:root {
  color-scheme: light;
  --ink: oklch(24% 0.02 236);
  --muted: oklch(46% 0.02 236);
  --soft: oklch(63% 0.018 236);
  --paper: oklch(97.2% 0.008 85);
  --paper-deep: oklch(93.8% 0.014 85);
  --panel: oklch(99% 0.004 85);
  --panel-strong: oklch(95.8% 0.01 85);
  --line: oklch(83% 0.016 85);
  --accent: oklch(40% 0.07 226);
  --accent-soft: oklch(92% 0.022 226);
  --teal: oklch(54% 0.09 196);
  --brass: oklch(73% 0.085 74);
  --warn: oklch(68% 0.12 72);
  --good: oklch(55% 0.11 154);
  --bad: oklch(58% 0.13 28);
  --shadow: 0 20px 56px oklch(22% 0.02 236 / 0.12);
  --radius: 22px;
  --radius-sm: 14px;
  font-family: "Avenir Next", "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 0 0, oklch(99% 0.016 84), transparent 28%),
    radial-gradient(circle at 92% 16%, oklch(95% 0.03 220), transparent 20%),
    linear-gradient(180deg, oklch(95.8% 0.014 85), var(--paper) 420px);
  font-size: 16px;
  line-height: 1.58;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(oklch(80% 0.012 236 / 0.08) 1px, transparent 1px),
    linear-gradient(90deg, oklch(80% 0.012 236 / 0.08) 1px, transparent 1px);
  background-size: 26px 26px;
  mask-image: linear-gradient(180deg, black, transparent 76%);
  pointer-events: none;
}

a {
  color: inherit;
}

img {
  display: block;
  max-width: 100%;
}

button,
input,
select,
textarea {
  font: inherit;
}

button,
.button {
  min-height: 46px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel);
  color: var(--ink);
  padding: 0 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  text-decoration: none;
  cursor: pointer;
  transition: transform 180ms ease-out, background 180ms ease-out, border-color 180ms ease-out;
}

button:hover,
.button:hover {
  background: var(--paper-deep);
  border-color: oklch(77% 0.024 85);
}

button:active,
.button:active {
  transform: translateY(1px);
}

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

button:focus-visible,
.button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
summary:focus-visible {
  outline: 3px solid oklch(70% 0.065 214 / 0.38);
  outline-offset: 2px;
}

.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: oklch(98.5% 0.005 85);
}

.primary:hover {
  background: oklch(35% 0.068 226);
  border-color: oklch(35% 0.068 226);
}

.ghost {
  background: transparent;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: oklch(98.2% 0.006 85 / 0.9);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid oklch(84% 0.014 85 / 0.9);
}

.nav,
main,
.footer-inner {
  max-width: 1180px;
  margin: 0 auto;
}

.nav {
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background:
    linear-gradient(145deg, oklch(42% 0.08 226), oklch(34% 0.05 206)),
    var(--accent);
  color: oklch(98.5% 0.005 85);
  display: grid;
  place-items: center;
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.06em;
}

.brand-lockup {
  display: grid;
  gap: 2px;
}

.brand-lockup strong {
  font-size: 0.98rem;
}

.brand-lockup span {
  font-size: 0.8rem;
  color: var(--muted);
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 6px;
}

.nav-links a {
  min-height: 38px;
  padding: 0 12px;
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  color: var(--muted);
  border-radius: 999px;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  background: var(--accent-soft);
  color: var(--ink);
}

main {
  padding: 28px 20px 72px;
  position: relative;
}

.home-hero,
.page-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  gap: 28px;
  align-items: start;
}

.home-hero {
  min-height: calc(100vh - 112px);
  padding-top: 8px;
}

.hero-copy,
.hero-rail {
  display: grid;
  gap: 18px;
}

.eyebrow {
  margin: 0;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-weight: 700;
  font-size: 0.77rem;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.07;
  letter-spacing: -0.02em;
  font-family: "Iowan Old Style", "Palatino Linotype", Georgia, serif;
}

h1 {
  font-size: clamp(2.9rem, 6vw, 5.2rem);
  max-width: 10ch;
}

h2 {
  font-size: clamp(1.7rem, 3vw, 2.6rem);
}

h3 {
  font-size: 1.2rem;
}

p {
  margin: 0;
}

.lede,
.section-copy p,
.page-copy p {
  color: var(--muted);
}

.lede {
  font-size: 1.08rem;
  max-width: 66ch;
}

.hero-actions,
.inline-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.signal-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.signal,
.rail-card,
.tool-shell,
.utility-tile,
.content-panel,
.faq-item,
.mini-panel {
  border: 1px solid var(--line);
  background: oklch(99% 0.004 85 / 0.96);
  box-shadow: var(--shadow);
}

.signal {
  border-radius: var(--radius-sm);
  padding: 16px;
  display: grid;
  gap: 8px;
}

.signal strong {
  font-size: 1.7rem;
  font-family: "SF Mono", "Cascadia Code", monospace;
}

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

.rail-card {
  border-radius: var(--radius);
  padding: 22px;
  display: grid;
  gap: 16px;
}

.stamp {
  width: fit-content;
  padding: 7px 12px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 700;
}

.data-stack {
  display: grid;
  gap: 12px;
}

.data-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

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

.data-row span {
  color: var(--muted);
}

.data-row strong {
  font-size: 1.1rem;
  font-family: "SF Mono", "Cascadia Code", monospace;
}

.section {
  padding-top: 56px;
}

.section-copy,
.page-copy {
  display: grid;
  gap: 10px;
  margin-bottom: 20px;
}

.tool-shell {
  border-radius: calc(var(--radius) + 2px);
  padding: 22px;
  display: grid;
  gap: 18px;
}

.tool-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: start;
}

.tool-head p {
  color: var(--muted);
  max-width: 64ch;
}

.tool-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(320px, 0.98fr);
  gap: 18px;
}

.form-panel,
.result-panel {
  display: grid;
  gap: 16px;
}

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

.field {
  display: grid;
  gap: 7px;
}

.field.full,
.span-2 {
  grid-column: 1 / -1;
}

.field label,
.group-title,
.check-row label {
  font-weight: 600;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  min-height: 48px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
  color: var(--ink);
  padding: 12px 14px;
}

.field textarea {
  min-height: 120px;
  resize: vertical;
}

.hint,
.inline-note,
.field small,
.list-copy,
.formula-line {
  color: var(--muted);
  font-size: 0.92rem;
}

.group-title {
  grid-column: 1 / -1;
  padding-top: 4px;
}

.check-row {
  min-height: 48px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
  padding: 10px 12px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.check-row input {
  width: 18px;
  height: 18px;
  margin: 0;
}

.details-block {
  border: 1px dashed oklch(78% 0.02 85);
  border-radius: 18px;
  padding: 14px 16px 16px;
  background: oklch(98.7% 0.006 85);
}

.details-block summary {
  cursor: pointer;
  font-weight: 700;
}

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

.status-pill {
  width: fit-content;
  padding: 7px 12px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 700;
  background: var(--accent-soft);
  color: var(--accent);
}

.status-pill.good {
  background: oklch(92% 0.03 154);
  color: oklch(40% 0.09 154);
}

.status-pill.warn {
  background: oklch(94% 0.03 78);
  color: oklch(43% 0.09 78);
}

.status-pill.bad {
  background: oklch(92% 0.034 28);
  color: oklch(44% 0.1 28);
}

.metric-large,
.result-card,
.fact-strip {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--panel);
  padding: 16px;
}

.metric-large {
  display: grid;
  gap: 10px;
}

.metric-large span,
.kpi span,
.result-card .label {
  color: var(--muted);
  font-size: 0.9rem;
}

.metric-large strong {
  font-size: clamp(2rem, 4vw, 3rem);
  font-family: "SF Mono", "Cascadia Code", monospace;
}

.meter {
  height: 10px;
  border-radius: 999px;
  background: oklch(92% 0.012 85);
  overflow: hidden;
}

.meter::after {
  content: "";
  display: block;
  height: 100%;
  width: var(--value, 50%);
  background: linear-gradient(90deg, var(--teal), var(--accent));
}

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.kpi {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--panel);
  padding: 14px;
  display: grid;
  gap: 6px;
}

.kpi strong {
  font-size: 1.15rem;
  font-family: "SF Mono", "Cascadia Code", monospace;
}

.fact-strip {
  display: grid;
  gap: 10px;
}

.fact-strip strong {
  font-size: 1rem;
}

.scenario-wrap,
.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 580px;
}

th,
td {
  padding: 11px 10px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
}

.insights-list,
.checklist,
.simple-list {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 10px;
}

.utility-grid,
.content-grid,
.panel-grid,
.link-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.utility-tile,
.content-panel,
.mini-panel {
  border-radius: 20px;
  padding: 18px;
  display: grid;
  gap: 10px;
  text-decoration: none;
}

.utility-tile p,
.content-panel p,
.mini-panel p {
  color: var(--muted);
}

.content-panel strong {
  font-family: "SF Mono", "Cascadia Code", monospace;
  font-size: 0.95rem;
}

.faq-stack {
  display: grid;
  gap: 12px;
}

.faq-item {
  border-radius: 18px;
  padding: 0 18px;
}

.faq-item summary {
  list-style: none;
  cursor: pointer;
  font-weight: 700;
  padding: 18px 0;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item p,
.faq-item ul {
  color: var(--muted);
  padding-bottom: 18px;
}

.formula-band {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(145deg, oklch(98.7% 0.006 85), oklch(95.8% 0.012 220));
  padding: 18px 20px;
  display: grid;
  gap: 8px;
}

.formula-band strong {
  font-size: 1.15rem;
  font-family: "SF Mono", "Cascadia Code", monospace;
}

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

.page-list a {
  color: var(--accent);
}

.footer {
  border-top: 1px solid var(--line);
  background: oklch(96.5% 0.009 85);
}

.footer-inner {
  padding: 18px 20px 28px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
}

.footer-inner a {
  text-decoration: none;
}

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

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 980px) {
  .home-hero,
  .page-hero,
  .tool-grid,
  .utility-grid,
  .content-grid,
  .panel-grid,
  .link-grid {
    grid-template-columns: 1fr;
  }

  .signal-strip {
    grid-template-columns: 1fr;
  }

  .field-grid,
  .details-grid,
  .kpi-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  body {
    font-size: 15px;
  }

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

  .nav-links {
    justify-content: flex-start;
  }

  .home-hero {
    min-height: auto;
  }

  main {
    padding: 22px 16px 64px;
  }

  .nav,
  .footer-inner {
    padding-left: 16px;
    padding-right: 16px;
  }

  .tool-shell,
  .rail-card,
  .utility-tile,
  .content-panel,
  .mini-panel {
    border-radius: 18px;
  }

  .tool-head {
    flex-direction: column;
  }

  h1 {
    font-size: clamp(2.4rem, 10vw, 3.6rem);
  }

  table {
    min-width: 520px;
  }
}