:root {
  color-scheme: dark;
  --bg: #070707;
  --panel: #121315;
  --panel-strong: #181a1d;
  --ink: #f7f8f8;
  --muted: #aeb4b8;
  --line: rgba(255, 255, 255, 0.14);
  --red: #f04b4b;
  --amber: #f2b84b;
  --green: #36c878;
  --cyan: #23bdd6;
  --violet: #ba63f2;
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.04), transparent 28rem),
    var(--bg);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
  overflow-x: hidden;
}

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  min-height: 4.25rem;
  padding: 0.75rem clamp(1rem, 4vw, 4rem);
  background: rgba(7, 7, 7, 0.82);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}

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

.brand-logo {
  display: block;
  width: clamp(15.5rem, 27vw, 20rem);
  height: 2.55rem;
  object-fit: contain;
  object-position: left center;
}

nav {
  display: flex;
  align-items: center;
  gap: clamp(0.8rem, 3vw, 2rem);
  color: var(--muted);
  font-size: 0.92rem;
}

nav a,
.nav-menu button {
  text-decoration: none;
}

nav a:hover,
.nav-menu button:hover,
.site-footer a:hover {
  color: var(--ink);
}

.nav-menu {
  position: relative;
}

.nav-menu button {
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  cursor: pointer;
}

.nav-menu-list {
  position: absolute;
  top: calc(100% + 0.7rem);
  right: 0;
  display: grid;
  min-width: 12rem;
  padding: 0.45rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(18, 19, 21, 0.98);
  box-shadow: 0 1rem 2.5rem rgba(0, 0, 0, 0.38);
  opacity: 0;
  pointer-events: none;
  transform: translateY(-0.25rem);
  transition: opacity 140ms ease, transform 140ms ease;
}

.nav-menu:hover .nav-menu-list,
.nav-menu:focus-within .nav-menu-list {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.nav-menu-list a {
  padding: 0.7rem 0.8rem;
  border-radius: 6px;
}

.nav-menu-list a:hover {
  background: rgba(255, 255, 255, 0.07);
}

.hero-section {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(20rem, 1.18fr);
  align-items: center;
  gap: clamp(2rem, 5vw, 5rem);
  min-height: calc(100svh - 4.25rem);
  padding: clamp(2rem, 5vw, 5rem) clamp(1rem, 5vw, 5rem) clamp(3rem, 7vw, 6rem);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.hero-copy {
  max-width: 42rem;
}

.eyebrow {
  margin: 0 0 0.85rem;
  color: var(--cyan);
  font-size: 0.78rem;
  font-weight: 760;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 1rem;
  font-size: clamp(2.65rem, 5.2vw, 6.2rem);
  line-height: 0.95;
  font-weight: 820;
  max-width: 100%;
  overflow-wrap: anywhere;
}

h2 {
  margin-bottom: 1rem;
  font-size: clamp(2.1rem, 5vw, 4.6rem);
  line-height: 1;
  font-weight: 780;
}

h3 {
  margin-bottom: 0.65rem;
  font-size: 1.12rem;
}

.hero-copy > p:not(.eyebrow),
.section-intro p,
.feature-card p,
.benefit-card p,
.tool-list p,
.screenshot-card figcaption {
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.7;
}

.hero-copy > p:not(.eyebrow) {
  max-width: 39rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 2rem;
}

.button,
.file-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.85rem;
  padding: 0 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 720;
  cursor: pointer;
  font: inherit;
}

.button.primary {
  background: var(--ink);
  color: #080808;
}

.button.secondary,
.file-button {
  background: rgba(255, 255, 255, 0.06);
  color: var(--ink);
}

.button:disabled {
  color: rgba(247, 248, 248, 0.42);
  cursor: not-allowed;
  background: rgba(255, 255, 255, 0.025);
}

.hero-visual {
  min-width: 0;
}

.hero-visual img {
  display: block;
  width: 100%;
  max-width: 47rem;
  height: auto;
  margin-left: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 2rem 5rem rgba(0, 0, 0, 0.42);
}

.app-hero-visual img {
  max-width: 56rem;
}

.calibration-section,
.itp-section,
.tools-section,
.screenshots-section,
.roadmap-section,
.download-section {
  padding: clamp(3rem, 7vw, 7rem) clamp(1rem, 5vw, 5rem);
  border-bottom: 1px solid var(--line);
}

.section-intro {
  max-width: 58rem;
  margin-bottom: clamp(2rem, 4vw, 3.5rem);
}

.section-intro.compact {
  max-width: 50rem;
}

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

.feature-card,
.tool-panel,
.tool-list article,
.download-card,
.download-callout {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}

.feature-card {
  min-height: 15rem;
  padding: 1.25rem;
}

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

.benefit-card {
  min-height: 13rem;
  padding: 1.25rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(35, 189, 214, 0.08), rgba(255, 255, 255, 0.025));
}

.benefit-card h3 {
  color: var(--ink);
}

.screenshot-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(18rem, 0.75fr);
  gap: 1rem;
}

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

.screenshot-card {
  display: grid;
  gap: 0.9rem;
  margin: 0;
}

.screenshot-card.large {
  grid-row: span 2;
}

.screenshot-card img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: 0 1.5rem 4rem rgba(0, 0, 0, 0.28);
}

.screenshot-card figcaption {
  margin: 0;
  font-size: 0.95rem;
}

.feature-index,
.tool-list span,
.roadmap-list span,
.download-card span {
  display: inline-block;
  margin-bottom: 2.3rem;
  color: var(--amber);
  font-size: 0.78rem;
  font-weight: 820;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.tools-layout,
.spectral-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(18rem, 0.65fr);
  gap: 1rem;
  align-items: stretch;
}

.tool-panel {
  min-width: 0;
  padding: clamp(1rem, 3vw, 1.5rem);
  background: var(--panel-strong);
}

.tool-panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.spectral-workspace {
  display: grid;
  gap: 1rem;
}

.spectral-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

.tool-panel-header .eyebrow {
  margin-bottom: 0.4rem;
}

.file-button input {
  position: absolute;
  inline-size: 1px;
  block-size: 1px;
  opacity: 0;
  pointer-events: none;
}

.spectral-chart-panel {
  min-height: 100%;
}

.spectral-stats {
  display: grid;
  gap: 0.25rem;
  min-width: 7.5rem;
  text-align: right;
}

.spectral-stats span {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 760;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.spectral-stats strong {
  font-size: 1rem;
}

canvas {
  display: block;
  width: 100%;
  aspect-ratio: 2.23 / 1;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #08090a;
}

.chart-status {
  margin: 0.85rem 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.metadata-panel {
  display: grid;
  align-content: start;
  gap: 0.9rem;
  min-width: 0;
  padding: clamp(1rem, 3vw, 1.5rem);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}

.metadata-panel label {
  display: grid;
  gap: 0.4rem;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 760;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.metadata-panel input {
  width: 100%;
  min-height: 2.45rem;
  padding: 0 0.75rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.055);
  color: var(--ink);
  font: 500 0.95rem Inter, ui-sans-serif, system-ui, sans-serif;
  letter-spacing: 0;
  text-transform: none;
}

.metadata-panel input:focus {
  outline: 2px solid rgba(35, 189, 214, 0.45);
  outline-offset: 2px;
}

.tool-list {
  display: grid;
  gap: 1rem;
}

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

.tool-list article {
  padding: 1.25rem;
}

.tool-list span {
  margin-bottom: 1.2rem;
}

.roadmap-section {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(20rem, 1.18fr);
  gap: clamp(2rem, 6vw, 5rem);
  align-items: start;
}

.roadmap-list {
  display: grid;
  gap: 0.8rem;
  padding: 0;
  margin: 0;
  list-style: none;
}

.roadmap-list li {
  display: grid;
  grid-template-columns: minmax(9rem, 0.35fr) minmax(0, 0.65fr);
  gap: 1rem;
  padding: 1rem 0;
  border-top: 1px solid var(--line);
}

.roadmap-list span {
  margin: 0;
  color: var(--green);
}

.roadmap-list strong {
  font-size: 1.1rem;
  line-height: 1.45;
}

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

.download-card {
  display: grid;
  align-content: start;
  gap: 0.8rem;
  min-height: 18rem;
  padding: 1.25rem;
}

.download-card span {
  margin-bottom: 1.5rem;
  color: var(--green);
}

.download-card p,
.download-callout p {
  color: var(--muted);
  line-height: 1.65;
}

.download-card .button {
  width: fit-content;
  margin-top: auto;
}

.download-callout {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1.25rem;
}

.download-callout p {
  margin-bottom: 0;
}

.placeholder-link {
  opacity: 0.62;
  pointer-events: none;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.35rem clamp(1rem, 5vw, 5rem);
  color: var(--muted);
}

.site-footer span {
  color: var(--ink);
  font-weight: 760;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

@media (max-width: 900px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.8rem;
  }

  .hero-section,
  .tools-layout,
  .spectral-layout,
  .screenshot-grid,
  .screenshot-grid.two-up,
  .roadmap-section,
  .download-grid {
    grid-template-columns: 1fr;
  }

  .hero-section {
    min-height: auto;
  }

  .hero-visual img {
    margin-left: 0;
  }

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

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

  .screenshot-card.large {
    grid-row: auto;
  }

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

@media (max-width: 560px) {
  nav {
    width: 100%;
    justify-content: space-between;
    gap: 0.7rem;
  }

  .brand-logo {
    width: clamp(13.25rem, 62vw, 16rem);
  }

  h1 {
    font-size: clamp(2.65rem, 13vw, 3.15rem);
  }

  .tool-panel-header,
  .roadmap-list li,
  .download-callout {
    grid-template-columns: 1fr;
  }

  .tool-panel-header {
    display: grid;
  }

  .download-callout {
    display: grid;
  }

  .spectral-stats {
    text-align: left;
  }

  .file-button,
  .spectral-toolbar .button {
    width: 100%;
  }

  .spectral-tool-list {
    grid-template-columns: 1fr;
  }

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

  .site-footer {
    flex-direction: column;
  }
}