:root {
  color-scheme: dark;
  --bg: #050817;
  --bg-2: #071226;
  --panel: rgba(9, 18, 39, 0.86);
  --panel-strong: #0b1630;
  --text: #f8fbff;
  --muted: #b7c3d7;
  --line: rgba(67, 144, 255, 0.34);
  --blue: #21a8ff;
  --cyan: #20d4ff;
  --violet: #8b45ff;
  --magenta: #cc4fff;
  --green: #24d09c;
  --gold: #d9a441;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.36);
}

[data-theme="light"] {
  color-scheme: light;
  --bg: #f7fbff;
  --bg-2: #edf5ff;
  --panel: rgba(255, 255, 255, 0.9);
  --panel-strong: #ffffff;
  --text: #081538;
  --muted: #40506b;
  --line: rgba(36, 102, 255, 0.24);
  --blue: #0b77ff;
  --cyan: #0896c9;
  --violet: #6d36ff;
  --magenta: #a93cff;
  --green: #047a5f;
  --gold: #a97814;
  --shadow: 0 24px 70px rgba(58, 93, 140, 0.18);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 80% 12%, rgba(121, 58, 255, 0.2), transparent 30rem),
    radial-gradient(circle at 12% 36%, rgba(30, 168, 255, 0.16), transparent 34rem),
    linear-gradient(135deg, var(--bg), var(--bg-2));
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  min-height: 100vh;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(80, 160, 255, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(80, 160, 255, 0.07) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(to bottom, #000, transparent 82%);
}

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

:focus-visible {
  outline: 3px solid var(--cyan);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  left: 1rem;
  top: 1rem;
  z-index: 100;
  transform: translateY(-160%);
  background: var(--panel-strong);
  border: 1px solid var(--cyan);
  border-radius: 0.5rem;
  padding: 0.75rem 1rem;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 5rem;
  padding: 0.85rem clamp(1rem, 4vw, 3rem);
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  min-width: 12rem;
}

.brand img {
  width: 3.1rem;
  height: 3.1rem;
  object-fit: cover;
  border-radius: 0.75rem;
  border: 1px solid var(--line);
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 1.05rem;
  letter-spacing: 0.01em;
}

.brand small {
  color: var(--muted);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.13em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.site-nav a,
.menu-button,
.utility-dock button,
.support-button {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.035);
  color: var(--text);
  border-radius: 999px;
  font: inherit;
  font-size: 0.86rem;
  font-weight: 800;
  padding: 0.74rem 1rem;
  cursor: pointer;
}

.site-nav a:hover,
.utility-dock button:hover,
.support-button:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}

.site-nav .source-link,
.support-button,
.button.primary {
  background: linear-gradient(135deg, var(--blue), var(--violet));
  border-color: color-mix(in srgb, var(--cyan) 60%, var(--violet));
  color: white;
}

.menu-button {
  display: none;
}

.section-band {
  position: relative;
  width: min(100%, 1440px);
  margin: 0 auto;
  padding: clamp(3rem, 7vw, 6rem) clamp(1rem, 4vw, 3rem);
}

.hero {
  display: grid;
  grid-template-columns: minmax(22rem, 0.82fr) minmax(34rem, 1.18fr);
  gap: clamp(2rem, 4vw, 4rem);
  align-items: center;
  min-height: calc(100vh - 5rem);
}

.eyebrow {
  display: inline-flex;
  width: fit-content;
  margin: 0 0 1.2rem;
  padding: 0.45rem 0.75rem;
  border: 1px solid color-mix(in srgb, var(--gold) 55%, var(--line));
  border-radius: 0.45rem;
  color: var(--gold);
  background: rgba(217, 164, 65, 0.08);
  font-size: 0.76rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 1.3rem;
  max-width: 12ch;
  font-size: clamp(3.6rem, 6.1vw, 6.7rem);
  line-height: 0.94;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 1rem;
  font-size: clamp(2rem, 4vw, 4rem);
  line-height: 1;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 0.7rem;
  font-size: 1.25rem;
}

.lead,
.section-heading p,
.surface-card p,
.boundary-grid p,
.risk-panel p,
.step-card p,
.contract-panel p {
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.7;
}

.lead {
  max-width: 45rem;
  font-size: clamp(1.15rem, 2vw, 1.45rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin: 2rem 0;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.2rem;
  padding: 0.95rem 1.15rem;
  border: 1px solid var(--line);
  border-radius: 0.55rem;
  font-weight: 900;
}

.button.secondary {
  background: rgba(32, 212, 255, 0.08);
  color: var(--cyan);
}

.button.ghost {
  color: var(--text);
  background: rgba(255, 255, 255, 0.03);
}

.status-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.7rem;
  margin: 0;
}

.status-strip div,
.panel,
.step-card,
.surface-card,
.contract-panel,
.boundary-grid article {
  border: 1px solid var(--line);
  border-radius: 0.75rem;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.status-strip div {
  padding: 0.9rem;
}

.status-strip dt {
  color: var(--muted);
  font-size: 0.69rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.status-strip dd {
  margin: 0.25rem 0 0;
  font-weight: 900;
}

.hero-visual {
  position: relative;
  border: 1px solid var(--line);
  border-radius: 1rem;
  overflow: hidden;
  background: #030713;
  box-shadow: var(--shadow);
}

.hero-visual img {
  display: block;
  width: 100%;
  height: auto;
  min-height: 32rem;
  object-fit: cover;
  object-position: top center;
}

.visual-caption {
  position: absolute;
  left: 1rem;
  right: 1rem;
  bottom: 1rem;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 1rem;
  border: 1px solid var(--line);
  border-radius: 0.6rem;
  background: rgba(3, 7, 19, 0.8);
  color: white;
  backdrop-filter: blur(14px);
  font-size: 0.85rem;
}

.section-heading {
  max-width: 56rem;
  margin-bottom: 2rem;
}

.section-heading.compact {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}

.analyzer-grid,
.surface-grid,
.boundary-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.panel,
.step-card,
.surface-card,
.boundary-grid article {
  padding: 1.2rem;
}

.panel-top {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.panel-top strong {
  color: var(--cyan);
}

.waveform {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  height: 12rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 0.65rem;
  background: linear-gradient(180deg, rgba(33, 168, 255, 0.1), rgba(139, 69, 255, 0.06));
}

.waveform span {
  flex: 1;
  min-width: 0.35rem;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--cyan), var(--violet));
}

.metric-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.55rem;
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
}

.metric-row li {
  border: 1px solid var(--line);
  border-radius: 0.55rem;
  padding: 0.7rem;
}

.metric-row b,
.metric-row span {
  display: block;
}

.metric-row span {
  color: var(--muted);
  font-size: 0.78rem;
}

.spectrogram {
  height: 12rem;
  border: 1px solid var(--line);
  border-radius: 0.65rem;
  background:
    radial-gradient(circle at 12% 70%, rgba(32, 212, 255, 0.85), transparent 0.9rem),
    radial-gradient(circle at 32% 42%, rgba(139, 69, 255, 0.9), transparent 1.1rem),
    radial-gradient(circle at 58% 60%, rgba(204, 79, 255, 0.9), transparent 1.2rem),
    radial-gradient(circle at 78% 34%, rgba(32, 212, 255, 0.85), transparent 0.9rem),
    repeating-linear-gradient(90deg, rgba(255,255,255,0.08) 0 2px, transparent 2px 9px),
    linear-gradient(180deg, rgba(32, 212, 255, 0.12), rgba(139, 69, 255, 0.14));
}

.feature-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 1rem;
}

.feature-tags span,
.surface-card li,
.contract-panel code,
.step-card code {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.45rem 0.65rem;
  color: var(--cyan);
  background: rgba(32, 212, 255, 0.06);
  font-size: 0.82rem;
  font-weight: 800;
}

.risk-meter {
  display: grid;
  place-items: center;
  height: 12rem;
  margin-bottom: 1rem;
  border: 1px solid var(--line);
  border-radius: 0.65rem;
  background: radial-gradient(circle, rgba(36, 208, 156, 0.18), rgba(139, 69, 255, 0.08));
}

.risk-meter div {
  width: 7.5rem;
  aspect-ratio: 1;
  border-radius: 50%;
  background:
    radial-gradient(circle, var(--panel-strong) 54%, transparent 55%),
    conic-gradient(var(--green), var(--cyan), var(--violet), rgba(255,255,255,0.08) 72%);
}

.risk-meter strong {
  margin-top: -4.8rem;
}

.step-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}

.step-number {
  display: grid;
  place-items: center;
  width: 2.7rem;
  height: 2.7rem;
  margin-bottom: 1.2rem;
  border-radius: 50%;
  border: 1px solid var(--cyan);
  color: var(--cyan);
  font-weight: 900;
}

.step-card code,
.contract-panel code {
  display: block;
  width: fit-content;
  border-radius: 0.45rem;
  margin-top: 0.7rem;
  font-family: "Cascadia Code", Consolas, monospace;
}

.surface-card ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0;
  margin: 1rem 0 0;
  list-style: none;
}

.contract-panel {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  padding: 1.2rem;
}

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

.utility-dock {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  z-index: 25;
  display: grid;
  justify-items: end;
  gap: 0.5rem;
  pointer-events: none;
}

.utility-dock > * {
  pointer-events: auto;
}

.utility-dock button,
.support-button {
  min-width: 8.8rem;
  min-height: 2.65rem;
  box-shadow: 0 12px 34px rgba(0, 0, 0, 0.28);
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem 2rem;
  padding: 2rem clamp(1rem, 4vw, 3rem) 7rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.site-footer a {
  color: var(--cyan);
  font-weight: 800;
}

.access-mode {
  letter-spacing: 0;
}

.access-mode * {
  transition-duration: 0ms !important;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}

@media (max-width: 1120px) {
  .hero,
  .analyzer-grid,
  .surface-grid,
  .contract-panel {
    grid-template-columns: 1fr;
  }

  h1 {
    max-width: 13ch;
    font-size: clamp(3.4rem, 10vw, 6rem);
  }

  .hero-visual img {
    max-height: 48rem;
  }

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

@media (max-width: 760px) {
  .site-header {
    align-items: flex-start;
  }

  .menu-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .site-nav {
    position: absolute;
    left: 1rem;
    right: 1rem;
    top: calc(100% + 0.5rem);
    display: none;
    justify-content: flex-start;
    padding: 0.8rem;
    border: 1px solid var(--line);
    border-radius: 0.75rem;
    background: var(--panel-strong);
    box-shadow: var(--shadow);
  }

  .site-nav.is-open {
    display: flex;
  }

  .brand {
    min-width: 0;
  }

  .brand img {
    width: 2.6rem;
    height: 2.6rem;
  }

  h1 {
    max-width: 10.5ch;
    font-size: clamp(3.1rem, 16vw, 5.2rem);
  }

  .section-band {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .status-strip,
  .boundary-grid,
  .step-grid,
  .metric-row {
    grid-template-columns: 1fr;
  }

  .hero-visual img {
    min-height: 22rem;
  }

  .visual-caption {
    position: static;
    border-left: 0;
    border-right: 0;
    border-bottom: 0;
    border-radius: 0;
  }

  .utility-dock {
    right: 0.75rem;
    bottom: 0.75rem;
    gap: 0.4rem;
  }

  .utility-dock button,
  .support-button {
    min-width: 7.8rem;
    min-height: 2.4rem;
    font-size: 0.75rem;
    padding: 0.55rem 0.7rem;
  }
}