:root {
  --bg-0: #05080f;
  --bg-1: #081626;
  --bg-2: #0d1c2f;
  --line: rgba(92, 245, 255, 0.26);
  --line-strong: rgba(92, 245, 255, 0.65);
  --neon-cyan: #5cf5ff;
  --neon-magenta: #ff3ca6;
  --neon-lime: #a9ff56;
  --text-main: #e9f3ff;
  --text-dim: #90a9c2;
  --warning: #ffd85f;
  --panel: rgba(8, 20, 35, 0.66);
  --panel-strong: rgba(10, 24, 40, 0.9);
  --shadow-neon: 0 0 30px rgba(92, 245, 255, 0.28);
  --radius: 18px;
  --max-width: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text-main);
  background:
    radial-gradient(1200px 750px at 80% -10%, rgba(255, 60, 166, 0.14), transparent 60%),
    radial-gradient(1000px 600px at 15% 8%, rgba(92, 245, 255, 0.13), transparent 62%),
    linear-gradient(155deg, var(--bg-0), var(--bg-1) 48%, var(--bg-2));
  font-family: "Chakra Petch", "Segoe UI", sans-serif;
  min-height: 100vh;
  overflow-x: hidden;
}

img,
svg,
canvas {
  max-width: 100%;
}

a {
  color: inherit;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  z-index: 999;
  background: #fff;
  color: #111;
  padding: 0.75rem 1rem;
  text-decoration: none;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

#particle-canvas,
.backdrop-grid,
.noise-layer,
.scanline-layer {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: -4;
}

.backdrop-grid {
  z-index: -3;
  opacity: 0.38;
  background-image:
    linear-gradient(rgba(92, 245, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(92, 245, 255, 0.08) 1px, transparent 1px);
  background-size: 65px 65px;
  transform: perspective(600px) rotateX(62deg) translateY(26%);
  transform-origin: center;
}

.noise-layer {
  z-index: -2;
  opacity: 0.06;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140' viewBox='0 0 140 140'%3E%3Cg fill='%23ffffff' fill-opacity='0.4'%3E%3Ccircle cx='6' cy='12' r='1'/%3E%3Ccircle cx='66' cy='40' r='1'/%3E%3Ccircle cx='90' cy='90' r='1'/%3E%3Ccircle cx='26' cy='88' r='1'/%3E%3Ccircle cx='120' cy='16' r='1'/%3E%3C/g%3E%3C/svg%3E");
}

.scanline-layer {
  z-index: -1;
  background: repeating-linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.02),
    rgba(255, 255, 255, 0.02) 1px,
    transparent 2px,
    transparent 4px
  );
  opacity: 0.2;
}

.loader {
  position: fixed;
  inset: 0;
  z-index: 900;
  display: grid;
  place-items: center;
  background: radial-gradient(circle at 50% 20%, rgba(92, 245, 255, 0.09), #04070d 55%);
  transition: opacity 360ms ease, visibility 360ms ease;
}

.loader.loader--hidden {
  opacity: 0;
  visibility: hidden;
}

.loader-panel {
  width: min(90vw, 460px);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1.4rem;
  background: rgba(5, 12, 20, 0.78);
  box-shadow: var(--shadow-neon);
}

.loader-title {
  margin: 0;
  font-family: "Orbitron", sans-serif;
  font-size: 1rem;
  letter-spacing: 0.08em;
  color: var(--neon-cyan);
}

.loader-log {
  margin: 0.7rem 0 0.95rem;
  color: var(--text-dim);
  font-family: "Share Tech Mono", monospace;
  font-size: 0.95rem;
}

.loader-bar {
  width: 100%;
  height: 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  overflow: hidden;
  background: rgba(3, 8, 13, 0.8);
}

.loader-bar span {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--neon-cyan), var(--neon-magenta));
  box-shadow: 0 0 18px rgba(92, 245, 255, 0.55);
}

.hud-header {
  position: sticky;
  top: 0;
  z-index: 120;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: min(var(--max-width), calc(100% - 2.4rem));
  margin: 1rem auto 0;
  padding: 0.8rem 1rem;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: rgba(4, 12, 22, 0.62);
  backdrop-filter: blur(10px);
}

.brand-wrap {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  min-width: 0;
}

.brand-mark {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--neon-lime);
  box-shadow: 0 0 18px rgba(169, 255, 86, 0.65);
  animation: pulse 2.2s infinite;
}

.brand-text {
  font-family: "Orbitron", sans-serif;
  font-size: 0.82rem;
  letter-spacing: 0.1em;
  color: var(--neon-cyan);
  white-space: nowrap;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.site-nav a {
  text-decoration: none;
  color: var(--text-main);
  font-family: "Share Tech Mono", monospace;
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  position: relative;
  opacity: 0.86;
  transition: opacity 180ms ease, color 180ms ease;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.35rem;
  width: 100%;
  height: 1px;
  transform: scaleX(0);
  transform-origin: left;
  background: var(--neon-cyan);
  transition: transform 220ms ease;
}

.site-nav a:hover,
.site-nav a:focus-visible,
.site-nav a.is-active {
  color: var(--neon-cyan);
  opacity: 1;
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after,
.site-nav a.is-active::after {
  transform: scaleX(1);
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: rgba(4, 12, 20, 0.8);
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text-main);
  margin: 3px auto;
}

.sound-toggle {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.45rem 0.8rem;
  font-family: "Share Tech Mono", monospace;
  letter-spacing: 0.07em;
  font-size: 0.72rem;
  color: var(--text-main);
  background: rgba(4, 12, 22, 0.75);
  cursor: pointer;
  transition: border-color 200ms ease, color 200ms ease, box-shadow 200ms ease;
}

.sound-toggle:hover,
.sound-toggle[aria-pressed="true"] {
  border-color: var(--neon-lime);
  color: var(--neon-lime);
  box-shadow: 0 0 16px rgba(169, 255, 86, 0.26);
}

main {
  width: min(var(--max-width), calc(100% - 2.2rem));
  margin: 0 auto;
}

.section {
  padding: clamp(4.2rem, 8vw, 6.4rem) 0;
  position: relative;
}

.section[data-reveal] {
  opacity: 0;
  transform: translateY(34px);
  transition: opacity 600ms ease, transform 700ms cubic-bezier(0.18, 0.85, 0.25, 1);
}

.section[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

.eyebrow {
  margin: 0 0 0.8rem;
  color: var(--neon-lime);
  font-size: 0.74rem;
  letter-spacing: 0.2em;
  font-family: "Share Tech Mono", monospace;
}

h1,
h2,
h3 {
  margin: 0;
  font-family: "Orbitron", sans-serif;
  line-height: 1.2;
}

h1 {
  font-size: clamp(2.2rem, 6vw, 4.4rem);
  letter-spacing: 0.02em;
}

h2 {
  font-size: clamp(1.45rem, 3.2vw, 2.45rem);
}

h3 {
  font-size: clamp(1.05rem, 2.2vw, 1.2rem);
}

p {
  margin: 0;
  color: var(--text-dim);
  line-height: 1.8;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: clamp(1rem, 2vw, 2.8rem);
  align-items: center;
  min-height: min(92vh, 880px);
}

.hero-copy {
  max-width: 640px;
}

.hero-title {
  margin-bottom: 1.2rem;
}

.hero-lead {
  font-size: clamp(1rem, 1.8vw, 1.1rem);
  max-width: 58ch;
}

.glitch {
  position: relative;
  color: var(--text-main);
  text-shadow: 0 0 18px rgba(92, 245, 255, 0.18);
}

.glitch::before,
.glitch::after {
  content: attr(data-text);
  position: absolute;
  inset: 0;
  opacity: 0.75;
  pointer-events: none;
}

.glitch::before {
  color: var(--neon-cyan);
  clip-path: inset(0 0 45% 0);
  animation: glitchShiftA 4.2s infinite linear;
}

.glitch::after {
  color: var(--neon-magenta);
  clip-path: inset(58% 0 0 0);
  animation: glitchShiftB 3.4s infinite linear;
}

.hero-cta-group {
  margin-top: 1.8rem;
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.btn {
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.82rem 1.3rem;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  font-family: "Share Tech Mono", monospace;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  position: relative;
  overflow: hidden;
  transition: transform 190ms ease, box-shadow 200ms ease, border-color 200ms ease;
}

.btn::before {
  content: "";
  position: absolute;
  top: 0;
  left: -120%;
  width: 60%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.45), transparent);
  transform: skewX(-22deg);
}

.btn:hover::before,
.btn:focus-visible::before {
  animation: sweep 650ms ease;
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-1px);
}

.btn-primary {
  color: #00131d;
  background: linear-gradient(120deg, var(--neon-cyan), #6bc7ff);
  border-color: transparent;
  box-shadow: 0 0 24px rgba(92, 245, 255, 0.3);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  box-shadow: 0 0 34px rgba(92, 245, 255, 0.48);
}

.btn-ghost {
  color: var(--text-main);
  background: rgba(4, 12, 22, 0.66);
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  border-color: var(--neon-magenta);
  box-shadow: 0 0 22px rgba(255, 60, 166, 0.28);
}

.btn-large {
  padding: 1rem 1.6rem;
  font-size: 0.86rem;
  margin-top: 1.1rem;
}

.hero-stats {
  list-style: none;
  margin: 1.8rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.7rem;
}

.hero-stats li {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.85rem 0.7rem;
  background: var(--panel);
}

.hero-stats strong {
  display: block;
  color: var(--neon-cyan);
  font-family: "Orbitron", sans-serif;
  font-size: 1.08rem;
  letter-spacing: 0.04em;
}

.hero-stats span {
  display: block;
  margin-top: 0.32rem;
  color: var(--text-dim);
  font-size: 0.82rem;
}

.hero-visual {
  display: grid;
  place-items: center;
}

.holo-frame {
  width: min(480px, 90vw);
  aspect-ratio: 1 / 1;
  border: 1px solid var(--line);
  border-radius: 28px;
  background:
    linear-gradient(160deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0.005)),
    rgba(4, 14, 26, 0.5);
  position: relative;
  overflow: hidden;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45), 0 0 34px rgba(92, 245, 255, 0.13) inset;
}

.holo-frame::before,
.holo-frame::after {
  content: "";
  position: absolute;
  border: 1px dashed rgba(92, 245, 255, 0.2);
  border-radius: inherit;
  inset: 15px;
}

.holo-frame::after {
  inset: 42px;
}

.ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid var(--line);
}

.ring-a {
  inset: 15%;
  border-color: rgba(92, 245, 255, 0.35);
  animation: spin 18s linear infinite;
}

.ring-b {
  inset: 25%;
  border-color: rgba(255, 60, 166, 0.33);
  animation: spinReverse 14s linear infinite;
}

.ring-c {
  inset: 34%;
  border-color: rgba(169, 255, 86, 0.38);
  animation: spin 10s linear infinite;
}

.holo-core {
  position: absolute;
  inset: 39%;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.2);
  display: grid;
  place-items: center;
  text-align: center;
  background: radial-gradient(circle at 30% 30%, rgba(92, 245, 255, 0.24), rgba(4, 12, 20, 0.92));
  box-shadow: 0 0 30px rgba(92, 245, 255, 0.4);
}

.holo-core p {
  font-family: "Orbitron", sans-serif;
  color: var(--text-main);
  letter-spacing: 0.08em;
  font-size: 0.78rem;
}

.holo-core span {
  font-family: "Share Tech Mono", monospace;
  font-size: 0.66rem;
  color: var(--neon-lime);
}

.holo-scan {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent, rgba(92, 245, 255, 0.18), transparent);
  animation: scan 4s linear infinite;
}

.split {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(1rem, 2.2vw, 2.8rem);
  align-items: start;
}

.split h2 {
  margin-bottom: 1rem;
}

.terminal-box {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.2rem;
  background: var(--panel-strong);
  font-family: "Share Tech Mono", monospace;
  color: var(--text-main);
}

.terminal-box p {
  color: #d9e7f3;
  margin-bottom: 0.45rem;
  line-height: 1.55;
}

.terminal-box .terminal-ok {
  color: var(--neon-lime);
}

.section-lead {
  margin: 0.95rem 0 1.5rem;
  max-width: 70ch;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.feature-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.2rem;
  min-height: 176px;
  background:
    linear-gradient(130deg, rgba(92, 245, 255, 0.08), transparent 56%),
    var(--panel);
  position: relative;
  transform-style: preserve-3d;
  transition: transform 220ms ease, box-shadow 220ms ease, border-color 220ms ease;
}

.feature-card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  border: 1px solid transparent;
  background: linear-gradient(130deg, rgba(92, 245, 255, 0.5), rgba(255, 60, 166, 0.4)) border-box;
  -webkit-mask:
    linear-gradient(#fff 0 0) padding-box,
    linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 220ms ease;
}

.feature-card h3 {
  margin-bottom: 0.75rem;
  color: var(--neon-cyan);
}

.feature-card p {
  font-size: 0.96rem;
}

.feature-card:hover,
.feature-card:focus-visible {
  transform: translateY(-4px);
  border-color: rgba(92, 245, 255, 0.45);
  box-shadow: var(--shadow-neon);
}

.feature-card:hover::before,
.feature-card:focus-visible::before {
  opacity: 0.8;
}

.architecture .accordion-wrap {
  margin-top: 1.25rem;
  display: grid;
  gap: 0.6rem;
}

.architecture details {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.75rem 0.9rem;
  background: var(--panel);
}

.architecture summary {
  cursor: pointer;
  list-style: none;
  font-family: "Orbitron", sans-serif;
  color: var(--text-main);
}

.architecture summary::-webkit-details-marker {
  display: none;
}

.architecture details p {
  margin-top: 0.65rem;
}

.arch-diagram {
  min-height: 360px;
  border-radius: 20px;
  border: 1px solid var(--line);
  background:
    radial-gradient(circle at 80% 12%, rgba(255, 60, 166, 0.14), transparent 40%),
    radial-gradient(circle at 20% 80%, rgba(92, 245, 255, 0.15), transparent 35%),
    rgba(6, 14, 22, 0.7);
  position: relative;
  overflow: hidden;
}

.arch-diagram::before,
.arch-diagram::after {
  content: "";
  position: absolute;
  background: rgba(92, 245, 255, 0.26);
}

.arch-diagram::before {
  left: 22%;
  right: 22%;
  top: 50%;
  height: 1px;
}

.arch-diagram::after {
  top: 22%;
  bottom: 22%;
  left: 50%;
  width: 1px;
}

.node {
  position: absolute;
  min-width: 124px;
  padding: 0.6rem 0.8rem;
  border-radius: 999px;
  text-align: center;
  font-family: "Share Tech Mono", monospace;
  font-size: 0.74rem;
  color: var(--text-main);
  border: 1px solid var(--line-strong);
  background: rgba(6, 18, 28, 0.9);
  box-shadow: 0 0 16px rgba(92, 245, 255, 0.23);
}

.node-a {
  top: 12%;
  left: 10%;
}

.node-b {
  top: 42%;
  left: 37%;
}

.node-c {
  top: 70%;
  right: 12%;
}

.node-d {
  top: 14%;
  right: 12%;
}

.timeline {
  list-style: none;
  margin: 1.6rem 0 0;
  padding: 0;
  position: relative;
  display: grid;
  gap: 1rem;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 0.3rem;
  top: 0.4rem;
  bottom: 0.4rem;
  width: 1px;
  background: linear-gradient(var(--line-strong), rgba(92, 245, 255, 0));
}

.timeline li {
  position: relative;
  margin-left: 1.6rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1rem 1rem 1rem 1.2rem;
  background: var(--panel);
}

.timeline li::before {
  content: "";
  position: absolute;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--neon-cyan);
  left: -1.62rem;
  top: 1.2rem;
  box-shadow: 0 0 14px rgba(92, 245, 255, 0.6);
}

.timeline .time {
  font-family: "Share Tech Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.11em;
  color: var(--neon-lime);
}

.timeline h3 {
  margin: 0.45rem 0 0.65rem;
  color: var(--text-main);
}

.cta {
  border: 1px solid var(--line);
  border-radius: 26px;
  padding: clamp(2rem, 4vw, 3rem);
  background:
    radial-gradient(circle at 70% 20%, rgba(92, 245, 255, 0.14), transparent 48%),
    radial-gradient(circle at 12% 90%, rgba(255, 60, 166, 0.16), transparent 44%),
    var(--panel-strong);
}

.cta h2 {
  margin-bottom: 0.8rem;
}

.countdown {
  margin: 1.35rem 0 0.5rem;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.7rem;
  max-width: 600px;
}

.countdown > div {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.75rem;
  text-align: center;
  background: rgba(4, 12, 20, 0.65);
}

.countdown strong {
  display: block;
  font-family: "Orbitron", sans-serif;
  font-size: 1.35rem;
  color: var(--neon-cyan);
}

.countdown span {
  display: block;
  margin-top: 0.22rem;
  color: var(--text-dim);
  letter-spacing: 0.08em;
  font-size: 0.72rem;
}

.cta small {
  margin-top: 0.65rem;
  display: block;
  color: var(--warning);
}

.site-footer {
  width: min(var(--max-width), calc(100% - 2.2rem));
  margin: 0 auto 2rem;
  padding: 1.2rem 1rem;
  border-top: 1px solid var(--line);
  color: var(--text-dim);
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem 1.1rem;
  align-items: center;
  justify-content: space-between;
}

.site-footer p {
  font-size: 0.85rem;
}

.site-footer nav {
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
}

.site-footer a {
  font-family: "Share Tech Mono", monospace;
  font-size: 0.78rem;
  text-decoration: none;
}

.site-footer a:hover,
.site-footer a:focus-visible {
  color: var(--neon-cyan);
}

:focus-visible {
  outline: 2px solid var(--neon-lime);
  outline-offset: 3px;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 0.9;
    transform: scale(1);
  }
  50% {
    opacity: 1;
    transform: scale(1.14);
  }
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

@keyframes spinReverse {
  from {
    transform: rotate(360deg);
  }
  to {
    transform: rotate(0deg);
  }
}

@keyframes scan {
  0% {
    transform: translateY(-100%);
    opacity: 0;
  }
  18% {
    opacity: 0.8;
  }
  100% {
    transform: translateY(100%);
    opacity: 0;
  }
}

@keyframes sweep {
  to {
    left: 140%;
  }
}

@keyframes glitchShiftA {
  0%,
  100% {
    transform: translate(0);
  }
  8% {
    transform: translate(-2px, -1px);
  }
  12% {
    transform: translate(2px, 1px);
  }
  16% {
    transform: translate(0);
  }
  55% {
    transform: translate(0);
  }
  58% {
    transform: translate(1px, 1px);
  }
  62% {
    transform: translate(-1px, -1px);
  }
  66% {
    transform: translate(0);
  }
}

@keyframes glitchShiftB {
  0%,
  100% {
    transform: translate(0);
  }
  6% {
    transform: translate(1px, 1px);
  }
  10% {
    transform: translate(-2px, -1px);
  }
  15% {
    transform: translate(0);
  }
  51% {
    transform: translate(0);
  }
  54% {
    transform: translate(2px, -1px);
  }
  59% {
    transform: translate(-1px, 2px);
  }
  64% {
    transform: translate(0);
  }
}

@media (max-width: 1024px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    gap: 1.4rem;
  }

  .hero-copy {
    max-width: none;
  }

  .split {
    grid-template-columns: 1fr;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .arch-diagram {
    min-height: 300px;
  }
}

@media (max-width: 820px) {
  .hud-header {
    width: calc(100% - 1.3rem);
    margin-top: 0.65rem;
    padding: 0.6rem 0.75rem;
  }

  .menu-toggle {
    display: inline-block;
    order: 3;
  }

  .sound-toggle {
    order: 2;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 0.45rem);
    left: 0;
    right: 0;
    display: grid;
    gap: 0;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: rgba(4, 12, 22, 0.94);
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px);
    transition: opacity 220ms ease, visibility 220ms ease, transform 220ms ease;
  }

  .site-nav a {
    padding: 0.85rem 0.95rem;
    border-bottom: 1px solid rgba(92, 245, 255, 0.15);
  }

  .site-nav a:last-child {
    border-bottom: 0;
  }

  .hud-header.nav-open .site-nav {
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .countdown {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 600px) {
  main,
  .site-footer {
    width: calc(100% - 1.2rem);
  }

  .hero-stats {
    grid-template-columns: 1fr;
  }

  .holo-frame {
    width: min(420px, 95vw);
  }

  .site-footer {
    justify-content: center;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 1ms !important;
  }

  .section[data-reveal] {
    opacity: 1;
    transform: none;
  }

  .glitch::before,
  .glitch::after,
  .holo-scan {
    display: none;
  }
}