:root {
  color-scheme: dark;
  --bg: #04080d;
  --bg-soft: rgba(9, 18, 26, 0.94);
  --panel: rgba(9, 17, 26, 0.9);
  --panel-strong: rgba(10, 23, 35, 0.98);
  --panel-border: rgba(81, 143, 167, 0.18);
  --panel-border-strong: rgba(163, 228, 247, 0.26);
  --text: #eef6fa;
  --muted: #9fb3bf;
  --accent: #a9f0ff;
  --accent-strong: #63cce5;
  --accent-soft: rgba(99, 204, 229, 0.16);
  --alert: #d0f5ff;
  --shadow: 0 30px 80px rgba(0, 0, 0, 0.35);
  --radius-xl: 2rem;
  --radius-lg: 1.4rem;
  --radius-md: 1rem;
  --max-width: 1240px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--text);
  font-family: "Avenir Next", "Helvetica Neue", Helvetica, Arial, sans-serif;
  background:
    radial-gradient(circle at top left, rgba(70, 170, 196, 0.18), transparent 24%),
    radial-gradient(circle at 82% 12%, rgba(125, 228, 255, 0.12), transparent 20%),
    linear-gradient(180deg, #07111a 0%, #04080d 46%, #03060b 100%);
}

body::before,
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -2;
}

body::before {
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 86px 86px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.52), transparent 82%);
}

body::after {
  background:
    radial-gradient(circle at 12% 20%, rgba(255, 255, 255, 0.14) 0 1px, transparent 1px),
    radial-gradient(circle at 72% 18%, rgba(255, 255, 255, 0.14) 0 1px, transparent 1px),
    radial-gradient(circle at 86% 72%, rgba(255, 255, 255, 0.12) 0 1.2px, transparent 1.2px),
    radial-gradient(circle at 22% 78%, rgba(255, 255, 255, 0.1) 0 1px, transparent 1px);
}

.page-noise {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    linear-gradient(120deg, rgba(255, 255, 255, 0.018), transparent 22%, rgba(255, 255, 255, 0.012) 58%, transparent 78%),
    radial-gradient(circle at center, rgba(109, 229, 255, 0.06), transparent 36%);
  mix-blend-mode: screen;
}

img {
  display: block;
  max-width: 100%;
}

a,
button,
summary {
  transition:
    color 180ms ease,
    background-color 180ms ease,
    border-color 180ms ease,
    transform 180ms ease,
    opacity 180ms ease,
    box-shadow 180ms ease;
}

a {
  color: inherit;
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  z-index: 20;
  padding: 0.7rem 1rem;
  background: #fff;
  color: #000;
  border-radius: 999px;
}

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

.site-shell {
  width: min(var(--max-width), calc(100% - 2rem));
  margin: 0 auto;
  padding-bottom: 4rem;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 12;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.2rem;
  padding: 1.1rem 0 0.9rem;
}

.topbar::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 0 0 1.6rem 1.6rem;
  background: rgba(4, 8, 13, 0.38);
  border: 1px solid transparent;
  backdrop-filter: blur(0);
  transition: background-color 180ms ease, border-color 180ms ease, backdrop-filter 180ms ease;
  z-index: -1;
}

.topbar.is-scrolled::before {
  background: rgba(4, 8, 13, 0.82);
  border-color: rgba(163, 228, 247, 0.14);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  width: min(24rem, 100%);
}

.brand img {
  width: 100%;
  height: auto;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.8rem;
}

.nav a {
  padding: 0.72rem 1rem;
  border: 1px solid rgba(96, 141, 158, 0.18);
  border-radius: 999px;
  text-decoration: none;
  color: var(--muted);
  background: rgba(7, 14, 20, 0.65);
  font-size: 0.95rem;
}

.nav a:hover,
.nav a.is-active {
  color: var(--text);
  border-color: rgba(169, 240, 255, 0.38);
  transform: translateY(-1px);
}

.section {
  margin-top: 4.4rem;
}

.panel {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-xl);
  background:
    linear-gradient(180deg, rgba(10, 21, 31, 0.95), rgba(6, 13, 20, 0.96)),
    linear-gradient(135deg, rgba(99, 204, 229, 0.06), transparent 48%);
  border: 1px solid var(--panel-border);
  box-shadow: var(--shadow);
}

.panel::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(140deg, rgba(255, 255, 255, 0.02), transparent 20%),
    linear-gradient(320deg, rgba(99, 204, 229, 0.05), transparent 28%);
  pointer-events: none;
}

.eyebrow {
  margin: 0 0 0.9rem;
  color: var(--accent);
  font-family: "SFMono-Regular", "Menlo", "Monaco", "Consolas", monospace;
  font-size: 0.82rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
}

h1,
h2,
h3,
summary {
  margin: 0;
  font-family: "Avenir Next Condensed", "DIN Condensed", "Arial Narrow", sans-serif;
  letter-spacing: 0.01em;
}

h1 {
  max-width: 10ch;
  font-size: clamp(3.3rem, 7vw, 6.5rem);
  line-height: 0.92;
}

h2 {
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 0.94;
}

h3 {
  font-size: 1.5rem;
  line-height: 1;
}

p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

code {
  font-family: "SFMono-Regular", "Menlo", "Monaco", "Consolas", monospace;
  font-size: 0.94em;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  gap: 1.4rem;
  align-items: stretch;
}

.hero-copy,
.hero-visual {
  padding: 2.3rem;
}

.hero-copy::before,
.hero-visual::before {
  content: "";
  position: absolute;
  width: 22rem;
  height: 22rem;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(99, 204, 229, 0.17), transparent 66%);
  filter: blur(8px);
  pointer-events: none;
}

.hero-copy::before {
  top: -10rem;
  right: -9rem;
}

.hero-visual::before {
  left: -10rem;
  bottom: -10rem;
}

.hero-dek {
  max-width: 60ch;
  margin-top: 1.25rem;
  font-size: 1.04rem;
}

.hero-dek strong {
  color: var(--alert);
  font-weight: 600;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 1.7rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.9rem 1.3rem;
  border: 1px solid transparent;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
}

.button:hover {
  transform: translateY(-1px);
}

.button-primary {
  background: linear-gradient(135deg, #d3f5ff, #75d4ea);
  color: #041018;
  box-shadow: 0 18px 34px rgba(117, 212, 234, 0.22);
}

.button-secondary {
  background: rgba(9, 17, 26, 0.45);
  border-color: rgba(169, 240, 255, 0.22);
}

.signal-note {
  margin-top: 1.25rem;
  padding: 1rem 1.1rem;
  border-radius: var(--radius-md);
  border: 1px solid rgba(169, 240, 255, 0.15);
  background: rgba(8, 17, 24, 0.58);
}

.fact-grid,
.feature-grid,
.benchmark-grid,
.mode-grid,
.use-grid,
.reference-grid {
  display: grid;
  gap: 1rem;
}

.fact-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 1.6rem;
}

.fact-card,
.signal-card,
.feature-card,
.benchmark-card,
.mode-card,
.use-card,
.reference-card {
  padding: 1.35rem;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(163, 228, 247, 0.12);
  background: rgba(8, 17, 25, 0.72);
}

.fact-card dt,
.signal-label,
.metric-name {
  display: block;
  margin-bottom: 0.7rem;
  color: var(--accent);
  font-family: "SFMono-Regular", "Menlo", "Monaco", "Consolas", monospace;
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.fact-card dd {
  margin: 0;
  color: var(--text);
  font-size: 1.08rem;
  line-height: 1.35;
  font-weight: 600;
}

.hero-visual-head p {
  margin-bottom: 0.7rem;
}

.hero-visual-head h2 {
  max-width: 12ch;
  font-size: clamp(1.8rem, 3.2vw, 2.8rem);
}

.signal-stack {
  display: grid;
  gap: 0.9rem;
  margin-top: 1.4rem;
}

.signal-card strong {
  display: block;
  color: var(--text);
  font-size: 1.2rem;
  line-height: 1.25;
}

.signal-card p {
  margin-top: 0.6rem;
}

.track-panel {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.8rem;
  margin-top: 1.4rem;
}

.track-panel span {
  position: relative;
  min-height: 7rem;
  border-radius: 999px;
  border: 1px solid rgba(163, 228, 247, 0.14);
  background:
    linear-gradient(180deg, rgba(169, 240, 255, 0.18), transparent 28%),
    linear-gradient(180deg, rgba(13, 28, 41, 0.95), rgba(8, 14, 21, 0.8));
  overflow: hidden;
}

.track-panel span::after {
  content: "";
  position: absolute;
  left: 23%;
  right: 23%;
  bottom: 0.8rem;
  height: 45%;
  border-radius: 999px;
  background: linear-gradient(180deg, rgba(169, 240, 255, 0), rgba(169, 240, 255, 0.5));
  animation: rise 4.8s ease-in-out infinite;
}

.track-panel span:nth-child(2)::after {
  height: 58%;
  animation-delay: 0.4s;
}

.track-panel span:nth-child(3)::after {
  height: 72%;
  animation-delay: 0.8s;
}

.track-panel span:nth-child(4)::after {
  height: 64%;
  animation-delay: 1.2s;
}

.track-panel span:nth-child(5)::after {
  height: 80%;
  animation-delay: 1.6s;
}

.section-heading {
  display: grid;
  gap: 0.8rem;
  margin-bottom: 1.5rem;
}

.section-heading p:last-child {
  max-width: 66ch;
}

.feature-grid,
.benchmark-grid,
.reference-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.mode-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.use-grid {
  grid-template-columns: 1.1fr 0.9fr;
  margin-top: 1rem;
}

.benchmark-card strong {
  display: block;
  margin-top: 0.2rem;
  color: var(--text);
  font-size: 3rem;
  line-height: 1;
}

.benchmark-card p {
  margin-top: 0.75rem;
}

.use-card ul {
  margin: 1rem 0 0;
  padding-left: 1.2rem;
  color: var(--muted);
}

.use-card li + li {
  margin-top: 0.45rem;
}

.faq-list {
  display: grid;
  gap: 0.85rem;
}

.faq-list details {
  padding: 1.2rem 1.35rem;
}

.faq-list summary {
  cursor: pointer;
  list-style: none;
  color: var(--text);
  font-size: 1.32rem;
}

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

.faq-list p {
  margin-top: 0.75rem;
}

.reference-card {
  display: grid;
  gap: 0.7rem;
  text-decoration: none;
}

.reference-card strong {
  color: var(--text);
  font-size: 1.28rem;
}

.reference-card:hover {
  transform: translateY(-2px);
  border-color: var(--panel-border-strong);
}

.footer {
  margin-top: 4rem;
  padding: 1.2rem 0 0.4rem;
  border-top: 1px solid rgba(163, 228, 247, 0.12);
}

[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 520ms ease, transform 520ms ease;
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes rise {
  0%,
  100% {
    transform: translateY(7%);
    opacity: 0.6;
  }

  50% {
    transform: translateY(-6%);
    opacity: 1;
  }
}

@media (max-width: 1100px) {
  .hero,
  .use-grid,
  .feature-grid,
  .benchmark-grid,
  .reference-grid,
  .mode-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (max-width: 820px) {
  .site-shell {
    width: min(calc(100% - 1rem), var(--max-width));
  }

  .topbar {
    flex-direction: column;
    align-items: stretch;
    padding-top: 0.9rem;
  }

  .brand {
    width: min(100%, 20rem);
  }

  .nav {
    justify-content: flex-start;
  }

  .hero-copy,
  .hero-visual {
    padding: 1.5rem;
  }

  .fact-grid,
  .feature-grid,
  .benchmark-grid,
  .mode-grid,
  .use-grid,
  .reference-grid {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: clamp(2.8rem, 14vw, 4.6rem);
  }

  h2 {
    font-size: clamp(1.8rem, 8vw, 2.8rem);
  }
}

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

  *,
  *::before,
  *::after {
    animation: none !important;
    transition-duration: 0ms !important;
  }

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