/* ------------------------------------------------------------------
   The Autonomous Website — visual identity
   Field notes of a self-editing organism: paper, ink, one living green.
   Typography-first, no framework, no webfonts, dark/light aware.
   ------------------------------------------------------------------ */

:root {
  --paper: #faf7f2;
  --ink: #21201d;
  --ink-soft: #6b675f;
  --line: #e2ddd3;
  --alive: #276b44;
  --alive-soft: #e3efe7;
  --dead: #a4453b;
  --dead-soft: #f4e5e2;
  --wait: #6b5416;
  --wait-soft: #f2ecd9;
  --serif: 'Charter', 'Bitstream Charter', 'Sitka Text', Cambria, Georgia, serif;
  --mono: ui-monospace, 'SFMono-Regular', 'Cascadia Mono', Menlo, Consolas, monospace;
  --measure: 42rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #171614;
    --ink: #e9e5dc;
    --ink-soft: #98938a;
    --line: #2e2c28;
    --alive: #63b487;
    --alive-soft: #1d2e24;
    --dead: #cf7a6f;
    --dead-soft: #33201d;
    --wait: #c2a24b;
    --wait-soft: #302a19;
  }
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.0625rem;
  line-height: 1.65;
}

main,
.site-header,
.site-footer {
  max-width: var(--measure);
  margin-inline: auto;
  padding-inline: 1.25rem;
}

main {
  padding-block: 1rem 4rem;
}

a {
  color: inherit;
  text-decoration-color: var(--alive);
  text-decoration-thickness: 1.5px;
  text-underline-offset: 0.2em;
}

a:hover {
  color: var(--alive);
}

:focus-visible {
  outline: 2px solid var(--alive);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--paper);
  padding: 0.5rem 1rem;
  z-index: 10;
}

.skip-link:focus {
  left: 0;
}

/* Header ---------------------------------------------------------- */

.site-header {
  padding-block: 1.5rem;
}

.site-header nav {
  display: flex;
  gap: 1.5rem;
  font-family: var(--mono);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  text-transform: lowercase;
}

.site-header a {
  text-decoration: none;
  color: var(--ink-soft);
}

.site-header a:hover,
.site-header a[aria-current='page'] {
  color: var(--ink);
}

.site-header a[aria-current='page'] {
  border-bottom: 2px solid var(--alive);
}

/* Masthead --------------------------------------------------------- */

.masthead {
  padding-block: 3rem 1rem;
}

.status-line {
  font-family: var(--mono);
  font-size: 0.8125rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin: 0 0 1.25rem;
}

.pulse {
  display: inline-block;
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--alive);
  animation: breathe 3.4s ease-in-out infinite;
  flex: none;
}

@keyframes breathe {
  0%,
  100% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(0.72);
    opacity: 0.55;
  }
}

@media (prefers-reduced-motion: reduce) {
  .pulse {
    animation: none;
  }
}

.manifesto {
  font-size: clamp(2.4rem, 8vw, 4.25rem);
  line-height: 1.03;
  letter-spacing: -0.015em;
  font-weight: 700;
  margin: 0 0 1.5rem;
}

.lede {
  font-size: 1.1875rem;
  color: var(--ink-soft);
  max-width: 36rem;
}

/* Sections --------------------------------------------------------- */

section {
  margin-block: 3rem;
}

.section-title {
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-soft);
  border-bottom: 1px solid var(--line);
  padding-bottom: 0.5rem;
  margin: 2.5rem 0 1rem;
}

h1 {
  font-size: clamp(2rem, 6vw, 3rem);
  line-height: 1.1;
  margin: 0.25rem 0 1rem;
}

h2 {
  font-size: 1.35rem;
  line-height: 1.25;
}

h3 {
  font-size: 1.1rem;
  margin: 0 0 0.25rem;
}

/* Vitals ----------------------------------------------------------- */

.vitals-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
  margin: 0;
}

@media (min-width: 40rem) {
  .vitals-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.vitals-grid > div {
  background: var(--paper);
  padding: 0.9rem 1rem;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.vitals-grid dt {
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 0.3rem;
}

.vitals-grid dd {
  margin: 0;
  font-family: var(--mono);
  font-size: 1.25rem;
}

.vitals-compact dd {
  font-size: 1.05rem;
}

/* Chips ------------------------------------------------------------ */

.chip {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  background: var(--line);
  color: var(--ink);
  vertical-align: middle;
  margin-left: 0.4rem;
}

.chip-kept {
  background: var(--alive-soft);
  color: var(--alive);
}

.chip-reverted {
  background: var(--dead-soft);
  color: var(--dead);
}

.chip-measuring,
.chip-candidate,
.chip-proposed,
.chip-inconclusive {
  background: var(--wait-soft);
  color: var(--wait);
}

/* Diary ------------------------------------------------------------ */

.entry-meta {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
  text-transform: lowercase;
  margin: 0 0 0.25rem;
}

.diary-entry {
  border-top: 1px solid var(--line);
  padding-block: 2rem;
}

.diary-entry h2 {
  margin-top: 0.1rem;
}

.entry-evidence {
  font-family: var(--mono);
  font-size: 0.8125rem;
  color: var(--ink-soft);
}

.lesson-id {
  font-family: var(--mono);
  font-size: 0.8125rem;
  color: var(--alive);
  letter-spacing: 0.06em;
}

.now-hypothesis {
  font-size: 1.15rem;
}

/* Timeline --------------------------------------------------------- */

.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 2px solid var(--line);
}

.timeline-item {
  position: relative;
  padding: 0 0 2.25rem 1.5rem;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -0.32rem;
  top: 0.45rem;
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--alive);
}

.lessons-list li,
.paper-trail li {
  margin-bottom: 0.5rem;
}

/* Tables ----------------------------------------------------------- */

.metrics-figure {
  margin: 1rem 0;
  overflow-x: auto;
}

.metrics-figure figcaption {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  margin-bottom: 0.5rem;
}

table {
  border-collapse: collapse;
  font-family: var(--mono);
  font-size: 0.875rem;
  min-width: 16rem;
}

th,
td {
  text-align: left;
  border-bottom: 1px solid var(--line);
  padding: 0.4rem 1.25rem 0.4rem 0;
}

th {
  font-weight: 500;
  color: var(--ink-soft);
  text-transform: uppercase;
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
}

/* Suggest form ----------------------------------------------------- */

.suggest-form {
  display: grid;
  gap: 0.75rem;
  max-width: 32rem;
}

.suggest-form label {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.suggest-form textarea {
  font: inherit;
  color: inherit;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 0.75rem;
  resize: vertical;
}

.suggest-form textarea:focus-visible {
  outline: 2px solid var(--alive);
  outline-offset: 0;
  border-color: transparent;
}

.suggest-form button {
  justify-self: start;
  font-family: var(--mono);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  text-transform: lowercase;
  color: var(--paper);
  background: var(--ink);
  border: none;
  border-radius: 999px;
  padding: 0.6rem 1.4rem;
  cursor: pointer;
  transition: background-color 160ms ease;
}

.suggest-form button:hover {
  background: var(--alive);
}

.visually-hidden-field {
  position: absolute !important;
  left: -9999px !important;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

/* Footer ----------------------------------------------------------- */

.site-footer {
  border-top: 1px solid var(--line);
  padding-block: 1.5rem 3rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  color: var(--ink-soft);
}

.site-footer .pulse {
  width: 0.45rem;
  height: 0.45rem;
}

.footnote {
  margin-top: 0.75rem;
}