/* Corrowen: a drafting-table specimen.
   Six palette tokens on :root, all in the hue 190 family.
   Headings use a geometric display stack; body text uses the system sans stack. */

:root {
  --c-paper: #f1f8f9;
  --c-ink: #0b2a31;
  --c-rail: #07323b;
  --c-accent: #0a6a7a;
  --c-mist: #d2eaef;
  --c-line: #86b9c3;

  --font-display: Futura, "Avenir Next", "Century Gothic", sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, Roboto, "Helvetica Neue", Arial, sans-serif;

  --gutter: 16px;
  --rail-width: clamp(220px, 21vw, 292px);
  --measure: 46rem;
  --wide: 62rem;
}

[hidden] { display: none !important; }

*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background-color: var(--c-paper);
  color: var(--c-ink);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

svg,
canvas { max-width: 100%; }

figure { margin: 0; }
dl { margin: 0; }
dd { margin: 0; }

/* Skip link */
.skip-link {
  position: absolute;
  left: var(--gutter);
  top: -3.5rem;
  z-index: 10;
  padding: .6rem 1rem;
  background-color: var(--c-accent);
  color: var(--c-paper);
  font-family: var(--font-display);
  font-weight: 500;
  text-decoration: none;
}
.skip-link:focus {
  top: var(--gutter);
  outline: 3px solid var(--c-ink);
  outline-offset: 2px;
}

/* App shell: persistent left rail, main working pane */
.app {
  display: grid;
  grid-template-columns: var(--rail-width) minmax(0, 1fr);
  min-height: 100vh;
}

.rail {
  position: sticky;
  top: 0;
  align-self: start;
  height: 100vh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  padding: 2.25rem 1.5rem;
  background-color: var(--c-rail);
  color: var(--c-paper);
}
.rail a { color: var(--c-paper); }
.rail a:focus-visible {
  outline: 3px solid var(--c-paper);
  outline-offset: 3px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .65rem;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.4rem;
  letter-spacing: .05em;
  text-decoration: none;
}
.brand-mark {
  width: 2.1rem;
  height: 2.1rem;
  flex: 0 0 auto;
}
.mark-petal { fill: var(--c-mist); }
.mark-core { fill: var(--c-paper); }

.rail-tag {
  margin: 0;
  font-size: .95rem;
  line-height: 1.5;
  color: var(--c-mist);
}

.rail-nav {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: .2rem;
}
.rail-nav a {
  display: block;
  min-height: 44px;
  padding: .6rem .9rem;
  border-left: 3px solid transparent;
  text-decoration: none;
  transition: background-color .2s ease, border-color .2s ease;
}
.rail-nav a:hover {
  background-color: var(--c-accent);
  border-left-color: var(--c-mist);
}
.rail-nav a[aria-current="page"] {
  background-color: var(--c-accent);
  border-left-color: var(--c-mist);
  font-weight: 600;
}

.rail-foot {
  margin: auto 0 0;
  padding-top: 1rem;
  border-top: 1px solid var(--c-line);
  font-size: .85rem;
  line-height: 1.5;
  color: var(--c-mist);
}

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

main {
  flex: 1 0 auto;
  padding: clamp(2.25rem, 5vw, 4.5rem) clamp(16px, 5vw, 5rem);
}

.page-head,
.section,
.prose {
  max-width: var(--measure);
}

.page-head {
  padding-bottom: clamp(1.5rem, 3vw, 2.5rem);
}

.section {
  padding: clamp(2.25rem, 4.5vw, 3.5rem) 0;
  border-top: 1px solid var(--c-line);
}
.section.wide { max-width: var(--wide); }

/* Type */
h1,
h2,
h3 {
  font-family: var(--font-display);
  font-weight: 500;
  color: var(--c-ink);
  line-height: 1.15;
  letter-spacing: -.01em;
}
h1 {
  margin: 0 0 1.25rem;
  font-size: clamp(2rem, 1.3rem + 3vw, 3.6rem);
  line-height: 1.06;
  letter-spacing: -.02em;
}
h2 {
  margin: 0 0 1rem;
  font-size: clamp(1.45rem, 1.1rem + 1.2vw, 2.05rem);
}
h3 {
  margin: 0 0 .5rem;
  font-size: clamp(1.1rem, 1rem + .4vw, 1.3rem);
}

p { margin: 0 0 1rem; }

ul,
ol {
  margin: 0 0 1rem;
  padding-left: 1.25rem;
}
li + li { margin-top: .45rem; }

a {
  color: var(--c-accent);
  text-decoration-thickness: 1px;
  text-underline-offset: .22em;
}
a:hover { text-decoration-thickness: 2px; }

strong { font-weight: 600; }

.eyebrow {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: .8rem;
  font-weight: 500;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--c-accent);
}

.lede {
  max-width: 40rem;
  font-size: clamp(1.1rem, 1rem + .45vw, 1.3rem);
  line-height: 1.55;
}

.fine-print {
  font-size: .9rem;
  line-height: 1.55;
}

/* Buttons and links */
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin: 1.5rem 0 0;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: .6rem 1.2rem;
  border: 2px solid var(--c-accent);
  background-color: var(--c-accent);
  color: var(--c-paper);
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: .02em;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  transition: background-color .2s ease, color .2s ease, border-color .2s ease;
}
.button:hover {
  background-color: var(--c-ink);
  border-color: var(--c-ink);
  color: var(--c-paper);
}
.button-quiet {
  background-color: transparent;
  color: var(--c-accent);
}
.button-quiet:hover {
  background-color: var(--c-mist);
  border-color: var(--c-accent);
  color: var(--c-ink);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--c-accent);
  outline-offset: 3px;
}

/* Callouts and lists */
.callout {
  margin: 1.5rem 0;
  padding: 1rem 1.2rem;
  background-color: var(--c-mist);
  border-left: 4px solid var(--c-accent);
  color: var(--c-ink);
}
.callout p:last-child { margin-bottom: 0; }

.terms {
  margin: 0;
}
.terms > div {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: .3rem 1.5rem;
  padding: 1.1rem 0;
  border-top: 1px solid var(--c-line);
}
.terms > div:last-child { border-bottom: 1px solid var(--c-line); }
.terms dt {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--c-ink);
}
.terms dd { margin: 0; }
@media (min-width: 40rem) {
  .terms > div { grid-template-columns: 14rem minmax(0, 1fr); }
}

.next-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.next-list li {
  margin: 0;
  padding: 1rem 0;
  border-top: 1px solid var(--c-line);
}
.next-list li:last-child { border-bottom: 1px solid var(--c-line); }
.next-list a {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 500;
}
.next-list p { margin: .3rem 0 0; }

.pair {
  display: grid;
  gap: 1.25rem;
  margin: 1rem 0 0;
}
.pair > div {
  padding-top: .9rem;
  border-top: 3px solid var(--c-accent);
}
@media (min-width: 40rem) {
  .pair { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 2rem; }
}

.address {
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 1rem + .8vw, 1.6rem);
  font-weight: 500;
  overflow-wrap: anywhere;
}

/* Guide: table of contents, chain diagram, fixed-number facts */
.toc {
  margin: 1.5rem 0 0;
  padding-top: 1rem;
  border-top: 1px solid var(--c-line);
}
.toc p {
  margin: 0 0 .6rem;
  font-family: var(--font-display);
  font-size: .8rem;
  font-weight: 500;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--c-accent);
}
.toc ul {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem 1.1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.toc li { margin: 0; }

.chain {
  max-width: 36rem;
  margin: 1.5rem 0;
}
.chain svg {
  display: block;
  width: 100%;
  height: auto;
}
.chain-block {
  fill: var(--c-mist);
  stroke: var(--c-accent);
  stroke-width: 2;
}
.chain-link {
  fill: none;
  stroke: var(--c-accent);
  stroke-width: 2;
}
.chain-head { fill: var(--c-accent); }
.chain-label {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 500;
  fill: var(--c-ink);
}
.chain-sub {
  font-family: var(--font-body);
  font-size: 13px;
  fill: var(--c-ink);
}

.facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 13rem), 1fr));
  margin: 1.5rem 0 0;
  border-top: 1px solid var(--c-line);
}
.facts > div {
  padding: 1.1rem 1rem 1.1rem 0;
  border-bottom: 1px solid var(--c-line);
}
.facts dt {
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 1.2rem + 1vw, 1.95rem);
  font-weight: 500;
  line-height: 1.15;
  color: var(--c-accent);
  overflow-wrap: anywhere;
}
.facts dd {
  margin: .35rem 0 0;
  font-size: .95rem;
}

/* FAQ disclosure widgets (native details, no script needed) */
.faq details {
  border-top: 1px solid var(--c-line);
}
.faq details:last-child { border-bottom: 1px solid var(--c-line); }
.faq summary {
  position: relative;
  display: block;
  min-height: 44px;
  padding: 1rem 2.5rem 1rem 0;
  cursor: pointer;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 500;
  list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  position: absolute;
  right: .25rem;
  top: .8rem;
  font-size: 1.6rem;
  line-height: 1;
  color: var(--c-accent);
}
.faq details[open] summary::after { content: "\2212"; }
.faq details > div { padding: 0 0 1.25rem; }
.faq details > div p:last-child { margin-bottom: 0; }

/* Seed Bloom studio */
.studio {
  margin-top: 2rem;
}
.studio-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
}
@media (min-width: 60rem) {
  .studio-grid { grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); }
}
.studio-stage {
  padding: clamp(10px, 2vw, 18px);
  background-color: var(--c-rail);
}
.studio-stage canvas {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  background-color: var(--c-rail);
}
.field {
  margin: 0 0 1.25rem;
}
.field label {
  display: block;
  margin: 0 0 .3rem;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 500;
}
.field-hint {
  margin: 0 0 .6rem;
  font-size: .92rem;
}
input[type="text"] {
  display: block;
  width: 100%;
  min-height: 48px;
  padding: .65rem .9rem;
  border: 2px solid var(--c-accent);
  border-radius: 0;
  background-color: var(--c-paper);
  color: var(--c-ink);
  font: inherit;
  font-size: 1.05rem;
  appearance: none;
  -webkit-appearance: none;
}
.studio-status {
  min-height: 3.2rem;
  margin: 1.25rem 0;
  padding: .8rem 1rem;
  background-color: var(--c-mist);
  border-left: 4px solid var(--c-accent);
  color: var(--c-ink);
}
.readout {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0 0 1.25rem;
  border: 1px solid var(--c-line);
  background-color: var(--c-line);
}
.readout > div {
  margin: 0;
  padding: .8rem .95rem;
  background-color: var(--c-paper);
}
.readout dt {
  margin: 0 0 .2rem;
  font-family: var(--font-display);
  font-size: .78rem;
  font-weight: 500;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--c-accent);
}
.readout dd {
  font-size: 1.2rem;
  font-variant-numeric: tabular-nums;
  color: var(--c-ink);
  overflow-wrap: anywhere;
}

/* Static sample bloom (visible with or without scripting) */
.sample {
  max-width: 30rem;
  margin: 0 0 1.5rem;
}
.sample svg {
  display: block;
  width: 100%;
  height: auto;
  background-color: var(--c-rail);
}
.sample figcaption {
  margin-top: .7rem;
  font-size: .92rem;
}
.sample-ring {
  fill: none;
  stroke: var(--c-line);
  stroke-width: 1.5;
}
.sample-dot-a { fill: var(--c-paper); }
.sample-dot-b { fill: var(--c-line); }
.sample-petal-a {
  fill: var(--c-mist);
  stroke: var(--c-paper);
  stroke-width: 1.5;
}
.sample-petal-b {
  fill: var(--c-line);
  stroke: var(--c-paper);
  stroke-width: 1.5;
}
.sample-core {
  fill: var(--c-accent);
  stroke: var(--c-paper);
  stroke-width: 3;
}
.sample-petals {
  animation: drift 9s ease-in-out infinite;
}
@keyframes drift {
  0%,
  100% { opacity: 1; }
  50% { opacity: .72; }
}

/* Footer */
.site-foot {
  padding: 1.5rem clamp(16px, 5vw, 5rem) 2rem;
  border-top: 1px solid var(--c-line);
  font-size: .9rem;
}
.site-foot p {
  max-width: 46rem;
  margin: 0;
}

/* Phones and small tablets: the rail becomes a top band */
@media (max-width: 759px) {
  .app { grid-template-columns: minmax(0, 1fr); }

  .rail {
    position: static;
    height: auto;
    overflow: visible;
    gap: 1rem;
    padding: 1.25rem var(--gutter) 1.1rem;
  }
  .brand { font-size: 1.25rem; }
  .rail-tag { font-size: .9rem; }

  .rail-nav {
    flex-direction: row;
    flex-wrap: wrap;
    gap: .25rem;
  }
  .rail-nav a {
    padding: .55rem .75rem;
    border-left: 0;
    border-bottom: 3px solid transparent;
  }
  .rail-nav a:hover,
  .rail-nav a[aria-current="page"] {
    border-bottom-color: var(--c-mist);
    border-left-color: transparent;
  }

  main { padding: 2rem var(--gutter) 3rem; }
  .site-foot { padding: 1.5rem var(--gutter); }
}

/* Reduced motion: every transition and animation has a static form */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .rail-nav a,
  .button { transition: none; }
  .sample-petals { animation: none; }
}