:root {
  color-scheme: light;
  --ink: #1d1820;
  --muted: #685f6d;
  --paper: #fff8ee;
  --panel: #ffffff;
  --line: #ded3c2;
  --orange: #e8572f;
  --red: #b91c36;
  --gold: #f0b437;
  --blue: #234e70;
  --green: #37735f;
  --violet: #6b4aa3;
  --shadow: 0 18px 42px rgba(45, 29, 20, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
}

a {
  color: inherit;
}

.hero {
  min-height: 92vh;
  background:
    radial-gradient(circle at 15% 15%, rgba(240, 180, 55, 0.24), transparent 30%),
    linear-gradient(120deg, #fff4df 0%, #ffe0c6 46%, #f6aa7b 100%);
  border-bottom: 1px solid rgba(29, 24, 32, 0.15);
  overflow: hidden;
}

.topbar {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 6px;
  flex-wrap: wrap;
}

.topbar a {
  text-decoration: none;
  font-size: 0.86rem;
  font-weight: 700;
  padding: 8px 11px;
  border-radius: 999px;
}

.topbar a:hover,
.topbar a:focus-visible {
  background: rgba(255, 255, 255, 0.62);
  outline: none;
}

.hero-grid {
  width: min(1180px, calc(100% - 32px));
  min-height: calc(92vh - 64px);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(340px, 1.08fr);
  gap: 34px;
  align-items: center;
  padding: 26px 0 80px;
}

.hero-copy {
  max-width: 640px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--red);
  font-size: 0.77rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  margin: 0;
  font-size: clamp(3.2rem, 8vw, 6.8rem);
  line-height: 0.92;
  letter-spacing: 0;
}

h2 {
  margin: 0 0 16px;
  max-width: 900px;
  font-size: clamp(2rem, 4.6vw, 4.15rem);
  line-height: 1;
  letter-spacing: 0;
}

h3 {
  margin: 0 0 9px;
  font-size: 1.08rem;
  line-height: 1.2;
}

.lead {
  margin: 24px 0 0;
  max-width: 58ch;
  color: #332735;
  font-size: clamp(1.08rem, 2.1vw, 1.35rem);
}

.quick-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.quick-facts span {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  border: 1px solid rgba(29, 24, 32, 0.16);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.5);
  padding: 8px 13px;
  font-size: 0.92rem;
  font-weight: 800;
}

.hero-visual {
  min-height: 360px;
}

canvas {
  display: block;
  width: 100%;
  height: auto;
}

.band {
  padding: 86px 0;
  background: var(--paper);
}

.band:nth-of-type(even) {
  background: #f7efe4;
}

.content {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}

.two-column {
  display: grid;
  grid-template-columns: minmax(0, 0.86fr) minmax(320px, 1fr);
  gap: 42px;
  align-items: center;
}

.definition-list {
  display: grid;
  gap: 13px;
}

.definition-list div,
.control-panel,
.wave-stage,
.property-grid article,
.timeline article,
.cards article {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.72);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.8) inset;
}

.definition-list div {
  padding: 20px;
}

.definition-list strong,
.definition-list span {
  display: block;
}

.definition-list span {
  margin-top: 5px;
  color: var(--muted);
}

.spectrum {
  display: grid;
  grid-template-columns: 1.15fr 1fr 0.9fr 0.54fr 0.74fr 0.62fr 0.58fr;
  min-height: 96px;
  overflow: hidden;
  border-radius: 8px;
  border: 1px solid rgba(29, 24, 32, 0.2);
  box-shadow: var(--shadow);
}

.spectrum span {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 14px 8px;
  color: white;
  text-align: center;
  font-weight: 900;
  font-size: clamp(0.72rem, 1.8vw, 1rem);
}

.radio { background: #295b47; }
.micro { background: #2f6f83; }
.ir { background: linear-gradient(90deg, #8f2f25, #e84f2a, #f3a12f); }
.visible { background: linear-gradient(90deg, #6a3fb1, #2d72d9, #22a35a, #f0d03a, #ef4b37); }
.uv { background: #6046a7; }
.xray { background: #3f4f63; }
.gamma { background: #19171c; }

.spectrum .active {
  box-shadow: inset 0 0 0 4px rgba(255, 255, 255, 0.78);
}

.spectrum-labels {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 14px;
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 750;
}

.simulator {
  display: grid;
  grid-template-columns: minmax(290px, 360px) minmax(0, 1fr);
  gap: 18px;
  align-items: stretch;
}

.control-panel,
.wave-stage {
  padding: 22px;
}

.control-panel label,
.temp-control {
  display: block;
  margin-bottom: 12px;
  font-size: 0.92rem;
  font-weight: 900;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--orange);
}

.range-row,
.wave-caption,
.temp-readout {
  color: var(--muted);
  font-size: 0.92rem;
}

.generated-figure {
  margin: 24px 0 0;
}

.generated-figure img {
  display: block;
  width: min(100%, 520px);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.26);
}

.generated-figure figcaption {
  max-width: 520px;
  margin-top: 8px;
  color: #ffe0c7;
  font-size: 0.86rem;
}

.range-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 6px;
}

.readouts {
  display: grid;
  gap: 10px;
  margin-top: 22px;
}

.readouts div {
  border-left: 4px solid var(--orange);
  background: #fff7ec;
  padding: 10px 12px;
}

.metric-label {
  display: block;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
}

.readouts strong {
  display: block;
  margin-top: 2px;
  font-size: 1.08rem;
}

.wave-stage {
  background: #17151a;
  color: white;
}

.wave-caption {
  color: #f6d7c1;
  min-height: 44px;
  margin-top: 10px;
}

.property-grid,
.cards {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 18px;
}

.property-grid article,
.cards article {
  padding: 20px;
}

.property-grid p,
.cards p,
.timeline p {
  margin: 0;
  color: var(--muted);
}

.thermal-section {
  background: #18202a;
  color: white;
}

.thermal-section .eyebrow,
.thermal-section p,
.thermal-section .temp-readout {
  color: #ffe0c7;
}

.thermal-demo {
  display: grid;
  grid-template-columns: 1fr 24px;
  gap: 14px;
  align-items: stretch;
  min-height: 360px;
}

.thermal-screen {
  position: relative;
  overflow: hidden;
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.08), transparent 36%),
    repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.04) 0 1px, transparent 1px 7px),
    #091018;
  border: 1px solid rgba(255, 255, 255, 0.14);
}

.thermal-object {
  position: absolute;
  left: 50%;
  top: 50%;
  width: min(44%, 230px);
  aspect-ratio: 1;
  border-radius: 50%;
  transform: translate(-50%, -54%);
  background: radial-gradient(circle at 42% 32%, #fff9a7, #ff9c35 26%, #e9233d 52%, #5425a8 78%, #13143a 100%);
  box-shadow: 0 0 45px rgba(255, 90, 40, 0.72);
}

.thermal-shadow {
  position: absolute;
  left: 23%;
  right: 23%;
  bottom: 18%;
  height: 26px;
  border-radius: 50%;
  background: rgba(47, 30, 94, 0.5);
  filter: blur(12px);
}

.color-scale {
  border-radius: 8px;
  background: linear-gradient(0deg, #101033, #5128a0, #e9233d, #ff9c35, #fff9a7);
  border: 1px solid rgba(255, 255, 255, 0.14);
}

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

.timeline article {
  padding: 22px;
}

.timeline span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  margin-bottom: 18px;
  border-radius: 50%;
  background: var(--blue);
  color: white;
  font-weight: 900;
}

.risks {
  background: #fff1e4;
}

.risks .cards article {
  border-color: rgba(185, 28, 54, 0.23);
}

.light {
  background: #ffffff;
}

.references {
  display: grid;
  gap: 10px;
  margin: 0;
  padding-left: 20px;
}

.references a {
  color: var(--blue);
  font-weight: 800;
}

footer {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  color: var(--muted);
  font-weight: 800;
}

footer a {
  color: var(--red);
  text-decoration: none;
}

@media (max-width: 900px) {
  .hero-grid,
  .two-column,
  .simulator {
    grid-template-columns: 1fr;
  }

  .hero-grid {
    padding-bottom: 52px;
  }

  .topbar {
    justify-content: flex-start;
    padding: 10px 0;
  }

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

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

  .spectrum span {
    min-height: 44px;
  }
}

@media (max-width: 580px) {
  .band {
    padding: 58px 0;
  }

  .property-grid,
  .cards,
  .timeline {
    grid-template-columns: 1fr;
  }

  .quick-facts span {
    width: 100%;
  }

  .thermal-demo {
    min-height: 280px;
  }

  footer {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
  }
}