/* Viper VR & Tech — site styles (no framework) */
:root {
  --bg: #05060c;
  --bg-2: #0a0c18;
  --surface: rgba(255, 255, 255, 0.04);
  --surface-2: rgba(255, 255, 255, 0.07);
  --border: rgba(255, 255, 255, 0.09);
  --border-strong: rgba(140, 160, 255, 0.28);
  --text: #eef0ff;
  --muted: #a3a8c3;
  --faint: #6f7491;
  --blue: #3d8bff;
  --cyan: #38d6ff;
  --purple: #8b5cf6;
  --violet: #b57bff;
  --grad: linear-gradient(120deg, var(--cyan) 0%, var(--blue) 40%, var(--purple) 75%, var(--violet) 100%);
  --radius: 18px;
  --max: 1160px;
  --font: ui-sans-serif, -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Inter, Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
body::before {
  content: "";
  position: fixed; inset: 0; z-index: -2; pointer-events: none;
  background:
    radial-gradient(900px 600px at 85% -10%, rgba(139, 92, 246, 0.18), transparent 60%),
    radial-gradient(800px 600px at -10% 20%, rgba(61, 139, 255, 0.14), transparent 60%),
    var(--bg);
}
body::after {
  content: "";
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse at 50% 0%, #000 0%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 0%, #000 0%, transparent 70%);
}

a { color: var(--cyan); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: #fff; }
:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; border-radius: 6px; }
img, svg { max-width: 100%; display: block; }
h1, h2, h3 { line-height: 1.12; letter-spacing: -0.025em; margin: 0 0 0.5em; }
h1 { font-size: clamp(2.4rem, 6vw, 4.6rem); font-weight: 750; }
h2 { font-size: clamp(1.7rem, 3.6vw, 2.6rem); font-weight: 700; }
h3 { font-size: 1.2rem; font-weight: 650; letter-spacing: -0.01em; }
p { margin: 0 0 1em; }
.muted { color: var(--muted); }
.grad-text {
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
}

.skip-link {
  position: absolute; left: 16px; top: -60px; z-index: 100;
  background: var(--text); color: var(--bg); padding: 10px 16px; border-radius: 10px; font-weight: 600;
}
.skip-link:focus { top: 12px; }

.container { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 24px; }
@media (max-width: 600px) { .container { padding: 0 16px; } }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(160%) blur(16px);
  -webkit-backdrop-filter: saturate(160%) blur(16px);
  background: rgba(5, 6, 12, 0.72);
  border-bottom: 1px solid var(--border);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 68px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 700; letter-spacing: -0.01em; font-size: 1.05rem; }
.brand:hover { color: var(--text); }
.brand svg { width: 30px; height: 30px; flex: none; }
.brand span b { font-weight: 700; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.nav-links { display: flex; align-items: center; gap: 4px; list-style: none; margin: 0; padding: 0; }
.nav-links a {
  display: block; padding: 8px 14px; border-radius: 999px;
  color: var(--muted); text-decoration: none; font-size: 0.95rem; font-weight: 500;
  transition: color .2s, background .2s;
}
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--text); background: var(--surface-2); }
.nav-toggle {
  display: none; background: var(--surface-2); color: var(--text);
  border: 1px solid var(--border); border-radius: 12px; width: 44px; height: 44px; cursor: pointer;
}
.nav-toggle svg { margin: auto; }
@media (max-width: 760px) {
  .nav-toggle { display: grid; place-items: center; }
  .nav-links {
    display: none; position: absolute; top: 68px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 2px;
    padding: 10px 16px 18px; background: #080912; box-shadow: 0 24px 40px rgba(0,0,0,.6);
    border-bottom: 1px solid var(--border);
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 14px; border-radius: 12px; font-size: 1rem; }
}

/* Buttons & badges */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 13px 22px; border-radius: 999px; font-weight: 600; font-size: 0.98rem;
  text-decoration: none; border: 1px solid transparent; transition: transform .2s, box-shadow .2s, background .2s;
}
.btn-primary { background: var(--grad); color: #050611; box-shadow: 0 8px 30px -8px rgba(61, 139, 255, 0.6); }
.btn-primary:hover { color: #050611; transform: translateY(-1px); box-shadow: 0 12px 36px -8px rgba(139, 92, 246, 0.7); }
.btn-ghost { background: var(--surface); border-color: var(--border); color: var(--text); }
.btn-ghost:hover { background: var(--surface-2); color: var(--text); border-color: var(--border-strong); }
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; }

.badge {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 0.78rem; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase;
  padding: 6px 12px; border-radius: 999px;
  background: rgba(139, 92, 246, 0.12); color: #cdb8ff; border: 1px solid rgba(139, 92, 246, 0.35);
}
.badge::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--violet); box-shadow: 0 0 10px var(--violet); }
.badge.dev::before { animation: pulse 2.4s ease-in-out infinite; }
.eyebrow { font-family: var(--mono); font-size: 0.8rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--cyan); margin-bottom: 14px; display: block; }

/* Hero */
.hero { position: relative; padding: 96px 0 80px; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: 1.15fr 0.85fr; align-items: center; gap: 48px; }
.hero p.lead { font-size: clamp(1.08rem, 1.8vw, 1.25rem); color: var(--muted); max-width: 36em; margin-bottom: 32px; }
.hero h1 { margin-bottom: 22px; }
@media (max-width: 900px) {
  .hero { padding: 64px 0 56px; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { max-width: 380px; margin: 0 auto; order: -1; }
}
.page-hero { padding: 80px 0 40px; }
.page-hero p.lead { font-size: 1.15rem; color: var(--muted); max-width: 44em; }
@media (max-width: 600px) { .page-hero { padding: 52px 0 28px; } }

/* Orbital visual */
.hero-visual { position: relative; aspect-ratio: 1; width: 100%; }
.orb {
  position: absolute; inset: 22%; border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, rgba(56,214,255,0.9), rgba(61,139,255,0.55) 35%, rgba(139,92,246,0.45) 65%, transparent 72%);
  filter: blur(2px); box-shadow: 0 0 120px 20px rgba(91, 108, 255, 0.35);
  animation: breathe 7s ease-in-out infinite;
}
.ring { position: absolute; inset: 0; border-radius: 50%; border: 1px solid rgba(140, 160, 255, 0.22); }
.ring.r1 { inset: 8%; transform: rotateX(68deg) rotateZ(0deg); animation: spin 22s linear infinite; border-color: rgba(56,214,255,0.35); }
.ring.r2 { inset: 2%; transform: rotateX(68deg) rotateY(38deg); animation: spin2 30s linear infinite; border-color: rgba(181,123,255,0.35); }
.ring.r3 { inset: 14%; transform: rotateY(72deg); animation: spin3 26s linear infinite; }
.ring::after {
  content: ""; position: absolute; top: -4px; left: 50%; width: 8px; height: 8px; border-radius: 50%;
  background: #fff; box-shadow: 0 0 14px 4px rgba(56,214,255,0.8);
}
.ring.r2::after { box-shadow: 0 0 14px 4px rgba(181,123,255,0.8); }
.hero-visual .panel {
  position: absolute; padding: 10px 14px; border-radius: 14px;
  background: rgba(14, 16, 32, 0.6); border: 1px solid var(--border-strong);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  font-family: var(--mono); font-size: 0.72rem; color: var(--muted); letter-spacing: 0.06em;
  animation: float 6s ease-in-out infinite;
}
.hero-visual .panel b { color: var(--text); font-weight: 600; display: block; font-family: var(--font); font-size: 0.85rem; letter-spacing: 0; }
.hero-visual .p1 { top: 10%; left: -2%; }
.hero-visual .p2 { bottom: 12%; right: -4%; animation-delay: -3s; }

/* Sections */
section { padding: 72px 0; }
@media (max-width: 600px) { section { padding: 52px 0; } }
.section-head { max-width: 640px; margin-bottom: 40px; }
.section-head p { color: var(--muted); font-size: 1.08rem; }

.grid { display: grid; gap: 20px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 960px) { .grid-4 { grid-template-columns: repeat(2, 1fr); } .grid-3 { grid-template-columns: 1fr 1fr; } }
@media (max-width: 640px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } }

.card {
  position: relative; padding: 28px; border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255,255,255,0.055), rgba(255,255,255,0.02));
  border: 1px solid var(--border);
  transition: border-color .3s, transform .3s, box-shadow .3s;
}
.card:hover { border-color: var(--border-strong); transform: translateY(-3px); box-shadow: 0 20px 50px -20px rgba(61,139,255,0.35); }
.card p { color: var(--muted); margin-bottom: 0; }
.card .icon {
  width: 46px; height: 46px; border-radius: 13px; display: grid; place-items: center; margin-bottom: 18px;
  background: linear-gradient(135deg, rgba(56,214,255,0.18), rgba(139,92,246,0.22));
  border: 1px solid rgba(140,160,255,0.25); color: #cfe0ff;
}
.card .icon svg { width: 22px; height: 22px; }

.project-card { display: flex; flex-direction: column; gap: 14px; }
.project-card .top { display: flex; flex-direction: column; align-items: flex-start; gap: 10px; }
.project-card .platform { font-family: var(--mono); font-size: 0.76rem; color: var(--faint); letter-spacing: 0.08em; text-transform: uppercase; }
.project-card h3 { font-size: 1.4rem; margin: 0; }
.project-card ul { margin: 0; padding-left: 1.1em; color: var(--muted); }
.project-card ul li { margin: 4px 0; }
.project-card .links { margin-top: auto; padding-top: 8px; display: flex; flex-wrap: wrap; gap: 10px; }
.card-link { font-weight: 600; text-decoration: none; display: inline-flex; align-items: center; gap: 6px; }
.card-link::after { content: "→"; transition: transform .2s; }
.card-link:hover::after { transform: translateX(3px); }

.feature-list { display: grid; gap: 16px; }
.feature {
  display: grid; grid-template-columns: 46px 1fr; gap: 18px; align-items: start;
  padding: 24px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--border);
}
.feature .icon { margin: 0; }
.feature h3 { margin-bottom: 6px; }
.feature p { color: var(--muted); margin: 0; }

.cta-band {
  border-radius: 26px; padding: 48px; position: relative; overflow: hidden;
  background: linear-gradient(135deg, rgba(56,214,255,0.1), rgba(139,92,246,0.16));
  border: 1px solid var(--border-strong);
}
.cta-band h2 { margin-bottom: 10px; }
.cta-band p { color: var(--muted); max-width: 40em; }
@media (max-width: 600px) { .cta-band { padding: 30px 22px; } }

.notice {
  padding: 18px 22px; border-radius: 14px;
  background: rgba(61,139,255,0.08); border: 1px solid rgba(61,139,255,0.3); color: #d6e4ff;
}
.notice.warn { background: rgba(255, 186, 73, 0.08); border-color: rgba(255,186,73,0.35); color: #ffe4b8; }
.notice p:last-child { margin-bottom: 0; }

/* Long-form documents (privacy, support) */
.doc { max-width: 780px; }
.doc h2 { font-size: 1.55rem; margin-top: 2.2em; padding-top: 0.4em; }
.doc h3 { margin-top: 1.6em; }
.doc p, .doc li { color: #c9cde3; }
.doc ul, .doc ol { padding-left: 1.3em; }
.doc li { margin: 6px 0; }
.doc strong { color: var(--text); }
.doc code { font-family: var(--mono); font-size: 0.88em; background: var(--surface-2); padding: 2px 6px; border-radius: 6px; color: #dbe3ff; overflow-wrap: anywhere; }
.doc .meta { font-family: var(--mono); font-size: 0.85rem; color: var(--faint); }
.toc { padding: 22px 26px; border-radius: 16px; background: var(--surface); border: 1px solid var(--border); margin: 28px 0 8px; }
.toc ol { margin: 8px 0 0; columns: 2; column-gap: 32px; }
.toc a { color: var(--muted); text-decoration: none; }
.toc a:hover { color: var(--text); }
@media (max-width: 600px) { .toc ol { columns: 1; } }
.table-wrap { overflow-x: auto; margin: 1em 0 1.4em; border: 1px solid var(--border); border-radius: 14px; }
table { border-collapse: collapse; width: 100%; font-size: 0.95rem; }
th, td { text-align: left; padding: 12px 16px; border-bottom: 1px solid var(--border); vertical-align: top; color: #c9cde3; }
th { color: var(--text); background: var(--surface); font-weight: 600; }
tr:last-child td { border-bottom: 0; }

details.faq { border: 1px solid var(--border); border-radius: 14px; background: var(--surface); margin: 12px 0; }
details.faq summary { cursor: pointer; padding: 18px 22px; font-weight: 600; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
details.faq summary::-webkit-details-marker { display: none; }
details.faq summary::after { content: "+"; color: var(--cyan); font-size: 1.3rem; line-height: 1; transition: transform .2s; }
details.faq[open] summary::after { transform: rotate(45deg); }
details.faq > div { padding: 0 22px 16px; }

.breadcrumb { font-size: 0.9rem; color: var(--faint); margin-bottom: 18px; }
.breadcrumb a { color: var(--muted); text-decoration: none; }
.breadcrumb a:hover { color: var(--text); }

/* Footer */
.site-footer { border-top: 1px solid var(--border); padding: 48px 0 40px; margin-top: 40px; background: rgba(5,6,12,0.6); }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 32px; }
.footer-grid h4 { font-size: 0.8rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--faint); margin: 0 0 14px; font-family: var(--mono); font-weight: 500; }
.footer-grid ul { list-style: none; padding: 0; margin: 0; }
.footer-grid li { margin: 8px 0; }
.footer-grid a { color: var(--muted); text-decoration: none; }
.footer-grid a:hover { color: var(--text); }
.footer-bottom { margin-top: 36px; padding-top: 22px; border-top: 1px solid var(--border); color: var(--faint); font-size: 0.88rem; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; }
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr 1fr; } .footer-grid > :first-child { grid-column: 1 / -1; } }

/* Motion */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .8s ease, transform .8s ease; }
.reveal.in { opacity: 1; transform: none; }
.no-js .reveal { opacity: 1; transform: none; }
@keyframes spin { to { transform: rotateX(68deg) rotateZ(360deg); } }
@keyframes spin2 { to { transform: rotateX(68deg) rotateY(38deg) rotateZ(360deg); } }
@keyframes spin3 { to { transform: rotateY(72deg) rotateZ(360deg); } }
@keyframes breathe { 0%, 100% { transform: scale(1); opacity: .95; } 50% { transform: scale(1.05); opacity: 1; } }
@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: .35; } }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
  .reveal { opacity: 1; transform: none; }
}

.feature .icon {
  width: 46px; height: 46px; border-radius: 13px; display: grid; place-items: center;
  background: linear-gradient(135deg, rgba(56,214,255,0.18), rgba(139,92,246,0.22));
  border: 1px solid rgba(140,160,255,0.25); color: #cfe0ff;
}
.feature .icon svg { width: 22px; height: 22px; }
@media (max-width: 480px) { .feature { grid-template-columns: 1fr; gap: 12px; padding: 20px; } }
.container.narrow { max-width: 780px; }
.footer-grid a { overflow-wrap: anywhere; }