/* ============================================================
   XyloTech — shared site styles
   Built on colors_and_type.css design tokens.
   ============================================================ */

/* Surface override — neutralize the green-tinted backgrounds to
   graphite black per client direction. Mint/teal accents stay. */
:root {
  --xt-ink:    #08090A;   /* neutral near-black base canvas */
  --xt-ink-2:  #101113;   /* neutral elevated section */
  --xt-bark:   #161719;   /* neutral card base */
  --xt-bark-2: #1D1F22;   /* neutral card hover */
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--xt-ink);
  color: var(--fg);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { display: block; }

/* Selection */
::selection { background: color-mix(in srgb, var(--xt-mint) 40%, transparent); color: var(--xt-paper); }

/* ============================================================
   LOADER  — futuristic fade-in
   ============================================================ */
.loader {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 26px;
  background: var(--xt-ink);
  transition: opacity 600ms var(--ease-out), visibility 600ms var(--ease-out);
}
.loader.done { opacity: 0; visibility: hidden; }
.loader__mark {
  width: 64px; height: 64px;
  border-radius: 14px;
  animation: loaderPulse 1.6s var(--ease-in-out) infinite;
}
@keyframes loaderPulse {
  0%, 100% { opacity: 0.55; transform: scale(0.96); }
  50% { opacity: 1; transform: scale(1); }
}
.loader__bar {
  width: 180px; height: 2px;
  background: color-mix(in srgb, var(--xt-mint) 18%, transparent);
  border-radius: 2px;
  overflow: hidden;
}
.loader__bar i {
  display: block;
  height: 100%;
  width: 40%;
  background: linear-gradient(90deg, transparent, var(--xt-mint), var(--xt-glow));
  animation: loaderSlide 1.1s var(--ease-in-out) infinite;
}
@keyframes loaderSlide {
  0% { transform: translateX(-120%); }
  100% { transform: translateX(360%); }
}

/* ============================================================
   NAV
   ============================================================ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 80;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px clamp(24px, 5vw, 80px);
  transition: background var(--dur-3) var(--ease-out),
              border-color var(--dur-3) var(--ease-out),
              padding var(--dur-3) var(--ease-out);
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: color-mix(in srgb, var(--xt-ink) 80%, transparent);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  padding-top: 14px;
  padding-bottom: 14px;
}
.nav__brand { display: flex; align-items: center; gap: 13px; }
.nav__brand img { width: 38px; height: 38px; border-radius: 9px; }
.nav__brand .wm {
  font-family: var(--font-display);
  font-weight: 800; font-size: 21px;
  letter-spacing: -0.02em;
  color: #ffffff;
}
.nav__links { display: flex; align-items: center; gap: clamp(18px, 2.6vw, 40px); }
.nav__links a {
  font-size: 13.5px; font-weight: 700;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--xt-mist);
  transition: color var(--dur-1) var(--ease-out);
  position: relative;
}
.nav__links a:not(.nav__cta)::after {
  content: ''; position: absolute; left: 0; right: 100%; bottom: -6px;
  height: 1.5px; background: var(--xt-mint);
  transition: right var(--dur-2) var(--ease-out);
}
.nav__links a:not(.nav__cta):hover { color: var(--xt-glow); }
.nav__links a:not(.nav__cta):hover::after { right: 0; }
.nav__links a.active { color: var(--xt-mint); }
.nav__links a.active::after { right: 0; }
.nav__cta {
  border: 1px solid var(--border-strong);
  border-radius: var(--r-pill);
  padding: 9px 20px;
  color: var(--xt-mint);
  transition: background var(--dur-2) var(--ease-out), border-color var(--dur-2) var(--ease-out), color var(--dur-2) var(--ease-out);
}
.nav__cta:hover { background: var(--xt-mint); border-color: var(--xt-mint); color: var(--xt-ink); }
.nav__menu-btn {
  display: none;
  background: none; border: 1px solid var(--border-strong);
  border-radius: var(--r-sm); color: var(--xt-mint);
  padding: 8px 14px; font-size: 13px; font-weight: 700;
  letter-spacing: 0.1em; text-transform: uppercase; cursor: pointer;
}

/* Mobile drawer */
.drawer {
  position: fixed; inset: 0; z-index: 90;
  background: color-mix(in srgb, var(--xt-ink) 96%, transparent);
  backdrop-filter: blur(10px);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 28px;
  opacity: 0; visibility: hidden;
  transition: opacity var(--dur-3) var(--ease-out), visibility var(--dur-3) var(--ease-out);
}
.drawer.open { opacity: 1; visibility: visible; }
.drawer a {
  font-family: var(--font-display);
  font-size: 30px; font-weight: 700;
  color: var(--xt-paper);
}
.drawer a:hover { color: var(--xt-mint); }
.drawer__close {
  position: absolute; top: 22px; right: 24px;
  background: none; border: none; color: var(--xt-mint);
  font-size: 30px; cursor: pointer; line-height: 1;
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 15px; font-weight: 700; letter-spacing: 0.03em;
  border-radius: var(--r-md); padding: 15px 30px; cursor: pointer;
  transition: background var(--dur-2) var(--ease-out), border-color var(--dur-2) var(--ease-out),
              color var(--dur-2) var(--ease-out), transform var(--dur-1) var(--ease-out),
              box-shadow var(--dur-2) var(--ease-out);
  border: 1px solid transparent;
}
.btn:active { transform: scale(0.98); }
.btn--primary { background: var(--xt-xylo); color: var(--xt-paper); border-color: var(--xt-xylo); }
.btn--primary:hover { background: var(--xt-xylo-2); border-color: var(--xt-xylo-2); box-shadow: var(--shadow-glow); }
.btn--ghost {
  background: color-mix(in srgb, var(--xt-ink) 35%, transparent);
  color: var(--xt-paper); border-color: var(--border-strong); backdrop-filter: blur(6px);
}
.btn--ghost:hover { border-color: var(--xt-mint); color: var(--xt-glow); }
.btn--mint { background: var(--xt-mint); color: var(--xt-ink); border-color: var(--xt-mint); }
.btn--mint:hover { background: var(--xt-glow); border-color: var(--xt-glow); box-shadow: var(--shadow-glow); }

/* ============================================================
   SHARED LAYOUT / TYPE HELPERS
   ============================================================ */
.wrap { max-width: 1320px; margin: 0 auto; padding-left: clamp(24px, 5vw, 80px); padding-right: clamp(24px, 5vw, 80px); }
.section { position: relative; padding: clamp(72px, 10vw, 152px) 0; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 14px;
  font-size: 13px; font-weight: 700; letter-spacing: 0.2em;
  text-transform: uppercase; color: var(--xt-mint);
}
.eyebrow::before { content: ''; width: 32px; height: 2px; background: var(--xt-mint); }
.eyebrow--center { justify-content: center; }

.h-display {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(32px, 4.4vw, 60px);
  line-height: 1.08; letter-spacing: -0.018em;
  color: var(--xt-paper); margin: 20px 0 0;
  text-wrap: balance;
}
.h-display .accent { color: var(--xt-mint); }
.lede {
  font-size: clamp(16px, 1.4vw, 20px);
  line-height: 1.6; color: var(--xt-mist);
  margin: 22px 0 0; max-width: 60ch;
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  position: relative; z-index: 1;
  border-top: 1px solid var(--border);
  background: var(--xt-ink-2);
  padding: clamp(48px, 6vw, 80px) clamp(24px, 5vw, 80px) 40px;
}
.footer__inner { max-width: 1320px; margin: 0 auto; display: flex; flex-wrap: wrap; gap: 48px; justify-content: space-between; }
.footer__brand { max-width: 360px; }
.footer__brand .row { display: flex; align-items: center; gap: 14px; }
.footer__brand img { width: 44px; height: 44px; border-radius: 10px; }
.footer__brand .wm { font-family: var(--font-display); font-weight: 800; font-size: 24px; letter-spacing: -0.02em; color: var(--xt-mint); }
.footer__brand p { color: var(--xt-stone); font-size: 15px; line-height: 1.6; margin: 20px 0 0; }
.footer__cols { display: flex; flex-wrap: wrap; gap: clamp(40px, 6vw, 88px); }
.footer__col h4 { font-size: 12px; font-weight: 700; letter-spacing: 0.2em; text-transform: uppercase; color: var(--xt-sage); margin: 0 0 18px; }
.footer__col a, .footer__col span { display: block; font-size: 15px; color: var(--xt-mist); margin-bottom: 12px; transition: color var(--dur-1) var(--ease-out); }
.footer__col a:hover { color: var(--xt-glow); }
.footer__bar { max-width: 1320px; margin: clamp(40px, 5vw, 64px) auto 0; padding-top: 26px; border-top: 1px solid var(--divider); display: flex; flex-wrap: wrap; gap: 12px; justify-content: space-between; align-items: center; }
.footer__bar span { font-size: 13px; color: var(--xt-sage); letter-spacing: 0.04em; }
.footer__bar .patent { font-family: var(--font-mono); color: var(--xt-sage); }
.footer__social { display: flex; gap: 12px; }
.footer__social a {
  width: 38px; height: 38px; display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid var(--border-strong); border-radius: var(--r-sm);
  color: var(--xt-mint); transition: background var(--dur-2) var(--ease-out), color var(--dur-2) var(--ease-out), border-color var(--dur-2) var(--ease-out);
}
.footer__social a:hover { background: var(--xt-mint); color: var(--xt-ink); border-color: var(--xt-mint); }
.footer__social svg { width: 18px; height: 18px; }

/* ============================================================
   SCROLL REVEAL
   ============================================================ */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity var(--dur-4) var(--ease-out), transform var(--dur-4) var(--ease-out); }
.reveal.in { opacity: 1; transform: none; }
.d1 { transition-delay: 80ms; } .d2 { transition-delay: 160ms; } .d3 { transition-delay: 240ms; } .d4 { transition-delay: 320ms; }

@media (prefers-reduced-motion: reduce) {
  .reveal { transition: none; opacity: 1; transform: none; }
  .loader__mark, .loader__bar i { animation: none; }
}

/* ============================================================
   MEDIA BACKGROUND — drifting nanocellulose photograph
   Replaces the old particle canvas. Subtle, dark, legible.
   ============================================================ */
.media-bg { position: absolute; inset: 0; overflow: hidden; background: var(--xt-ink); }
.media-bg img {
  position: absolute; inset: -4%; width: 108%; height: 108%;
  object-fit: cover; opacity: 0.34;
  transform: scale(1.06);
  animation: mediaDrift 34s var(--ease-in-out) infinite alternate;
  will-change: transform;
}
.media-bg .scrim {
  position: absolute; inset: 0;
  background:
    linear-gradient(180deg, rgba(2,10,4,0.55), rgba(2,10,4,0.35) 45%, rgba(2,10,4,0.8)),
    radial-gradient(ellipse at 50% 40%, transparent, rgba(2,10,4,0.5) 85%);
}
@keyframes mediaDrift {
  from { transform: scale(1.06) translate3d(0, 0, 0); }
  to   { transform: scale(1.14) translate3d(-2.5%, -2%, 0); }
}
@media (prefers-reduced-motion: reduce) { .media-bg img { animation: none; } }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 820px) {
  .nav__links { display: none; }
  .nav__menu-btn { display: inline-flex; }
}