/* ============================================================================
   Sophia — the Wisdom Gate · thesis site
   A scholarly monograph with a provenance/verification visual language.
   Light + dark, dependency-free, accessible. Decided by the UI council
   (docs/10-Web/UI-Council-Decisions.md).
   ========================================================================== */

:root {
  /* Paper & ink */
  --paper:       #f7f3ec;
  --paper-2:     #fffdf8;
  --surface:     #fffefb;
  --surface-2:   #f1ebe0;
  --ink:         #1b1b2b;
  --ink-soft:    #3a3a4e;
  --muted:       #6a6477;
  --border:      #ddd4c2;
  --border-soft: #ece5d6;

  /* Brand */
  --bronze:      #9a7b4f;
  --bronze-deep: #7c6038;
  --bronze-soft: #ece0cb;

  /* Verdict palette — the gate's vocabulary */
  --accept:      #2f7d6b;   /* accepted / pass  */
  --accept-bg:   #e3f0ec;
  --abstain:     #b6822a;   /* abstain / held   */
  --abstain-bg:  #f6ecd6;
  --block:       #b14b43;   /* block / fail     */
  --block-bg:    #f6e2df;

  /* Type */
  --serif: "Source Serif 4", "Noto Serif SC", Georgia, serif;
  --sans:  "IBM Plex Sans", "Noto Sans SC", system-ui, sans-serif;
  --mono:  "IBM Plex Mono", ui-monospace, SFMono-Regular, monospace;

  /* Geometry */
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 1px 2px rgba(27,27,43,.04), 0 8px 24px -12px rgba(27,27,43,.18);
  --shadow-lg: 0 2px 6px rgba(27,27,43,.06), 0 24px 60px -24px rgba(27,27,43,.28);
  --maxw: 880px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper:       #14141c;
    --paper-2:     #181820;
    --surface:     #1d1d27;
    --surface-2:   #23232f;
    --ink:         #ece9f3;
    --ink-soft:    #c9c5d6;
    --muted:       #9a95ab;
    --border:      #34343f;
    --border-soft: #2a2a34;

    --bronze:      #cda86f;
    --bronze-deep: #e0c08a;
    --bronze-soft: #2c2519;

    --accept:      #62c6ad;  --accept-bg:  #16241f;
    --abstain:     #d8ac57;  --abstain-bg: #271f10;
    --block:       #e08079;  --block-bg:   #271715;

    --shadow:    0 1px 2px rgba(0,0,0,.4), 0 10px 30px -14px rgba(0,0,0,.7);
    --shadow-lg: 0 2px 6px rgba(0,0,0,.5), 0 30px 70px -28px rgba(0,0,0,.8);
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.7;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}

a { color: var(--bronze-deep); text-decoration-thickness: .06em; text-underline-offset: .18em; }
a:hover { color: var(--bronze); }

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--ink); color: var(--paper);
  padding: .6rem 1rem; border-radius: 0 0 var(--radius-sm) 0;
}
.skip-link:focus { left: 0; }

a:focus-visible, button:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--bronze);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ===========================================================  HERO  ====== */

.hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
  background:
    radial-gradient(1100px 460px at 78% -8%, var(--bronze-soft), transparent 60%),
    radial-gradient(800px 380px at 4% 8%, var(--surface-2), transparent 55%),
    var(--paper-2);
}
.hero-glyph {
  position: absolute;
  right: -2vw; top: 50%; transform: translateY(-50%);
  font-family: var(--serif);
  font-size: clamp(18rem, 34vw, 40rem);
  line-height: 1;
  color: var(--ink);
  opacity: .035;
  pointer-events: none;
  user-select: none;
}
.hero-inner {
  position: relative;
  max-width: 1180px;
  margin: 0 auto;
  padding: clamp(2.5rem, 6vw, 5rem) clamp(1.25rem, 5vw, 4rem) clamp(2rem, 4vw, 3.25rem);
}
.eyebrow {
  font-family: var(--mono);
  font-size: .76rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--bronze-deep);
  margin: 0 0 1rem;
  display: flex; align-items: center; gap: .6rem; flex-wrap: wrap;
}
.eyebrow .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accept); box-shadow: 0 0 0 4px var(--accept-bg); }
.hero h1 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(2.5rem, 6vw, 4.25rem);
  line-height: 1.04;
  letter-spacing: -.018em;
  margin: 0 0 1rem;
  max-width: 16ch;
}
.hero .lede {
  font-size: clamp(1.08rem, 2.2vw, 1.3rem);
  color: var(--ink-soft);
  max-width: 60ch;
  margin: 0 0 1.75rem;
}
.hero .lede strong { color: var(--ink); }

.cta-row { display: flex; flex-wrap: wrap; gap: .75rem; margin-bottom: 1.75rem; }
.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  font-family: var(--sans); font-size: .92rem; font-weight: 600;
  padding: .7rem 1.15rem; border-radius: var(--radius-sm);
  border: 1px solid var(--border); cursor: pointer; text-decoration: none;
  transition: transform .12s ease, background .15s ease, border-color .15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--ink); color: var(--paper-2); border-color: var(--ink); }
.btn-primary:hover { background: var(--bronze-deep); border-color: var(--bronze-deep); color: #fff; }
.btn-ghost { background: var(--surface); color: var(--ink); }
.btn-ghost:hover { border-color: var(--bronze); color: var(--ink); }

/* validated stat chips in hero */
.hero-stats {
  display: flex; flex-wrap: wrap; gap: .6rem 1.5rem;
  padding-top: 1.4rem; border-top: 1px solid var(--border-soft);
  font-family: var(--sans);
}
.hero-stat { display: flex; flex-direction: column; }
.hero-stat b {
  font-size: 1.5rem; font-weight: 600; color: var(--bronze-deep);
  font-variant-numeric: tabular-nums; line-height: 1.1;
}
.hero-stat span { font-size: .78rem; color: var(--muted); }

.scope-note {
  margin-top: 1.5rem;
  font-family: var(--sans); font-size: .82rem; line-height: 1.55;
  color: var(--muted);
  border-left: 3px solid var(--abstain);
  padding: .15rem 0 .15rem .9rem;
  max-width: 70ch;
}

/* the gate diagram */
.gate-flow {
  display: flex; align-items: center; flex-wrap: wrap; gap: .55rem;
  margin-top: 1.75rem; font-family: var(--mono); font-size: .8rem;
}
.gate-node {
  padding: .45rem .8rem; border-radius: var(--radius-sm);
  border: 1px solid var(--border); background: var(--surface);
  white-space: nowrap;
}
.gate-node.verify { border-color: var(--bronze); color: var(--bronze-deep); font-weight: 500; }
.gate-arrow { color: var(--muted); }
.gate-node.v-accept  { border-color: var(--accept);  background: var(--accept-bg);  color: var(--accept); }
.gate-node.v-abstain { border-color: var(--abstain); background: var(--abstain-bg); color: var(--abstain); }
.gate-node.v-block   { border-color: var(--block);   background: var(--block-bg);   color: var(--block); }

/* ===========================================================  LAYOUT  ==== */

.layout {
  display: grid;
  grid-template-columns: 290px 1fr;
  max-width: 1180px;
  margin: 0 auto;
}

nav.toc {
  position: sticky; top: 0; align-self: start;
  height: 100vh; overflow-y: auto;
  padding: 2.25rem 1.25rem 2rem;
  border-right: 1px solid var(--border);
  font-family: var(--sans); font-size: .85rem;
}
nav.toc .brand {
  font-weight: 600; letter-spacing: .06em; text-transform: uppercase;
  font-size: .72rem; color: var(--bronze-deep); margin-bottom: .35rem;
}
nav.toc .brand-sub { color: var(--muted); font-size: .78rem; margin: 0 0 1.5rem; font-family: var(--serif); font-style: italic; }
nav.toc .nav-label {
  font-size: .68rem; letter-spacing: .12em; text-transform: uppercase;
  color: var(--muted); margin: 1.4rem 0 .5rem;
}
nav.toc a {
  display: block; color: var(--muted); text-decoration: none;
  padding: .34rem .75rem; border-left: 2px solid transparent;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  transition: color .12s, border-color .12s, background .12s;
}
nav.toc a:hover { color: var(--ink); background: var(--surface-2); }
nav.toc a.active { color: var(--ink); border-left-color: var(--bronze); font-weight: 600; }
nav.toc .links { margin-top: 1.5rem; display: flex; flex-wrap: wrap; gap: .5rem; }
nav.toc .links a {
  border: 1px solid var(--border); border-radius: 999px;
  padding: .25rem .7rem; font-size: .76rem;
}

main { max-width: var(--maxw); padding: clamp(2rem, 4vw, 3.5rem) clamp(1.25rem, 4vw, 3.25rem) 5rem; }

.chapter { margin-bottom: 4.5rem; scroll-margin-top: 1.5rem; }
.chapter-label {
  font-family: var(--mono); font-size: .72rem; letter-spacing: .12em;
  text-transform: uppercase; color: var(--bronze-deep); margin-bottom: .55rem;
}
h2 { font-size: clamp(1.6rem, 3vw, 2.1rem); font-weight: 600; line-height: 1.18; letter-spacing: -.012em; margin: 0 0 1rem; }
h3 { font-size: 1.18rem; font-family: var(--sans); font-weight: 600; margin: 2rem 0 .75rem; }
p  { margin: 0 0 1.1rem; }
strong { font-weight: 600; }
em { color: var(--ink-soft); }
code {
  font-family: var(--mono); font-size: .85em;
  background: var(--surface-2); padding: .12em .4em; border-radius: 4px;
  border: 1px solid var(--border-soft);
}

.abstract {
  font-size: 1.08rem; color: var(--ink-soft);
  border-left: 3px solid var(--bronze); padding-left: 1.3rem;
}

ol, ul { padding-left: 1.3rem; }
li { margin-bottom: .5rem; }

/* ===========================================================  CARDS  ===== */

.stats {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: .9rem; margin: 1.75rem 0; font-family: var(--sans);
}
.stat-card {
  border: 1px solid var(--border); background: var(--surface);
  border-radius: var(--radius); padding: 1.1rem 1.15rem;
  box-shadow: var(--shadow); transition: transform .15s ease, box-shadow .15s ease;
}
.stat-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.stat-value { font-size: 1.85rem; font-weight: 600; color: var(--bronze-deep); font-variant-numeric: tabular-nums; line-height: 1.1; }
.stat-label { font-size: .8rem; color: var(--muted); margin-top: .15rem; }

table { width: 100%; border-collapse: collapse; font-family: var(--sans); font-size: .9rem; margin: 1.25rem 0; }
th, td { border: 1px solid var(--border); padding: .62rem .8rem; text-align: left; vertical-align: top; }
th { background: var(--surface-2); font-weight: 600; }
tr:nth-child(even) td { background: color-mix(in srgb, var(--surface) 60%, transparent); }

.score-bar { height: 7px; background: var(--border); border-radius: 999px; overflow: hidden; margin-top: .3rem; }
.score-fill { height: 100%; background: linear-gradient(90deg, var(--bronze), var(--bronze-deep)); border-radius: 999px; }
.score-fill.full { background: linear-gradient(90deg, var(--accept), var(--accept)); }
.score-fill.low  { background: linear-gradient(90deg, var(--block), var(--block)); }

/* ---- benchmark comparison charts -------------------------------------- */
.cchart {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.25rem 1.35rem; margin: 1.25rem 0;
  box-shadow: var(--shadow);
}
.cchart-head { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.cchart-head h3 { margin: 0; font-size: 1.05rem; }
.cverdict {
  font-family: var(--sans); font-size: .72rem; font-weight: 600; white-space: nowrap;
  padding: .18rem .55rem; border-radius: 999px; border: 1px solid transparent;
}
.cverdict.v-win   { color: var(--accept);  background: var(--accept-bg);  border-color: var(--accept); }
.cverdict.v-mixed { color: var(--abstain); background: var(--abstain-bg); border-color: var(--abstain); }
.cverdict.v-loss  { color: var(--block);   background: var(--block-bg);   border-color: var(--block); }
.cchart-sub { font-family: var(--sans); font-size: .82rem; color: var(--muted); margin: .35rem 0 0; }
.cchart-metric { font-family: var(--sans); font-size: .78rem; color: var(--ink-soft); margin: .55rem 0 .9rem; }
.cchart-metric span { color: var(--muted); font-style: italic; }
.cgroup { margin-bottom: 1rem; }
.cgroup:last-child { margin-bottom: 0; }
.cgroup-label { font-family: var(--sans); font-size: .8rem; font-weight: 600; color: var(--ink-soft); margin-bottom: .45rem; }
.cbar-row { display: grid; grid-template-columns: 190px 1fr; gap: .7rem; align-items: center; margin: .4rem 0; }
.cbar-label { font-family: var(--sans); font-size: .8rem; color: var(--ink-soft); }
.cbar-track { position: relative; background: var(--surface-2); border-radius: var(--radius-sm); height: 26px; overflow: hidden; }
.cbar-fill { height: 100%; border-radius: var(--radius-sm); min-width: 2px; transition: width .5s ease; }
.cbar-fill.is-sophia    { background: linear-gradient(90deg, var(--accept), var(--accept)); }
.cbar-fill.is-rival     { background: linear-gradient(90deg, var(--bronze), var(--bronze-deep)); }
.cbar-fill.is-rival-low { background: linear-gradient(90deg, var(--block), var(--block)); }
.cbar-value {
  position: absolute; left: .55rem; top: 50%; transform: translateY(-50%);
  font-family: var(--mono); font-size: .76rem; font-weight: 500; color: var(--ink);
  text-shadow: 0 0 4px var(--surface), 0 0 4px var(--surface);
}
.bar-ci { font-family: var(--sans); font-size: .68rem; color: var(--ink-soft); margin-left: .4rem; text-shadow: 0 0 4px var(--surface), 0 0 4px var(--surface); }
.cchart-note { font-family: var(--sans); font-size: .8rem; color: var(--muted); margin: .9rem 0 0; line-height: 1.55; border-top: 1px dashed var(--border-soft); padding-top: .7rem; }
.honesty-box {
  background: var(--abstain-bg); border: 1px solid var(--abstain);
  border-radius: var(--radius); padding: 1.1rem 1.35rem; margin: 1.5rem 0;
}
.honesty-box h3 { margin: 0 0 .6rem; font-size: .95rem; color: var(--bronze-deep); }
.honesty-box ul { margin: 0; padding-left: 1.1rem; }
.honesty-box li { font-family: var(--sans); font-size: .83rem; color: var(--ink-soft); margin: .4rem 0; line-height: 1.55; }
@media (max-width: 560px) {
  .cbar-row { grid-template-columns: 1fr; gap: .25rem; }
}

/* council panel — echoes the religion answer format */
.council-panel {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); margin: 1.5rem 0; overflow: hidden; box-shadow: var(--shadow);
}
.council-header {
  font-family: var(--sans); font-size: .8rem; font-weight: 600;
  padding: .8rem 1.1rem; background: var(--bronze-soft);
  border-bottom: 1px solid var(--border);
}
.seat { padding: 1rem 1.2rem; border-bottom: 1px solid var(--border-soft); }
.seat:last-child { border-bottom: none; }
.seat-name { font-family: var(--sans); font-weight: 600; font-size: .85rem; color: var(--bronze-deep); margin-bottom: .3rem; }
.debate { padding: 1rem 1.2rem; background: var(--surface-2); font-style: italic; }

.zh-block {
  margin-top: 1.1rem; padding-top: 1.1rem;
  border-top: 1px dashed var(--border); font-family: var(--serif); color: var(--ink-soft);
}

/* verdict / proof badges */
.proof-boundary {
  border: 1px solid var(--border); border-left: 4px solid var(--abstain);
  background: var(--abstain-bg); color: var(--ink);
  padding: 1rem 1.2rem; margin: 1rem 0 1.5rem;
  font-family: var(--sans); font-size: .92rem; border-radius: var(--radius-sm);
}
.proof-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1rem; margin: 1.5rem 0; }
.proof-card {
  border: 1px solid var(--border); background: var(--surface);
  border-radius: var(--radius); padding: 1.1rem; font-family: var(--sans);
  box-shadow: var(--shadow); position: relative;
}
.proof-card h3 { margin: .35rem 0 .85rem; font-size: 1rem; }
.proof-level { color: var(--bronze-deep); font-family: var(--mono); font-size: .74rem; letter-spacing: .04em; }
.proof-status {
  display: inline-block; border-radius: 999px; padding: .18rem .6rem;
  font-family: var(--mono); font-size: .7rem; letter-spacing: .02em;
  border: 1px solid var(--border); background: var(--surface-2);
}
.proof-status.is-done    { border-color: var(--accept);  background: var(--accept-bg);  color: var(--accept); }
.proof-status.is-partial { border-color: var(--abstain); background: var(--abstain-bg); color: var(--abstain); }
.proof-status.is-open    { border-color: var(--block);   background: var(--block-bg);   color: var(--block); }
.proof-list { font-family: var(--sans); }
.proof-list li { margin-bottom: .45rem; }

.links a { margin-right: 1.3rem; }
.callout {
  border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--surface); padding: 1.1rem 1.25rem; margin: 1.25rem 0;
  font-family: var(--sans); font-size: .92rem; box-shadow: var(--shadow);
}
.callout code { background: var(--surface-2); }

/* ===========================================================  AGENT  ===== */

.agent-panel { border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); font-family: var(--sans); overflow: hidden; box-shadow: var(--shadow); }
.agent-tabs { display: flex; border-bottom: 1px solid var(--border); }
.agent-tab {
  flex: 1; padding: .8rem; border: none; background: transparent; cursor: pointer;
  font-family: var(--sans); font-size: .86rem; color: var(--muted); border-bottom: 2px solid transparent;
}
.agent-tab.active { color: var(--ink); font-weight: 600; border-bottom-color: var(--bronze); background: var(--surface-2); }
.agent-body { padding: 1.25rem; }
.agent-body label { display: block; font-size: .8rem; color: var(--muted); margin-bottom: .4rem; }
textarea {
  width: 100%; min-height: 100px; font-family: var(--sans); font-size: .95rem;
  padding: .75rem; border: 1px solid var(--border); border-radius: var(--radius-sm);
  resize: vertical; background: var(--paper-2); color: var(--ink);
}
button.primary {
  margin-top: .75rem; background: var(--ink); color: var(--paper-2); border: none;
  padding: .68rem 1.3rem; font-family: var(--sans); font-size: .9rem; font-weight: 600;
  cursor: pointer; border-radius: var(--radius-sm);
}
button.primary:hover { background: var(--bronze-deep); color: #fff; }
button.primary:disabled { opacity: .5; cursor: wait; }
.agent-hint { font-size: .8rem; color: var(--muted); margin-top: .5rem; }
.agent-output {
  margin-top: 1rem; padding: 1rem; background: var(--paper-2);
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  font-family: var(--serif); font-size: .95rem; white-space: pre-wrap;
  max-height: 420px; overflow-y: auto; display: none;
}
.agent-output.visible { display: block; }

pre.cite {
  font-family: var(--mono); font-size: .8rem; background: var(--surface-2);
  padding: 1rem; border: 1px solid var(--border); border-radius: var(--radius-sm); overflow-x: auto;
}

footer {
  margin-top: 3rem; padding-top: 1.5rem; border-top: 1px solid var(--border);
  font-family: var(--sans); font-size: .85rem; color: var(--muted);
}

/* ===========================================================  RESPONSIVE  */

@media (max-width: 920px) {
  .layout { grid-template-columns: 1fr; }
  nav.toc {
    position: relative; height: auto; overflow: visible;
    border-right: none; border-bottom: 1px solid var(--border);
    display: flex; flex-direction: column;
  }
  nav.toc .nav-links { display: flex; flex-wrap: wrap; gap: .15rem; }
  nav.toc a { border-left: none; border-bottom: 2px solid transparent; }
  nav.toc a.active { border-left: none; border-bottom-color: var(--bronze); }
  nav.toc .nav-label { width: 100%; }
}
@media (max-width: 560px) {
  body { font-size: 17px; }
  .hero-stat b { font-size: 1.3rem; }
}