:root {
  color-scheme: light;
  --bg: #ffffff;
  --panel: #f6f8f7;
  --ink: #171b1a;
  --muted: #5f6866;
  --line: #d9e0dd;
  --field: #ffffff;
  --accent: #006b5f;
  --accent-strong: #004c45;
  --accent-soft: #d7eee7;
  --warning: #9b2f2f;
  font-family: Aptos, Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
}

button,
input,
select {
  font: inherit;
}

.view[hidden] {
  display: none;
}

.landing-view {
  min-height: 100vh;
  display: grid;
  align-content: start;
  justify-items: center;
  padding-top: 10vh;
  background: #ffffff;
}

.landing-view h1 {
  margin: 0 0 14px;
  color: #151515;
  font-size: clamp(1.75rem, 4.2vw, 3.35rem);
  font-weight: 650;
  letter-spacing: 0;
}

.landing-motto {
  margin: 0 0 34px;
  color: #151515;
  font-size: clamp(1.08rem, 1.7vw, 1.32rem);
  line-height: 1.4;
  text-align: center;
}

.landing-callout {
  padding: 20px;
  text-align: left;
}

.landing-callout h2 {
  margin: 0 0 14px;
  font-size: clamp(1.35rem, 2.5vw, 2.1rem);
  line-height: 1.15;
}

.landing-callout p,
.landing-callout li {
  color: var(--muted);
  font-size: clamp(0.96rem, 1.25vw, 1.05rem);
  line-height: 1.6;
}

.landing-callout p {
  margin: 0 0 14px;
}

.landing-callout ol {
  display: grid;
  gap: 8px;
  margin: 0 0 16px;
  padding-left: 22px;
}

.landing-final-claim {
  margin-bottom: 0;
  color: var(--ink);
  font-size: clamp(1.02rem, 1.4vw, 1.16rem);
}

.contact-panel {
  margin-top: 24px;
  border-top: 1px solid var(--line);
  padding-top: 18px;
}

.contact-panel h3 {
  margin: 0 0 8px;
  font-size: 1rem;
}

.contact-panel p {
  margin: 0;
}

.contact-panel a {
  color: var(--accent);
  font-weight: 700;
  overflow-wrap: anywhere;
}

.landing-link {
  width: min(92%, 760px);
  margin: 0 0 42px;
  border: 0;
  background: transparent;
  color: #151515;
  font-size: clamp(0.95rem, 1.5vw, 1.12rem);
  font-weight: 400;
  letter-spacing: 0;
  line-height: 1.4;
  text-align: center;
  cursor: pointer;
}

.landing-help-link {
  color: #9b2f2f;
  font-weight: 650;
}

.landing-simulation-link {
  color: #006b5f;
}

.landing-link:hover,
.landing-link:focus-visible {
  color: var(--accent-strong);
  text-decoration: underline;
  outline: none;
}

.landing-separator {
  width: min(82%, 680px);
  height: 1px;
  margin: -16px 0 36px;
  background: #d8b7b7;
}

.app-view {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 24px 0 40px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 26px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 14px;
}

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

.back-link {
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 14px;
  background: var(--field);
  color: var(--ink);
  font-weight: 700;
  cursor: pointer;
}

.back-link:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.intro {
  max-width: 780px;
  margin-bottom: 28px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h2 {
  margin: 0;
  font-size: clamp(2rem, 5vw, 4rem);
  line-height: 1.05;
}

p {
  color: var(--muted);
  line-height: 1.6;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.65fr);
  gap: 18px;
  align-items: start;
  margin-bottom: 30px;
}

.controls,
.summary-panel,
.results {
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: 8px;
}

.controls {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  padding: 20px;
}

label {
  display: grid;
  gap: 8px;
  color: var(--ink);
  font-weight: 700;
}

small {
  color: var(--muted);
  font-weight: 500;
  line-height: 1.45;
}

input {
  width: 100%;
  min-height: 44px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--field);
  color: var(--ink);
}

select {
  width: 100%;
  min-height: 44px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--field);
  color: var(--ink);
}

input:focus,
select:focus {
  outline: 3px solid var(--accent-soft);
  border-color: var(--accent);
}

label[hidden] {
  display: none;
}

.controls button,
#download-xls,
.download-button {
  min-height: 44px;
  border: 0;
  border-radius: 8px;
  padding: 10px 16px;
  background: var(--accent);
  color: white;
  font-weight: 800;
  cursor: pointer;
}

.controls button:hover,
#download-xls:hover:not(:disabled),
.download-button:hover {
  background: var(--accent-strong);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.48;
}

.controls button {
  align-self: end;
}

.summary-panel {
  padding: 20px;
}

.progress-bar {
  position: relative;
  height: 28px;
  overflow: hidden;
  margin: 0 0 18px;
  border-radius: 8px;
  background: var(--line);
}

.progress-bar[hidden] {
  display: none;
}

.progress-bar span {
  display: block;
  width: 0%;
  height: 100%;
  border-radius: inherit;
  background: var(--accent);
  transition: width 160ms ease;
}

.progress-bar strong {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: var(--ink);
  font-size: 0.8rem;
  font-weight: 800;
}

dl {
  display: grid;
  gap: 12px;
  margin: 0 0 18px;
}

dl div {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 10px;
}

dt {
  color: var(--muted);
}

dd {
  margin: 0;
  font-weight: 800;
  text-align: right;
}

.results {
  overflow: hidden;
  margin-bottom: 30px;
}

.results-heading {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 20px;
  border-bottom: 1px solid var(--line);
}

.results-heading p {
  max-width: 420px;
  margin: 0;
  text-align: right;
}

.database-results-label {
  font-size: 1.02rem;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--line);
}

#graphy-metrics,
#random-graph-metrics {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.formula-panel {
  display: grid;
  gap: 14px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--line);
}

.formula-panel p {
  display: grid;
  gap: 8px;
  margin: 0;
}

.formula-panel strong {
  color: var(--ink);
}

.math-line {
  display: block;
  overflow-x: auto;
  color: var(--ink);
}

.formula-panel mjx-container[jax="SVG"] {
  margin: 0;
}

.slide-panel {
  padding: 16px 20px;
  border-bottom: 1px solid var(--line);
}

.slide-panel img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 8px;
}

.credit-panel {
  padding: 16px 20px;
  border-bottom: 1px solid var(--line);
}

.credit-panel p {
  margin: 0;
}

.credit-panel a {
  color: var(--accent);
  font-weight: 700;
  overflow-wrap: anywhere;
}

.bibliography-panel {
  padding: 20px;
  border-bottom: 1px solid var(--line);
}

.bibliography-panel h2 {
  margin: 0 0 14px;
  font-size: clamp(1.35rem, 2.6vw, 2.2rem);
}

.bibliography-panel ol {
  display: grid;
  gap: 14px;
  margin: 0;
  padding-left: 22px;
}

.bibliography-panel li {
  color: var(--muted);
  line-height: 1.55;
}

.bibliography-panel a {
  display: block;
  margin-top: 4px;
  color: var(--accent);
  font-weight: 700;
  overflow-wrap: anywhere;
}

.graph-preview h3 mjx-container[jax="SVG"] {
  display: inline-block;
  font-size: 1em !important;
}

.metrics article {
  display: grid;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--field);
  padding: 14px;
}

.metrics span {
  color: var(--muted);
  font-size: 0.9rem;
}

.metrics strong {
  font-size: clamp(1.1rem, 3vw, 1.6rem);
}

.graph-preview {
  display: grid;
  gap: 16px;
  padding: 16px 20px 20px;
  border-bottom: 1px solid var(--line);
}

.graph-preview-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.graph-preview-card {
  display: grid;
  gap: 10px;
}

.graph-preview-card h3,
.graph-preview-card p {
  margin: 0;
}

.graph-preview-card h3 {
  font-size: 1rem;
}

.graph-preview svg {
  width: min(100%, 560px);
  height: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--field);
}

.graph-preview line {
  stroke: var(--muted);
  stroke-width: 2;
}

.graph-preview circle {
  fill: var(--accent-soft);
  stroke: var(--accent);
  stroke-width: 2;
}

.graph-preview text {
  fill: var(--ink);
  font-size: 13px;
  font-weight: 800;
  text-anchor: middle;
  dominant-baseline: central;
}

.graph-preview pre {
  overflow-x: auto;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--field);
  padding: 12px;
}

.table-wrap {
  overflow: auto;
  max-height: 560px;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 820px;
}

th,
td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  position: sticky;
  top: 0;
  background: #edf3f0;
  color: var(--ink);
  font-size: 0.88rem;
}

td {
  font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
}

.error {
  color: var(--warning);
  font-weight: 800;
}

@media (max-width: 760px) {
  .app-view {
    width: min(100% - 20px, 1180px);
    padding: 18px 0 28px;
  }

  .landing-view {
    padding-top: 9vh;
  }

  .landing-view h1 {
    margin-bottom: 12px;
  }

  .workspace,
  .controls,
  .results-heading,
  .metrics,
  #graphy-metrics,
  #random-graph-metrics,
  .graph-preview-grid {
    grid-template-columns: 1fr;
  }

  .results-heading {
    display: grid;
  }

  .results-heading p,
  .topbar p {
    max-width: none;
    text-align: left;
  }

  .topbar {
    display: grid;
  }
}