:root {
  --bg: #0f1a24;
  --navy: #17324a;
  --green: #00bfa0;
  --fg: rgba(255, 255, 255, 0.9);
  --fg-dim: rgba(255, 255, 255, 0.55);
  --line: rgba(255, 255, 255, 0.08);
  --gutter: clamp(16px, 4vw, 48px);
  --font: "Space Grotesk", Helvetica, Arial, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  height: 100%;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-height: 100svh;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font);
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

/* Header */

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  padding: 0 var(--gutter);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, background-color 0.3s ease;
}

.site-header.is-scrolled {
  border-bottom-color: var(--line);
  background: rgba(15, 26, 36, 0.85);
  backdrop-filter: blur(8px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  letter-spacing: 0.1em;
}

.brand svg {
  width: 22px;
  height: 22px;
}

.nav {
  display: flex;
  gap: clamp(20px, 4vw, 40px);
}

.nav a {
  position: relative;
  padding: 6px 0;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--fg-dim);
  transition: color 0.15s ease;
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--green);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.15s ease;
}

.nav a:hover,
.nav a[aria-current="page"] {
  color: var(--fg);
}

.nav a:hover::after,
.nav a[aria-current="page"]::after {
  transform: scaleX(1);
}

.nav a:focus-visible,
.brand:focus-visible {
  outline: 1px solid var(--green);
  outline-offset: 4px;
}

/* Main */

main {
  position: relative;
  flex: 1;
  display: flex;
  animation: fade-in 0.6s ease both;
}

/* Home hero */

.hero {
  position: relative;
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: clamp(20px, 3vw, 36px);
  padding: 96px var(--gutter);
  overflow: hidden;
}

.scan {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.lockup {
  position: relative;
  width: clamp(260px, 50vw, 720px);
  height: auto;
}

.lockup .word {
  font-family: var(--font);
  opacity: 0;
  animation: fade-in 0.8s ease 0.1s forwards;
}

.lockup .arc {
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
  animation: draw 0.7s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.lockup .arc:nth-of-type(1) { animation-delay: 0.2s; }
.lockup .arc:nth-of-type(2) { animation-delay: 0.35s; }
.lockup .arc:nth-of-type(3) { animation-delay: 0.5s; }

.lockup .core {
  transform-box: fill-box;
  transform-origin: center;
  opacity: 0;
  animation: core 0.6s ease-out 0.85s forwards;
}

.tagline {
  position: relative;
  margin: 0;
  font-size: clamp(10px, 1.1vw, 13px);
  letter-spacing: 0.3em;
  text-transform: uppercase;
  text-align: center;
  color: var(--fg-dim);
  opacity: 0;
  animation: rise 0.8s ease 1.1s forwards;
}

/* Placeholder pages */

.page {
  flex: 1;
  padding: 140px var(--gutter) 80px;
}

.page-label {
  margin: 0;
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.3em;
  color: var(--fg-dim);
}

.page-label::before {
  content: "";
  display: inline-block;
  width: 24px;
  height: 1px;
  margin-right: 14px;
  vertical-align: middle;
  background: var(--green);
}

/* Footer */

.site-footer {
  padding: 20px var(--gutter);
  border-top: 1px solid var(--line);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--fg-dim);
}

/* Motion */

@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes rise {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}

@keyframes draw {
  to { stroke-dashoffset: 0; }
}

@keyframes core {
  0% { opacity: 0; transform: scale(0.4); }
  60% { opacity: 1; transform: scale(1.15); }
  100% { opacity: 1; transform: scale(1); }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-delay: 0s !important;
    transition-duration: 0.01ms !important;
  }
}