site-nav{position:absolute;inset:60px 0 auto 0;padding:12px 4%;}
  .site-nav ul{flex-direction:column;background:var(--bg-elev);border:1px solid var(--border);border-radius:12px;padding:8px;display:none}
  .site-nav.open ul{display:flex}
}

/* Hero */
.hero{position:relative;overflow:hidden}
.hero-inner{padding:64px 0 40px}
.hero h1{font-size:clamp(28px,4vw,44px);margin:0 0 8px}
.lead{color:var(--muted);font-size:clamp(16px,2.2vw,18px);margin:0 0 18px}
.cta-row{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 14px;border-radius:10px;border:1px solid var(--border);color:#0f172a;text-decoration:none;background:#f8fafc}
.btn:hover{border-color:#cbd5e1;background:#f1f5f9}
.btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-2));border-color:transparent;color:#ffffff;font-weight:600}
.btn-ghost{background:transparent}
.hero-bg{display:none}

/* Sections */
.video-overview{padding:48px 0}
.video-overview h2{margin:0 0 24px;font-size:clamp(24px,3vw,32px)}
.video-wrapper{position:relative;width:100%;padding-bottom:56.25%;height:0;overflow:hidden;border-radius:12px;background:#000}
.video-wrapper:not(:last-child){margin-bottom:32px}
.video-wrapper video{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:contain;border:0}
.about{padding:36px 0}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:24px}
@media (max-width: 900px){.grid-2{grid-template-columns:1fr}}
.feature-list{margin:0;padding-left:18px;color:var(--muted)}

.highlights{padding:18px 0 48px}
.cards-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
@media (max-width: 900px){.cards-3{grid-template-columns:1fr}}
.card{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:16px}
.card h3{margin-top:0}

/* Page header */
.page .page-header{padding:28px 0 14px;border-bottom:1px solid var(--border)}
.page .page-header h1{margin:0 0 6px}

/* Modules */
.modules-list{padding:22px 0 42px}
.module-cards{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:0;padding-left:20px}
@media (max-width: 900px){.module-cards{grid-template-columns:1fr}}
.module-card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:14px}
.module-card h3{margin:0 0 6px}
.module-download-link{margin-top:12px;margin-bottom:0}
.module-download-link a{color:var(--text);text-decoration:none}
.module-download-link a:hover{text-decoration:underline}

/* Docs */
.docs-section{padding:24px 0 40px}
.panel{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:16px}
.muted{color:var(--muted)}
.small{font-size:12px}
.file-list{margin:10px 0 0;padding-left:18px;color:var(--muted)}
.url-input-row{display:flex;gap:8px;margin:8px 0}
.url-input-row input{flex:1;padding:10px 12px;border-radius:10px;border:1px solid var(--border);background:#101632;color:var(--text)}
.viewer-wrap{margin-top:16px}
.viewer-toolbar{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}
.viewer{height:70vh;background:#ffffff;border:1px solid var(--border);border-radius:12px;overflow:hidden}
.viewer iframe{width:100%;height:100%;border:0;background:#ffffff}

/* Footer */
.site-footer{border-top:1px solid var(--border);margin-top:24px;background:#ffffff}
.footer-inner{display:flex;gap:18px;justify-content:space-between;align-items:flex-start;padding:18px 0}
.footer-links ul{list-style:none;margin:8px 0 0;padding:0}
.footer-links a{color:var(--text);text-decoration:none}
.footer-links a:hover{text-decoration:underline}
.footer-copy{padding:8px 0 24px;color:var(--muted)}

/* Utilities */
.hidden{display:none}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}

.logo-img {
  height: 60px;
  transition: transform 0.3s ease;
}

.logo-img:hover {
  transform: scale(1.05);
}

.site-title {
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  margin: 0;
  max-width: 650px;
}
.header-inner{display:flex;align-items:center;gap:20px;flex-wrap:wrap;justify-content:space-between}
.logo-img{height:60px;transition:transform .2s;filter:brightness(1.35) contrast(1.1)}
.logo-img:hover{transform:scale(1.04)}
.site-title{color:#fff;font-size:1rem;margin:0;max-width:650px;font-weight:600}