/* legislativedata.org — the house stylesheet.
 *
 * Structure taken from essays.stevenmacgregor.uk, 15 September 2026: a twelve
 * step warm neutral ramp with a layer of names on top saying what each step is
 * FOR. Nothing below the :root blocks may name a colour. Light mode redefines
 * the twelve and nothing else, which is what makes the mode setting nearly
 * free. See docs/PHASE-1-STYLE.md.
 */

/* ---- The ramp: dark, the default ---------------------------------------- */

:root {
  --n1:  #1a1816;
  --n2:  #201e1b;
  --n3:  #262320;
  --n4:  #2e2a26;
  --n5:  #37322d;
  --n6:  #443e38;
  --n7:  #6b635a;
  --n8:  #8a8279;
  --n9:  #a8a099;
  --n10: #c4bdb5;
  --n11: #dfd9d1;
  --n12: #f4f0ea;

  --accent:       #7ea8e8;
  --accent-hover: #96b9ee;
}

/* ---- The ramp: light, the same ramp inverted and still warm -------------- */

:root[data-mode="light"] {
  --n1:  #fdfcfb;
  --n2:  #f8f7f5;
  --n3:  #f2f0ec;
  --n4:  #e9e6e1;
  --n5:  #ddd9d3;
  --n6:  #c9c4bc;
  --n7:  #a9a29a;
  --n8:  #857e75;
  --n9:  #6e6760;
  --n10: #57514b;
  --n11: #3d3833;
  --n12: #241f1b;

  --accent:       #2f6cc4;
  --accent-hover: #24559b;
}

/* ---- What each step is for ---------------------------------------------- */

:root {
  --bg:          var(--n1);
  --surface:     var(--n2);
  --raised:      var(--n3);
  --border:      var(--n5);
  --border-firm: var(--n6);
  --text-faint:  var(--n7);
  --text-muted:  var(--n8);
  --text:        var(--n11);
  --text-strong: var(--n12);

  --sans:  "IBM Plex Sans", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --serif: "IBM Plex Serif", ui-serif, Georgia, "Times New Roman", serif;

  /* The short fixed set. Nothing invents a size outside it. */
  --t-xs: 11px;
  --t-sm: 12px;
  --t-md: 13px;
  --t-lg: 14px;
  --t-prose: 18px;
  --t-head: 26px;

  --s1: 0.25rem;
  --s2: 0.5rem;
  --s3: 0.75rem;
  --s4: 1rem;
  --s6: 1.5rem;
  --s8: 2rem;
  --s12: 3rem;

  --radius: 3px;
  --radius-menu: 7px;

  --reading: 700px;
}

/* ---- Fonts, served from this machine and nowhere else -------------------- */

@font-face {
  font-family: "IBM Plex Sans";
  src: url("/static/fonts/ibm-plex-sans-latin-400-normal.woff2") format("woff2");
  font-weight: 400; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "IBM Plex Sans";
  src: url("/static/fonts/ibm-plex-sans-latin-600-normal.woff2") format("woff2");
  font-weight: 600; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "IBM Plex Serif";
  src: url("/static/fonts/ibm-plex-serif-latin-400-normal.woff2") format("woff2");
  font-weight: 400; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "IBM Plex Serif";
  src: url("/static/fonts/ibm-plex-serif-latin-600-normal.woff2") format("woff2");
  font-weight: 600; font-style: normal; font-display: swap;
}

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

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

html { color-scheme: dark; }
:root[data-mode="light"] { color-scheme: light; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: var(--t-lg);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

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

/* ---- The bar across the top. No left rail. ------------------------------- */

.topbar {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.topbar-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: var(--s3) var(--s4);
  display: flex;
  align-items: baseline;
  gap: var(--s4);
}

.wordmark {
  font-family: var(--sans);
  font-size: var(--t-lg);
  font-weight: 600;
  color: var(--text-strong);
  text-decoration: none;
}
.wordmark:hover { color: var(--text-strong); }

.wordmark-tail { color: var(--text-muted); font-weight: 400; }

.topbar nav {
  margin-left: auto;
  display: flex;
  gap: var(--s4);
  font-size: var(--t-md);
}

/* ---- The page ----------------------------------------------------------- */

main { flex: 1 0 auto; }

.reading {
  max-width: var(--reading);
  margin: 0 auto;
  padding: var(--s12) var(--s4) var(--s8);
}

h1 {
  font-family: var(--sans);
  font-size: var(--t-head);
  font-weight: 600;
  line-height: 1.25;
  color: var(--text-strong);
  margin: 0 0 var(--s3);
  letter-spacing: -0.01em;
}

h2 {
  font-family: var(--sans);
  font-size: var(--t-lg);
  font-weight: 600;
  color: var(--text-strong);
  margin: var(--s8) 0 var(--s3);
}

/* The substance is set in serif. The machinery around it is not. */
.prose {
  font-family: var(--serif);
  font-size: var(--t-prose);
  line-height: 1.65;
  color: var(--text);
}
.prose p { margin: 0 0 var(--s4); }
.prose p:last-child { margin-bottom: 0; }

.standfirst {
  font-family: var(--serif);
  font-size: var(--t-prose);
  line-height: 1.6;
  color: var(--text);
  margin: 0 0 var(--s8);
}

/* A label above a thing. Hierarchy from colour and weight, not from size. */
.label {
  font-family: var(--sans);
  font-size: var(--t-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin: 0 0 var(--s2);
}

/* Hairline rules between sections, not a box around everything. */
.rule {
  border: 0;
  border-top: 1px solid var(--border);
  margin: var(--s8) 0;
}

/* The device worth more to us than the colours: what is not here yet. */
.not-here {
  border-left: 2px solid var(--accent);
  padding: 0 0 0 var(--s4);
  margin: var(--s8) 0 0;
}
.not-here ul {
  margin: 0;
  padding-left: var(--s4);
  font-size: var(--t-lg);
  color: var(--text-muted);
}
.not-here li { margin-bottom: var(--s1); }

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

.foot {
  flex-shrink: 0;
  border-top: 1px solid var(--border);
  background: var(--surface);
  margin-top: var(--s12);
}

.foot-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: var(--s4);
  display: flex;
  flex-wrap: wrap;
  gap: var(--s2) var(--s4);
  font-size: var(--t-md);
  color: var(--text-muted);
}

.foot-inner .spacer { margin-left: auto; }

.mode-toggle {
  background: none;
  border: 0;
  padding: 0;
  font-family: var(--sans);
  font-size: var(--t-md);
  color: var(--accent);
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 2px;
}
.mode-toggle:hover { color: var(--accent-hover); }

/* ---- Print: dark on white, whatever the screen is doing ------------------ */

@media print {
  :root {
    --bg: #ffffff;
    --surface: #ffffff;
    --raised: #ffffff;
    --border: #cccccc;
    --text: #1a1a1a;
    --text-strong: #000000;
    --text-muted: #555555;
    --accent: #1a1a1a;
  }
  body { font-size: 11pt; }
  .topbar, .mode-toggle { display: none; }
  .foot { border-top: 1px solid var(--border); }
  a { text-decoration: underline; }
}

/* ---- Narrow screens ----------------------------------------------------- */

@media (max-width: 640px) {
  .reading { padding-top: var(--s8); }
  h1 { font-size: 22px; }
  .prose, .standfirst { font-size: 17px; }
  .topbar-inner { flex-wrap: wrap; gap: var(--s2) var(--s3); }
  .topbar nav { margin-left: 0; width: 100%; }
}