:root {
  color-scheme: light;
  --sand: #e8dcc7;
  --oat: #d4b895;
  --sage: #8b9d83;
  --clay: #b08b6e;
  --terracotta: #c66b3d;
  --ochre: #c08e3a;
  --moss: #606c38;
  --moss-deep: #3f4928;
  --display: "Fraunces", Georgia, serif;
  --body: "Epilogue", Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-width: 320px;
  color: var(--moss-deep);
  background: var(--sand);
  font-family: var(--body);
  line-height: 1.5;
}

button, input, select { font: inherit; }

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

a { color: inherit; }

.grain {
  position: fixed;
  inset: 0;
  z-index: 10;
  pointer-events: none;
  opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.78' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.9'/%3E%3C/svg%3E");
}

.masthead {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 2rem;
  width: min(1480px, calc(100% - 48px));
  margin: 0 auto;
  padding: 24px 0;
  border-bottom: 1px solid rgba(96, 108, 56, 0.38);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  width: max-content;
  font-weight: 700;
  text-decoration: none;
}

.brand-mark {
  width: 22px;
  height: 22px;
  border: 6px solid var(--moss);
  border-radius: 50% 50% 50% 16%;
  transform: rotate(-25deg);
}

nav { display: flex; gap: 28px; }

nav a {
  font-size: 0.84rem;
  font-weight: 600;
  text-decoration: none;
}

nav a:hover { color: var(--terracotta); }

.quiet-button {
  justify-self: end;
  padding: 10px 16px;
  color: var(--moss-deep);
  background: transparent;
  border: 1px solid var(--moss);
  border-radius: 999px;
  cursor: pointer;
}

.quiet-button:hover { background: rgba(139, 157, 131, 0.28); }

main, footer {
  width: min(1480px, calc(100% - 48px));
  margin-inline: auto;
}

.intro {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(300px, 0.55fr);
  gap: clamp(3rem, 10vw, 11rem);
  padding: clamp(64px, 10vw, 132px) 0 72px;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--terracotta);
  font-size: 0.73rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1, h2 { margin: 0; font-family: var(--display); font-weight: 500; line-height: 0.98; }

h1 { max-width: 960px; font-size: clamp(4rem, 8.7vw, 9rem); letter-spacing: -0.055em; }

h2 { font-size: clamp(2.4rem, 5vw, 5.6rem); letter-spacing: -0.045em; }

.intro-copy { align-self: end; padding-bottom: 8px; }

.intro-copy > p:first-child { margin: 0 0 28px; font-size: 1rem; line-height: 1.75; }

#csvInput { position: absolute; width: 1px; height: 1px; opacity: 0; overflow: hidden; }

.source-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }

.file-button {
  display: inline-block;
  padding: 13px 22px;
  color: var(--sand);
  background: var(--moss-deep);
  border-radius: 999px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 360ms ease, background 360ms ease;
}

.file-button:hover { background: var(--terracotta); transform: translateY(-2px); }

.source-note { margin: 14px 0 0; color: var(--moss); font-size: 0.76rem; }
.local-note { margin: 8px 0 0; color: var(--moss); font-size: 0.7rem; line-height: 1.6; }
.source-badge {
  padding: 7px 10px;
  color: var(--moss-deep);
  border: 1px solid var(--moss);
  border-radius: 999px;
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}
.source-badge[data-source="uploaded"] { color: var(--sand); background: var(--moss); }
.source-badge[data-source="pending"] { background: var(--oat); }

.runbook {
  margin-bottom: 42px;
  padding: clamp(28px, 4vw, 48px);
  background: rgba(139, 157, 131, 0.24);
  border: 1px solid rgba(96, 108, 56, 0.3);
  border-radius: 28px;
}
.runbook-heading { display: flex; align-items: end; justify-content: space-between; gap: 36px; }
.runbook-heading h2 { max-width: 760px; font-size: clamp(2.25rem, 4.2vw, 4.8rem); }
.analysis-status {
  width: min(100%, 450px);
  padding: 18px 20px;
  background: var(--sand);
  border: 1px solid rgba(96, 108, 56, 0.42);
  border-left: 7px solid var(--moss);
  border-radius: 18px;
}
.analysis-status[data-state="reading"],
.analysis-status[data-state="mapping-required"] { border-left-color: var(--ochre); }
.analysis-status[data-state="invalid-file"],
.analysis-status[data-state="file-read-error"],
.analysis-status[data-state="analysis-error"] { border-left-color: var(--terracotta); }
.analysis-status span { display: block; font-size: 0.75rem; font-weight: 700; }
.analysis-status p { margin: 8px 0 0; color: var(--moss); font-size: 0.74rem; line-height: 1.6; }

.route-strip {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 1px;
  margin: 34px 0 0;
  padding: 1px;
  overflow: hidden;
  list-style: none;
  background: rgba(96, 108, 56, 0.32);
  border-radius: 22px;
}
.route-step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 13px;
  min-height: 220px;
  padding: 22px 18px;
  background: var(--sand);
  border-top: 7px solid rgba(96, 108, 56, 0.2);
}
.route-step[data-state="complete"] { background: rgba(139, 157, 131, 0.35); border-top-color: var(--moss); }
.route-step[data-state="current"] { background: var(--oat); border-top-color: var(--terracotta); }
.route-number { color: var(--terracotta); font-family: var(--display); font-size: 1.15rem; line-height: 1; }
.route-step h3 { margin: 0; font-family: var(--display); font-size: 1.16rem; font-weight: 500; line-height: 1.1; }
.route-step p { margin: 13px 0 20px; color: var(--moss); font-size: 0.72rem; line-height: 1.6; }
.route-step a, .route-action {
  display: inline;
  padding: 0 0 3px;
  color: var(--moss-deep);
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--moss);
  font-size: 0.7rem;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
}
.route-step a[aria-disabled="true"] { color: var(--moss); border-bottom-style: dotted; pointer-events: none; }

button:disabled, input:disabled {
  opacity: 0.48;
  cursor: not-allowed;
}
.quiet-button:disabled:hover { background: transparent; }

#data-source, #mappingPanel, #dataContract, #scenario { scroll-margin-top: 24px; }

:where(a, button, .file-button, input, select):focus-visible {
  outline: 3px solid rgba(198, 107, 61, 0.55);
  outline-offset: 4px;
}
.intro-copy:has(#csvInput:focus-visible) .file-button {
  outline: 3px solid rgba(198, 107, 61, 0.55);
  outline-offset: 4px;
}

.mapping-panel {
  margin-bottom: 42px;
  padding: clamp(28px, 4vw, 54px);
  background: var(--oat);
  border: 1px solid rgba(96, 108, 56, 0.34);
  border-radius: 28px;
}

.mapping-heading, .contract-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 36px;
}

.mapping-heading h2, .contract-heading h2 { font-size: clamp(2.2rem, 4vw, 4.4rem); }
.mapping-heading > p { max-width: 480px; margin: 0; color: var(--moss); font-size: 0.82rem; line-height: 1.7; }

.mapping-form {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  margin-top: 38px;
}

.mapping-form label { display: grid; gap: 8px; }
.mapping-form label > span { color: var(--moss); font-size: 0.73rem; font-weight: 700; }
.mapping-form label small { font-weight: 500; }
.mapping-form select {
  width: 100%;
  min-height: 46px;
  padding: 10px 34px 10px 12px;
  color: var(--moss-deep);
  background: var(--sand);
  border: 1px solid rgba(96, 108, 56, 0.48);
  border-radius: 16px;
}
.mapping-form select:focus-visible { outline: 3px solid rgba(198, 107, 61, 0.45); outline-offset: 2px; }
.mapping-action { grid-column: 1 / -1; display: flex; align-items: center; gap: 18px; margin-top: 8px; }
.mapping-action button {
  padding: 13px 20px;
  color: var(--sand);
  background: var(--moss-deep);
  border: 0;
  border-radius: 999px;
  font-weight: 700;
  cursor: pointer;
}
.mapping-action button:hover { background: var(--terracotta); }
.mapping-action p { margin: 0; color: #8b3325; font-size: 0.78rem; }

.metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  overflow: hidden;
  background: rgba(96, 108, 56, 0.32);
  border: 1px solid rgba(96, 108, 56, 0.32);
  border-radius: 24px;
}

.metrics article { padding: 25px; background: rgba(212, 184, 149, 0.46); }
.metrics span, .metrics small { display: block; color: var(--moss); font-size: 0.74rem; }
.metrics strong { display: inline-block; margin: 16px 5px 6px 0; font-family: var(--display); font-size: clamp(2rem, 4vw, 4.2rem); font-weight: 500; line-height: 1; }

.data-contract {
  margin-top: 38px;
  padding: clamp(28px, 4vw, 48px);
  background: rgba(139, 157, 131, 0.3);
  border: 1px solid rgba(96, 108, 56, 0.3);
  border-radius: 28px;
}
.contract-heading > span {
  padding: 7px 10px;
  color: var(--moss-deep);
  border: 1px solid rgba(96, 108, 56, 0.42);
  border-radius: 999px;
  font-family: var(--body);
  font-size: 0.68rem;
  font-variant-numeric: tabular-nums;
}
.contract-grid { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 1px; margin-top: 34px; background: rgba(96, 108, 56, 0.28); border: 1px solid rgba(96, 108, 56, 0.28); border-radius: 20px; overflow: hidden; }
.contract-grid article { min-height: 132px; padding: 20px; background: var(--sand); }
.contract-grid span { display: block; color: var(--moss); font-size: 0.69rem; }
.contract-grid strong { display: block; margin-top: 18px; font-size: 0.82rem; line-height: 1.55; overflow-wrap: anywhere; }
.data-contract details { margin-top: 18px; padding-top: 18px; border-top: 1px solid rgba(96, 108, 56, 0.3); }
.data-contract summary { color: var(--moss-deep); font-size: 0.78rem; font-weight: 700; cursor: pointer; }
.data-contract ol { margin: 14px 0 0; padding-left: 22px; color: var(--moss); font-size: 0.75rem; }
.data-contract li + li { margin-top: 7px; }

.workspace { margin-top: 38px; padding: clamp(28px, 4vw, 58px); background: var(--moss-deep); border-radius: 32px; color: var(--sand); }

.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 32px; }
.workspace .eyebrow { color: var(--ochre); }

.legend { display: flex; flex-wrap: wrap; gap: 18px; font-size: 0.72rem; }
.legend span { display: flex; align-items: center; gap: 7px; }
.legend i { display: inline-block; width: 24px; height: 3px; border-radius: 999px; }
.legend .observed { background: var(--sand); }
.legend .baseline { background: var(--sage); }
.legend .forecast { background: var(--ochre); }
.legend .flagged { width: 8px; height: 8px; background: var(--terracotta); }

.chart-wrap { position: relative; height: 420px; margin-top: 48px; }
#loadChart { width: 100%; height: 100%; overflow: visible; }
.chart-grid { stroke: rgba(232, 220, 199, 0.16); stroke-width: 1; vector-effect: non-scaling-stroke; }
.chart-label { fill: var(--sage); font-family: var(--body); font-size: 12px; }
.observed-line, .baseline-line, .forecast-line { fill: none; stroke-linecap: round; stroke-linejoin: round; vector-effect: non-scaling-stroke; }
.observed-line { stroke: var(--sand); stroke-width: 3; }
.baseline-line { stroke: var(--sage); stroke-width: 3; stroke-dasharray: 3 8; }
.forecast-line { stroke: var(--ochre); stroke-width: 4; stroke-dasharray: 9 9; }
.anomaly-dot { fill: var(--terracotta); stroke: var(--moss-deep); stroke-width: 5; vector-effect: non-scaling-stroke; }
.chart-empty { position: absolute; inset: 0; display: grid; place-items: center; color: var(--sage); }

.equation-card {
  display: grid;
  grid-template-columns: 180px 1fr minmax(200px, 0.55fr);
  gap: 28px;
  align-items: center;
  margin-top: 20px;
  padding: 22px 0 0;
  border-top: 1px solid rgba(232, 220, 199, 0.2);
}
.equation-card span { color: var(--sage); font-size: 0.72rem; }
.equation-card code { color: var(--sand); font-family: var(--body); font-size: clamp(0.82rem, 1.4vw, 1.12rem); font-variant-numeric: tabular-nums; }
.equation-card p { margin: 0; color: var(--sage); font-size: 0.76rem; }

.scenario-grid {
  display: grid;
  grid-template-columns: 0.8fr 1fr 0.85fr;
  gap: clamp(32px, 6vw, 90px);
  padding: clamp(90px, 12vw, 160px) 0;
}
.scenario-copy > p:not(.eyebrow):not(.scenario-gate) { max-width: 520px; margin: 30px 0 0; line-height: 1.75; }
.scenario-copy .scenario-gate { margin-top: 14px; color: var(--moss); font-size: 0.74rem; }

.controls { display: flex; flex-direction: column; justify-content: center; gap: 34px; }
.controls label > span { display: flex; justify-content: space-between; gap: 24px; margin-bottom: 12px; font-size: 0.82rem; font-weight: 600; }
.controls output { color: var(--terracotta); font-variant-numeric: tabular-nums; }
.controls input[type="range"] { width: 100%; accent-color: var(--moss); }
.controls button { align-self: flex-start; padding: 0; color: var(--moss); background: transparent; border: 0; border-bottom: 1px solid var(--moss); cursor: pointer; }

.scenario-result { align-self: center; padding: 32px; background: var(--oat); border-radius: 28px; }
.scenario-result > span { color: var(--moss); font-size: 0.75rem; }
.scenario-result strong { display: block; margin: 22px 0 26px; font-family: var(--display); font-size: clamp(2.7rem, 5vw, 5rem); font-weight: 500; line-height: 1; }
.scenario-result strong b { font-weight: 500; }
.risk-line > span { display: block; margin-bottom: 8px; font-size: 0.78rem; font-weight: 700; }
.risk-track { height: 7px; overflow: hidden; background: rgba(96, 108, 56, 0.22); border-radius: 999px; }
.risk-track i { display: block; width: 0; height: 100%; background: var(--terracotta); border-radius: inherit; transition: width 420ms ease; }
.scenario-result p { margin: 24px 0 0; font-size: 0.83rem; line-height: 1.7; }

.findings { padding: 58px; background: rgba(139, 157, 131, 0.32); border-radius: 32px; }
.findings .section-heading > p { max-width: 430px; margin: 0; font-size: 0.82rem; }
.finding-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 48px; }
.finding { min-height: 190px; padding: 24px; background: var(--sand); border-radius: 22px; }
.finding header { display: flex; justify-content: space-between; gap: 16px; color: var(--terracotta); font-size: 0.72rem; font-weight: 700; }
.finding h3 { margin: 38px 0 12px; font-family: var(--display); font-size: 1.45rem; font-weight: 500; }
.finding p { margin: 0; color: var(--moss); font-size: 0.78rem; }
.finding-empty { grid-column: 1 / -1; margin: 0; padding: 28px; border: 1px solid rgba(96, 108, 56, 0.35); border-radius: 22px; }

footer { display: flex; justify-content: space-between; gap: 24px; padding: 32px 0 48px; color: var(--moss); font-size: 0.74rem; }

@media (max-width: 1000px) {
  .intro, .scenario-grid { grid-template-columns: 1fr; }
  .intro { gap: 48px; }
  .intro-copy { max-width: 620px; }
  .metrics { grid-template-columns: repeat(2, 1fr); }
  .mapping-form { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .contract-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .runbook-heading { align-items: flex-start; flex-direction: column; }
  .route-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .scenario-grid { gap: 52px; }
  .scenario-result { max-width: 620px; }
  .finding-list { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 720px) {
  .masthead { grid-template-columns: 1fr auto; width: min(100% - 28px, 1480px); }
  nav { display: none; }
  main, footer { width: min(100% - 28px, 1480px); }
  .intro { padding-top: 70px; }
  h1 { font-size: clamp(3.25rem, 18vw, 6rem); }
  .metrics { grid-template-columns: 1fr; }
  .mapping-heading, .contract-heading { align-items: flex-start; flex-direction: column; }
  .mapping-form, .contract-grid { grid-template-columns: 1fr; }
  .runbook { padding: 26px 18px; border-radius: 24px; }
  .route-strip { grid-template-columns: 1fr; }
  .route-step { min-height: 0; }
  .mapping-action { align-items: flex-start; flex-direction: column; }
  .workspace, .findings { padding: 26px 18px; border-radius: 24px; }
  .section-heading { align-items: flex-start; flex-direction: column; }
  .chart-wrap { height: 320px; margin-top: 34px; }
  .equation-card { grid-template-columns: 1fr; gap: 12px; }
  .finding-list { grid-template-columns: 1fr; }
  footer { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; }
}