/* ============================================================
   Prime Radiant — Shared design system
   Lifted from phase-minus-1/styles.css; extended for full site.
   No build step. All pages import this file.
   phase-minus-1/ keeps its own styles.css unchanged.
   ============================================================ */

/* ---------- Fonts ---------- */
@import url('https://fonts.googleapis.com/css2?family=Newsreader:ital,opsz,wght@0,6..72,300..700;1,6..72,300..700&family=Inter:wght@300;400;500;600&family=JetBrains+Mono:wght@400;500&display=swap');

/* ---------- Tokens ---------- */
:root {
  /* Type */
  --ff-serif: "Newsreader", "Source Serif Pro", Cambria, Georgia, "Times New Roman", serif;
  --ff-sans:  "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --ff-mono:  "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  /* Color — warm off-white paper, dark ink */
  --bg:       #f7f3ea;
  --bg-soft:  #f0ece1;
  --bg-card:  #fbf8f1;
  --ink:      #181613;
  --ink-soft: #4a443c;
  --ink-mute: #7a7268;
  --rule:     #c8bfae;
  --rule-soft:#dbd4c4;

  /* Accent */
  --accent:   #a04e2a;

  /* Wave palette — muted earth tones */
  --w00: #a07a36;  --w00-bg: #f1e6c8;   /* anchor — ochre */
  --w01: #356470;  --w01-bg: #d9e6e7;   /* ontology — teal-slate */
  --w02: #6a3c64;  --w02-bg: #e9d9e6;   /* causal — plum */
  --w03: #4a6741;  --w03-bg: #dde6d4;   /* cyclical — forest */
  --w04: #a04e2a;  --w04-bg: #f1d9c7;   /* physical — rust */
  --w05: #354969;  --w05-bg: #d6dce7;   /* world-systems — indigo */
  --w06: #885a30;  --w06-bg: #ecdcc4;   /* network — copper */
  --w07: #8b6f27;  --w07-bg: #ede2bf;   /* foresight — mustard */
  --w08: #6b4366;  --w08-bg: #e6d6e3;   /* agent-based — mauve */
  --w09: #4a4f58;  --w09-bg: #d8d7d2;   /* atlas — slate */

  /* Era colours */
  --mm:   #6a3c64;
  --dm:   #355d70;
  --lm:   #4a6741;
  --dawn: #4a6741;
  --day:  #c08a2a;
  --dusk: #8b3b2a;

  /* Status badges */
  --status-done:       #3f6a3a;
  --status-done-bg:    #d8ead5;
  --status-progress:   #b87a1a;
  --status-progress-bg:#f0dea8;
  --status-pending:    #4a4f58;
  --status-pending-bg: #d8d7d2;

  /* Layout */
  --maxw: 1280px;
  --maxw-narrow: 760px;
  --pad: clamp(1.25rem, 4vw, 2.75rem);
  --gap-section: clamp(3.5rem, 7vw, 6.5rem);
}

/* ---------- Reset / base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--ff-serif);
  font-size: 1.0625rem;
  line-height: 1.62;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-feature-settings: "kern", "liga", "calt", "onum";
}

img, svg { max-width: 100%; height: auto; display: block; }

a {
  color: var(--ink);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  text-decoration-color: var(--rule);
  transition: text-decoration-color 0.15s ease, color 0.15s ease;
}
a:hover, a:focus-visible { color: var(--accent); text-decoration-color: var(--accent); }

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

code {
  font-family: var(--ff-mono);
  font-size: 0.86em;
  background: var(--bg-soft);
  border: 1px solid var(--rule-soft);
  padding: 0.1em 0.4em;
  border-radius: 3px;
  color: var(--ink-soft);
  word-break: break-word;
}

em { font-style: italic; color: var(--ink-soft); }
strong { font-weight: 600; }

.skip-link {
  position: absolute;
  left: 0.5rem; top: -3rem;
  background: var(--ink); color: var(--bg);
  padding: 0.5rem 0.75rem;
  font-family: var(--ff-sans);
  font-size: 0.875rem;
  z-index: 100;
  border-radius: 3px;
}
.skip-link:focus { top: 0.5rem; }

/* ---------- Layout primitives ---------- */
.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding-left: var(--pad);
  padding-right: var(--pad);
}
.container--narrow { max-width: var(--maxw-narrow); }

/* ---------- Masthead ---------- */
.masthead {
  position: sticky; top: 0; z-index: 50;
  background: rgba(247, 243, 234, 0.92);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--rule-soft);
}
.masthead__inner {
  display: flex; align-items: center; gap: 0.75rem;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0.75rem var(--pad);
}
.masthead__mark { color: var(--accent); display: flex; align-items: center; flex-shrink: 0; }
.masthead__text {
  font-family: var(--ff-sans);
  font-size: 0.875rem;
  letter-spacing: 0.01em;
  display: flex; gap: 0.5rem; align-items: baseline;
  min-width: 0;
}
.masthead__project { font-weight: 600; color: var(--ink); }
.masthead__sep { color: var(--rule); }
.masthead__phase { color: var(--ink-soft); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.masthead__nav {
  margin-left: auto;
  display: flex; gap: 1.25rem;
  font-family: var(--ff-sans);
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.masthead__nav a {
  color: var(--ink-soft);
  text-decoration: none;
  padding: 0.25rem 0;
  border-bottom: 1px solid transparent;
}
.masthead__nav a:hover, .masthead__nav a:focus-visible {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

@media (max-width: 780px) {
  .masthead__nav { display: none; }
}

/* ---------- Typographic atoms ---------- */
.kicker {
  font-family: var(--ff-sans);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin: 0 0 1rem 0;
}
.kicker--accent { color: var(--accent); }

h1, h2, h3, h4 {
  font-family: var(--ff-serif);
  font-weight: 500;
  letter-spacing: -0.012em;
  margin: 0;
  text-wrap: balance;
  color: var(--ink);
}

.display {
  font-size: clamp(2.05rem, 4.6vw, 3.55rem);
  line-height: 1.08;
  font-weight: 400;
  letter-spacing: -0.018em;
  margin-bottom: 1.75rem;
}
.h-display {
  font-size: clamp(1.55rem, 3.2vw, 2.45rem);
  line-height: 1.14;
  font-weight: 500;
  letter-spacing: -0.014em;
  margin-bottom: 1.25rem;
}
.h-sub {
  font-size: clamp(1.2rem, 2vw, 1.4rem);
  line-height: 1.2;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.lede {
  font-size: clamp(1.075rem, 1.4vw, 1.2rem);
  line-height: 1.55;
  color: var(--ink-soft);
  max-width: 38em;
  margin: 0 0 1.1rem 0;
  font-weight: 400;
}
.lede--small {
  font-size: 1.0625rem;
  line-height: 1.6;
  max-width: 42em;
}

.section-head { margin-bottom: clamp(2rem, 4vw, 3rem); }

/* ---------- Hero ---------- */
.hero {
  padding-top: clamp(3rem, 7vw, 6rem);
  padding-bottom: clamp(3rem, 7vw, 5.5rem);
  border-bottom: 1px solid var(--rule-soft);
}
.hero .display { max-width: 22ch; }
.hero__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1.25rem 2rem;
  margin: 2.75rem 0 0 0;
  padding: 1.25rem 0 0 0;
  border-top: 1px solid var(--rule-soft);
}
.hero__stats > div { margin: 0; }
.hero__stats dt {
  font-family: var(--ff-sans);
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: 0.35rem;
  font-weight: 500;
}
.hero__stats dd {
  font-family: var(--ff-serif);
  font-size: 1.5rem;
  font-weight: 500;
  margin: 0;
  color: var(--ink);
  letter-spacing: -0.01em;
}

/* ---------- Phase index tiles ---------- */
.phase-index {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.25rem;
}

.phase-tile {
  background: var(--bg-card);
  border: 1px solid var(--rule-soft);
  border-top: 3px solid var(--rule);
  border-radius: 2px;
  padding: 1.5rem 1.5rem 1.35rem 1.5rem;
  display: flex; flex-direction: column;
  text-decoration: none;
  color: inherit;
  transition: border-top-color 0.15s ease;
}
.phase-tile:hover, .phase-tile:focus-visible {
  border-top-color: var(--accent);
  text-decoration: none;
}

.phase-tile__num {
  font-family: var(--ff-sans);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: 0.4rem;
}
.phase-tile__name {
  font-family: var(--ff-serif);
  font-size: 1.25rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  margin: 0 0 0.5rem 0;
}
.phase-tile__desc {
  font-size: 0.97rem;
  line-height: 1.55;
  color: var(--ink-soft);
  margin: 0 0 1rem 0;
  flex: 1;
}
.phase-tile__status {
  margin-top: auto;
}

/* ---------- Status badge ---------- */
.badge {
  display: inline-block;
  font-family: var(--ff-sans);
  font-size: 0.67rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.18rem 0.55rem;
  border-radius: 2px;
}
.badge--done     { background: var(--status-done-bg);     color: var(--status-done); }
.badge--progress { background: var(--status-progress-bg); color: var(--status-progress); }
.badge--pending  { background: var(--status-pending-bg);  color: var(--status-pending); }

/* ---------- Era badges ---------- */
.era-badge {
  display: inline-block;
  font-family: var(--ff-sans);
  font-size: 0.67rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #fff;
  padding: 0.15rem 0.45rem;
  border-radius: 2px;
}
.era-badge--mm { background: var(--mm); }
.era-badge--dm { background: var(--dm); }
.era-badge--lm { background: var(--lm); }

/* Phase dots */
.dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; }
.dot--dawn { background: var(--dawn); }
.dot--day  { background: var(--day); }
.dot--dusk { background: var(--dusk); }

/* ---------- Era frame cards ---------- */
.eras {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}
.era {
  background: var(--bg-card);
  border: 1px solid var(--rule-soft);
  border-top: 3px solid var(--mm);
  padding: 1.75rem 1.6rem 1.6rem 1.6rem;
  border-radius: 2px;
  display: flex; flex-direction: column;
}
.era--mm { border-top-color: var(--mm); }
.era--dm { border-top-color: var(--dm); }
.era--lm { border-top-color: var(--lm); }

.era__head { margin-bottom: 1rem; }
.era__mark {
  display: inline-block;
  font-family: var(--ff-sans);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: #fff;
  padding: 0.2rem 0.5rem;
  border-radius: 2px;
  margin-bottom: 0.6rem;
}
.era--mm .era__mark { background: var(--mm); }
.era--dm .era__mark { background: var(--dm); }
.era--lm .era__mark { background: var(--lm); }

.era__name {
  font-family: var(--ff-serif);
  font-size: 1.5rem;
  font-weight: 500;
  margin: 0 0 0.25rem 0;
  letter-spacing: -0.01em;
}
.era__years {
  font-family: var(--ff-sans);
  font-size: 0.84rem;
  color: var(--ink-mute);
  margin: 0 0 0.4rem 0;
  letter-spacing: 0.01em;
}
.era__phase {
  font-family: var(--ff-sans);
  font-size: 0.84rem;
  color: var(--ink-soft);
  margin: 0;
  display: flex; align-items: center; gap: 0.4rem;
  font-weight: 500;
}
.era__body {
  font-size: 1.0125rem;
  line-height: 1.55;
  color: var(--ink-soft);
  margin: 0 0 1.25rem 0;
  flex: 1;
}
.era__instances {
  margin: 0;
  padding-top: 1rem;
  border-top: 1px solid var(--rule-soft);
  display: flex; flex-wrap: wrap; gap: 0.4rem;
}
.era__instances span {
  font-family: var(--ff-sans);
  font-size: 0.78rem;
  color: var(--ink-soft);
  background: var(--bg-soft);
  padding: 0.18rem 0.5rem;
  border-radius: 2px;
  letter-spacing: 0.01em;
}

/* ---------- Section layout ---------- */
.section {
  padding-top: var(--gap-section);
  padding-bottom: var(--gap-section);
}
.section--ruled {
  border-top: 1px solid var(--rule-soft);
}
.section--soft {
  background: var(--bg-soft);
  border-top: 1px solid var(--rule-soft);
  border-bottom: 1px solid var(--rule-soft);
}

/* ---------- Architecture diagram ---------- */
.arch-diagram {
  background: var(--bg-card);
  border: 1px solid var(--rule-soft);
  border-radius: 3px;
  padding: clamp(1rem, 3vw, 2.25rem);
  overflow-x: auto;
}
.arch-svg {
  width: 100%;
  height: auto;
  min-width: 560px;
}

/* ---------- Primitives table ---------- */
.primitives-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--ff-sans);
  font-size: 0.88rem;
  background: var(--bg-card);
  border: 1px solid var(--rule-soft);
  border-radius: 2px;
  overflow: hidden;
}
.primitives-table thead th {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 600;
  color: var(--ink-mute);
  text-align: left;
  padding: 0.55rem 1rem;
  border-bottom: 1px solid var(--rule);
  background: var(--bg-soft);
}
.primitives-table tbody td {
  padding: 0.65rem 1rem;
  border-bottom: 1px solid var(--rule-soft);
  vertical-align: top;
  line-height: 1.45;
  color: var(--ink-soft);
}
.primitives-table tbody tr:last-child td { border-bottom: 0; }
.primitives-table code {
  font-size: 0.82em;
  white-space: nowrap;
}

/* ---------- Machine card (teaser + full) ---------- */
.machine-card {
  background: var(--bg-card);
  border: 1px solid var(--rule-soft);
  border-radius: 2px;
  overflow: hidden;
}
.machine-card__hero {
  padding: 1.5rem 1.75rem;
  border-bottom: 1px solid var(--rule-soft);
}
.machine-card__badges {
  display: flex; gap: 0.5rem; flex-wrap: wrap;
  margin-bottom: 0.75rem;
}
.machine-card__name {
  font-family: var(--ff-serif);
  font-size: clamp(1.3rem, 2.5vw, 1.7rem);
  font-weight: 500;
  letter-spacing: -0.012em;
  margin: 0 0 0.35rem 0;
  line-height: 1.15;
}
.machine-card__sub {
  font-family: var(--ff-sans);
  font-size: 0.88rem;
  color: var(--ink-mute);
  letter-spacing: 0.01em;
  margin: 0;
}
.machine-card__body {
  padding: 1.5rem 1.75rem;
}
.machine-card__desc {
  font-size: 1.0125rem;
  line-height: 1.62;
  color: var(--ink-soft);
  margin: 0 0 1.5rem 0;
  max-width: 68ch;
}
.machine-card__panels {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--rule-soft);
}
.machine-card__panel {}
.machine-card__panel-label {
  font-family: var(--ff-sans);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin: 0 0 0.6rem 0;
}
.machine-card__panel-list {
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--ink-soft);
}
.machine-card__panel-list li {
  padding: 0.25rem 0;
  border-bottom: 1px dotted var(--rule-soft);
}
.machine-card__panel-list li:last-child { border-bottom: 0; }

/* Teaser variant */
.machine-card--teaser .machine-card__desc {
  -webkit-line-clamp: 4;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Full card page — sections */
.card-section {
  padding: 1.25rem 1.75rem;
  border-top: 1px solid var(--rule-soft);
}
.card-section__title {
  font-family: var(--ff-sans);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin: 0 0 1rem 0;
}

/* Stub reference token */
.stub-ref {
  font-family: var(--ff-mono);
  font-size: 0.82em;
  background: var(--bg-soft);
  border: 1px dashed var(--rule);
  color: var(--ink-mute);
  padding: 0.1em 0.4em;
  border-radius: 3px;
}
.stub-ref::after {
  content: " (stub)";
  font-size: 0.85em;
  color: var(--ink-mute);
  font-style: italic;
}

/* Card state variable pills */
.sv-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 0.75rem;
}
.sv-item {
  background: var(--bg-soft);
  border: 1px solid var(--rule-soft);
  border-radius: 2px;
  padding: 0.6rem 0.75rem;
}
.sv-item__name {
  font-family: var(--ff-mono);
  font-size: 0.78rem;
  color: var(--ink-soft);
  margin-bottom: 0.3rem;
}
.sv-item__value {
  font-family: var(--ff-sans);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--ink);
}
.sv-item__flag {
  font-family: var(--ff-sans);
  font-size: 0.65rem;
  color: var(--ink-mute);
  letter-spacing: 0.06em;
}

/* Coupling list */
.coupling-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.coupling-item {
  background: var(--bg-soft);
  border: 1px solid var(--rule-soft);
  border-radius: 2px;
  padding: 0.65rem 0.85rem;
  font-size: 0.92rem;
  line-height: 1.45;
}
.coupling-item__kind {
  font-family: var(--ff-mono);
  font-size: 0.78em;
  color: var(--ink-mute);
  margin-right: 0.5rem;
}
.coupling-item__target {
  color: var(--ink-soft);
}

/* Source citation */
.sources-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.source-item {
  font-size: 0.88rem;
  color: var(--ink-mute);
  line-height: 1.45;
  font-style: italic;
}
.source-item strong {
  font-style: normal;
  color: var(--ink-soft);
}

/* ---------- Card index (browse list) ---------- */
.card-index {}
.card-group {
  margin-bottom: 3rem;
}
.card-group__header {
  display: flex; align-items: baseline; gap: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--rule);
  margin-bottom: 1.25rem;
}
.card-group__era {
  font-family: var(--ff-serif);
  font-size: 1.5rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  margin: 0;
}
.card-group__count {
  font-family: var(--ff-sans);
  font-size: 0.84rem;
  color: var(--ink-mute);
}

.card-row {
  display: flex; align-items: baseline; gap: 0.75rem;
  padding: 0.55rem 0;
  border-bottom: 1px solid var(--rule-soft);
  font-size: 0.97rem;
  line-height: 1.45;
  text-decoration: none;
  color: inherit;
}
.card-row:last-child { border-bottom: 0; }
.card-row:hover { background: var(--bg-soft); margin: 0 -0.5rem; padding-left: 0.5rem; padding-right: 0.5rem; }
.card-row__name {
  font-family: var(--ff-serif);
  font-weight: 500;
  flex: 1;
  min-width: 0;
  color: var(--ink);
}
.card-row__sub {
  font-size: 0.88rem;
  color: var(--ink-mute);
  white-space: nowrap;
}

/* Phase chip filter */
.filter-bar {
  display: flex; flex-wrap: wrap; gap: 0.5rem;
  margin-bottom: 1.5rem;
}
.chip {
  font-family: var(--ff-sans);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
  background: var(--bg-card);
  border: 1px solid var(--rule);
  border-radius: 2px;
  padding: 0.25rem 0.65rem;
  cursor: pointer;
  transition: background 0.1s, color 0.1s, border-color 0.1s;
  user-select: none;
}
.chip:hover { border-color: var(--ink-soft); }
.chip.active { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.chip--mm.active { background: var(--mm); border-color: var(--mm); }
.chip--dm.active { background: var(--dm); border-color: var(--dm); }
.chip--lm.active { background: var(--lm); border-color: var(--lm); }

/* ---------- Schema field table ---------- */
.schema-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--ff-sans);
  font-size: 0.86rem;
  color: var(--ink-soft);
  background: var(--bg-card);
  border: 1px solid var(--rule-soft);
  border-radius: 2px;
  overflow: hidden;
}
.schema-table thead th {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 600;
  color: var(--ink-mute);
  text-align: left;
  padding: 0.5rem 0.9rem;
  border-bottom: 1px solid var(--rule);
  background: var(--bg-soft);
}
.schema-table tbody td {
  padding: 0.55rem 0.9rem;
  border-bottom: 1px solid var(--rule-soft);
  vertical-align: top;
  line-height: 1.45;
}
.schema-table tbody tr:nth-child(odd) td { background: rgba(255, 255, 255, 0.18); }
.schema-table tbody tr:last-child td { border-bottom: 0; }
.schema-table code { background: transparent; border: 0; padding: 0; font-size: 0.9em; color: var(--ink); }
.schema-table .field-name { font-weight: 600; color: var(--ink); }
.schema-table .wave-src {
  font-size: 0.75em;
  font-family: var(--ff-mono);
  color: var(--ink-mute);
  background: var(--bg-soft);
  border: 1px solid var(--rule-soft);
  padding: 0.05em 0.3em;
  border-radius: 2px;
}

/* ---------- Snapshot timeline ---------- */
.snapshots {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.snapshot {
  background: var(--bg-soft);
  border: 1px solid var(--rule-soft);
  border-left: 3px solid var(--rule);
  border-radius: 2px;
  padding: 0.85rem 1.1rem;
}
.snapshot--dawn { border-left-color: var(--dawn); }
.snapshot--day  { border-left-color: var(--day); }
.snapshot--dusk { border-left-color: var(--dusk); }

.snapshot__head {
  display: flex; align-items: baseline; gap: 0.75rem;
  margin-bottom: 0.5rem;
}
.snapshot__label {
  font-family: var(--ff-sans);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.snapshot__years {
  font-family: var(--ff-mono);
  font-size: 0.82rem;
  color: var(--ink-mute);
}

/* ---------- Placeholder (Phase 2–5) ---------- */
.placeholder-section {
  padding: clamp(3rem, 8vw, 6rem) 0;
}
.placeholder-box {
  background: var(--bg-card);
  border: 1px solid var(--rule-soft);
  border-top: 3px solid var(--rule);
  border-radius: 2px;
  padding: 2rem 2.25rem;
  max-width: 640px;
}
.placeholder-box__status {
  font-family: var(--ff-sans);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: 0.75rem;
}
.placeholder-box__title {
  font-family: var(--ff-serif);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 500;
  letter-spacing: -0.012em;
  margin: 0 0 0.75rem 0;
}
.placeholder-box__desc {
  font-size: 1.0125rem;
  line-height: 1.62;
  color: var(--ink-soft);
  margin: 0 0 1.5rem 0;
}
.placeholder-box__back {
  font-family: var(--ff-sans);
  font-size: 0.875rem;
}

/* ---------- Breadcrumb ---------- */
.breadcrumb {
  font-family: var(--ff-sans);
  font-size: 0.82rem;
  color: var(--ink-mute);
  display: flex; align-items: center; gap: 0.4rem;
  flex-wrap: wrap;
  padding: 1rem 0;
}
.breadcrumb a { color: var(--ink-mute); text-decoration: none; }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb__sep { color: var(--rule); }

/* ---------- Progress bar ---------- */
.progress-bar {
  background: var(--bg-soft);
  border: 1px solid var(--rule-soft);
  border-radius: 2px;
  height: 6px;
  overflow: hidden;
  margin-bottom: 0.5rem;
}
.progress-bar__fill {
  height: 100%;
  background: var(--status-progress);
  border-radius: 2px;
}

/* ---------- Footer ---------- */
.page-footer {
  padding: 2.5rem 0 3rem 0;
  border-top: 1px solid var(--rule-soft);
}
.page-footer__line {
  font-family: var(--ff-sans);
  font-size: 0.78rem;
  color: var(--ink-mute);
  letter-spacing: 0.02em;
  line-height: 1.6;
  text-align: center;
  margin: 0;
  display: flex; flex-wrap: wrap; justify-content: center; gap: 0.5rem;
}
.page-footer__dot { color: var(--rule); }

/* ---------- Tag ---------- */
.tag {
  font-family: var(--ff-sans);
  font-size: 0.66rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-mute);
  background: var(--bg-soft);
  border: 1px solid var(--rule-soft);
  padding: 0.12rem 0.45rem;
  border-radius: 2px;
}
.tag--canon { color: var(--status-done); background: var(--status-done-bg); }
.tag--extrap { color: var(--status-progress); background: var(--status-progress-bg); }

/* ---------- Responsive tweaks ---------- */
@media (max-width: 540px) {
  body { font-size: 1rem; }
  .lede { font-size: 1.05rem; }
  .hero { padding-top: 2.25rem; padding-bottom: 2.5rem; }
  .hero__stats { gap: 1rem 1.5rem; }
  .phase-index { grid-template-columns: 1fr; }
  .eras { grid-template-columns: 1fr; }
  .machine-card__panels { grid-template-columns: 1fr; }
  .schema-table { font-size: 0.82rem; }
  .schema-table thead th, .schema-table tbody td { padding: 0.45rem 0.6rem; }
}

@media (min-width: 1500px) {
  .display { font-size: 3.55rem; }
  .h-display { font-size: 2.45rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition: none !important;
    animation: none !important;
  }
}

@media print {
  .masthead, .skip-link { display: none; }
  body { background: #fff; color: #000; }
}