/* AI Rebuilds: one stylesheet, no build step. Colors are tokens on :root. */

:root {
  --bg: #f6f3ec;
  --bg-raised: #fffdf8;
  --bg-sunken: #ece7dc;
  --ink: #1d1a16;
  --ink-soft: #57514a;
  --line: #d9d2c4;
  --accent: #c2410c;
  --accent-ink: #ffffff;
  --link: #9a3412;
  --focus: #2563eb;
  --grid-dot: rgba(29, 26, 22, 0.07);

  --s-proposed: #6b7280;
  --s-analysis: #7c3aed;
  --s-rebuilding: #b45309;
  --s-playable: #047857;
  --s-complete: #1d4ed8;

  --font-body: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --font-pixel: "Silkscreen", var(--font-mono);
  --radius: 6px;
  --wrap: 1080px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f1115;
    --bg-raised: #171a21;
    --bg-sunken: #0a0c0f;
    --ink: #ece8e1;
    --ink-soft: #a29d95;
    --line: #2a2f3a;
    --accent: #fb923c;
    --accent-ink: #1a0d03;
    --link: #fdba74;
    --focus: #93c5fd;
    --grid-dot: rgba(236, 232, 225, 0.06);
    --s-proposed: #9ca3af;
    --s-analysis: #c4b5fd;
    --s-rebuilding: #fbbf24;
    --s-playable: #6ee7b7;
    --s-complete: #93c5fd;
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #0f1115;
  --bg-raised: #171a21;
  --bg-sunken: #0a0c0f;
  --ink: #ece8e1;
  --ink-soft: #a29d95;
  --line: #2a2f3a;
  --accent: #fb923c;
  --accent-ink: #1a0d03;
  --link: #fdba74;
  --focus: #93c5fd;
  --grid-dot: rgba(236, 232, 225, 0.06);
  --s-proposed: #9ca3af;
  --s-analysis: #c4b5fd;
  --s-rebuilding: #fbbf24;
  --s-playable: #6ee7b7;
  --s-complete: #93c5fd;
  color-scheme: dark;
}

/* ---------- Base ---------- */

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

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

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg);
  background-image: radial-gradient(var(--grid-dot) 1px, transparent 1px);
  background-size: 22px 22px;
  color: var(--ink);
  font: 400 17px/1.6 var(--font-body);
  overflow-x: hidden;
}

main {
  flex: 1;
}

a {
  color: var(--link);
  text-underline-offset: 3px;
}

a:hover {
  text-decoration-thickness: 2px;
}

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

code,
pre {
  font-family: var(--font-mono);
  font-size: 0.88em;
}

code {
  background: var(--bg-sunken);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 0.05em 0.35em;
}

pre {
  background: var(--bg-sunken);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 16px;
  overflow-x: auto;
  line-height: 1.5;
}

pre code {
  background: none;
  border: 0;
  padding: 0;
  font-size: 1em;
}

h1,
h2,
h3 {
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 16px;
}

@media (min-width: 640px) {
  .wrap {
    padding: 0 28px;
  }
}

.muted {
  color: var(--ink-soft);
}

.skip {
  position: absolute;
  left: -999px;
}

.skip:focus {
  left: 16px;
  top: 12px;
  z-index: 10;
  background: var(--bg-raised);
  padding: 6px 10px;
}

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

.site-header {
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(6px);
  position: sticky;
  top: 0;
  z-index: 5;
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 60px;
  flex-wrap: wrap;
}

.logo {
  font-family: var(--font-pixel);
  font-size: 18px;
  color: var(--ink);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.logo-mark {
  color: var(--accent);
  font-size: 14px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 4px 18px;
  flex-wrap: wrap;
  font-size: 15px;
}

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

.nav a:hover,
.nav a[aria-current="page"] {
  color: var(--ink);
  text-decoration: underline;
}

.theme-toggle {
  background: none;
  border: 1px solid var(--line);
  color: var(--ink);
  border-radius: 999px;
  width: 32px;
  height: 32px;
  cursor: pointer;
  font-size: 16px;
  line-height: 1;
}

.site-footer {
  border-top: 1px solid var(--line);
  margin-top: 72px;
  padding: 24px 0 32px;
  font-size: 14px;
  color: var(--ink-soft);
}

.footer-row {
  display: flex;
  justify-content: space-between;
  gap: 8px 24px;
  flex-wrap: wrap;
}

.footer-row p {
  margin: 0;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-raised);
  color: var(--ink);
  font: 500 15px/1.2 var(--font-body);
  text-decoration: none;
  box-shadow: 0 2px 0 var(--line);
  transition: transform 0.08s ease, box-shadow 0.08s ease;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 3px 0 var(--line);
  text-decoration: none;
}

.btn:active {
  transform: translateY(1px);
  box-shadow: 0 1px 0 var(--line);
}

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
  box-shadow: 0 2px 0 color-mix(in srgb, var(--accent) 55%, black);
}

.btn-primary:hover {
  box-shadow: 0 3px 0 color-mix(in srgb, var(--accent) 55%, black);
}

/* ---------- Hero ---------- */

.hero {
  padding: 72px 0 56px;
}

.eyebrow {
  font-family: var(--font-pixel);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
  margin: 0 0 18px;
}

.hero h1 {
  font-size: clamp(2.1rem, 6vw, 3.6rem);
  margin: 0 0 20px;
  max-width: 16ch;
}

.accent {
  color: var(--accent);
}

.lede {
  font-size: 1.12rem;
  color: var(--ink-soft);
  max-width: 62ch;
  margin: 0 0 28px;
}

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

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

.section-title {
  font-family: var(--font-pixel);
  font-weight: 400;
  font-size: 20px;
  letter-spacing: 0.02em;
  margin: 0 0 22px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.how,
.projects,
.rules {
  padding-top: 40px;
}

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.steps li {
  background: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
}

.steps h3 {
  margin: 6px 0 8px;
  font-size: 1.08rem;
}

.steps p {
  margin: 0;
  font-size: 15px;
  color: var(--ink-soft);
}

.step-n {
  font-family: var(--font-pixel);
  color: var(--accent);
  font-size: 14px;
}

/* ---------- Projects ---------- */

.projects-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-end;
  gap: 12px 24px;
  margin-bottom: 20px;
}

.projects-head .section-title {
  margin: 0;
}

.count {
  font-family: var(--font-mono);
  font-size: 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 1px 9px;
  color: var(--ink-soft);
}

.filters {
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: 100%;
  max-width: 560px;
}

.search {
  width: 100%;
  font: inherit;
  font-size: 15px;
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-raised);
  color: var(--ink);
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.chip {
  font: 500 13px/1 var(--font-body);
  padding: 7px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink-soft);
  cursor: pointer;
}

.chip[aria-pressed="true"] {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--bg);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  transition: border-color 0.12s ease, transform 0.12s ease;
}

.card:hover {
  border-color: var(--ink-soft);
  transform: translateY(-2px);
}

.card[hidden] {
  display: none;
}

.card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.card-year {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-soft);
}

.card-title {
  margin: 6px 0 0;
  font-size: 1.15rem;
}

.card-title a {
  color: var(--ink);
  text-decoration: none;
}

/* Make the whole card clickable via the title link. */
.card-title a::after {
  content: "";
  position: absolute;
  inset: 0;
}

.card-meta {
  margin: 0;
  font-size: 14px;
  color: var(--ink-soft);
}

.card-summary {
  margin: 4px 0 0;
  font-size: 15px;
}

.card-help {
  margin: auto 0 0;
  padding-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
}

.card-new {
  border-style: dashed;
  background: transparent;
  text-decoration: none;
  color: var(--ink-soft);
  justify-content: center;
  align-items: flex-start;
  min-height: 170px;
}

.card-new .card-title {
  color: var(--ink);
  font-weight: 600;
}

.plus {
  font-family: var(--font-pixel);
  font-size: 28px;
  color: var(--accent);
  line-height: 1;
}

.empty {
  color: var(--ink-soft);
  padding: 24px 0;
}

/* ---------- Status badges ---------- */

.badge {
  --c: var(--s-proposed);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font: 600 11px/1 var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--c);
  border: 1px solid color-mix(in srgb, var(--c) 45%, transparent);
  background: color-mix(in srgb, var(--c) 10%, transparent);
  border-radius: 999px;
  padding: 5px 9px;
}

.badge::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 1px;
  background: var(--c);
}

.badge-analysis {
  --c: var(--s-analysis);
}
.badge-rebuilding {
  --c: var(--s-rebuilding);
}
.badge-playable {
  --c: var(--s-playable);
}
.badge-complete {
  --c: var(--s-complete);
}

/* ---------- Rules ---------- */

.rule-list {
  list-style: none;
  padding: 0;
  margin: 0 0 16px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 340px), 1fr));
  gap: 16px 32px;
}

.rule-list li {
  border-left: 3px solid var(--accent);
  padding: 2px 0 2px 14px;
  font-size: 15px;
  color: var(--ink-soft);
}

.rule-list strong {
  color: var(--ink);
  display: block;
}

/* ---------- Project page ---------- */

.project,
.page {
  padding-top: 32px;
}

.crumbs {
  margin: 0 0 20px;
  font-size: 14px;
}

.crumbs a {
  color: var(--ink-soft);
}

.project-head {
  display: grid;
  gap: 28px;
  grid-template-columns: 1fr;
  margin-bottom: 32px;
}

@media (min-width: 860px) {
  .project-head {
    grid-template-columns: 1fr 320px;
  }
}

.project-head h1,
.page-head h1 {
  font-size: clamp(2rem, 5vw, 2.8rem);
  margin: 0 0 12px;
}

.facts {
  margin: 0;
  background: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 6px 18px;
  font-size: 15px;
  align-self: start;
}

.facts > div {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
}

.facts > div:last-child {
  border-bottom: 0;
}

.facts dt {
  color: var(--ink-soft);
  flex-shrink: 0;
}

.facts dd {
  margin: 0;
  text-align: right;
}

.pipeline {
  list-style: none;
  margin: 0 0 36px;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  font: 500 12px/1.3 var(--font-mono);
  color: var(--ink-soft);
}

.pipeline li {
  position: relative;
  padding-top: 22px;
  text-align: center;
}

.pipeline li::before {
  content: "";
  position: absolute;
  top: 6px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--line);
}

.pipeline li.done::before {
  background: var(--accent);
}

.pipeline li:first-child::before {
  left: 50%;
}

.pipeline li:last-child::before {
  right: 50%;
}

.pipeline .dot {
  position: absolute;
  top: 0;
  left: 50%;
  width: 14px;
  height: 14px;
  margin-left: -7px;
  border-radius: 3px;
  background: var(--bg);
  border: 2px solid var(--line);
}

.pipeline li.done .dot {
  border-color: var(--accent);
  background: var(--accent);
}

.pipeline li.current {
  color: var(--ink);
  font-weight: 600;
}

.pipeline li.current .dot {
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 25%, transparent);
}

.help-wanted {
  background: var(--bg-raised);
  border: 1px dashed var(--accent);
  border-radius: var(--radius);
  padding: 18px 22px;
  margin-bottom: 36px;
}

.help-wanted h2 {
  font-family: var(--font-pixel);
  font-weight: 400;
  font-size: 16px;
  margin: 0 0 8px;
}

.help-wanted ul {
  margin: 0 0 8px;
  padding-left: 20px;
}

.help-wanted .muted {
  font-size: 14px;
  margin: 0;
}

/* ---------- Prose (markdown content) ---------- */

.prose {
  max-width: 74ch;
}

.prose h2 {
  margin: 2.2em 0 0.6em;
  font-size: 1.45rem;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--line);
}

.prose h3 {
  margin: 1.8em 0 0.5em;
  font-size: 1.15rem;
}

.prose table {
  border-collapse: collapse;
  width: 100%;
  font-size: 15px;
  display: block;
  overflow-x: auto;
}

.prose th,
.prose td {
  text-align: left;
  border-bottom: 1px solid var(--line);
  padding: 8px 12px 8px 0;
  vertical-align: top;
}

.prose blockquote {
  margin: 1.2em 0;
  padding: 4px 16px;
  border-left: 3px solid var(--accent);
  color: var(--ink-soft);
}

.prose img {
  max-width: 100%;
  height: auto;
}

.edit-link {
  margin-top: 48px;
  font-size: 14px;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .btn,
  .card {
    transition: none;
  }
}

@media (max-width: 480px) {
  .pipeline {
    font-size: 10px;
  }
}