/* ============================================================
   KYVOS — Design system
   Dark-locked. One accent family (cyan -> indigo core energy,
   warm ember reserved for the closing CTA moment only).
   ============================================================ */

/* Self-hosted fonts (no network request, works from file://). */
@font-face{
  font-family: 'Space Grotesk';
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url('../assets/fonts/space-grotesk-latin.woff2') format('woff2');
}
@font-face{
  font-family: 'Manrope';
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url('../assets/fonts/manrope-latin.woff2') format('woff2');
}

:root{
  --bg: #08090b;
  --bg-1: #0c0e11;
  --bg-2: #101318;
  --line: rgba(255,255,255,0.09);
  --line-strong: rgba(255,255,255,0.16);

  --text: #eef1f4;
  --text-dim: #9aa3ad;
  --text-faint: #5c636d;

  --cyan: #45e0d6;
  --indigo: #6a6bea;
  --ember: #ec7a45;

  --grad-core: linear-gradient(135deg, var(--cyan), var(--indigo));
  --grad-ember: linear-gradient(135deg, var(--ember), #f2b04a);

  --radius: 3px;
  --radius-pill: 999px;

  --ease: cubic-bezier(.16,1,.3,1);
  --nav-h: 76px;

  --container: 1320px;
}

*, *::before, *::after{ box-sizing: border-box; }
html{
  background: var(--bg);
  color-scheme: dark;
  scroll-behavior: auto;
}
html.has-lenis{ scrollbar-gutter: stable; }
body{
  margin:0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Manrope', system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1,h2,h3,h4{
  font-family: 'Space Grotesk', 'Manrope', system-ui, sans-serif;
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -0.01em;
  margin: 0;
}
p{ margin:0; }
a{ color: inherit; text-decoration: none; }
ul{ margin:0; padding:0; list-style:none; }
button{ font-family: inherit; }
img, svg{ display:block; max-width:100%; }

.container{
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 40px;
}
@media (max-width: 768px){
  .container{ padding: 0 22px; }
}

::selection{ background: var(--cyan); color: #041012; }

/* ---------- fixed grain (perf-safe: fixed layer, never repaints on scroll) ---------- */
.grain{
  position: fixed; inset: 0; z-index: 60; pointer-events: none;
  opacity: .035; mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='120' height='120'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
}

/* ---------- nav ---------- */
.nav{
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  height: var(--nav-h);
  display:flex; align-items:center;
}
.nav-inner{
  width:100%; max-width: var(--container); margin: 0 auto; padding: 0 40px;
  display:flex; align-items:center; justify-content:space-between;
}
@media (max-width: 768px){ .nav-inner{ padding: 0 22px; } }

.nav-logo{
  display:flex; align-items:center; gap:10px;
  font-family:'Space Grotesk', sans-serif; font-weight:700; font-size: 19px;
  letter-spacing: 0.02em;
}
.nav-logo svg{ width: 26px; height: 26px; }

.nav-links{
  display:flex; align-items:center; gap: 34px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--line);
  padding: 10px 26px;
  border-radius: var(--radius-pill);
  backdrop-filter: blur(14px);
}
.nav-links a{
  font-size: 14px; color: var(--text-dim); position:relative;
  transition: color .3s var(--ease);
}
.nav-links a:hover{ color: var(--text); }
.nav-links a.active{ color: var(--text); }
.nav-links a.active::after{
  content:''; position:absolute; left:0; right:0; bottom:-14px; height:1px;
  background: var(--grad-core);
}

.nav-cta{
  font-size: 13.5px; font-weight: 600; color: var(--bg);
  background: var(--text);
  padding: 12px 22px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--text);
  transition: transform .35s var(--ease), background .35s var(--ease), color .35s var(--ease);
  white-space: nowrap;
}
.nav-cta:hover{ transform: translateY(-2px); }

.nav-burger{
  display:none; width: 38px; height: 38px; border-radius: 50%;
  border: 1px solid var(--line); background: rgba(255,255,255,0.04);
  align-items:center; justify-content:center; cursor:pointer;
}
.nav-burger span, .nav-burger::before, .nav-burger::after{ display:none; }
.nav-burger .bars{ position:relative; width:16px; height:10px; }
.nav-burger .bars i{
  position:absolute; left:0; right:0; height:1px; background: var(--text);
  transition: transform .3s var(--ease), opacity .3s var(--ease);
}
.nav-burger .bars i:nth-child(1){ top:0; }
.nav-burger .bars i:nth-child(2){ bottom:0; }
.nav-burger.open .bars i:nth-child(1){ transform: translateY(4.5px) rotate(45deg); }
.nav-burger.open .bars i:nth-child(2){ transform: translateY(-4.5px) rotate(-45deg); }

@media (max-width: 860px){
  .nav-links{ display:none; }
  .nav-burger{ display:flex; }
}

.mobile-menu{
  position: fixed; inset: 0; z-index: 45;
  background: rgba(6,7,9,0.98);
  display:flex; flex-direction:column; align-items:flex-start; justify-content:center;
  gap: 26px; padding: 0 32px;
  opacity: 0; visibility: hidden; transform: translateY(-8px);
  transition: opacity .4s var(--ease), transform .4s var(--ease), visibility 0s linear .4s;
}
.mobile-menu.open{
  opacity: 1; visibility: visible; transform: translateY(0);
  transition: opacity .4s var(--ease), transform .4s var(--ease);
}
.mobile-menu a{ font-family:'Space Grotesk',sans-serif; font-size: 34px; color: var(--text); }
.mobile-menu .nav-cta{
  margin-top: 12px; align-self: flex-start;
  font-family: 'Manrope', sans-serif; font-size: 13.5px; display: inline-flex;
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex; align-items:center; gap: 10px;
  font-size: 14.5px; font-weight: 600;
  padding: 15px 28px;
  border-radius: var(--radius-pill);
  transition: transform .35s var(--ease), background .35s var(--ease), border-color .35s var(--ease);
  white-space: nowrap;
}
.btn-solid{ background: var(--text); color: var(--bg); border: 1px solid var(--text); }
.btn-solid:hover{ transform: translateY(-2px); }
.btn-ghost{ background: transparent; color: var(--text); border: 1px solid var(--line-strong); }
.btn-ghost:hover{ border-color: var(--cyan); color: var(--cyan); transform: translateY(-2px); }
.btn-arrow{ transition: transform .35s var(--ease); }
.btn:hover .btn-arrow{ transform: translateX(4px); }

/* ---------- footer ---------- */
.site-footer{
  border-top: 1px solid var(--line);
  padding: 64px 0 32px;
}
.footer-top{
  display:flex; justify-content:space-between; align-items:flex-end; gap: 40px;
  flex-wrap: wrap;
  padding-bottom: 40px;
}
.footer-head{
  font-family:'Space Grotesk',sans-serif; font-size: clamp(28px, 4vw, 44px);
  max-width: 620px;
}
.footer-nav{ display:flex; gap: 48px; flex-wrap: wrap; }
.footer-col h5{ font-size: 12px; text-transform:uppercase; letter-spacing:.14em; color: var(--text-faint); font-weight:600; margin-bottom: 14px; }
.footer-col a, .footer-col span{ display:block; font-size: 14.5px; color: var(--text-dim); padding: 5px 0; }
.footer-col a:hover{ color: var(--text); }
.footer-bottom{
  display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap: 12px;
  padding-top: 26px; border-top: 1px solid var(--line);
  font-size: 12.5px; color: var(--text-faint);
}

/* ---------- shared section utilities ---------- */
.section{ position: relative; padding: 140px 0; }
@media (max-width: 768px){ .section{ padding: 88px 0; } }

.eyebrow{
  font-size: 12px; text-transform: uppercase; letter-spacing: .18em;
  color: var(--text-faint); font-weight: 600;
}
.section-head{ max-width: 760px; margin-bottom: 64px; }
.section-head h2{ font-size: clamp(30px, 4.2vw, 52px); }
.section-head p{ color: var(--text-dim); font-size: 17px; margin-top: 18px; max-width: 56ch; }

.reveal{ opacity: 0; transform: translateY(28px); }
.reveal.is-in{ opacity: 1; transform: translateY(0); transition: opacity .8s var(--ease), transform .8s var(--ease); }

@media (prefers-reduced-motion: reduce){
  .reveal{ opacity: 1 !important; transform: none !important; transition: none !important; }
}

/* ---------- page hero (interior pages) ---------- */
.page-hero{
  padding: calc(var(--nav-h) + 26px) 0 36px;
  position: relative;
}
.page-hero h1{ font-size: clamp(34px, 6.4vw, 84px); max-width: 900px; }
@media (max-width: 480px){ .page-hero h1{ font-size: 32px; } }
.page-hero .lede{ color: var(--text-dim); font-size: 18px; max-width: 54ch; margin-top: 22px; }

/* ---------- cursor-reactive canvas accent (lightweight, used site-wide) ---------- */
.fx-canvas{ position:absolute; inset:0; pointer-events:none; }

/* ---------- misc ---------- */
.hairline{ height:1px; background: var(--line); border:0; }
.glow-panel{
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--line);
  border-radius: 10px;
}

/* ---------- ambient backdrop (interior pages) ---------- */
#ambient-canvas{
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
}
body:has(#ambient-canvas) main,
body:has(#ambient-canvas) .site-footer{
  position: relative; z-index: 1;
}

/* ---------- spotlight-border card: glow follows the cursor ---------- */
.spotlight{ position: relative; }
.spotlight::before{
  content:''; position:absolute; inset:0; z-index:0; border-radius: inherit;
  background: radial-gradient(220px circle at var(--mx,50%) var(--my,50%), rgba(69,224,214,0.14), transparent 70%);
  opacity:0; transition: opacity .4s var(--ease);
  pointer-events:none;
}
.spotlight:hover::before{ opacity:1; }
.spotlight > *{ position:relative; z-index:1; }

/* ---------- tilt card ---------- */
[data-tilt]{ transform-style: preserve-3d; will-change: transform; }

/* ---------- clip-path reveal (bolder than the plain fade) ---------- */
.reveal-clip{
  opacity:0; clip-path: inset(0 0 100% 0); transform: translateY(18px);
}
.reveal-clip.is-in{
  opacity:1; clip-path: inset(0 0 0% 0); transform: translateY(0);
  transition: opacity .7s var(--ease), clip-path .9s var(--ease), transform .9s var(--ease);
}
@media (prefers-reduced-motion: reduce){
  .reveal-clip{ opacity:1 !important; clip-path:none !important; transform:none !important; }
}