/* ════════════════════════════════════════════════════════════════════
   IndiaFinBench — "The Record"
   Archival-editorial design system. Paper, ink, sealing wax, ledger green.
   ════════════════════════════════════════════════════════════════════ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --paper:      #F5F1E8;
  --paper-hi:   #FBF8F1;
  --paper-deep: #EDE7D9;
  --ink:        #1C1812;
  --ink-2:      #4A4338;
  --ink-3:      #8B8270;
  --rule:       rgba(28, 24, 18, 0.14);
  --rule-soft:  rgba(28, 24, 18, 0.08);
  --red:        #A33B20;
  --red-soft:   rgba(163, 59, 32, 0.10);
  --green:      #1F5C45;
  --green-soft: rgba(31, 92, 69, 0.10);
  --gold:       #96752A;
  --gold-soft:  rgba(150, 117, 42, 0.12);
  --saffron:    #C96F12;

  --serif: 'Fraunces', Georgia, serif;
  --sans:  'Archivo', system-ui, sans-serif;
  --mono:  'IBM Plex Mono', ui-monospace, monospace;

  --maxw: 1080px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  position: relative;
}

/* paper grain */
body::before {
  content: '';
  position: fixed; inset: 0;
  pointer-events: none; z-index: 1000;
  opacity: 0.35;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 0.11 0 0 0 0 0.09 0 0 0 0 0.07 0 0 0 0.04 0'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");
}

::selection { background: var(--red); color: var(--paper-hi); }

#archiveCanvas {
  position: fixed; inset: 0; width: 100vw; height: 100vh;
  z-index: 0; pointer-events: none;
}
main, .footer { position: relative; z-index: 2; }

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

a { color: inherit; }
.mono { font-family: var(--mono); }
.c-red { color: var(--red); }
.c-green { color: var(--green); }

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--ink); color: var(--paper); padding: 10px 18px;
  font-size: 13px; z-index: 2000; text-decoration: none;
}
.skip-link:focus { left: 12px; top: 12px; }

/* ════════ MASTHEAD ════════ */
.masthead {
  position: fixed; top: 0; left: 0; right: 0; z-index: 600;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--rule);
}
.masthead::after {
  content: ''; display: block; height: 1px;
  background: var(--rule-soft); margin-top: 2px;
}
.masthead-inner {
  max-width: 1280px; margin: 0 auto;
  height: 60px; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.brand { display: flex; align-items: baseline; gap: 10px; text-decoration: none; }
.brand-seal {
  font-family: var(--serif); font-weight: 700; font-size: 22px;
  color: var(--red); line-height: 1;
}
.brand-word {
  font-family: var(--serif); font-size: 19px; font-weight: 600;
  letter-spacing: -0.01em;
}
.brand-word em { font-style: italic; color: var(--red); }
.mast-nav { display: flex; gap: 4px; }
.mast-nav a {
  font-size: 13px; font-weight: 500; color: var(--ink-2);
  text-decoration: none; padding: 7px 11px; border-radius: 2px;
  transition: color 0.15s, background 0.15s;
}
.mast-nav a:hover, .mast-nav a.active { color: var(--red); background: var(--red-soft); }
.mast-actions { display: flex; align-items: center; gap: 8px; }
.mast-btn {
  font-size: 12.5px; font-weight: 600; text-decoration: none;
  padding: 7px 14px; border: 1px solid var(--rule);
  color: var(--ink-2); border-radius: 2px;
  transition: border-color 0.15s, color 0.15s, background 0.15s;
}
.mast-btn:hover { border-color: var(--ink); color: var(--ink); }
.mast-btn-solid { background: var(--ink); color: var(--paper-hi); border-color: var(--ink); }
.mast-btn-solid:hover { background: var(--red); border-color: var(--red); color: var(--paper-hi); }
.mast-menu {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 8px;
}
.mast-menu span { width: 20px; height: 2px; background: var(--ink); transition: transform 0.2s; }
.mast-menu[aria-expanded="true"] span:first-child { transform: translateY(3.5px) rotate(45deg); }
.mast-menu[aria-expanded="true"] span:last-child { transform: translateY(-3.5px) rotate(-45deg); }
.mast-drawer {
  display: none; flex-direction: column;
  border-top: 1px solid var(--rule); background: var(--paper-hi);
}
.mast-drawer.open { display: flex; }
.mast-drawer a {
  padding: 14px 24px; text-decoration: none; font-size: 14px;
  font-family: var(--mono); color: var(--ink-2);
  border-bottom: 1px solid var(--rule-soft);
}
.mast-drawer a:hover { color: var(--red); background: var(--red-soft); }

/* ════════ PROGRESS RAIL ════════ */
.rail {
  position: fixed; left: 26px; top: 50%; transform: translateY(-50%);
  z-index: 500; display: flex; gap: 14px; align-items: stretch;
}
.rail-line { width: 1px; background: var(--rule); position: relative; }
.rail-fill {
  position: absolute; top: 0; left: 0; width: 100%; height: 0%;
  background: var(--red); transition: height 0.2s linear;
}
.rail-list { list-style: none; display: flex; flex-direction: column; gap: 18px; }
.rail-list a {
  display: flex; align-items: baseline; gap: 8px;
  text-decoration: none; opacity: 0.45; transition: opacity 0.2s;
}
.rail-list a b { font-family: var(--mono); font-size: 10px; font-weight: 600; color: var(--red); }
.rail-list a span {
  font-size: 11px; font-weight: 500; letter-spacing: 0.06em;
  text-transform: uppercase; color: var(--ink-2);
}
.rail-list li.on a, .rail-list a:hover { opacity: 1; }
@media (max-width: 1320px) { .rail { display: none; } }

/* ════════ BUTTONS / CHIPS / INPUTS ════════ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: var(--sans); font-size: 14px; font-weight: 600;
  padding: 12px 24px; border-radius: 2px; text-decoration: none;
  cursor: pointer; transition: background 0.15s, color 0.15s, border-color 0.15s, transform 0.1s;
  border: 1px solid transparent;
}
.btn:active { transform: translateY(1px); }
.btn-ink { background: var(--ink); color: var(--paper-hi); border-color: var(--ink); }
.btn-ink:hover { background: var(--red); border-color: var(--red); }
.btn-ink:disabled { opacity: 0.45; cursor: not-allowed; }
.btn-line { background: transparent; color: var(--ink); border-color: var(--rule); }
.btn-line:hover { border-color: var(--red); color: var(--red); }
.btn-sm { padding: 8px 16px; font-size: 13px; }

.chip {
  font-family: var(--sans); font-size: 12.5px; font-weight: 500;
  padding: 7px 14px; background: var(--paper-hi);
  border: 1px solid var(--rule); border-radius: 100px;
  color: var(--ink-2); cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
}
.chip:hover { color: var(--red); border-color: var(--red); }

.input, .select {
  font-family: var(--sans); font-size: 14px; color: var(--ink);
  background: var(--paper-hi); border: 1px solid var(--rule);
  border-radius: 2px; padding: 11px 14px; outline: none; width: 100%;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.input:focus, .select:focus { border-color: var(--red); box-shadow: 0 0 0 3px var(--red-soft); }
.input::placeholder { color: var(--ink-3); }
.select { cursor: pointer; }

/* ════════ HERO ════════ */
.hero {
  position: relative; z-index: 2;
  padding: 168px 24px 0;
  border-bottom: 1px solid var(--rule);
}
/* radial paper glow keeps the headline column clear of the archive scene */
.hero::before {
  content: ''; position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background: radial-gradient(ellipse 56% 54% at 50% 40%,
    var(--paper) 30%,
    color-mix(in srgb, var(--paper) 72%, transparent) 62%,
    transparent 100%);
}
.hero-inner {
  position: relative; z-index: 2;
  max-width: var(--maxw); margin: 0 auto; text-align: center;
}
.hero-kicker {
  font-family: var(--mono); font-size: 12px; font-weight: 500;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--red);
  margin-bottom: 28px;
}
.hero-kicker::before, .hero-kicker::after {
  content: '———'; letter-spacing: -0.18em; color: var(--rule);
  margin: 0 14px; vertical-align: 2px;
}
.hero-title {
  font-family: var(--serif); font-optical-sizing: auto;
  font-size: clamp(44px, 7.4vw, 96px); font-weight: 560;
  line-height: 1.02; letter-spacing: -0.022em;
  max-width: 15ch; margin: 0 auto 28px;
}
.hero-title em { font-style: italic; color: var(--red); }
.hero-sub {
  font-size: clamp(15px, 1.7vw, 18px); color: var(--ink-2);
  max-width: 620px; margin: 0 auto 40px; line-height: 1.75;
}
.hero-sub strong { color: var(--ink); font-weight: 600; }
.hero-cta { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; margin-bottom: 64px; }

.hero-scrollcue {
  font-family: var(--mono); font-size: 11px; font-weight: 500;
  letter-spacing: 0.16em; text-transform: uppercase; color: var(--ink-3);
  margin-bottom: 56px;
}
.cue-arrow { display: inline-block; margin-left: 10px; color: var(--red); animation: cue-drop 2s var(--ease) infinite; }
@keyframes cue-drop { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(5px); } }

.hero-ledger {
  position: relative; z-index: 2;
  max-width: 1180px; margin: 0 auto;
  display: grid; grid-template-columns: repeat(6, 1fr);
  border: 1px solid var(--rule); border-bottom: none;
  background: color-mix(in srgb, var(--paper-hi) 78%, transparent);
  backdrop-filter: blur(6px);
}
.ledger-cell {
  padding: 26px 18px 22px; text-align: center;
  border-right: 1px solid var(--rule-soft);
}
.ledger-cell:last-child { border-right: none; }
.ledger-num {
  display: block; font-family: var(--serif); font-weight: 600;
  font-size: clamp(26px, 3vw, 40px); letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums; line-height: 1.1; margin-bottom: 6px;
}
.ledger-cell:nth-child(odd) .ledger-num { color: var(--ink); }
.ledger-cell:nth-child(even) .ledger-num { color: var(--red); }
.ledger-lbl {
  font-size: 10.5px; font-weight: 600; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--ink-3);
}
@media (max-width: 980px) { .hero-ledger { grid-template-columns: repeat(3, 1fr); } .ledger-cell:nth-child(3) { border-right: none; } .ledger-cell:nth-child(-n+3) { border-bottom: 1px solid var(--rule-soft); } }
@media (max-width: 560px) { .hero-ledger { grid-template-columns: repeat(2, 1fr); } .ledger-cell { border-right: 1px solid var(--rule-soft) !important; } .ledger-cell:nth-child(2n) { border-right: none !important; } .ledger-cell:nth-child(-n+4) { border-bottom: 1px solid var(--rule-soft); } }

/* ════════ CHAPTERS ════════ */
.chapter { padding: 110px 24px; position: relative; }
.chapter > * { max-width: var(--maxw); margin-left: auto; margin-right: auto; }
.ch-alt {
  background: color-mix(in srgb, var(--paper-deep) 91%, transparent);
  border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule);
}

.ch-head { margin-bottom: 56px; position: relative; }
.ch-no {
  font-family: var(--mono); font-size: 13px; font-weight: 600;
  letter-spacing: 0.18em; color: var(--red);
  display: inline-block; margin-bottom: 14px;
}
.ch-no::after {
  content: ''; display: inline-block; width: 64px; height: 1px;
  background: var(--red); margin-left: 16px; vertical-align: 4px; opacity: 0.5;
}
.ch-title {
  font-family: var(--serif); font-size: clamp(34px, 4.6vw, 56px);
  font-weight: 560; letter-spacing: -0.02em; line-height: 1.05;
  margin-bottom: 14px;
}
.ch-lede {
  font-family: var(--serif); font-style: italic; font-size: clamp(17px, 2vw, 21px);
  color: var(--ink-2); max-width: 60ch;
}

.prose { font-size: 16px; line-height: 1.8; color: var(--ink-2); }
.prose strong { color: var(--ink); }
.prose-narrow { max-width: 70ch; margin-bottom: 48px; }

/* vellum: frosted-paper panel that guarantees legibility over the scene */
.vellum {
  background: color-mix(in srgb, var(--paper) 70%, transparent);
  -webkit-backdrop-filter: blur(10px) saturate(130%);
  backdrop-filter: blur(10px) saturate(130%);
  border: 1px solid var(--rule-soft);
  padding: 30px 34px;
}
@supports not (backdrop-filter: blur(1px)) {
  .vellum { background: color-mix(in srgb, var(--paper) 94%, transparent); }
}

.prose-cols {
  columns: 2; column-gap: 56px; column-rule: 1px solid var(--rule-soft);
  margin-bottom: 64px; font-size: 16px; line-height: 1.8; color: var(--ink-2);
}
.prose-cols p { break-inside: avoid; margin-bottom: 1em; }
.prose-cols p:first-child::first-letter {
  font-family: var(--serif); font-size: 3.4em; font-weight: 600;
  float: left; line-height: 0.82; padding: 4px 10px 0 0; color: var(--red);
}
@media (max-width: 760px) { .prose-cols { columns: 1; } }

/* ════════ §01 PROBLEM ════════ */
.problem-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px;
  background: var(--rule); border: 1px solid var(--rule);
  margin-bottom: 72px;
}
@media (max-width: 820px) { .problem-grid { grid-template-columns: 1fr; } }
.problem-card { background: var(--paper-hi); padding: 32px 28px; position: relative; }
.pc-no {
  font-family: var(--serif); font-style: italic; font-size: 30px;
  color: var(--red); display: block; margin-bottom: 16px; line-height: 1;
}
.problem-card h3 {
  font-family: var(--serif); font-size: 20px; font-weight: 600;
  letter-spacing: -0.01em; margin-bottom: 10px;
}
.problem-card p { font-size: 14px; line-height: 1.7; color: var(--ink-2); }

/* specimen exhibit */
.specimen {
  border: 1px solid var(--ink); background: var(--paper-hi);
  box-shadow: 4px 4px 0 var(--rule-soft);
  padding: 0;
}
.spec-head {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 14px 24px; border-bottom: 1px solid var(--rule);
}
.spec-tag {
  font-family: var(--mono); font-size: 11px; font-weight: 600;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--paper-hi); background: var(--red); padding: 4px 10px;
}
.spec-src { font-family: var(--mono); font-size: 12px; color: var(--ink-3); }
.spec-body {
  font-family: var(--serif); font-size: clamp(18px, 2.2vw, 23px);
  line-height: 1.85; padding: 36px 40px; color: var(--ink);
}
.spec-body mark {
  background: transparent; padding: 1px 3px; position: relative;
  border-bottom: 2px solid; white-space: nowrap;
}
.m-num   { color: var(--red);    border-color: var(--red);    background: var(--red-soft); }
.m-scope { color: var(--green);  border-color: var(--green);  background: var(--green-soft); }
.m-ref   { color: var(--gold);   border-color: var(--gold);   background: var(--gold-soft); }
.spec-body mark::after {
  content: attr(data-note);
  position: absolute; left: 50%; bottom: calc(100% + 8px); transform: translateX(-50%) translateY(4px);
  font-family: var(--mono); font-size: 10.5px; font-style: normal; white-space: nowrap;
  background: var(--ink); color: var(--paper-hi); padding: 5px 10px;
  opacity: 0; pointer-events: none; transition: opacity 0.18s, transform 0.18s;
}
.spec-body mark:hover::after { opacity: 1; transform: translateX(-50%) translateY(0); }
.spec-legend {
  display: flex; flex-wrap: wrap; gap: 22px;
  padding: 14px 24px; border-top: 1px solid var(--rule);
  font-family: var(--mono); font-size: 11.5px; color: var(--ink-2);
}
.spec-legend span { display: inline-flex; align-items: center; gap: 8px; }
.lg { width: 14px; height: 3px; display: inline-block; }
.lg-num { background: var(--red); } .lg-scope { background: var(--green); } .lg-ref { background: var(--gold); }

/* ════════ §02 CORPUS ════════ */
.corpus-grid { display: grid; grid-template-columns: 5fr 6fr; gap: 56px; align-items: start; }
@media (max-width: 880px) { .corpus-grid { grid-template-columns: 1fr; } }
.corpus-copy .prose { margin-bottom: 32px; }
.corpus-stats { border-top: 1px solid var(--rule); }
.corpus-stats > div {
  display: flex; justify-content: space-between; align-items: baseline;
  padding: 11px 2px; border-bottom: 1px solid var(--rule-soft);
}
.corpus-stats dt { font-size: 13.5px; color: var(--ink-2); }
.corpus-stats dd { font-size: 14px; font-weight: 600; }

.doc-field { border: 1px solid var(--rule); background: var(--paper-hi); padding: 28px; }
.doc-dots {
  display: grid; grid-template-columns: repeat(16, 1fr); gap: 7px;
  margin-bottom: 20px;
}
.doc-dots i {
  aspect-ratio: 3 / 4; border-radius: 1px; display: block;
  opacity: 0; transform: scale(0.4) ;
  transition: opacity 0.4s var(--ease), transform 0.4s var(--ease);
  transition-delay: var(--d, 0s);
}
.doc-dots.shown i { opacity: 1; transform: scale(1); }
.doc-dots .sebi { background: var(--green); }
.doc-dots .rbi { background: var(--red); }
.doc-field figcaption {
  display: flex; gap: 22px; align-items: center;
  font-family: var(--mono); font-size: 12px; color: var(--ink-2);
}
.doc-field figcaption span { display: inline-flex; align-items: center; gap: 8px; }
.doc-total { margin-left: auto; color: var(--ink); font-weight: 600; }
.dot { width: 9px; height: 12px; border-radius: 1px; display: inline-block; }
.dot-sebi { background: var(--green); } .dot-rbi { background: var(--red); }

/* ════════ §03 BENCHMARK ════════ */
.pipeline {
  list-style: none; counter-reset: step;
  display: grid; grid-template-columns: repeat(5, 1fr);
  border: 1px solid var(--rule); background: var(--paper-hi);
  margin-bottom: 64px;
}
@media (max-width: 940px) { .pipeline { grid-template-columns: 1fr; } }
.pipeline li {
  counter-increment: step;
  padding: 26px 22px 24px; position: relative;
  border-right: 1px solid var(--rule-soft);
}
.pipeline li:last-child { border-right: none; }
@media (max-width: 940px) { .pipeline li { border-right: none; border-bottom: 1px solid var(--rule-soft); } .pipeline li:last-child { border-bottom: none; } }
.pipeline li::before {
  content: '0' counter(step);
  font-family: var(--mono); font-size: 11px; font-weight: 600;
  color: var(--red); letter-spacing: 0.12em; display: block; margin-bottom: 12px;
}
.pipeline li:not(:last-child)::after {
  content: '→'; position: absolute; right: -7px; top: 28px;
  color: var(--red); font-size: 14px; z-index: 2;
}
@media (max-width: 940px) { .pipeline li::after { display: none; } }
.pipeline b {
  display: block; font-family: var(--serif); font-size: 19px;
  font-weight: 600; margin-bottom: 7px;
}
.pipeline span { font-size: 12.5px; line-height: 1.6; color: var(--ink-2); }

.task-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  background: var(--rule); border: 1px solid var(--rule);
  margin-bottom: 48px;
}
@media (max-width: 940px) { .task-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .task-grid { grid-template-columns: 1fr; } }
.task-card { background: var(--paper-hi); padding: 28px 24px; }
.task-code {
  font-family: var(--mono); font-size: 13px; font-weight: 600;
  letter-spacing: 0.1em; padding: 3px 9px; border: 1px solid currentColor;
  display: inline-block; margin-bottom: 16px;
}
.task-card h3 { font-family: var(--serif); font-size: 18px; font-weight: 600; margin-bottom: 8px; letter-spacing: -0.01em; }
.task-card p { font-size: 13px; line-height: 1.65; color: var(--ink-2); margin-bottom: 16px; }
.task-n { font-family: var(--mono); font-size: 12px; color: var(--ink-3); }
.task-n b { color: var(--ink); font-weight: 600; }
.task-meter { height: 3px; background: var(--rule-soft); margin-top: 10px; overflow: hidden; }
.task-meter i { display: block; height: 100%; width: 0; transition: width 1.1s var(--ease) 0.2s; }
.shown .task-meter i { width: var(--w); }

.diff-strip { }
.diff-bar-outer {
  display: flex; height: 56px; border: 1px solid var(--rule);
  background: var(--paper-hi); overflow: hidden; margin-bottom: 14px;
}
.diff-seg {
  width: 0; display: flex; align-items: center; justify-content: center;
  transition: width 1.2s var(--ease); overflow: hidden; position: relative;
}
.shown .diff-seg { width: var(--w); }
.diff-seg span {
  font-family: var(--mono); font-size: 12px; font-weight: 600; white-space: nowrap;
}
.ds-easy { background: var(--green-soft); color: var(--green); border-right: 1px solid var(--rule-soft); }
.ds-med  { background: var(--gold-soft); color: var(--gold); border-right: 1px solid var(--rule-soft); }
.ds-hard { background: var(--red-soft); color: var(--red); }
.diff-note { font-size: 13px; color: var(--ink-3); }

/* ════════ PANELS (shared) ════════ */
.panel {
  background: var(--paper-hi); border: 1px solid var(--rule);
  padding: 32px; margin-bottom: 28px;
}
.panel-bar {
  display: flex; align-items: flex-start; justify-content: space-between;
  gap: 24px; flex-wrap: wrap; margin-bottom: 28px;
}
.panel-title { font-family: var(--serif); font-size: 24px; font-weight: 600; letter-spacing: -0.01em; margin-bottom: 6px; }
.panel-sub { font-size: 13.5px; color: var(--ink-3); max-width: 64ch; }

.tabset { display: inline-flex; border: 1px solid var(--rule); background: var(--paper); }
.tab {
  font-family: var(--mono); font-size: 12.5px; font-weight: 500;
  padding: 9px 18px; background: none; border: none; cursor: pointer;
  color: var(--ink-3); border-right: 1px solid var(--rule-soft);
  transition: color 0.15s, background 0.15s;
}
.tab:last-child { border-right: none; }
.tab:hover { color: var(--ink); }
.tab.active { background: var(--ink); color: var(--paper-hi); }

/* ════════ §04 CHART ════════ */
.chart { position: relative; padding: 8px 0 30px; }
.chart-baseline {
  position: absolute; top: 0; bottom: 30px; width: 0;
  border-left: 2px dashed var(--red); opacity: 0.55;
  transition: left 0.9s var(--ease);
  pointer-events: none; z-index: 3;
}
.chart-baseline em {
  position: absolute; bottom: -26px; left: 50%; transform: translateX(-50%);
  font-family: var(--mono); font-style: normal; font-size: 10.5px;
  color: var(--red); white-space: nowrap;
}
.crow { display: flex; align-items: center; gap: 14px; margin-bottom: 9px; position: relative; }
.crow-label {
  width: 168px; min-width: 168px; text-align: right;
  display: flex; align-items: baseline; justify-content: flex-end; gap: 8px;
}
.crow-rank { font-family: var(--serif); font-style: italic; font-size: 13px; color: var(--ink-3); }
.crow-name {
  font-size: 13.5px; font-weight: 600; white-space: nowrap;
  overflow: hidden; text-overflow: ellipsis;
}
.crow-track { flex: 1; height: 34px; background: var(--rule-soft); position: relative; }
.crow-fill {
  height: 100%; width: 0; position: relative;
  transition: width 1.1s var(--ease);
  display: flex; align-items: center;
}
.crow-fill::after { content: ''; position: absolute; right: 0; top: 0; bottom: 0; width: 3px; background: var(--ink); }
.t1 .crow-fill { background: var(--ink); }
.t2 .crow-fill { background: color-mix(in srgb, var(--ink) 64%, var(--paper)); }
.t3 .crow-fill { background: color-mix(in srgb, var(--ink) 40%, var(--paper)); }
.t1 .crow-fill::after { background: var(--red); }
.crow-val {
  position: absolute; left: calc(100% + 10px); top: 50%; transform: translateY(-50%);
  font-family: var(--mono); font-size: 12.5px; font-weight: 600;
  color: var(--ink); white-space: nowrap; opacity: 0; transition: opacity 0.3s 0.7s;
}
.crow-fill.shown .crow-val { opacity: 1; }
.crow-tip {
  position: absolute; bottom: calc(100% + 10px); left: 50%; transform: translateX(-50%);
  background: var(--ink); color: var(--paper-hi); padding: 12px 16px;
  font-size: 12px; white-space: nowrap; z-index: 50;
  opacity: 0; pointer-events: none; transition: opacity 0.15s;
  box-shadow: 4px 4px 0 var(--rule);
}
.crow-track:hover .crow-tip { opacity: 1; }
.crow-tip b { display: block; font-size: 13px; margin-bottom: 8px; padding-bottom: 7px; border-bottom: 1px solid rgba(251,248,241,0.25); }
.crow-tip .tt-grid { display: grid; grid-template-columns: auto auto; gap: 3px 20px; font-family: var(--mono); font-size: 11.5px; }
.crow-tip .tt-grid i { font-style: normal; color: rgba(251,248,241,0.55); }
.crow-tip .tt-ci { margin-top: 7px; font-size: 10.5px; color: rgba(251,248,241,0.5); text-align: center; }
.crow.human .crow-name { font-weight: 400; font-style: italic; color: var(--ink-2); }
.crow.human .crow-fill { background: repeating-linear-gradient(135deg, var(--rule), var(--rule) 4px, transparent 4px, transparent 8px); }
.crow.human .crow-fill::after { background: var(--ink-3); }
.chart-foot { font-size: 12.5px; color: var(--ink-3); margin-top: 24px; max-width: 70ch; }
.chart-foot strong { color: var(--ink-2); }
@media (max-width: 640px) {
  .crow-label { width: 108px; min-width: 108px; }
  .crow-name { font-size: 12px; }
  .crow-val { display: none; }
}

/* ════════ TABLES ════════ */
.table-scroll { overflow-x: auto; }
.gz-table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.gz-table thead tr { border-top: 2px solid var(--ink); border-bottom: 1px solid var(--ink); }
.gz-table th {
  font-family: var(--mono); font-size: 11px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.08em; color: var(--ink-2);
  text-align: left; padding: 12px 14px; white-space: nowrap; user-select: none;
}
.gz-table th.c, .gz-table td.c { text-align: center; }
.gz-table th.sortable { cursor: pointer; }
.gz-table th.sortable:hover { color: var(--red); }
.gz-table th.sorted { color: var(--red); }
.gz-table th.sorted::after { content: ' ↓'; }
.th-n { font-size: 9.5px; color: var(--ink-3); text-transform: none; letter-spacing: 0; }
.gz-table tbody tr { border-bottom: 1px solid var(--rule-soft); transition: background 0.12s; }
.gz-table tbody tr:hover { background: var(--red-soft); }
.gz-table td { padding: 13px 14px; white-space: nowrap; vertical-align: middle; }
.gz-table td.mono, .gz-table .mono { font-family: var(--mono); font-size: 12.5px; }
.row-hi { background: var(--green-soft); }
.row-hi:hover { background: var(--green-soft) !important; }
.cfg { font-family: var(--mono); font-size: 10.5px; color: var(--ink-3); margin-left: 6px; }
.cfg-pick {
  font-family: var(--mono); font-size: 10px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.08em;
  background: var(--green); color: var(--paper-hi); padding: 2px 8px; margin-left: 8px;
}

.rank-cell { font-family: var(--serif); font-style: italic; font-size: 15px; }
.rank-1 { color: var(--gold); font-weight: 700; }
.model-cell-name { font-weight: 600; font-size: 13.5px; }
.model-cell-id { font-family: var(--mono); font-size: 10.5px; color: var(--ink-3); margin-top: 2px; }
.score {
  font-family: var(--mono); font-size: 12.5px; font-weight: 600;
  padding: 3px 8px; display: inline-block; min-width: 56px;
}
.s-hi { background: var(--green-soft); color: var(--green); }
.s-md { background: var(--gold-soft); color: var(--gold); }
.s-lo { background: var(--red-soft); color: var(--red); }
.score-best { box-shadow: inset 0 0 0 1px currentColor; }
.access-tag {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.04em;
  border: 1px solid var(--rule); padding: 3px 9px; color: var(--ink-2);
  border-radius: 100px; white-space: nowrap;
}
.tr-human td { background: var(--paper); }
.tr-human .model-cell-name { font-style: italic; font-weight: 400; }
.tr-subset td { background: var(--gold-soft); }
.ci-cell { font-family: var(--mono); font-size: 11px; color: var(--ink-3); }
.delta-up { color: var(--green); font-weight: 600; }
.delta-down { color: var(--red); font-weight: 600; }

/* ════════ §05 FINDINGS ════════ */
.findings-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px;
  background: var(--rule); border: 1px solid var(--rule);
}
@media (max-width: 980px) { .findings-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .findings-grid { grid-template-columns: 1fr; } }
.finding { background: var(--paper-hi); padding: 32px 28px; position: relative; overflow: hidden; }
.finding::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--red); transform: scaleX(0); transform-origin: left;
  transition: transform 0.7s var(--ease) 0.15s;
}
.finding.shown::before { transform: scaleX(1); }
.f-no {
  font-family: var(--mono); font-size: 10.5px; font-weight: 600;
  letter-spacing: 0.16em; text-transform: uppercase; color: var(--ink-3);
}
.f-stat {
  font-family: var(--serif); font-size: clamp(30px, 3.4vw, 42px);
  font-weight: 600; letter-spacing: -0.02em; color: var(--red);
  margin: 10px 0 14px; line-height: 1; font-variant-numeric: tabular-nums;
}
.finding h3 { font-family: var(--serif); font-size: 18.5px; font-weight: 600; letter-spacing: -0.01em; line-height: 1.3; margin-bottom: 10px; }
.finding p:last-child { font-size: 13.5px; line-height: 1.7; color: var(--ink-2); }

/* ════════ §06 RETRIEVAL ════════ */
.rag-diagram { margin-bottom: 28px; border: 1px solid var(--rule); background: var(--paper-hi); padding: 24px 16px; }
.rag-diagram svg { width: 100%; height: auto; display: block; color: var(--ink-3); }
.rd-node rect { fill: var(--paper); stroke: var(--ink); stroke-width: 1.25; }
.rd-dense rect { stroke: var(--green); } .rd-dense .rd-t1 { fill: var(--green); }
.rd-sparse rect { stroke: var(--red); } .rd-sparse .rd-t1 { fill: var(--red); }
.rd-rrf rect { fill: var(--ink); stroke: var(--ink); }
.rd-rrf .rd-t1, .rd-rrf .rd-t2 { fill: var(--paper-hi); }
.rd-t1 { font-family: var(--sans); font-size: 15px; font-weight: 600; fill: var(--ink); }
.rd-t2 { font-family: var(--mono); font-size: 10px; fill: var(--ink-3); }
.rd-rrf .rd-t2 { fill: rgba(251,248,241,0.6); }
.rd-flow {
  fill: none; stroke: var(--ink-3); stroke-width: 1.25;
  stroke-dasharray: 5 5;
}
.shown .rd-flow { animation: flow 1.2s linear infinite; }
@keyframes flow { to { stroke-dashoffset: -20; } }

.panel-live { border-color: var(--ink); box-shadow: 5px 5px 0 var(--rule-soft); }
.live-dot {
  display: inline-block; width: 9px; height: 9px; border-radius: 50%;
  background: var(--green); margin-right: 10px; vertical-align: 2px;
  animation: pulse 2.2s ease infinite;
}
@keyframes pulse { 0%,100% { box-shadow: 0 0 0 0 var(--green-soft); } 50% { box-shadow: 0 0 0 7px var(--green-soft); } }
.rag-row { display: flex; gap: 10px; margin-bottom: 14px; }
.rag-input { flex: 1; }
@media (max-width: 560px) { .rag-row { flex-direction: column; } }
.rag-examples { display: flex; flex-wrap: wrap; gap: 8px; }
.rag-out { margin-top: 26px; border-top: 1px solid var(--rule); padding-top: 22px; }
.rag-status { display: flex; align-items: center; gap: 10px; font-family: var(--mono); font-size: 12.5px; color: var(--ink-2); margin-bottom: 14px; }
.spinner {
  width: 14px; height: 14px; border: 2px solid var(--rule);
  border-top-color: var(--red); border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.rag-answer { font-size: 15px; line-height: 1.85; color: var(--ink); white-space: pre-wrap; margin-bottom: 22px; }
.rag-answer:empty { margin: 0; }
.rag-sources { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 14px; }
.rag-src {
  border: 1px solid var(--rule); background: var(--paper); padding: 16px;
}
.rag-src-no {
  font-family: var(--mono); font-size: 10px; font-weight: 600;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--red);
  margin-bottom: 6px;
}
.rag-src-title { font-size: 13px; font-weight: 600; line-height: 1.4; margin-bottom: 8px; }
.rag-src-text {
  font-size: 12px; line-height: 1.65; color: var(--ink-2);
  display: -webkit-box; -webkit-line-clamp: 5; -webkit-box-orient: vertical; overflow: hidden;
  margin-bottom: 12px;
}
.rag-src-scores {
  display: flex; gap: 12px; font-family: var(--mono); font-size: 10px;
  color: var(--ink-3); border-top: 1px solid var(--rule-soft); padding-top: 9px;
}
.rag-src-scores b { color: var(--ink-2); font-weight: 600; }

/* ════════ §07 ACCESS ════════ */
.explorer-controls { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.explorer-controls .select { width: auto; }
.ex-card { border-top: 1px solid var(--rule); padding-top: 24px; }
.ex-meta { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-bottom: 18px; }
.ex-id { font-size: 11px; color: var(--ink-3); }
.ex-badge {
  font-family: var(--mono); font-size: 10.5px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.08em;
  border: 1px solid var(--rule); padding: 3px 10px; color: var(--ink-2);
}
.ex-label {
  font-family: var(--mono); font-size: 10.5px; font-weight: 600;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--red);
  margin-bottom: 7px;
}
.ex-context {
  font-family: var(--serif); font-size: 16px; line-height: 1.8; color: var(--ink-2);
  border-left: 2px solid var(--rule); padding: 4px 0 4px 20px; margin-bottom: 20px;
}
.ex-question { font-size: 16px; font-weight: 600; margin-bottom: 20px; }
.ex-answer { margin-top: 18px; background: var(--green-soft); border: 1px solid var(--green); padding: 16px 20px; }
.ex-answer .mono { font-size: 14px; color: var(--green); font-weight: 600; }

.access-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; align-items: start; }
@media (max-width: 880px) { .access-grid { grid-template-columns: 1fr; } }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 20px; }
@media (max-width: 560px) { .form-grid { grid-template-columns: 1fr; } }
.field { display: flex; flex-direction: column; gap: 6px; }
.field > span { font-size: 12.5px; font-weight: 600; color: var(--ink-2); }
.field em { color: var(--red); font-style: normal; }
.form-foot { display: flex; flex-direction: column; gap: 14px; }
.status { font-size: 13px; line-height: 1.6; padding: 12px 16px; border: 1px solid var(--rule); white-space: pre-line; }
.status.ok { border-color: var(--green); background: var(--green-soft); color: var(--green); }
.status.err { border-color: var(--red); background: var(--red-soft); color: var(--red); }

.cite-box { position: relative; background: var(--paper); border: 1px solid var(--rule); padding: 18px 20px; margin-bottom: 18px; }
.cite-box pre { font-size: 11.5px; line-height: 1.8; overflow-x: auto; color: var(--ink-2); }
.copy-btn {
  position: absolute; top: 10px; right: 10px;
  font-family: var(--mono); font-size: 11px; font-weight: 600;
  padding: 5px 12px; background: var(--paper-hi); border: 1px solid var(--rule);
  cursor: pointer; color: var(--ink-2); transition: color 0.15s, border-color 0.15s;
}
.copy-btn:hover { color: var(--red); border-color: var(--red); }
.access-links { display: flex; gap: 10px; flex-wrap: wrap; }

/* ════════ FOOTER ════════ */
.footer { padding: 64px 24px 56px; text-align: center; border-top: 1px solid var(--rule); position: relative; }
.footer-rule {
  width: 64px; height: 3px; background: var(--red); margin: 0 auto 28px;
}
.footer-brand { font-family: var(--serif); font-size: 22px; font-weight: 600; margin-bottom: 10px; }
.footer-brand em { font-style: italic; color: var(--red); }
.footer-brand .brand-seal { font-size: 18px; margin-right: 6px; }
.footer-line { font-size: 14px; color: var(--ink-2); margin-bottom: 6px; }
.footer-line a { color: var(--red); text-decoration: none; }
.footer-line a:hover { text-decoration: underline; }
.footer-sub { font-family: var(--mono); font-size: 11px; color: var(--ink-3); letter-spacing: 0.04em; }

/* ════════ REVEAL ════════ */
.reveal {
  opacity: 0; transform: translateY(26px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}
.reveal.shown { opacity: 1; transform: translateY(0); }

/* ════════ RESPONSIVE / MOTION ════════ */
@media (max-width: 1060px) {
  .mast-nav { display: none; }
}
@media (max-width: 680px) {
  .mast-actions .mast-btn { display: none; }
  .mast-menu { display: flex; }
  .chapter { padding: 72px 18px; }
  .hero { padding-top: 130px; }
  .panel { padding: 22px 18px; }
  .spec-body { padding: 26px 22px; }
  .spec-body mark { white-space: normal; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
  .crow-fill, .diff-seg, .task-meter i { width: var(--w, 100%); }
}