:root {
  --bg: #041019;
  --bg-deep: #02080e;
  --surface: rgba(10, 24, 36, 0.82);
  --surface-strong: rgba(12, 30, 45, 0.94);
  --surface-soft: rgba(16, 37, 55, 0.72);
  --text: #ebf5ff;
  --muted: #8ba6b8;
  --border: rgba(118, 154, 184, 0.2);
  --border-strong: rgba(163, 212, 255, 0.24);
  --accent: #8af7cf;
  --accent-strong: #45ddb7;
  --accent-2: #6db9ff;
  --accent-3: #ffd27b;
  --danger: #ff8e83;
  --shadow: 0 34px 90px rgba(0, 0, 0, 0.42);
  --radius-xl: 2rem;
  --radius-lg: 1.5rem;
  --radius-md: 1.1rem;
  --max-width: 1240px;
  --display: "Space Grotesk", sans-serif;
  --mono: "IBM Plex Mono", monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--text);
  font-family: var(--display);
  background:
    radial-gradient(circle at top left, rgba(69, 221, 183, 0.18), transparent 26%),
    radial-gradient(circle at 88% 12%, rgba(109, 185, 255, 0.16), transparent 24%),
    radial-gradient(circle at 70% 80%, rgba(255, 210, 123, 0.1), transparent 28%),
    linear-gradient(180deg, #071722 0%, #05111a 45%, #02080e 100%);
}

body::before,
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
}

body::before {
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.024) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 92%);
}

body::after {
  background:
    radial-gradient(circle at 18% 18%, rgba(255, 255, 255, 0.12) 0 1px, transparent 1.5px),
    radial-gradient(circle at 82% 24%, rgba(255, 255, 255, 0.1) 0 1.2px, transparent 1.5px),
    radial-gradient(circle at 70% 64%, rgba(255, 255, 255, 0.06) 0 1px, transparent 1.2px),
    radial-gradient(circle at 16% 70%, rgba(255, 255, 255, 0.08) 0 1px, transparent 1.4px);
}

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

a {
  color: inherit;
}

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

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  z-index: 30;
  padding: 0.85rem 1.1rem;
  border-radius: 999px;
  background: #fff;
  color: #000;
  text-decoration: none;
}

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

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

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.15rem 0;
}

.topbar.is-scrolled {
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
  min-width: 0;
  text-decoration: none;
}

.brand img {
  width: 3.35rem;
  height: 3.35rem;
  flex: 0 0 auto;
}

.brand-copy {
  display: flex;
  flex-direction: column;
  min-width: 0;
  gap: 0.1rem;
}

.brand-copy strong {
  font-size: 1rem;
  letter-spacing: 0.02em;
}

.brand-copy span:last-child {
  color: var(--muted);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.nav a {
  padding: 0.72rem 0.95rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  text-decoration: none;
  color: var(--muted);
  background: rgba(6, 17, 27, 0.48);
}

.nav a:hover,
.nav a[aria-current="true"] {
  color: var(--text);
  border-color: rgba(138, 247, 207, 0.4);
  background: rgba(8, 23, 35, 0.72);
}

.section {
  margin-top: 4.75rem;
}

.section-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(340px, 0.95fr);
  gap: 1.6rem;
  align-items: stretch;
}

.panel {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  background:
    linear-gradient(180deg, rgba(13, 31, 47, 0.88), rgba(7, 18, 28, 0.96)),
    linear-gradient(120deg, rgba(138, 247, 207, 0.04), transparent 40%);
  box-shadow: var(--shadow);
}

.panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.04), transparent 45%);
  pointer-events: none;
}

.hero-copy {
  padding: 2.6rem;
}

.hero-copy::after {
  content: "";
  position: absolute;
  width: 18rem;
  height: 18rem;
  right: -7rem;
  top: -7rem;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(138, 247, 207, 0.22), transparent 68%);
}

.eyebrow,
.mini-label {
  margin: 0 0 0.9rem;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  font-weight: 700;
  line-height: 1.02;
}

h1 {
  max-width: 14ch;
  font-size: clamp(3rem, 5vw, 5.15rem);
}

h2 {
  max-width: 16ch;
  font-size: clamp(2rem, 3.1vw, 3.2rem);
}

h3 {
  font-size: 1.22rem;
}

p {
  margin: 0;
  color: var(--muted);
  line-height: 1.72;
  font-size: 1rem;
}

.hero-dek {
  margin-top: 1.35rem;
  max-width: 60ch;
  font-size: 1.08rem;
}

.hero-actions,
.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 1.6rem;
}

.hero-note {
  margin-top: 1.2rem;
  max-width: 58ch;
  font-size: 0.95rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.2rem;
  padding: 0.85rem 1.25rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 500;
  text-decoration: none;
}

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

.button-primary {
  color: #02110d;
  background: linear-gradient(135deg, var(--accent), #c9ffe9);
}

.button-secondary,
.button-ghost {
  color: var(--text);
  background: rgba(8, 23, 35, 0.62);
  border-color: rgba(138, 247, 207, 0.18);
}

.button-secondary:hover,
.button-ghost:hover {
  border-color: rgba(138, 247, 207, 0.42);
}

.button.compact {
  min-height: 2.85rem;
  padding-inline: 1rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem;
  margin-top: 2rem;
}

.stat-card {
  padding: 1rem 1.05rem 1.15rem;
  border-radius: var(--radius-md);
  background: rgba(7, 20, 31, 0.72);
  border: 1px solid rgba(138, 247, 207, 0.11);
}

.stat-card dt {
  font-family: var(--mono);
  font-size: 0.73rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.stat-card dd {
  margin: 0.55rem 0 0;
  color: var(--text);
  font-size: 1.05rem;
  line-height: 1.4;
}

.hero-visual {
  padding: 1.6rem;
}

.visual-stack {
  display: grid;
  gap: 1rem;
  height: 100%;
}

.scan-card,
.flow-card,
.signal-bar,
.diagram {
  border-radius: var(--radius-lg);
  background: rgba(7, 20, 31, 0.76);
  border: 1px solid rgba(163, 212, 255, 0.12);
}

.scan-card,
.flow-card {
  padding: 1.15rem;
}

.code-window {
  margin-top: 0.9rem;
  padding: 1.05rem;
  border-radius: 1rem;
  background: linear-gradient(180deg, rgba(2, 11, 17, 0.92), rgba(6, 18, 28, 0.92));
  border: 1px solid rgba(163, 212, 255, 0.1);
  color: var(--text);
  font-family: var(--mono);
  line-height: 1.8;
}

.masked {
  display: inline-flex;
  margin: 0.15rem 0.08rem;
  padding: 0.08rem 0.45rem;
  border-radius: 999px;
  color: #041019;
  font-size: 0.92rem;
}

.span-email {
  background: #8af7cf;
}

.span-phone {
  background: #85b8ff;
}

.span-secret {
  background: #ffd27b;
}

.flow-card {
  display: grid;
  gap: 0.75rem;
}

.flow-step {
  display: grid;
  grid-template-columns: 2.3rem 1fr;
  gap: 0.85rem;
  align-items: start;
}

.flow-step span,
.step-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.3rem;
  height: 2.3rem;
  border-radius: 0.9rem;
  background: linear-gradient(140deg, rgba(138, 247, 207, 0.2), rgba(109, 185, 255, 0.2));
  border: 1px solid rgba(138, 247, 207, 0.2);
  color: var(--text);
  font-family: var(--mono);
  font-size: 0.8rem;
}

.flow-step p {
  color: var(--text);
}

.signal-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.15rem;
}

.signal-bar strong {
  display: block;
  max-width: 28ch;
  margin-top: 0.25rem;
  line-height: 1.4;
}

.signal-pill {
  flex: 0 0 auto;
  padding: 0.5rem 0.8rem;
  border-radius: 999px;
  background: rgba(138, 247, 207, 0.12);
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.73rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.section-heading {
  display: grid;
  gap: 0.7rem;
  margin-bottom: 1.45rem;
}

.section-heading p {
  max-width: 65ch;
}

.card-grid,
.modes-grid,
.taxonomy-grid,
.timeline-grid {
  display: grid;
  gap: 1rem;
}

.features-grid,
.risks-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.feature-card,
.risk-card,
.taxonomy-card,
.mode-card,
.timeline-card,
.contact-shell {
  padding: 1.35rem;
}

.feature-card h3,
.risk-card h3,
.taxonomy-card h3,
.mode-card h3,
.timeline-card h3 {
  margin-top: 0.35rem;
  margin-bottom: 0.75rem;
}

.split-section {
  display: grid;
  gap: 1rem;
}

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

.diagram {
  display: grid;
  gap: 0.85rem;
  padding: 1.4rem;
}

.diagram-line {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  align-items: center;
  color: var(--text);
  font-family: var(--mono);
}

.diagram-arrow {
  width: 3.5rem;
  height: 1px;
  background: linear-gradient(90deg, rgba(138, 247, 207, 0.3), rgba(109, 185, 255, 0.85));
}

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

.taxonomy-card {
  min-height: 13.25rem;
}

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

pre {
  margin: 1rem 0;
  overflow-x: auto;
  padding: 1rem;
  border-radius: 1rem;
  background: rgba(2, 11, 17, 0.92);
  border: 1px solid rgba(163, 212, 255, 0.1);
}

code {
  font-family: var(--mono);
  font-size: 0.93rem;
  color: #d2ecff;
}

.faq-list {
  display: grid;
  gap: 0.9rem;
}

.faq-list details {
  padding: 0 1.2rem;
}

.faq-list summary {
  list-style: none;
  cursor: pointer;
  padding: 1.2rem 0;
  font-weight: 500;
  color: var(--text);
}

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

.faq-list details p {
  padding-bottom: 1.2rem;
  max-width: 72ch;
}

.contact-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1rem;
  align-items: center;
  padding: 1.75rem;
}

.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 4rem;
  padding: 1rem 0 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer strong {
  display: block;
  margin-bottom: 0.4rem;
}

.footer p {
  max-width: 56ch;
  font-size: 0.95rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.85rem;
}

.footer-links a {
  text-decoration: none;
  color: var(--muted);
}

.footer-links a:hover {
  color: var(--text);
}

.has-js [data-reveal] {
  opacity: 0;
  transform: translateY(24px);
}

.has-js [data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
  transition:
    opacity 480ms ease,
    transform 480ms ease;
}

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

  .has-js [data-reveal],
  .has-js [data-reveal].is-visible,
  button,
  a,
  summary {
    transition: none;
    transform: none;
    opacity: 1;
  }
}

@media (max-width: 1120px) {
  .section-grid,
  .contact-shell,
  .features-grid,
  .taxonomy-grid,
  .modes-grid,
  .timeline-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .contact-shell {
    align-items: start;
  }

  .topbar {
    flex-wrap: wrap;
  }

  .nav {
    order: 3;
    width: 100%;
    justify-content: flex-start;
  }
}

@media (max-width: 760px) {
  .page-shell {
    width: min(var(--max-width), calc(100% - 1rem));
  }

  .topbar {
    gap: 0.75rem;
  }

  .brand {
    width: 100%;
  }

  .nav,
  .section-grid,
  .features-grid,
  .taxonomy-grid,
  .modes-grid,
  .timeline-grid,
  .stats-grid,
  .contact-shell {
    grid-template-columns: 1fr;
  }

  .nav {
    gap: 0.45rem;
  }

  .nav a,
  .button.compact {
    width: 100%;
  }

  .hero-copy,
  .hero-visual,
  .feature-card,
  .risk-card,
  .taxonomy-card,
  .mode-card,
  .timeline-card,
  .contact-shell {
    padding: 1.2rem;
  }

  h1 {
    max-width: 11ch;
    font-size: clamp(2.4rem, 12vw, 3.75rem);
  }

  h2 {
    max-width: 12ch;
    font-size: clamp(1.8rem, 8vw, 2.6rem);
  }

  .signal-bar,
  .hero-actions,
  .contact-actions,
  .footer {
    flex-direction: column;
    align-items: stretch;
  }

  .signal-pill {
    align-self: flex-start;
  }

  .footer-links {
    justify-content: flex-start;
  }
}