:root {
  color-scheme: dark;
  --bg: #0b1020;
  --bg-alt: #10162a;
  --panel: rgba(14, 19, 36, 0.88);
  --panel-strong: rgba(20, 27, 49, 0.96);
  --line: rgba(255, 255, 255, 0.09);
  --text: #eef2ff;
  --muted: #a7b0cf;
  --accent: #76e4c2;
  --accent-2: #8ab4ff;
  --warn: #f7c56f;
  --danger: #ff7a8b;
  --shadow: 0 18px 70px rgba(0, 0, 0, 0.35);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 16px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, "Segoe UI", Helvetica, Arial, sans-serif;
  background:
    radial-gradient(circle at top left, rgba(118, 228, 194, 0.12), transparent 24%),
    radial-gradient(circle at top right, rgba(138, 180, 255, 0.16), transparent 28%),
    linear-gradient(180deg, #080b15 0%, #0b1020 44%, #0e1427 100%);
  color: var(--text);
  min-height: 100vh;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 36px 36px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent 95%);
}

.page-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 56px;
}

.hero,
.section,
.hero-panel,
.info-card,
.result-card,
.derived-panel,
.matrix-card {
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.hero {
  display: grid;
  grid-template-columns: 1.7fr 0.9fr;
  gap: 20px;
  padding: 32px;
  margin-bottom: 28px;
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, rgba(22, 30, 58, 0.92), rgba(10, 14, 30, 0.78));
  animation: floatIn 600ms ease both;
}

.hero-copy h1,
.section-heading h2 {
  margin: 0;
  line-height: 1.04;
  letter-spacing: -0.03em;
}

.hero-copy h1 {
  font-size: clamp(2.5rem, 5vw, 4.7rem);
  margin-top: 8px;
}

.lede {
  max-width: 68ch;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.7;
  margin: 18px 0 0;
}

.eyebrow {
  margin: 0;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.74rem;
  font-weight: 700;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 24px;
}

.metric-card,
.info-card,
.result-card,
.derived-panel,
.hero-panel {
  background: var(--panel);
  border-radius: var(--radius-lg);
}

.metric-card {
  padding: 18px;
}

.metric-label {
  display: inline-block;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 8px;
}

.metric-card strong,
.result-card h3 {
  display: block;
  font-size: 1.1rem;
  margin-bottom: 4px;
}

.metric-card small,
.hero-panel li,
.hero-panel p,
.info-card p,
.result-card p,
.note,
.derived-panel,
.probability-item small {
  color: var(--muted);
}

.hero-panel {
  padding: 22px;
}

.hero-panel h2,
.section-heading h2 {
  font-size: clamp(1.5rem, 2.8vw, 2.4rem);
}

.hero-panel ol {
  margin: 18px 0 0;
  padding-left: 18px;
  line-height: 1.7;
}

.note {
  margin-top: 18px;
  padding: 14px 16px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--line);
}

.section {
  border-radius: var(--radius-xl);
  background: var(--panel-strong);
  padding: 28px;
  margin-bottom: 22px;
}

.section-heading {
  margin-bottom: 20px;
}

.section-heading h2 {
  margin-top: 8px;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
}

.info-card {
  padding: 20px;
}

.info-card h3 {
  margin: 0 0 10px;
}

.risk-form {
  display: grid;
  gap: 18px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

label {
  display: grid;
  gap: 8px;
}

label span {
  color: var(--muted);
  font-size: 0.92rem;
}

input,
select,
button {
  font: inherit;
}

input,
select {
  width: 100%;
  appearance: none;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  padding: 14px 16px;
  border-radius: 14px;
  outline: none;
  transition: border-color 160ms ease, transform 160ms ease, background 160ms ease;
}

input:focus,
select:focus {
  border-color: rgba(118, 228, 194, 0.6);
  background: rgba(255, 255, 255, 0.06);
}

.form-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

button {
  border: 0;
  padding: 14px 18px;
  border-radius: 999px;
  font-weight: 700;
  cursor: pointer;
}

.primary-btn {
  color: #06111a;
  background: linear-gradient(135deg, var(--accent), #c7f3e5);
}

.secondary-btn {
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--line);
}

.results-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 14px;
}

.matrix-layout {
  display: grid;
  grid-template-columns: 1.35fr 0.75fr;
  gap: 14px;
  align-items: stretch;
}

.matrix-card {
  padding: 22px;
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at top left, rgba(118, 228, 194, 0.12), transparent 32%),
    radial-gradient(circle at bottom right, rgba(138, 180, 255, 0.12), transparent 28%),
    var(--panel);
}

.matrix-lede {
  max-width: 72ch;
}

.confusion-matrix {
  display: grid;
  gap: 12px;
}

.matrix-grid {
  display: grid;
  grid-template-columns: 108px repeat(3, minmax(0, 1fr));
  gap: 10px;
  align-items: stretch;
}

.matrix-chip,
.matrix-cell,
.matrix-axis {
  border-radius: 16px;
  border: 1px solid var(--line);
}

.matrix-chip,
.matrix-axis {
  background: rgba(255, 255, 255, 0.03);
}

.matrix-chip {
  padding: 14px 16px;
  font-weight: 700;
  color: var(--text);
}

.matrix-axis {
  display: grid;
  place-items: center;
  padding: 14px 16px;
  color: var(--muted);
  text-align: center;
  min-height: 64px;
}

.matrix-axis.header {
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.matrix-axis.corner {
  background: linear-gradient(135deg, rgba(118, 228, 194, 0.12), rgba(138, 180, 255, 0.1));
  color: var(--text);
  font-size: 0.9rem;
}

.matrix-cell {
  padding: 16px;
  min-height: 94px;
  display: grid;
  align-content: space-between;
  gap: 10px;
  background: rgba(255, 255, 255, 0.04);
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.matrix-cell:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.22);
}

.matrix-cell .count {
  font-size: 1.3rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.matrix-cell .share {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.72);
}

.matrix-cell.diagonal {
  border-color: rgba(118, 228, 194, 0.36);
}

.matrix-cell.off-diagonal {
  border-color: rgba(255, 255, 255, 0.08);
}

.matrix-explainer {
  padding: 22px;
}

.definition-list {
  display: grid;
  gap: 10px;
  margin-top: 14px;
}

.definition-list div {
  padding: 14px 16px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
}

.definition-list .label-item {
  border-left-width: 4px;
}

.definition-list .label-item-nai {
  border-left-color: #b2ffd7;
}

.definition-list .label-item-vai {
  border-left-color: #f7d28d;
}

.definition-list .label-item-oai {
  border-left-color: #ff9bb0;
}

.definition-list strong {
  display: block;
  color: var(--text);
  margin-bottom: 4px;
  font-size: 1rem;
}

.definition-list .label-nai {
  color: #b2ffd7 !important;
}

.definition-list .label-vai {
  color: #f7d28d !important;
}

.definition-list .label-oai {
  color: #ff9bb0 !important;
}

.definition-list p,
.matrix-note {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.matrix-note {
  margin-top: 16px;
}

.matrix-summary {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: center;
  margin-top: 14px;
  padding: 16px 18px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
}

.matrix-summary strong {
  color: var(--text);
}

.matrix-summary p {
  margin: 0;
  color: var(--muted);
  text-align: right;
}

.distribution-card {
  margin-top: 14px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at top left, rgba(118, 228, 194, 0.1), transparent 34%),
    radial-gradient(circle at bottom right, rgba(138, 180, 255, 0.1), transparent 30%),
    var(--panel);
  display: grid;
  gap: 18px;
}

.distribution-copy h3 {
  margin: 6px 0 10px;
  font-size: clamp(1.3rem, 2.3vw, 1.8rem);
}

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

.distribution-chart {
  padding: 14px;
  border-radius: 20px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
}

.distribution-chart-frame {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  gap: 14px;
  align-items: stretch;
}

.distribution-chart-scroll {
  display: grid;
  gap: 10px;
  overflow-x: auto;
  padding-bottom: 4px;
}

.distribution-chart-scale {
  display: grid;
  align-content: space-between;
  padding: 12px 0 36px;
  color: var(--muted);
  font-size: 0.78rem;
  font-variant-numeric: tabular-nums;
}

.distribution-chart-scale span {
  display: block;
  transform: translateY(50%);
}

.distribution-chart-body {
  position: relative;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(48px, 1fr);
  gap: 10px;
  min-width: 100%;
  padding: 12px 16px 0;
  border-radius: 18px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.02)),
    repeating-linear-gradient(
      to top,
      rgba(255, 255, 255, 0.08) 0,
      rgba(255, 255, 255, 0.08) 1px,
      transparent 1px,
      transparent 25%
    );
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.03);
}

.distribution-column {
  display: grid;
  align-content: end;
}

.distribution-year-row {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(48px, 1fr);
  gap: 10px;
  min-width: 100%;
  padding: 0 16px;
}

.distribution-bar {
  position: relative;
  height: 320px;
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.03);
  isolation: isolate;
}

.distribution-segment {
  position: absolute;
  left: 0;
  right: 0;
  bottom: calc(var(--offset) * 1%);
  height: calc(var(--share) * 1%);
  display: grid;
  place-items: center;
  color: #06111a;
  font-weight: 800;
  font-size: 0.84rem;
  letter-spacing: -0.01em;
  border-top: 1px solid rgba(255, 255, 255, 0.45);
  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.2);
}

.distribution-segment-nai {
  background: linear-gradient(180deg, rgba(178, 255, 215, 0.98), rgba(165, 245, 205, 0.9));
}

.distribution-segment-vai {
  background: linear-gradient(180deg, rgba(247, 210, 141, 0.98), rgba(242, 198, 123, 0.9));
}

.distribution-segment-oai {
  background: linear-gradient(180deg, rgba(255, 155, 176, 0.98), rgba(250, 133, 158, 0.9));
}

.distribution-segment-label {
  display: inline-block;
}

.distribution-year {
  text-align: center;
  color: var(--text);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.2;
}

.distribution-legend {
  display: grid;
  grid-template-columns: repeat(3, max-content);
  justify-content: center;
  align-items: center;
  column-gap: clamp(14px, 2vw, 24px);
  width: 100%;
  padding: 2px 0 0;
  margin-top: 14px;
  grid-column: 1 / -1;
  justify-self: center;
  max-width: 100%;
}

.distribution-legend-item {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  white-space: nowrap;
  color: var(--muted);
  font-size: 0.92rem;
}

.swatch {
  width: 14px;
  height: 14px;
  border-radius: 999px;
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.03);
}

.swatch.nai {
  background: #b2ffd7;
}

.swatch.vai {
  background: #f7d28d;
}

.swatch.oai {
  background: #ff9bb0;
}

.result-card,
.derived-panel {
  padding: 22px;
}

.result-card.highlight {
  background: linear-gradient(135deg, rgba(118, 228, 194, 0.14), rgba(138, 180, 255, 0.1)), var(--panel);
}

.result-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 0.9rem;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
}

.badge.nai {
  color: #b2ffd7;
}

.badge.vai {
  color: #f7d28d;
}

.badge.oai {
  color: #ff9bb0;
}

.probability-list {
  display: grid;
  gap: 14px;
}

.probability-item {
  display: grid;
  gap: 8px;
}

.probability-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
}

.bar {
  position: relative;
  height: 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  overflow: hidden;
}

.bar > span {
  position: absolute;
  inset: 0 auto 0 0;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--accent-2), var(--accent));
}

.derived-panel {
  margin-top: 14px;
  line-height: 1.7;
}

.derived-panel strong {
  color: var(--text);
}

.hidden {
  display: none;
}

.site-footer {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto 30px;
  padding: 0 4px 18px;
  color: var(--muted);
  text-align: center;
  font-size: 0.92rem;
}

.site-footer p {
  margin: 0;
}

@keyframes floatIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 900px) {
  .hero,
  .results-grid,
  .info-grid,
  .hero-metrics,
  .form-grid,
  .matrix-layout {
    grid-template-columns: 1fr;
  }

  .page-shell {
    width: min(100% - 20px, 1180px);
  }

  .hero {
    padding: 24px;
  }
}

@media (max-width: 560px) {
  .section,
  .hero,
  .info-card,
  .result-card,
  .hero-panel,
  .derived-panel {
    border-radius: 18px;
  }

  .hero-copy h1 {
    font-size: 2.35rem;
  }

  .matrix-grid {
    grid-template-columns: 86px repeat(3, minmax(0, 1fr));
    gap: 8px;
  }

  .matrix-cell,
  .matrix-axis {
    padding: 12px;
    min-height: 76px;
  }

  .matrix-summary {
    flex-direction: column;
    align-items: flex-start;
  }

  .matrix-summary p {
    text-align: left;
  }

  .distribution-card {
    padding: 18px;
  }

  .distribution-chart-frame {
    grid-template-columns: 1fr;
  }

  .distribution-chart-scale {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    display: grid;
    gap: 8px;
    padding: 0 2px 4px;
  }

  .distribution-chart-scale span {
    transform: none;
    text-align: center;
  }

  .distribution-chart-body {
    padding-bottom: 0;
  }

  .distribution-year-row {
    grid-auto-columns: minmax(48px, 1fr);
    gap: 8px;
    padding: 0 2px;
  }

  .distribution-bar {
    height: 260px;
  }
}