/* ==========================================================================
   Fiction Units, shared stylesheet
   Design language: precision instrument / ruler & caliper markings
   ========================================================================== */

:root {
  /* Color tokens */
  --paper:        #F5F5F2;
  --surface:      #FFFFFF;
  --surface-2:    #EFEEE9;
  --ink:          #181B20;
  --ink-soft:     #565C66;
  --ink-faint:    #8A8F98;
  --line:         #DEDCD4;
  --line-strong:  #C7C4B8;
  --accent:       #1E5AA8;   /* blueprint ink */
  --accent-dark:  #163F78;
  --accent-tint:  #E7EEF8;
  --brass:        #B8791F;   /* instrument brass */
  --brass-tint:   #FBF1E1;
  --good:         #2F8F5B;
  --fiction:       #6B4FBB;   /* fictional-unit accent: violet */
  --fiction-dark:  #4F3792;
  --fiction-tint:  #F1EDFB;

  /* Type */
  --font-display: 'Space Grotesk', 'Arial Narrow', sans-serif;
  --font-body:    'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono:    'IBM Plex Mono', 'SFMono-Regular', Consolas, monospace;

  /* Layout */
  --maxw: 1120px;
  --radius-s: 6px;
  --radius-m: 12px;
  --radius-l: 18px;
  --shadow-card: 0 1px 2px rgba(24,27,32,0.04), 0 8px 24px rgba(24,27,32,0.05);
}

* { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 74px;
  color-scheme: light;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

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

a { color: inherit; text-decoration: none; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.12;
  margin: 0 0 0.5em;
  letter-spacing: -0.01em;
}

p { margin: 0 0 1em; color: var(--ink-soft); }

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px;
}

/* Focus visibility everywhere */
a:focus-visible, button:focus-visible, select:focus-visible,
input:focus-visible, .chip:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

/* ---------- Tick-rule motif (signature element) ---------- */
/* ---------- Accessibility: skip link ---------- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink);
  color: var(--surface);
  padding: 10px 16px;
  border-radius: 0 0 var(--radius-s) 0;
  z-index: 100;
  font-size: 0.9rem;
  font-weight: 600;
}
.skip-link:focus {
  left: 0;
}

/* ---------- Breadcrumb ---------- */
.breadcrumb {
  padding: 14px 20px 0;
  font-size: 0.82rem;
  color: var(--ink-faint);
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.breadcrumb a { color: var(--ink-soft); font-weight: 500; }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .crumb-sep { opacity: 0.5; }
.breadcrumb span[aria-current] { color: var(--ink); font-weight: 600; }

/* ---------- Grouped nav dropdown legacy placeholder removed, see Top nav section for scalable implementation ---------- */

/* ---------- FAQ accordion ---------- */
.faq-block { margin-top: 34px; }
.faq-item {
  border-bottom: 1px solid var(--line);
}
.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 16px 4px;
  font-weight: 600;
  font-size: 0.98rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1.2rem;
  color: var(--ink-faint);
  flex: none;
}
.faq-item[open] summary::after { content: "\2212"; }
.faq-item p {
  padding: 0 4px 16px;
  margin: 0;
  font-size: 0.94rem;
}

.tick-rule {
  --tick-color: var(--line-strong);
  height: 14px;
  width: 100%;
  background-image:
    repeating-linear-gradient(
      to right,
      var(--tick-color) 0, var(--tick-color) 1px,
      transparent 1px, transparent 8px
    );
  background-size: 100% 100%;
  background-position: bottom;
  background-repeat: no-repeat;
  opacity: 0.9;
}
.tick-rule.major {
  background-image:
    repeating-linear-gradient(
      to right,
      var(--tick-color) 0, var(--tick-color) 1.5px,
      transparent 1.5px, transparent 40px
    );
  height: 20px;
}

/* ---------- Top nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(245,245,242,0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0;
}
.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
  color: var(--ink);
  white-space: nowrap;
}
.brand-mark {
  width: 26px; height: 26px;
  flex: none;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
}
.nav-links a {
  font-size: 0.92rem;
  color: var(--ink-soft);
  padding: 8px 10px;
  border-radius: var(--radius-s);
  font-weight: 500;
}
.nav-links a:hover { color: var(--ink); background: var(--surface-2); }
.nav-links a.active { color: var(--accent); background: var(--accent-tint); }

.nav-drop { position: relative; }
.nav-drop summary {
  list-style: none;
  cursor: pointer;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--ink-soft);
  padding: 8px 10px;
  border-radius: var(--radius-s);
  display: flex;
  align-items: center;
  gap: 6px;
  user-select: none;
}
.nav-drop summary::-webkit-details-marker { display: none; }
.nav-drop summary::after {
  content: "";
  width: 6px; height: 6px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg);
  margin-top: -3px;
  opacity: 0.6;
  flex: none;
  transition: transform .15s ease;
}
.nav-drop[open] summary::after { transform: rotate(-135deg); margin-top: 2px; }
.nav-drop:hover summary, .nav-drop[open] summary { color: var(--ink); background: var(--surface-2); }
.nav-drop-tag {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--brass);
  background: var(--brass-tint);
  padding: 2px 6px;
  border-radius: 100px;
}
.nav-drop-panel {
  display: flex;
  flex-direction: column;
  gap: 1px;
  min-width: 220px;
  padding: 8px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  box-shadow: var(--shadow-card);
}
.nav-drop-panel a {
  padding: 9px 10px;
  border-radius: var(--radius-s);
  font-size: 0.9rem;
  color: var(--ink-soft);
  line-height: 1.25;
  word-break: break-word;
}
.nav-drop-panel a:hover { background: var(--accent-tint); color: var(--accent); }
.nav-drop-panel a.active { color: var(--accent); font-weight: 600; background: var(--accent-tint); }
.nav-drop-panel a.is-hidden { display: none !important; }

/* Grouped nav dropdown sub-labels, scalable */
.nav-drop-group { display: flex; flex-direction: column; gap: 1px; min-width: 0; }
.nav-drop-group-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink-faint);
  padding: 12px 10px 4px;
  margin-bottom: 2px;
  border-bottom: 1px solid var(--line);
  background: var(--surface);
  position: sticky;
  top: 0;
  z-index: 1;
}
.nav-drop-group:first-child .nav-drop-group-label { padding-top: 6px; }
.nav-drop-group.is-empty { display: none !important; }

/* Search inside dropdown, sticky so it stays visible while scrolling */
.nav-drop-search-wrap {
  position: sticky;
  top: 0;
  z-index: 3;
  background: var(--surface);
  padding: 4px 0 8px;
  margin: -4px 0 6px;
  border-bottom: 1px solid var(--line);
}
.nav-drop-search {
  width: 100%;
  padding: 8px 10px 8px 32px;
  font-family: var(--font-body);
  font-size: 0.86rem;
  border: 1.5px solid var(--line-strong);
  border-radius: var(--radius-s);
  background: var(--paper);
  color: var(--ink);
}
.nav-drop-search:focus { outline: none; border-color: var(--accent); background: var(--surface); }
.nav-drop-search::placeholder { color: var(--ink-faint); }
.nav-drop-search-wrap::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  width: 14px; height: 14px;
  background: no-repeat center / 14px 14px url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%238A8F98' stroke-width='1.8' stroke-linecap='round'%3E%3Ccircle cx='11' cy='11' r='7'/%3E%3Cpath d='M21 21l-4.3-4.3'/%3E%3C/svg%3E");
  pointer-events: none;
  margin-top: -4px;
}
.nav-drop-empty {
  padding: 18px 10px;
  text-align: center;
  font-size: 0.88rem;
  color: var(--ink-faint);
  display: none;
  grid-column: 1 / -1;
}
.nav-drop-empty.visible { display: block; }
.nav-drop-count {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--ink-faint);
  padding: 4px 2px 2px;
  grid-column: 1 / -1;
}

/* Desktop: mega-menu with constrained height and grid, scales to 200+ items */
@media (min-width: 861px) {
  .nav-drop-panel {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    z-index: 50;
    max-height: min(68vh, 560px);
    overflow-y: auto;
    overflow-x: hidden;
    overscroll-behavior: contain;
    scrollbar-width: thin;
    scrollbar-color: var(--line-strong) transparent;
    max-width: min(92vw, 900px);
  }
  .nav-drop-panel::-webkit-scrollbar { width: 6px; height: 6px; }
  .nav-drop-panel::-webkit-scrollbar-thumb { background: var(--line-strong); border-radius: 999px; }
  .nav-drop-panel::-webkit-scrollbar-track { background: transparent; }
  /* Real units: single scrollable column */
  .nav-drop-panel:not(.wide) {
    min-width: 260px;
    max-width: 320px;
  }
  /* Fictional wide: grid mega-menu - 2 cols default, scales up with JS classes */
  .nav-drop-panel.wide {
    display: grid;
    grid-template-columns: repeat(2, minmax(200px, 1fr));
    align-content: start;
    align-items: start;
    gap: 8px 16px;
    min-width: min(680px, 88vw);
    padding: 12px;
  }
  .nav-drop-panel.wide .nav-drop-search-wrap {
    grid-column: 1 / -1;
    margin: -4px 0 2px;
    top: -12px;
    padding-top: 8px;
  }
  .nav-drop-panel.wide .nav-drop-group-label {
    top: 42px;
  }
  /* When JS detects many items, expand to 3 columns to keep height reasonable */
  .nav-drop-panel.wide.has-many {
    grid-template-columns: repeat(3, minmax(180px, 1fr));
    min-width: min(860px, 92vw);
  }
  /* Extra-wide on large screens when very many items (100+) */
  @media (min-width: 1200px) {
    .nav-drop-panel.wide.has-very-many {
      grid-template-columns: repeat(4, minmax(180px, 1fr));
      min-width: min(1020px, 94vw);
      left: 50%;
      transform: translateX(-42%);
    }
  }
  /* Per-group scaling: when a single group has many items, split it into columns */
  .nav-drop-group.has-many {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1px 10px;
    align-content: start;
  }
  .nav-drop-group.has-many .nav-drop-group-label { grid-column: 1 / -1; top: 42px; }
  .nav-drop-group.has-very-many {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  /* When a group is huge, span full panel width so internal columns have room */
  .nav-drop-panel.wide.has-many .nav-drop-group.has-many,
  .nav-drop-panel.wide.has-very-many .nav-drop-group.has-many {
    grid-column: 1 / -1;
  }
  .nav-drop-panel.wide.has-very-many .nav-drop-group.has-very-many {
    grid-column: 1 / -1;
  }
  /* Real units panel also becomes grid when it grows (future-proof for 100+ real units) */
  .nav-drop-panel.has-many:not(.wide) {
    display: grid;
    grid-template-columns: repeat(2, minmax(140px, 1fr));
    gap: 1px 10px;
    min-width: 460px;
    max-width: 560px;
    align-content: start;
  }
  .nav-drop-panel.has-many:not(.wide) .nav-drop-search-wrap { grid-column: 1 / -1; top: -8px; padding-top: 8px; }
  .nav-drop-panel.has-very-many:not(.wide) {
    grid-template-columns: repeat(3, minmax(140px, 1fr));
    min-width: 640px;
    max-width: 720px;
  }
  /* Prevent panel overflowing right edge: right-align last dropdown */
  .nav-drop:last-child .nav-drop-panel {
    left: auto;
    right: 0;
  }
  .nav-drop:last-child .nav-drop-panel.wide.has-very-many {
    left: auto;
    right: 0;
    transform: none;
  }
}

@media (max-width: 860px) {
  .nav-drop-panel a { padding: 10px 10px; }
  .nav-drop summary { font-size: 1rem; padding: 12px 10px; }
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px; height: 44px;
  border: 1px solid var(--line-strong);
  background: var(--surface);
  border-radius: var(--radius-s);
  cursor: pointer;
}
.nav-toggle svg { width: 18px; height: 18px; }

@media (max-width: 860px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    background: var(--surface);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: stretch;
    padding: 8px 20px 16px;
    gap: 2px;
    max-height: calc(100dvh - 60px);
    max-height: calc(100vh - 60px);
    overflow-y: auto;
    overscroll-behavior: contain;
    box-shadow: 0 12px 30px rgba(24,27,32,0.08);
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 14px 10px; font-size: 1rem; min-height: 44px; display: flex; align-items: center; }
  .nav-toggle { display: inline-flex; }
  .site-header { position: sticky; }
  /* Mobile dropdown panels: inner scroll with cap */
  .nav-drop-panel {
    border: none;
    box-shadow: none;
    padding: 0 0 6px 6px;
    background: transparent;
    gap: 6px;
  }
  .nav-drop-panel.wide {
    display: flex;
    flex-direction: column;
    min-width: 0;
    max-width: none;
    max-height: none;
    overflow: visible;
    padding: 0 0 4px 6px;
    gap: 8px;
  }
  .nav-drop-group { gap: 1px; }
  .nav-drop-group-label {
    position: static;
    border-bottom: 1px solid var(--line);
    margin-top: 4px;
    padding-top: 10px;
    background: transparent;
  }
  .nav-drop-search-wrap {
    position: sticky;
    top: 0;
    background: var(--surface);
    padding: 8px 0 8px;
    margin: 0 0 6px;
    z-index: 2;
  }
  .nav-drop-search-wrap::before { margin-top: 0; }
  /* When dropdown open on mobile, make its panel scrollable with cap */
  .nav-drop[open] .nav-drop-panel {
    max-height: min(50vh, 360px);
    overflow-y: auto;
    scrollbar-width: thin;
    border-left: 2px solid var(--line);
    margin-left: 4px;
    padding-left: 10px;
    background: var(--surface);
    border-radius: var(--radius-s);
    border: 1px solid var(--line);
    padding: 8px;
  }
  .nav-drop[open] .nav-drop-panel.wide {
    max-height: min(55vh, 420px);
  }
  .nav-drop[open] .nav-drop-panel.wide .nav-drop-group-label { top: 0; }
}

/* ---------- Hero ---------- */
.hero {
  padding-block: 56px 40px;
}
.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--brass);
  margin-bottom: 14px;
}
.hero h1 {
  font-size: clamp(2rem, 5.4vw, 3.4rem);
  max-width: 16ch;
  text-wrap: balance;
}
.hero .lede {
  font-size: 1.08rem;
  max-width: 52ch;
  margin-top: 10px;
}
@media (max-width: 640px) {
  .hero { padding-block: 32px 24px; }
  .hero h1 { font-size: clamp(1.8rem, 8vw, 2.4rem); }
}

/* ---------- Quick convert (hero widget) ---------- */
.quickbar {
  margin-top: 28px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-l);
  box-shadow: var(--shadow-card);
  padding: 18px;
}
.quickbar form {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto;
  gap: 10px;
  align-items: center;
}
.quickbar input[type="text"] {
  width: 100%;
}
.quickbar .go {
  white-space: nowrap;
}
@media (max-width: 640px) {
  .quickbar form { grid-template-columns: 1fr; }
  .quickbar .qb-op { justify-self: center; }
}

/* ---------- Search ---------- */
.search-wrap { position: relative; margin-top: 26px; max-width: 460px; }
.search-wrap input {
  width: 100%;
}
.search-wrap svg {
  position: absolute;
  left: 14px; top: 50%;
  transform: translateY(-50%);
  width: 16px; height: 16px;
  color: var(--ink-faint);
}
.search-wrap input { padding-left: 38px; }

/* ---------- Category grid ---------- */
.section { padding-block: 40px; }
/* Keep side padding from .container when combined: .section.container should be 40px 20px */
.section.container { padding: 40px 20px; }
.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
}
.section-head h2 { font-size: 1.4rem; }
.section-head .hint { font-size: 0.88rem; color: var(--ink-faint); font-family: var(--font-mono); }

.cat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 14px;
}
.cat-subgroup { margin-bottom: 26px; }
.cat-subgroup:last-child { margin-bottom: 0; }
.cat-subgroup-label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--fiction-dark);
  margin: 0 0 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.cat-subgroup-label::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line);
}
.cat-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  padding: 18px 18px 16px;
  transition: border-color .15s ease, transform .15s ease, box-shadow .15s ease;
}
.cat-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
}
.cat-card .pair {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--brass);
  letter-spacing: 0.02em;
  margin-bottom: 10px;
  display: inline-block;
  background: var(--brass-tint);
  padding: 3px 8px;
  border-radius: 100px;
}
.cat-card h3 { font-size: 1.08rem; margin-bottom: 4px; }
.cat-card p { font-size: 0.9rem; margin: 0; }
.cat-card .icon { width: 22px; height: 22px; color: var(--accent); margin-bottom: 10px; }

/* Fictional-unit distinction: violet accent instead of blueprint blue/brass */
.cat-card.fiction { border-color: var(--line); }
.cat-card.fiction:hover { border-color: var(--fiction); }
.cat-card.fiction .icon { color: var(--fiction); }
.cat-card.fiction .pair { color: var(--fiction-dark); background: var(--fiction-tint); }
.fiction-badge {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--fiction-dark);
  background: var(--fiction-tint);
  border: 1px solid rgba(107,79,187,0.25);
  padding: 3px 8px;
  border-radius: 100px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-bottom: 12px;
}
.fiction-badge svg { width: 11px; height: 11px; }
.tool.fiction { border-color: rgba(107,79,187,0.35); }
.tool.fiction .swap-btn { color: var(--fiction); }
.tool.fiction .swap-btn:hover { border-color: var(--fiction); background: var(--fiction-tint); }
.tool.fiction .field .value-input:focus { border-color: var(--fiction); }
.hero.fiction .hero-eyebrow { color: var(--fiction-dark); }

/* ---------- Converter tool ---------- */
.tool {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-l);
  box-shadow: var(--shadow-card);
  padding: 26px;
  margin-top: 20px;
}
.tool-grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 14px;
  align-items: end;
}
@media (max-width: 640px) {
  .tool-grid { grid-template-columns: 1fr; }
  .tool { padding: 18px; }
}

.field label {
  display: block;
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink-faint);
  margin-bottom: 8px;
}
.field .value-input {
  font-family: var(--font-mono);
  font-size: 1.7rem;
  width: 100%;
  padding: 12px 14px;
  border: 1.5px solid var(--line-strong);
  border-radius: var(--radius-m);
  background: var(--paper);
  color: var(--ink);
  font-weight: 500;
}
.field .value-input:focus { border-color: var(--accent); background: var(--surface); }
.field select.unit-select {
  width: 100%;
  margin-top: 8px;
  padding: 10px 12px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  border: 1.5px solid var(--line-strong);
  border-radius: var(--radius-m);
  background: var(--surface) url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="12" height="8"><path d="M1 1l5 5 5-5" stroke="%23565C66" stroke-width="1.6" fill="none" stroke-linecap="round" stroke-linejoin="round"/></svg>') no-repeat right 12px center;
  appearance: none;
  -webkit-appearance: none;
  color: var(--ink);
}

.swap-btn {
  width: 46px; height: 46px;
  border-radius: 50%;
  border: 1.5px solid var(--line-strong);
  background: var(--surface);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--accent);
  transition: transform .18s ease, border-color .15s ease, background .15s ease;
  margin: 0 auto;
}
.swap-btn:hover { border-color: var(--accent); background: var(--accent-tint); }
.swap-btn.spin { transform: rotate(180deg); }
.swap-btn svg { width: 20px; height: 20px; }
@media (max-width: 640px) {
  .swap-btn { transform: rotate(90deg); }
  .swap-btn.spin { transform: rotate(270deg); }
}

.tool-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px dashed var(--line);
  flex-wrap: wrap;
  gap: 10px;
}
.result-line {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--ink-soft);
}
.result-line strong { color: var(--ink); }

.tool-foot-actions { display: flex; gap: 8px; flex-wrap: wrap; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 14px;
  border-radius: var(--radius-s);
  border: 1px solid var(--line-strong);
  background: var(--surface);
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
}
.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn svg { width: 14px; height: 14px; }
.btn.copied { color: var(--good); border-color: var(--good); }

/* ---------- Reference table ---------- */
.ref-table-wrap {
  margin-top: 34px;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: var(--surface);
}
table.ref-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  min-width: 420px;
}
.ref-table th, .ref-table td {
  text-align: left;
  padding: 11px 16px;
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}
.ref-table th {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink-faint);
  background: var(--surface-2);
}
.ref-table td:last-child, .ref-table th:last-child { font-family: var(--font-mono); }
.ref-table tr:last-child td { border-bottom: none; }

/* ---------- Related / chips ---------- */
.chip-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.chip {
  font-size: 0.85rem;
  padding: 7px 12px;
  border-radius: 100px;
  border: 1px solid var(--line-strong);
  background: var(--surface);
  color: var(--ink-soft);
  font-weight: 500;
}
.chip:hover { border-color: var(--accent); color: var(--accent); }
.chip.chip-active {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--surface);
}
.filter-row { display: flex; gap: 8px; margin: 22px 0 4px; flex-wrap: wrap; }

/* ---------- Content blocks (SEO copy) ---------- */
.prose { max-width: 68ch; }
.prose h2 { font-size: 1.25rem; margin-top: 1.4em; line-height: 1.2; }
.prose h2:first-child { margin-top: 0; }
.prose p { overflow-wrap: break-word; }
.prose ul { color: var(--ink-soft); padding-left: 1.2em; }
.prose li { margin-bottom: 0.4em; }
@media (max-width: 640px) {
  .prose { padding-inline: 2px; }
  .prose h2 { font-size: 1.15rem; }
  .prose p, .prose li { font-size: 0.95rem; line-height: 1.6; }
}

/* ---------- Footer, scalable for 100-200+ links ---------- */
.site-footer {
  border-top: 1px solid var(--line);
  margin-top: 60px;
  padding: 40px 0 30px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2.2fr 1fr 0.9fr;
  gap: 26px;
  align-items: start;
}
@media (max-width: 980px) {
  .footer-grid { grid-template-columns: 1.8fr 1fr 0.9fr; }
}
@media (max-width: 760px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
.footer-col h4 {
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-faint);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.footer-col h4 .count {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.68rem;
  background: var(--surface-2);
  color: var(--ink-faint);
  padding: 2px 6px;
  border-radius: 100px;
  letter-spacing: 0.02em;
  text-transform: none;
}
.footer-col a {
  display: block;
  font-size: 0.92rem;
  color: var(--ink-soft);
  padding: 5px 0;
  word-break: break-word;
}
.footer-col a:hover { color: var(--accent); }
/* Scrollable container for many links, keeps footer height sane at 200+ items */
.footer-col-links {
  display: flex;
  flex-direction: column;
  gap: 1px;
  max-height: none;
  overflow-y: visible;
  overflow-x: hidden;
  scrollbar-width: thin;
  scrollbar-color: var(--line-strong) transparent;
  padding-right: 6px;
  margin-right: -6px;
}
.footer-col-links::-webkit-scrollbar { width: 5px; }
.footer-col-links::-webkit-scrollbar-thumb { background: var(--line-strong); border-radius: 999px; }
.footer-col-links::-webkit-scrollbar-track { background: transparent; }
.footer-col-links a { padding: 5px 6px; border-radius: var(--radius-s); margin: 0 -6px; }
.footer-col-links a:hover { background: var(--surface-2); }
/* Only cap height when many items, 19 items show fully, 200+ becomes scrollable */
.footer-col.has-many .footer-col-links,
.footer-col--fictional.has-many .footer-col-links {
  max-height: 380px;
  overflow-y: auto;
}
.footer-col.has-very-many .footer-col-links,
.footer-col--fictional.has-very-many .footer-col-links {
  max-height: 420px;
}
@media (min-width: 901px) {
  .footer-col.has-many .footer-col-links,
  .footer-col--fictional.has-many .footer-col-links {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-content: start;
    gap: 1px 10px;
  }
}
@media (min-width: 1100px) {
  .footer-col--fictional.has-very-many .footer-col-links {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .footer-col.has-very-many .footer-col-links {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}
@media (max-width: 760px) {
  .footer-col.has-many .footer-col-links,
  .footer-col--fictional.has-many .footer-col-links { max-height: 320px; }
}
.footer-bottom {
  margin-top: 30px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 0.82rem;
  color: var(--ink-faint);
  font-family: var(--font-mono);
}

/* ---------- Utility ---------- */
.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap;
}
.flash {
  animation: flash-bg 0.5s ease;
}
@keyframes flash-bg {
  0% { background: var(--accent-tint); }
  100% { background: var(--paper); }
}