:root {
  --bg-main: #02030a;
  --bg-elevated: #050816;
  --accent-cyan: #00f5ff;
  --accent-pink: #ff00ff;
  --accent-green: #39ff14;
  --accent-yellow: #ffe600;
  --text-main: #f5f5f5;
  --text-sub: #7a8ba8;
  --border-soft: rgba(0, 245, 255, 0.18);
  --border-strong: rgba(0, 245, 255, 0.5);
  --font-heading: "Orbitron", "Rajdhani", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: "Roboto Mono", "Source Code Pro", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas,
    "Liberation Mono", "Courier New", monospace;
  --transition-fast: 0.25s ease;
  --transition-mid: 0.5s ease;
  --shadow-neon: 0 0 14px rgba(0, 245, 255, 0.5), 0 0 32px rgba(255, 0, 255, 0.28);
}

/* Reset & Base */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: radial-gradient(circle at top, #050816 0%, #010208 40%, #000 100%);
  color: var(--text-main);
  font-family: var(--font-body);
  scroll-behavior: smooth;
}

body {
  overflow-x: hidden;
}

/* Scrollbar (WebKit) */
body::-webkit-scrollbar {
  width: 8px;
}
body::-webkit-scrollbar-track {
  background: #02030a;
}
body::-webkit-scrollbar-thumb {
  background: linear-gradient(to bottom, var(--accent-cyan), var(--accent-pink));
}

/* Loading Screen */
#loading-screen {
  position: fixed;
  inset: 0;
  background: radial-gradient(circle at top, #050816 0%, #000 70%);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  color: var(--accent-cyan);
  font-family: var(--font-body);
  overflow: hidden;
}

.loading-grid {
  width: min(460px, 90vw);
  padding: 28px 26px 22px;
  border: 1px solid var(--border-strong);
  background: rgba(0, 0, 0, 0.9);
  box-shadow: var(--shadow-neon);
  position: relative;
}

.loading-grid::before,
.loading-grid::after {
  content: "";
  position: absolute;
  inset: 6px;
  border: 1px solid rgba(0, 245, 255, 0.06);
  pointer-events: none;
}

.logo-mark {
  font-family: var(--font-heading);
  font-size: 14px;
  letter-spacing: 0.18em;
  color: var(--accent-pink);
  margin-bottom: 10px;
}

.scanline {
  height: 1px;
  background: linear-gradient(to right, transparent, var(--accent-cyan), transparent);
  margin-bottom: 12px;
  animation: scanline-move 1.2s linear infinite;
}

.loading-text {
  font-size: 13px;
  letter-spacing: 0.12em;
  margin-bottom: 10px;
}

.loading-bar {
  width: 100%;
  height: 6px;
  border: 1px solid var(--accent-cyan);
  margin-bottom: 10px;
  overflow: hidden;
}

.loading-bar-fill {
  width: 0%;
  height: 100%;
  background: linear-gradient(to right, var(--accent-pink), var(--accent-cyan));
  animation: loading-fill 2.8s cubic-bezier(0.19, 1, 0.22, 1) forwards;
}

.loading-code {
  font-size: 10px;
  color: var(--text-sub);
  line-height: 1.5;
  margin-top: 4px;
  white-space: nowrap;
}

/* HUD Navigation */
.hud-nav {
  position: fixed;
  top: 14px;
  left: 50%;
  transform: translateX(-50%);
  width: min(1180px, 96vw);
  padding: 10px 18px;
  background: radial-gradient(circle at top, rgba(0, 245, 255, 0.08), rgba(0, 0, 0, 0.94));
  border: 1px solid var(--border-soft);
  border-radius: 10px;
  backdrop-filter: blur(16px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  z-index: 80;
}

.hud-logo {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.hud-logo-mark {
  font-size: 9px;
  color: var(--accent-cyan);
  letter-spacing: 0.18em;
}

.hud-logo-text {
  font-family: var(--font-heading);
  font-size: 15px;
  color: var(--accent-pink);
  letter-spacing: 0.14em;
}

.hud-links {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  font-size: 9px;
}

.hud-link {
  color: var(--text-sub);
  text-decoration: none;
  letter-spacing: 0.16em;
  padding: 4px 6px;
  border-radius: 4px;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
  position: relative;
}

.hud-link::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  border: 1px solid rgba(0, 245, 255, 0.06);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.hud-link:hover {
  color: var(--accent-cyan);
  border-color: rgba(0, 245, 255, 0.24);
  box-shadow: 0 0 12px rgba(0, 245, 255, 0.24);
}
.hud-link:hover::after {
  opacity: 1;
}

.hud-link.cta-small {
  color: var(--accent-yellow);
  border-color: rgba(255, 230, 0, 0.28);
}

.hud-status {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 8px;
  color: var(--accent-green);
}

.hud-dot {
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: var(--accent-green);
  box-shadow: 0 0 12px var(--accent-green);
  animation: pulse 1.4s infinite;
}

.hud-label {
  letter-spacing: 0.16em;
}

/* Background Grid & Particles */
.bg-grid {
  position: fixed;
  inset: 0;
  background-image: linear-gradient(rgba(0, 245, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 245, 255, 0.05) 1px, transparent 1px);
  background-size: 80px 80px;
  opacity: 0.18;
  mix-blend-mode: screen;
  pointer-events: none;
  z-index: -2;
}

#bg-particles {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

/* パーティクルを視認しやすくするための軽いオーバーレイ */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 20% 0%, rgba(0, 245, 255, 0.14), transparent 55%),
    radial-gradient(circle at 80% 10%, rgba(255, 0, 255, 0.14), transparent 55%);
  mix-blend-mode: screen;
  opacity: 0.8;
  z-index: -1;
}

/* Sections */
.section {
  width: min(1180px, 92vw);
  margin: 0 auto;
  padding: 120px 0 60px;
  position: relative;
  z-index: 1;
}

.section-label {
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--accent-cyan);
  text-transform: uppercase;
  margin-bottom: 6px;
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(20px, 3vw, 30px);
  letter-spacing: 0.16em;
  margin: 0 0 18px;
  color: var(--accent-pink);
}

.section-body {
  font-size: 13px;
  color: var(--text-sub);
  line-height: 1.9;
  margin: 0 0 24px;
}

/* HERO */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: stretch;
  padding-top: 120px;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(320px, 1.1fr);
  gap: 40px;
  align-items: center;
}

.hero-label {
  font-size: 9px;
  color: var(--accent-cyan);
  letter-spacing: 0.24em;
  margin-bottom: 12px;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(28px, 5vw, 44px);
  letter-spacing: 0.18em;
  margin: 0 0 14px;
  text-transform: uppercase;
}

.cursor {
  display: inline-block;
  width: 10px;
  background: var(--accent-cyan);
  margin-left: 4px;
  animation: blink 0.9s steps(1) infinite;
}

.hero-sub {
  font-size: 13px;
  color: var(--text-sub);
  line-height: 1.9;
  margin-bottom: 18px;
}

.hero-cta-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 14px;
}

.btn-neo {
  position: relative;
  padding: 10px 18px;
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  border-radius: 4px;
  border: 1px solid var(--border-strong);
  background: transparent;
  color: var(--accent-cyan);
  cursor: pointer;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition-fast);
}

.btn-neo.primary {
  background: radial-gradient(circle at top, rgba(0, 245, 255, 0.22), rgba(0, 0, 0, 0.96));
  color: var(--accent-yellow);
  box-shadow: 0 0 10px rgba(0, 245, 255, 0.28);
}

.btn-neo.ghost {
  border-color: rgba(255, 0, 255, 0.36);
  color: var(--accent-pink);
}

.btn-neo.large {
  padding: 12px 22px;
  font-size: 11px;
}

.btn-neo .btn-glitch {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to right,
    transparent,
    rgba(255, 0, 255, 0.2),
    rgba(0, 245, 255, 0.25),
    transparent
  );
  opacity: 0;
  mix-blend-mode: screen;
  pointer-events: none;
}

.btn-neo:hover {
  box-shadow: var(--shadow-neon);
  transform: translateY(-1px);
}
.btn-neo:hover .btn-glitch {
  opacity: 1;
  animation: btn-glitch 0.25s linear;
}

.hero-meta {
  display: grid;
  gap: 4px;
  font-size: 9px;
  color: var(--text-sub);
}

.meta-item {
  display: flex;
  gap: 6px;
  align-items: baseline;
}

.meta-label {
  color: var(--accent-cyan);
  letter-spacing: 0.16em;
  font-size: 8px;
}

.meta-value.accent {
  color: var(--accent-yellow);
}

/* Hologram Card */
.hero-right {
  display: flex;
  justify-content: center;
}

.holo-card {
  width: 100%;
  max-width: 360px;
  padding: 14px 14px 10px;
  border-radius: 12px;
  background: radial-gradient(circle at top, rgba(0, 245, 255, 0.08), rgba(0, 0, 0, 0.98));
  border: 1px solid var(--border-strong);
  box-shadow: var(--shadow-neon);
  position: relative;
  overflow: hidden;
}

.holo-card::before {
  content: "";
  position: absolute;
  inset: 10px;
  border-radius: 10px;
  border: 1px solid rgba(0, 245, 255, 0.12);
  opacity: 0.6;
  pointer-events: none;
}

.holo-header {
  font-size: 9px;
  letter-spacing: 0.2em;
  color: var(--accent-cyan);
  margin-bottom: 10px;
}

.holo-body {
  display: grid;
  gap: 8px;
}

.holo-orbit {
  position: relative;
  height: 150px;
  display: grid;
  place-items: center;
}

.holo-orbit-ring {
  position: absolute;
  border-radius: 999px;
  border: 1px solid rgba(0, 245, 255, 0.18);
  animation: orbit-rotate 8s linear infinite;
}

.holo-orbit-ring.ring1 {
  width: 70px;
  height: 70px;
}
.holo-orbit-ring.ring2 {
  width: 110px;
  height: 40px;
  transform: rotateX(70deg);
  animation-duration: 6s;
}
.holo-orbit-ring.ring3 {
  width: 140px;
  height: 90px;
  animation-duration: 10s;
}

.holo-node {
  position: absolute;
  border-radius: 999px;
  box-shadow: 0 0 16px rgba(0, 245, 255, 0.96);
}

.node-main {
  width: 16px;
  height: 16px;
  background: var(--accent-cyan);
}
.node-sub {
  width: 7px;
  height: 7px;
  background: var(--accent-pink);
  top: 26%;
  right: 20%;
}

.holo-stats {
  display: grid;
  gap: 4px;
  font-size: 9px;
  color: var(--text-sub);
}

.holo-stats .stat {
  display: flex;
  justify-content: space-between;
}

.holo-stats .stat span:first-child {
  color: var(--accent-cyan);
  letter-spacing: 0.16em;
}

.holo-footer {
  margin-top: 4px;
  font-size: 8px;
  color: var(--accent-green);
}

/* Intro Section */
.section-intro .intro-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 14px;
}

.intro-card {
  padding: 12px 10px;
  border-radius: 8px;
  background: radial-gradient(circle at top, rgba(0, 245, 255, 0.06), rgba(0, 0, 0, 0.96));
  border: 1px solid rgba(0, 245, 255, 0.18);
  font-size: 10px;
  color: var(--text-sub);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(6px);
}

.intro-card::after {
  content: "";
  position: absolute;
  width: 80px;
  height: 1px;
  right: -40px;
  bottom: 8px;
  background: linear-gradient(to right, transparent, var(--accent-pink));
  opacity: 0.4;
}

.intro-label {
  font-size: 8px;
  color: var(--accent-cyan);
  margin-bottom: 6px;
  letter-spacing: 0.16em;
}

/* Solution Section */
.section-solution {
  padding-top: 80px;
}

.solution-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.solution-item {
  padding: 12px 10px;
  border-radius: 10px;
  border: 1px solid rgba(0, 245, 255, 0.16);
  background: radial-gradient(circle at top left, rgba(255, 0, 255, 0.06), rgba(0, 0, 0, 0.98));
  font-size: 10px;
  color: var(--text-sub);
  display: grid;
  gap: 4px;
  position: relative;
  overflow: hidden;
  transition: all var(--transition-fast);
}

.solution-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-neon);
  border-color: rgba(0, 245, 255, 0.5);
}

.solution-icon {
  width: 26px;
  height: 26px;
  border-radius: 6px;
  border: 1px solid var(--accent-cyan);
  display: grid;
  place-items: center;
  font-size: 9px;
  color: var(--accent-cyan);
  margin-bottom: 2px;
  box-shadow: 0 0 10px rgba(0, 245, 255, 0.3);
}

.solution-item h3 {
  font-family: var(--font-heading);
  font-size: 11px;
  color: var(--accent-pink);
  letter-spacing: 0.06em;
  margin: 0;
}

.solution-item p {
  margin: 0;
  line-height: 1.6;
}

.solution-note {
  margin-top: 10px;
  font-size: 9px;
  color: var(--text-sub);
}

/* Architecture */
.section-architecture {
  padding-top: 80px;
}

.architecture-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1.5fr);
  gap: 26px;
  margin-top: 20px;
}

.architecture-diagram {
  padding: 12px 10px;
  border-radius: 10px;
  border: 1px solid var(--border-strong);
  background: radial-gradient(circle at top, rgba(0, 245, 255, 0.04), rgba(0, 0, 0, 0.98));
  font-size: 9px;
  display: grid;
  gap: 6px;
  position: relative;
  overflow: hidden;
}

.architecture-diagram::before {
  content: "TOPOLOGY_MAP//CHIMERA_CORE";
  position: absolute;
  top: 6px;
  right: 10px;
  font-size: 7px;
  color: rgba(0, 245, 255, 0.4);
  letter-spacing: 0.16em;
}

.layer {
  padding: 6px;
  border-radius: 4px;
  border: 1px solid rgba(0, 245, 255, 0.18);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}

.layer span {
  color: var(--accent-cyan);
}

.architecture-details {
  font-size: 10px;
  color: var(--text-sub);
  line-height: 1.8;
}

.architecture-list {
  padding-left: 14px;
  margin: 10px 0 0;
}

/* Usecases */
.section-usecases {
  padding-top: 80px;
}

.usecases-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 20px;
  font-size: 10px;
  color: var(--text-sub);
}

.usecase {
  padding: 12px 10px;
  border-radius: 10px;
  border: 1px solid rgba(0, 245, 255, 0.16);
  background: radial-gradient(circle at top, rgba(0, 245, 255, 0.03), rgba(0, 0, 0, 0.98));
  line-height: 1.7;
  position: relative;
  overflow: hidden;
}

.usecase h3 {
  font-family: var(--font-heading);
  font-size: 11px;
  color: var(--accent-pink);
  margin: 0 0 6px;
}

.usecase.timeline {
  grid-row: span 2;
  display: flex;
  flex-direction: column;
}

.usecase.timeline h4 {
  font-family: var(--font-heading);
  font-size: 10px;
  color: var(--accent-cyan);
  margin: 0 0 6px;
  letter-spacing: 0.12em;
}

.usecase.timeline ul {
  list-style: none;
  padding-left: 0;
  margin: 0;
  display: grid;
  gap: 4px;
}

.usecase.timeline li {
  display: flex;
  align-items: center;
  gap: 6px;
}

.tag {
  display: inline-flex;
  padding: 2px 5px;
  border-radius: 4px;
  border: 1px solid rgba(0, 245, 255, 0.4);
  font-size: 8px;
  color: var(--accent-cyan);
}

/* CTA */
.section-cta {
  padding-top: 80px;
  padding-bottom: 70px;
}

.cta-form {
  margin-top: 18px;
  padding: 16px 14px 12px;
  border-radius: 12px;
  border: 1px solid var(--border-strong);
  background: radial-gradient(circle at top, rgba(0, 245, 255, 0.08), rgba(0, 0, 0, 0.98));
  box-shadow: var(--shadow-neon);
  display: grid;
  gap: 10px;
  max-width: 520px;
}

.form-row {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 9px;
}

.form-row.inline {
  flex-direction: row;
  align-items: center;
  gap: 8px;
}

label {
  color: var(--accent-cyan);
  letter-spacing: 0.12em;
}

input,
select {
  background: rgba(0, 0, 0, 0.9);
  border-radius: 4px;
  border: 1px solid rgba(0, 245, 255, 0.4);
  padding: 7px 8px;
  color: var(--text-main);
  font-family: var(--font-body);
  font-size: 10px;
  outline: none;
  transition: all var(--transition-fast);
}

input::placeholder {
  color: rgba(122, 139, 168, 0.6);
}

input:focus,
select:focus {
  box-shadow: var(--shadow-neon);
  border-color: var(--accent-pink);
}

.checkbox {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  color: var(--text-sub);
}

.checkbox input {
  width: 10px;
  height: 10px;
  cursor: pointer;
}

.cta-note {
  font-size: 8px;
  color: var(--text-sub);
}

.form-response {
  font-size: 9px;
  min-height: 14px;
  color: var(--accent-green);
  margin-top: 2px;
}

/* Footer */
.footer {
  padding: 18px 0 20px;
  border-top: 1px solid rgba(0, 245, 255, 0.18);
  background: radial-gradient(circle at top, rgba(0, 245, 255, 0.03), #000);
  font-size: 8px;
  color: var(--text-sub);
}

.footer-grid {
  width: min(1180px, 92vw);
  margin: 0 auto 10px;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 10px;
  align-items: flex-start;
}

.footer-logo {
  font-family: var(--font-heading);
  font-size: 11px;
  color: var(--accent-pink);
  letter-spacing: 0.16em;
  margin-bottom: 4px;
}

.footer-copy {
  font-size: 8px;
}

.footer-link {
  display: block;
  color: var(--accent-cyan);
  text-decoration: none;
  margin-bottom: 4px;
  letter-spacing: 0.12em;
}

.footer-link:hover {
  color: var(--accent-pink);
}

.footer-sns {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.sns-label {
  color: var(--accent-cyan);
  letter-spacing: 0.16em;
}

.sns-icon {
  display: inline-flex;
  width: 16px;
  height: 16px;
  border-radius: 4px;
  border: 1px solid rgba(0, 245, 255, 0.46);
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
  text-decoration: none;
  font-size: 9px;
  margin-right: 4px;
  transition: all var(--transition-fast);
}

.sns-icon:hover {
  background: rgba(0, 245, 255, 0.12);
  color: var(--accent-pink);
  box-shadow: 0 0 10px rgba(0, 245, 255, 0.5);
}

.sound-toggle {
  width: min(1180px, 92vw);
  margin: 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 8px;
  border-radius: 16px;
  border: 1px solid rgba(0, 245, 255, 0.35);
  color: var(--accent-cyan);
  font-size: 8px;
  cursor: pointer;
  user-select: none;
  transition: all var(--transition-fast);
}

.sound-toggle:hover,
.sound-toggle:focus-visible {
  outline: none;
  box-shadow: var(--shadow-neon);
  transform: translateY(-1px);
}

.sound-label {
  letter-spacing: 0.16em;
}

.sound-status {
  color: var(--accent-pink);
}

/* Glitch Text */
.glitch {
  position: relative;
  color: var(--accent-pink);
  text-shadow: 0.04em 0 0 rgba(0, 245, 255, 0.8), -0.04em 0 0 rgba(255, 0, 255, 0.7);
}

.glitch::before,
.glitch::after {
  content: attr(data-text);
  position: absolute;
  left: 0;
  top: 0;
  opacity: 0.7;
  clip-path: inset(0 0 50% 0);
}

.glitch::before {
  transform: translate(-0.06em, -0.02em);
  color: var(--accent-cyan);
  mix-blend-mode: screen;
}

.glitch::after {
  transform: translate(0.06em, 0.02em);
  color: var(--accent-pink);
  mix-blend-mode: screen;
}

.glitch:hover {
  animation: glitch-shake 0.16s infinite;
}

/* Animations */
@keyframes scanline-move {
  0% {
    transform: translateX(-40%);
  }
  100% {
    transform: translateX(40%);
  }
}

@keyframes loading-fill {
  0% {
    width: 0%;
  }
  40% {
    width: 40%;
  }
  80% {
    width: 78%;
  }
  100% {
    width: 100%;
  }
}

@keyframes blink {
  0%,
  50% {
    opacity: 1;
  }
  51%,
  100% {
    opacity: 0;
  }
}

@keyframes pulse {
  0%,
  100% {
    transform: scale(1);
    opacity: 0.9;
  }
  50% {
    transform: scale(1.14);
    opacity: 0.3;
  }
}

@keyframes orbit-rotate {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

@keyframes glitch-shake {
  0% {
    transform: translate(0);
  }
  25% {
    transform: translate(-1px, 1px);
  }
  50% {
    transform: translate(1px, -1px);
  }
  75% {
    transform: translate(-1px, -1px);
  }
  100% {
    transform: translate(1px, 1px);
  }
}

@keyframes btn-glitch {
  0% {
    transform: translateX(-100%);
  }
  100% {
    transform: translateX(100%);
  }
}

/* Scroll reveal base (for JS intersection) */
[data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
[data-reveal].visible {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive */
@media (max-width: 900px) {
  .hud-nav {
    flex-wrap: wrap;
    padding: 8px 10px;
  }
  .hud-links {
    justify-content: flex-start;
  }
  .hero-inner {
    grid-template-columns: 1fr;
  }
  .hero {
    padding-top: 120px;
  }
  .section {
    padding-top: 80px;
  }
  .section-intro .intro-grid {
    grid-template-columns: 1fr;
  }
  .solution-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .architecture-layout {
    grid-template-columns: 1fr;
  }
  .usecases-grid {
    grid-template-columns: 1fr;
  }
  .usecase.timeline {
    grid-row: auto;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 520px) {
  .hud-nav {
    position: fixed;
    top: 6px;
    padding: 6px 8px;
  }
  .hud-logo-text {
    font-size: 11px;
  }
  .hud-links {
    gap: 6px;
    font-size: 7px;
  }
  .hero-title {
    font-size: 24px;
  }
}