:root {
  --page: #f3f6f5;
  --surface: #ffffff;
  --surface-muted: #edf2f0;
  --ink: #172326;
  --muted: #627176;
  --line: #d6dfdc;
  --line-strong: #bac8c3;
  --nav: #192628;
  --nav-hover: #263638;
  --green: #14745f;
  --green-soft: #e3f2ed;
  --blue: #315fa8;
  --blue-soft: #e8eef8;
  --coral: #c45b49;
  --coral-soft: #f8ebe7;
  --gold: #9b6b14;
  --gold-soft: #f8f0dd;
  --shadow: 0 1px 2px rgba(23, 35, 38, 0.07);
  color: var(--ink);
  background: var(--page);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
}

* {
  box-sizing: border-box;
  letter-spacing: 0;
}

html {
  background: var(--page);
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  background: var(--page);
}

button,
input {
  font: inherit;
}

button,
summary {
  cursor: pointer;
}

a {
  color: inherit;
}

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 224px minmax(0, 1fr);
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  padding: 22px 16px 18px;
  display: flex;
  flex-direction: column;
  color: #f7fbfa;
  background: var(--nav);
  border-right: 1px solid #10191b;
}

.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  min-height: 42px;
  padding: 0 8px 20px;
  border-bottom: 1px solid #344346;
}

.brand-mark {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  color: #7ad2bf;
  border: 2px solid #7ad2bf;
  font-size: 12px;
  font-weight: 800;
}

.brand strong {
  display: block;
  font-size: 15px;
}

.brand small {
  display: block;
  margin-top: 2px;
  color: #aab8bb;
  font-size: 11px;
}

.nav {
  display: grid;
  gap: 4px;
  padding-top: 20px;
}

.nav-button {
  width: 100%;
  min-height: 42px;
  padding: 10px 12px;
  color: #b9c6c8;
  background: transparent;
  border: 0;
  border-left: 3px solid transparent;
  text-align: left;
}

.nav-button:hover,
.nav-button.active {
  color: #ffffff;
  background: var(--nav-hover);
  border-left-color: #7ad2bf;
}

.sidebar-foot {
  margin-top: auto;
  padding: 13px 12px;
  color: #aab8bb;
  border-top: 1px solid #344346;
  font-size: 11px;
  line-height: 1.45;
}

.sidebar-foot strong {
  display: block;
  margin-bottom: 3px;
  color: #ffffff;
  font-size: 11px;
}

.main-shell {
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  min-height: 64px;
  padding: 11px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
}

.persona {
  display: flex;
  align-items: center;
  gap: 10px;
}

.avatar {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  color: #ffffff;
  background: #5d538d;
  font-size: 12px;
  font-weight: 800;
}

.persona strong {
  display: block;
  font-size: 13px;
}

.persona span {
  display: block;
  margin-top: 1px;
  color: var(--muted);
  font-size: 11px;
}

.demo-badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 28px;
  padding: 0 9px;
  color: #36544c;
  background: var(--green-soft);
  border: 1px solid #c8e1d8;
  font-size: 11px;
  font-weight: 700;
}

.demo-badge::before {
  width: 7px;
  height: 7px;
  content: "";
  background: var(--green);
  border-radius: 50%;
}

.content {
  width: 100%;
  max-width: 1260px;
  margin: 0 auto;
  padding: 34px 30px 42px;
}

.view {
  display: none;
  animation: view-in 180ms ease-out;
}

.view.active {
  display: block;
}

@keyframes view-in {
  from { opacity: 0; transform: translateY(3px); }
  to { opacity: 1; transform: translateY(0); }
}

.page-intro {
  max-width: 820px;
  margin-bottom: 24px;
}

.kicker {
  margin: 0 0 7px;
  color: var(--green);
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
}

h1,
h2,
h3,
h4,
p {
  overflow-wrap: anywhere;
}

h1 {
  max-width: 820px;
  margin: 0;
  font-size: 30px;
  line-height: 1.16;
}

.page-intro > p:last-child {
  max-width: 740px;
  margin: 9px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
}

.result-band {
  display: grid;
  grid-template-columns: minmax(270px, 1.15fr) minmax(0, 2fr);
  margin-bottom: 14px;
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.primary-result {
  min-height: 172px;
  padding: 22px;
  border-right: 1px solid var(--line);
  border-top: 4px solid var(--green);
}

.label {
  color: var(--muted);
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
}

.result-value {
  margin: 8px 0 4px;
  color: var(--green);
  font-size: 38px;
  font-weight: 850;
  font-variant-numeric: tabular-nums;
  line-height: 1;
}

.result-copy {
  margin: 0;
  color: var(--ink);
  font-size: 13px;
  line-height: 1.45;
}

.result-meta {
  margin-top: 12px;
  display: flex;
  align-items: center;
  gap: 9px;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 11px;
}

.claim-pill {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 0 8px;
  color: #684b12;
  background: var(--gold-soft);
  border: 1px solid #ead7a9;
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
}

.supporting-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.support-metric {
  min-height: 168px;
  padding: 22px 18px;
  border-right: 1px solid var(--line);
}

.support-metric:last-child {
  border-right: 0;
}

.support-metric strong {
  display: block;
  margin: 10px 0 5px;
  font-size: 25px;
  font-variant-numeric: tabular-nums;
}

.support-metric:nth-child(1) strong { color: var(--blue); }
.support-metric:nth-child(2) strong { color: var(--coral); }
.support-metric:nth-child(3) strong { color: var(--gold); }

.support-metric p {
  margin: 0;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.4;
}

.journey {
  margin-bottom: 14px;
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.section-bar {
  min-height: 50px;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  border-bottom: 1px solid var(--line);
}

.section-bar h2,
.section-bar h3 {
  margin: 0;
  font-size: 14px;
}

.section-bar p {
  margin: 3px 0 0;
  color: var(--muted);
  font-size: 11px;
}

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

.journey-step {
  position: relative;
  min-width: 0;
  min-height: 112px;
  padding: 16px;
  color: var(--ink);
  background: var(--surface);
  border: 0;
  border-right: 1px solid var(--line);
  text-align: left;
}

.journey-step:last-child {
  border-right: 0;
}

.journey-step:hover {
  background: var(--surface-muted);
}

.journey-step:focus-visible {
  z-index: 2;
  outline: 3px solid rgba(49, 95, 168, 0.28);
  outline-offset: -3px;
}

.step-index {
  display: block;
  margin-bottom: 9px;
  color: var(--muted);
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
}

.step-value {
  display: block;
  font-size: 16px;
  font-weight: 800;
  line-height: 1.2;
}

.step-note {
  display: block;
  margin-top: 5px;
  color: var(--muted);
  font-size: 10px;
  line-height: 1.4;
}

.overview-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.65fr) minmax(280px, 0.72fr);
  gap: 14px;
  align-items: stretch;
}

.workspace,
.reading-panel,
.schedule-panel,
.controls-panel,
.quality-panel,
.context-panel,
.method-panel {
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.chart-toolbar {
  min-height: 58px;
  padding: 13px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  border-bottom: 1px solid var(--line);
}

.chart-toolbar h2 {
  margin: 0;
  font-size: 14px;
}

.chart-toolbar p {
  margin: 3px 0 0;
  color: var(--muted);
  font-size: 11px;
}

.segmented {
  display: inline-flex;
  flex: 0 0 auto;
  border: 1px solid var(--line-strong);
}

.segmented button {
  min-width: 58px;
  min-height: 32px;
  padding: 0 10px;
  color: var(--muted);
  background: var(--surface);
  border: 0;
  border-right: 1px solid var(--line-strong);
  font-size: 11px;
  font-weight: 700;
}

.segmented button:last-child {
  border-right: 0;
}

.segmented button.active {
  color: #ffffff;
  background: var(--nav);
}

.chart-wrap {
  position: relative;
  min-height: 316px;
  padding: 18px 18px 10px;
}

#chart {
  width: 100%;
  min-height: 260px;
  display: block;
  aspect-ratio: 2.7 / 1;
}

.chart-tooltip {
  position: absolute;
  z-index: 5;
  width: max-content;
  max-width: 190px;
  padding: 9px 10px;
  color: #ffffff;
  background: #172326;
  border: 1px solid #314347;
  box-shadow: 0 8px 24px rgba(23, 35, 38, 0.2);
  font-size: 11px;
  line-height: 1.45;
  pointer-events: none;
}

.chart-tooltip[hidden] {
  display: none;
}

.legend {
  min-height: 42px;
  padding: 10px 17px;
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  color: var(--muted);
  border-top: 1px solid var(--line);
  font-size: 11px;
}

.legend i {
  width: 8px;
  height: 8px;
  display: inline-block;
  margin-right: 5px;
  border-radius: 50%;
}

.reading-panel {
  padding: 20px;
}

.reading-panel h2 {
  margin: 0 0 12px;
  font-size: 16px;
}

.reading-panel > p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}

.reading-facts {
  margin: 18px 0;
  border-top: 1px solid var(--line);
}

.reading-fact {
  padding: 12px 0;
  display: grid;
  grid-template-columns: 82px 1fr;
  gap: 10px;
  border-bottom: 1px solid var(--line);
  font-size: 11px;
  line-height: 1.4;
}

.reading-fact span:first-child {
  color: var(--muted);
}

.actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.button {
  min-height: 38px;
  padding: 0 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--line-strong);
  font-size: 11px;
  font-weight: 800;
  text-decoration: none;
}

.button:hover {
  background: var(--surface-muted);
}

.button.primary {
  color: #ffffff;
  background: var(--nav);
  border-color: var(--nav);
}

.button.primary:hover {
  background: #2a3d40;
}

.experiment-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(300px, 0.72fr);
  gap: 14px;
  align-items: start;
}

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

.schedule-head h2 {
  margin: 0;
  font-size: 17px;
}

.schedule-head p {
  margin: 5px 0 0;
  color: var(--muted);
  font-size: 11px;
}

.schedule-key {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 10px;
}

.schedule-key i {
  width: 9px;
  height: 9px;
  display: inline-block;
  margin-right: 4px;
}

.schedule {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
}

.day {
  min-width: 0;
  min-height: 104px;
  padding: 12px 10px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  font-size: 10px;
}

.day:nth-child(7n) {
  border-right: 0;
}

.day:nth-last-child(-n + 7) {
  border-bottom: 0;
}

.day strong {
  display: block;
  margin-bottom: 11px;
  font-size: 11px;
}

.day span {
  color: var(--muted);
  line-height: 1.35;
}

.day.cutoff {
  background: var(--green-soft);
  box-shadow: inset 0 3px 0 var(--green);
}

.day.usual {
  background: var(--coral-soft);
  box-shadow: inset 0 3px 0 var(--coral);
}

.controls-panel {
  padding: 19px;
}

.controls-panel h2 {
  margin: 0 0 13px;
  font-size: 15px;
}

.control {
  min-height: 35px;
  margin: 8px 0;
  display: grid;
  grid-template-columns: 18px 1fr;
  gap: 8px;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.45;
}

.check {
  width: 17px;
  height: 17px;
  display: grid;
  place-items: center;
  color: var(--green);
  border: 1px solid var(--green);
  font-size: 10px;
}

.decision {
  margin-top: 16px;
  padding: 13px;
  background: var(--blue-soft);
  border-left: 3px solid var(--blue);
  font-size: 11px;
  line-height: 1.55;
}

.decision strong {
  display: block;
  margin-bottom: 4px;
}

.pause-details {
  margin-top: 12px;
  border-top: 1px solid var(--line);
}

.pause-details summary {
  padding: 13px 0 6px;
  font-size: 11px;
  font-weight: 800;
}

.pause-details ul {
  margin: 5px 0 0;
  padding-left: 18px;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.55;
}

.quality-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-bottom: 14px;
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.quality-stat {
  min-height: 104px;
  padding: 17px;
  border-right: 1px solid var(--line);
}

.quality-stat:last-child {
  border-right: 0;
}

.quality-stat strong {
  display: block;
  margin: 8px 0 3px;
  font-size: 23px;
  font-variant-numeric: tabular-nums;
}

.quality-stat p {
  margin: 0;
  color: var(--muted);
  font-size: 10px;
  line-height: 1.4;
}

.data-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  gap: 14px;
  align-items: start;
}

.quality-panel,
.context-panel,
.method-panel {
  padding: 19px;
}

.quality-panel h2,
.context-panel h2,
.method-panel h2 {
  margin: 0;
  font-size: 15px;
}

.panel-lede {
  margin: 5px 0 16px;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.5;
}

.source-list {
  border-top: 1px solid var(--line);
}

.source-row {
  min-height: 70px;
  padding: 13px 0;
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 12px;
  border-bottom: 1px solid var(--line);
}

.source-row:last-child {
  border-bottom: 0;
}

.source-row span {
  color: var(--muted);
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
}

.source-row strong {
  display: block;
  margin-bottom: 3px;
  font-size: 12px;
}

.source-row p {
  margin: 0;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.45;
}

.warning-list {
  margin-top: 14px;
  display: grid;
  gap: 8px;
}

.warning {
  padding: 10px 11px;
  color: #654b18;
  background: var(--gold-soft);
  border-left: 3px solid var(--gold);
  font-size: 11px;
  line-height: 1.45;
}

.context-item {
  padding: 16px 0;
  display: grid;
  grid-template-columns: 82px minmax(0, 1fr);
  gap: 13px;
  border-top: 1px solid var(--line);
}

.context-value {
  min-height: 56px;
  padding: 9px;
  display: grid;
  place-items: center;
  color: var(--blue);
  background: var(--blue-soft);
  font-size: 13px;
  font-weight: 850;
  text-align: center;
}

.context-item:nth-of-type(3) .context-value {
  color: var(--green);
  background: var(--green-soft);
}

.context-copy strong {
  display: block;
  margin-bottom: 4px;
  font-size: 12px;
}

.context-copy p {
  margin: 0;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.5;
}

.method-panel {
  grid-column: 1 / -1;
}

.method-details {
  margin-top: 14px;
  border-top: 1px solid var(--line);
}

.method-details summary {
  min-height: 44px;
  padding: 13px 0;
  font-size: 11px;
  font-weight: 800;
}

.method-content {
  padding: 0 0 5px;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.55;
}

.formula-list {
  margin: 12px 0;
  padding: 13px;
  color: #eef7f5;
  background: var(--nav);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 10px;
  line-height: 1.55;
}

.formula-list div + div {
  margin-top: 8px;
}

.privacy-band {
  margin-top: 14px;
  padding: 16px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  background: var(--green-soft);
  border: 1px solid #c7dfd7;
}

.privacy-band strong {
  display: block;
  margin-bottom: 3px;
  font-size: 12px;
}

.privacy-band p {
  margin: 0;
  color: #426158;
  font-size: 11px;
  line-height: 1.5;
}

.site-footer {
  width: calc(100% - 60px);
  max-width: 1200px;
  margin: auto auto 0;
  padding: 18px 0 24px;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  color: var(--muted);
  border-top: 1px solid var(--line);
  font-size: 11px;
}

.site-footer nav {
  display: flex;
  gap: 14px;
}

.site-footer a:hover {
  color: var(--ink);
}

.loading,
.error-state {
  padding: 80px 24px;
  color: var(--muted);
  text-align: center;
}

.error-state strong {
  display: block;
  margin-bottom: 6px;
  color: var(--ink);
}

@media (max-width: 1040px) {
  .overview-grid,
  .experiment-layout,
  .data-layout {
    grid-template-columns: 1fr;
  }

  .method-panel {
    grid-column: auto;
  }

  .chart-wrap {
    min-height: 280px;
  }
}

@media (max-width: 880px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: sticky;
    z-index: 20;
    height: auto;
    min-height: 58px;
    padding: 8px 12px;
    flex-direction: row;
    align-items: center;
    overflow-x: auto;
  }

  .brand {
    min-height: 40px;
    padding: 0 12px 0 0;
    border: 0;
  }

  .brand-copy,
  .sidebar-foot {
    display: none;
  }

  .nav {
    padding: 0;
    display: flex;
    gap: 2px;
  }

  .nav-button {
    width: auto;
    white-space: nowrap;
    border-left: 0;
    border-bottom: 3px solid transparent;
  }

  .nav-button:hover,
  .nav-button.active {
    border-left-color: transparent;
    border-bottom-color: #7ad2bf;
  }

  .topbar {
    position: static;
  }

  .result-band {
    grid-template-columns: 1fr;
  }

  .primary-result {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }
}

@media (max-width: 680px) {
  .topbar {
    min-height: 58px;
    padding: 10px 14px;
  }

  .demo-badge {
    font-size: 10px;
  }

  .content {
    padding: 24px 13px 32px;
  }

  h1 {
    font-size: 25px;
  }

  .supporting-metrics,
  .quality-strip {
    grid-template-columns: 1fr 1fr;
  }

  .support-metric,
  .quality-stat {
    min-height: 126px;
    border-bottom: 1px solid var(--line);
  }

  .support-metric:nth-child(2),
  .quality-stat:nth-child(2) {
    border-right: 0;
  }

  .support-metric:nth-last-child(-n + 1),
  .quality-stat:nth-last-child(-n + 2) {
    border-bottom: 0;
  }

  .support-metric:last-child {
    grid-column: 1 / -1;
    border-right: 0;
  }

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

  .journey-step {
    border-bottom: 1px solid var(--line);
  }

  .journey-step:nth-child(2n) {
    border-right: 0;
  }

  .journey-step:nth-last-child(-n + 2) {
    border-bottom: 0;
  }

  .chart-toolbar,
  .schedule-head,
  .privacy-band,
  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .chart-wrap {
    min-height: 250px;
    padding: 10px 8px 4px;
  }

  #chart {
    min-height: 230px;
    aspect-ratio: 1.55 / 1;
  }

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

  .day,
  .day:nth-child(7n),
  .day:nth-last-child(-n + 7) {
    min-height: 82px;
    border-right: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
  }

  .day:nth-child(2n) {
    border-right: 0;
  }

  .day:nth-last-child(-n + 2) {
    border-bottom: 0;
  }

  .source-row,
  .context-item {
    grid-template-columns: 1fr;
  }

  .context-value {
    width: 92px;
  }

  .site-footer {
    width: calc(100% - 26px);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}