/* ============================================================
   ACEQUIA PROTOCOL — shared stylesheet (overview + spec)
   Standalone identity: sand/teal/terracotta, Fraunces + Source Sans 3.
   Page scopes: body.acequia-home (overview), body.acequia-spec (spec).
   ============================================================ */

:root {
  --sand: #f6f1e8;
  --cream: #fffdf8;
  --ink: #1e2a24;
  --muted: #5c6b62;
  --teal: #1a6b5c;
  --teal-deep: #0f4a40;
  --terracotta: #c45c3a;
  --terracotta-soft: #e8a88e;
  --sky: #7eb8c9;
  --water: #3d8b9e;
  --gold: #c9a227;
  --line: rgba(30, 42, 36, 0.12);
  --shadow: 0 18px 50px rgba(30, 42, 36, 0.08);
  --radius: 18px;
  --sidebar: 260px;
}
body.acequia-spec {
  --shadow: 0 12px 36px rgba(30, 42, 36, 0.07);
  --radius: 14px;
}

/* ---------- base ---------- */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 88px; }
body {
  font-family: "Source Sans 3", -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--sand);
  color: var(--ink);
  line-height: 1.65;
  font-size: 1.05rem;
}
body.acequia-spec { font-size: 1rem; }
h1, h2, h3, h4 {
  font-family: Fraunces, Georgia, serif;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--teal-deep);
}
a { color: var(--teal); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--terracotta); }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

/* ---------- top nav (shared shell) ---------- */
nav.top {
  position: sticky; top: 0; z-index: 200;
  background: rgba(246, 241, 232, 0.93);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
nav.top .wrap,
nav.top .bar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 14px; position: relative;
}
nav.top .wrap { padding-top: 14px; padding-bottom: 14px; }
nav.top .bar { max-width: 1280px; margin: 0 auto; padding: 12px 24px; }
.logo {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: Fraunces, serif;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--teal-deep);
  text-decoration: none;
  white-space: nowrap;
}
.logo img { width: 34px; height: 34px; flex-shrink: 0; }
.menu-btn {
  display: none;
  border: 1px solid var(--line);
  background: var(--cream);
  border-radius: 999px;
  padding: 8px 14px;
  font-family: inherit;
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--teal-deep);
  cursor: pointer;
  flex-shrink: 0;
}
.badge {
  display: inline-block; font-size: 0.72rem; font-weight: 700;
  letter-spacing: 0.08em; text-transform: uppercase;
  background: var(--teal); color: #fff; padding: 4px 10px; border-radius: 999px;
  white-space: nowrap;
}

/* overview nav links */
.nav-links { display: flex; gap: 14px; flex-wrap: nowrap; align-items: center; }
.nav-links a {
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--muted);
  white-space: nowrap;
}
.nav-links a:hover { color: var(--teal); }
@media (max-width: 1080px) {
  nav.top .wrap { flex-wrap: nowrap; gap: 12px; }
  .acequia-home .logo { flex: 1; min-width: 0; font-size: 1.02rem; }
  .acequia-home .menu-btn { display: inline-flex; align-items: center; }
  .nav-links {
    display: none;
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    background: rgba(255, 253, 248, 0.98);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 8px;
    box-shadow: var(--shadow);
  }
  .nav-links.open { display: flex; }
  .nav-links a {
    white-space: normal;
    padding: 11px 14px;
    border-radius: 10px;
  }
  .nav-links a:hover { background: rgba(26, 107, 92, 0.07); }
}

/* spec nav links */
.nav-right { display: flex; gap: 18px; align-items: center; flex-wrap: nowrap; }
.nav-right a {
  text-decoration: none; font-weight: 600; font-size: 0.9rem; color: var(--muted);
  white-space: nowrap;
}
.nav-right a:hover { color: var(--teal); }
@media (max-width: 900px) {
  nav.top .bar { flex-wrap: nowrap; }
  .acequia-spec .logo { flex: 1; min-width: 0; font-size: 1.02rem; }
  .acequia-spec .menu-btn { display: inline-flex; align-items: center; }
  .nav-right {
    display: none;
    position: absolute;
    top: calc(100% + 8px);
    left: 24px;
    right: 24px;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    background: rgba(255, 253, 248, 0.98);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 8px;
    box-shadow: var(--shadow);
  }
  .nav-right.open { display: flex; }
  .nav-right a, .nav-right .badge {
    white-space: normal;
    padding: 11px 14px;
    border-radius: 10px;
    text-align: left;
  }
  .nav-right a:hover { background: rgba(26, 107, 92, 0.07); }
  .nav-right .badge { align-self: flex-start; }
}

/* ---------- overview: hero ---------- */
.hero {
  padding: 72px 0 56px;
  background:
    radial-gradient(ellipse 80% 60% at 70% 0%, rgba(126, 184, 201, 0.25), transparent),
    radial-gradient(ellipse 50% 40% at 10% 80%, rgba(196, 92, 58, 0.12), transparent),
    var(--sand);
}
.eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--terracotta);
  margin-bottom: 14px;
}
.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.35rem);
  margin-bottom: 20px;
}
.hero-lead {
  font-size: 1.2rem;
  color: var(--muted);
  max-width: 34em;
  margin-bottom: 28px;
}
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-single { max-width: 820px; }
.hero-photo {
  margin-top: 40px;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  background: #111;
}
.hero-photo img {
  width: 100%;
  height: min(52vh, 480px);
  object-fit: cover;
  display: block;
}
.hero-photo figcaption {
  padding: 12px 16px;
  font-size: 0.82rem;
  color: var(--muted);
  background: var(--cream);
  border-top: 1px solid var(--line);
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 22px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.95rem;
  text-decoration: none;
  transition: transform 0.15s, box-shadow 0.15s;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: var(--teal);
  color: #fff;
  box-shadow: 0 8px 24px rgba(26, 107, 92, 0.28);
}
.btn-primary:hover { color: #fff; background: var(--teal-deep); }
.btn-secondary {
  background: var(--cream);
  color: var(--teal-deep);
  border: 2px solid var(--line);
}

/* ---------- overview: sections & cards ---------- */
.acequia-home section { padding: 72px 0; }
.acequia-home section.alt { background: var(--cream); }
.section-label {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--water);
  margin-bottom: 10px;
}
.section-title {
  font-size: clamp(1.75rem, 3.5vw, 2.4rem);
  margin-bottom: 16px;
  max-width: 18em;
}
.section-intro {
  color: var(--muted);
  max-width: 42em;
  margin-bottom: 40px;
  font-size: 1.1rem;
}
.card {
  background: var(--cream);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 30px;
  box-shadow: var(--shadow);
}
.alt .card { background: #fff; }
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}
@media (max-width: 720px) { .two-col { grid-template-columns: 1fr; } }

/* ---------- overview: diagrams ---------- */
.diagram {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  overflow: hidden;
}
.diagram svg { width: 100%; height: auto; display: block; }
.diagram-caption {
  margin-top: 14px;
  font-size: 0.88rem;
  color: var(--muted);
  text-align: center;
}
.tech-diagram {
  background: #fafaf8;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 24px;
}
.tech-diagram svg { width: 100%; height: auto; display: block; }
.tech-diagram svg text.mono {
  font-family: "JetBrains Mono", "SF Mono", "Menlo", "Consolas", monospace;
  font-size: 10px;
  letter-spacing: 0.04em;
}

/* ---------- overview: roles, power, timeline ---------- */
.role-list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}
.role-list li {
  padding: 16px 18px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
}
.role-list strong {
  display: block;
  color: var(--teal-deep);
  font-size: 0.95rem;
  margin-bottom: 4px;
}
.role-list span { color: var(--muted); font-size: 0.95rem; }
.power-combined {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow);
}
.power-duo {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  margin-bottom: 32px;
}
@media (max-width: 720px) { .power-duo { grid-template-columns: 1fr; } }
.power-duo h3 {
  font-size: 1.15rem;
  margin-bottom: 10px;
}
.power-duo p { color: var(--muted); font-size: 0.98rem; }
.library-timeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 28px;
}
@media (max-width: 860px) { .library-timeline { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .library-timeline { grid-template-columns: 1fr; } }
.library-era {
  padding: 20px 18px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
}
.library-era .era-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--water);
  margin-bottom: 8px;
}
.library-era h4 {
  font-size: 1rem;
  margin-bottom: 8px;
}
.library-era p { font-size: 0.9rem; color: var(--muted); }

/* ---------- overview: comparison bars ---------- */
.compare-row {
  display: grid;
  grid-template-columns: 140px 1fr 1fr;
  gap: 12px;
  align-items: center;
  margin-bottom: 14px;
  font-size: 0.92rem;
}
@media (max-width: 600px) { .compare-row { grid-template-columns: 1fr; } }
.bar-wrap {
  height: 28px;
  background: rgba(30, 42, 36, 0.06);
  border-radius: 8px;
  overflow: hidden;
}
.bar {
  height: 100%;
  border-radius: 8px;
  display: flex;
  align-items: center;
  padding-left: 10px;
  font-size: 0.75rem;
  font-weight: 700;
  color: #fff;
  min-width: 2.5em;
}
.bar-industrial { background: linear-gradient(90deg, #8b3a2a, #c45c3a); }
.bar-community { background: linear-gradient(90deg, var(--teal), var(--sky)); }

/* ---------- overview: steps & quote ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  counter-reset: step;
}
@media (max-width: 860px) { .steps { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .steps { grid-template-columns: 1fr; } }
.step {
  position: relative;
  padding: 22px 18px 18px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
}
.step::before {
  counter-increment: step;
  content: counter(step);
  display: inline-flex;
  width: 28px; height: 28px;
  align-items: center; justify-content: center;
  background: var(--teal);
  color: #fff;
  font-weight: 700;
  font-size: 0.85rem;
  border-radius: 50%;
  margin-bottom: 12px;
}
.step h4 {
  font-size: 1rem;
  margin-bottom: 6px;
}
.step p { font-size: 0.88rem; color: var(--muted); }
.quote-block {
  border-left: 4px solid var(--terracotta);
  padding: 20px 28px;
  background: rgba(196, 92, 58, 0.06);
  border-radius: 0 14px 14px 0;
  font-size: 1.15rem;
  font-family: Fraunces, serif;
  color: var(--teal-deep);
  margin: 32px 0;
}

/* ---------- overview: footer ---------- */
.acequia-home footer {
  padding: 48px 0 56px;
  background: var(--teal-deep);
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.92rem;
}
.acequia-home footer h3 {
  color: #fff;
  font-size: 1.3rem;
  margin-bottom: 10px;
}
.acequia-home footer a { color: var(--terracotta-soft); }
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 32px;
}
@media (max-width: 720px) { .footer-grid { grid-template-columns: 1fr; } }

/* ---------- spec: layout & sidebar TOC ---------- */
.layout {
  max-width: 1280px; margin: 0 auto;
  display: grid; grid-template-columns: var(--sidebar) 1fr;
  gap: 40px; padding: 32px 24px 80px;
}
@media (max-width: 960px) {
  .layout { grid-template-columns: 1fr; }
  aside.toc { display: none; }
}
aside.toc {
  position: sticky; top: 72px; align-self: start;
  max-height: calc(100vh - 96px); overflow-y: auto;
  padding-right: 8px;
}
aside.toc h2 {
  font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.1em;
  color: var(--water); margin-bottom: 12px;
  font-family: "Source Sans 3", sans-serif; font-weight: 700;
}
aside.toc ol { list-style: none; font-size: 0.88rem; line-height: 1.4; }
aside.toc li { margin-bottom: 6px; }
aside.toc a { text-decoration: none; color: var(--muted); font-weight: 500; }
aside.toc a:hover { color: var(--teal); }
aside.toc .sub { padding-left: 14px; margin-top: 4px; font-size: 0.82rem; }

/* ---------- spec: mobile contents block ---------- */
.toc-mobile { display: none; margin-bottom: 28px; }
@media (max-width: 960px) { .toc-mobile { display: block; } }
.toc-mobile details {
  background: var(--cream);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 18px;
}
.toc-mobile summary {
  font-weight: 700;
  color: var(--teal-deep);
  cursor: pointer;
}
.toc-mobile ol {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  font-size: 0.92rem;
}
.toc-mobile li { margin-bottom: 8px; }
.toc-mobile a { text-decoration: none; color: var(--muted); font-weight: 500; }

/* ---------- spec: document ---------- */
.acequia-spec main { min-width: 0; }
.doc-header {
  margin-bottom: 40px; padding-bottom: 28px; border-bottom: 1px solid var(--line);
}
.doc-header h1 { font-size: clamp(1.9rem, 4vw, 2.6rem); margin-bottom: 10px; }
.doc-header .subtitle { font-size: 1.15rem; color: var(--muted); margin-bottom: 14px; }
.doc-meta { font-size: 0.88rem; color: var(--muted); }
.status-callout {
  margin-top: 20px; padding: 16px 20px;
  background: #e8f4f1; border-left: 4px solid var(--teal);
  border-radius: 0 var(--radius) var(--radius) 0; font-size: 0.95rem;
}
section.doc-section { margin-bottom: 48px; }
section.doc-section > h2 {
  font-size: 1.55rem; margin-bottom: 16px;
  padding-top: 8px;
}
section.doc-section > h3 { font-size: 1.15rem; margin: 28px 0 12px; }
section.doc-section p { color: var(--ink); margin-bottom: 14px; max-width: 52em; }
section.doc-section ul, section.doc-section ol {
  margin: 0 0 16px 1.4em; max-width: 50em; color: var(--ink);
}
section.doc-section li { margin-bottom: 6px; }

/* ---------- spec: tables ---------- */
table {
  width: 100%; border-collapse: collapse; margin: 16px 0 24px;
  font-size: 0.92rem; background: var(--cream);
  border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
}
th, td {
  padding: 11px 14px; text-align: left; border-bottom: 1px solid var(--line);
  vertical-align: top;
}
th { background: rgba(26, 107, 92, 0.08); font-weight: 700; color: var(--teal-deep); }
tr:last-child td { border-bottom: none; }
.table-wrap { overflow-x: auto; margin: 16px 0 24px; }

/* ---------- spec: code ---------- */
pre {
  background: #1e2a24; color: #e8f0ec;
  padding: 18px 20px; border-radius: var(--radius);
  overflow-x: auto; margin: 16px 0 20px;
  font-family: "JetBrains Mono", "SF Mono", Menlo, monospace;
  font-size: 0.82rem; line-height: 1.55;
}
code {
  font-family: "JetBrains Mono", "SF Mono", Menlo, monospace;
  font-size: 0.88em; background: rgba(30, 42, 36, 0.06);
  padding: 2px 6px; border-radius: 4px;
}
pre code { background: none; padding: 0; font-size: inherit; }

/* ---------- spec: diagrams & callouts ---------- */
.stack-diagram, .path-diagram {
  background: var(--cream); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 24px; margin: 20px 0 24px;
  box-shadow: var(--shadow);
}
.stack-diagram svg, .path-diagram svg { width: 100%; height: auto; display: block; }
.stack-diagram text.mono, .path-diagram text.mono {
  font-family: "JetBrains Mono", monospace; font-size: 11px;
}
.branch-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin: 20px 0;
}
@media (max-width: 720px) { .branch-grid { grid-template-columns: 1fr; } }
.branch-card {
  background: var(--cream); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 22px;
}
.branch-card.now { border-color: var(--teal); background: #f4faf8; }
.branch-card.later { border-style: dashed; }
.branch-card .tag {
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.08em;
  text-transform: uppercase; margin-bottom: 8px;
}
.branch-card.now .tag { color: var(--teal); }
.branch-card.later .tag { color: var(--muted); }
.shipped { color: var(--teal); font-weight: 600; }
.gap-note {
  padding: 18px 22px; background: #fdeee8;
  border: 1px solid rgba(196, 92, 58, 0.25);
  border-radius: var(--radius); margin: 20px 0;
}

/* ---------- spec: footer ---------- */
.acequia-spec footer {
  margin-top: 48px; padding-top: 28px; border-top: 1px solid var(--line);
  font-size: 0.88rem; color: var(--muted);
}

/* ---------- reveal on scroll (reduced-motion safe) ---------- */
.animate-in {
  opacity: 1;
  transform: none;
}
@media (prefers-reduced-motion: no-preference) {
  .animate-in {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.6s ease, transform 0.6s ease;
  }
  .animate-in.visible {
    opacity: 1;
    transform: none;
  }
}