/* Base */
:root { padding-top: env(safe-area-inset-top, 0px); padding-bottom: env(safe-area-inset-bottom, 0px); }
body { margin: 0; }
img { max-width: 100%; }
[hidden] { display: none !important; }

/* Layout: a working dictionary. Headword column + definition column, filter bar sticky on top. */
/* Dark-first: dark palette is the default; light applies only when the visitor picks it. */
:root {
  --bg: #11131A;
  --surface: #181B24;
  --ink: #E8EAF1;
  --muted: #9AA1B3;
  --rule: #2A2E3B;
  --accent: #9AACFF;
  --accent-soft: #232A4A;
  --new: #5FD3AE;
  --new-soft: #17362D;
  --bad: #FF8F86;
  --bad-soft: #3B1E22;
  --f-display: "Instrument Serif", "Iowan Old Style", Georgia, serif;
  --f-body: "Public Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --f-mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;
  color-scheme: dark;
}
:root[data-theme="light"] {
  --bg: #F5F6F9; --surface: #FFFFFF; --ink: #14171F; --muted: #5B6273; --rule: #DDE0E8;
  --accent: #2D47C9; --accent-soft: #E4E8FA; --new: #0E7A5F; --new-soft: #DDF2EA; --bad: #B42318; --bad-soft: #FCE7E5; color-scheme: light;
}
* { box-sizing: border-box; }
body {
  background: var(--bg); color: var(--ink);
  font-family: var(--f-body); font-size: 16px; line-height: 1.55;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
}
body::before { content: ""; position: fixed; inset: 0 0 auto; height: env(safe-area-inset-top, 0px); z-index: 10; background: var(--bg); }
.wrap { max-width: 980px; margin: 0 auto; }

header.masthead { padding-block: 56px 40px; display: grid; gap: 18px; }
.toprow { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.themebtn {
  display: inline-flex; align-items: center; gap: 8px; cursor: pointer;
  font: 500 13px var(--f-body); color: var(--ink); background: var(--surface);
  border: 1px solid var(--rule); border-radius: 999px; padding: 6px 12px;
}
.themebtn:hover { border-color: var(--accent); }
.themebtn svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; }
.eyebrow { font-family: var(--f-mono); font-size: 12px; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
h1 { font-family: var(--f-display); font-weight: 400; font-size: clamp(44px, 8vw, 84px); line-height: .95; margin: 0; text-wrap: balance; letter-spacing: -.01em; }
h1 em { color: var(--accent); }
.lede { max-width: 62ch; color: var(--muted); margin: 0; font-size: 17px; }

.controls {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 5;
  background: var(--bg); padding-block: 14px 12px; border-bottom: 1px solid transparent;
  display: grid; gap: 12px; transition: border-color .15s;
}
.controls.stuck { border-bottom-color: var(--rule); }
.searchrow { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
#q {
  flex: 1 1 260px; min-width: 0; font: inherit; font-size: 16px; color: var(--ink);
  background: var(--surface); border: 1px solid var(--rule); border-radius: 8px; padding: 10px 14px;
}
#q:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.listtools { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; justify-content: space-between; padding-block: 4px 0; }
.count { font-family: var(--f-mono); font-size: 13px; color: var(--muted); font-variant-numeric: tabular-nums; white-space: nowrap; }
.feature {
  display: grid; grid-template-columns: minmax(0, 15rem) minmax(0, 1fr); gap: 10px 32px;
  background: var(--surface); border: 1px solid var(--rule); border-radius: 14px;
  padding: 26px 24px; margin-bottom: 24px;
}
.feature-head { display: grid; gap: 8px; align-content: start; min-width: 0; }
.feature-hw { font-weight: 400; margin: 0; font-size: clamp(32px, 4vw, 40px); }
.feature-head .pos { font-size: 18px; }
.feature-body { display: grid; gap: 10px; min-width: 0; }
.feature-body p { margin: 0; max-width: 64ch; }
.abbr { font-family: var(--f-mono); font-size: 12px; padding: 2px 7px; border-radius: 4px; background: var(--accent-soft); color: var(--accent); font-style: normal; }
@media (max-width: 640px) { .feature { grid-template-columns: minmax(0, 1fr); padding: 20px; } }

dl.lex { margin: 0; padding-block: 12px 56px; }
.entry { display: grid; grid-template-columns: minmax(0, 15rem) minmax(0, 1fr); gap: 8px 32px; padding-block: 22px; border-bottom: 1px solid var(--rule); }
.entry dt { display: grid; gap: 6px; align-content: start; }
.hw { font-family: var(--f-display); font-size: 30px; line-height: 1.05; text-wrap: balance; }
a.hw { color: inherit; text-decoration: none; justify-self: start; }
a.hw:hover { color: var(--accent); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 4px; }
a.hw:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 3px; }
.meta { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; font-family: var(--f-mono); font-size: 12px; color: var(--muted); }
.pos { font-style: italic; font-family: var(--f-display); font-size: 16px; color: var(--muted); }
.tag { padding: 2px 7px; border-radius: 4px; background: var(--accent-soft); color: var(--accent); }
.tag.yr { background: transparent; border: 1px solid var(--rule); color: var(--muted); }
.tag.fresh { background: var(--new-soft); color: var(--new); }
.entry dd { margin: 0; min-width: 0; display: grid; gap: 8px; }
.entry dd p { margin: 0; max-width: 64ch; }
.ex { color: var(--muted); font-style: italic; }
.see { font-size: 14px; color: var(--muted); }
.see button { font: inherit; color: var(--accent); background: none; border: 0; padding: 0; cursor: pointer; text-decoration: underline; text-underline-offset: 3px; }
.empty { padding-block: 48px; color: var(--muted); text-align: center; }

footer { padding-block: 40px 72px; color: var(--muted); font-size: 14px; display: grid; gap: 10px; }
footer h2 { font-family: var(--f-display); font-weight: 400; font-size: 24px; color: var(--ink); margin: 0; }
footer ul { margin: 0; padding-left: 18px; display: grid; gap: 4px; }
footer a { color: var(--accent); }

@media (max-width: 640px) {
  .entry { grid-template-columns: minmax(0, 1fr); gap: 10px; }
  .hw { font-size: 28px; }
  header.masthead { padding-block: 36px 28px; }
}
@media (prefers-reduced-motion: no-preference) {
  .entry { transition: background .15s; }
}

/* Header links shared by both pages */
.toplinks { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.navlink {
  display: inline-flex; align-items: center; gap: 6px; text-decoration: none;
  font: 500 13px var(--f-body); color: var(--accent);
  border: 1px solid var(--accent); border-radius: 999px; padding: 6px 12px;
}
.navlink:hover { background: var(--accent-soft); }
.navlink:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.entry { scroll-margin-top: var(--anchor-offset, 0px); }
.entry.flash { animation: flash 1.6s ease-out; }
@keyframes flash { from { background: var(--accent-soft); } to { background: transparent; } }
@media (prefers-reduced-motion: reduce) { .entry.flash { animation: none; } }

/* Quiz page */
.quizhead { padding-block: 56px 40px; }
.backlink { font: 500 14px var(--f-body); color: var(--accent); text-decoration: none; }
.backlink:hover { text-decoration: underline; text-underline-offset: 3px; }
.backlink:focus-visible, .qentry:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }
#quiz { display: grid; gap: 16px; padding-bottom: 72px; scroll-margin-top: 16px; }
.qprogress { height: 4px; background: var(--rule); border-radius: 999px; overflow: hidden; }
.qbar { height: 100%; width: 0; background: var(--accent); border-radius: 999px; transition: width .3s ease; }
.qmeta { display: flex; justify-content: space-between; gap: 12px; font-family: var(--f-mono); font-size: 13px; color: var(--muted); font-variant-numeric: tabular-nums; }
.qcard, .qresults {
  display: grid; gap: 16px; background: var(--surface); border: 1px solid var(--rule);
  border-radius: 14px; padding: 26px 24px; scroll-margin-top: 16px;
}
.qprompt { font-family: var(--f-display); font-weight: 400; font-size: clamp(24px, 4vw, 30px); line-height: 1.2; margin: 0; text-wrap: pretty; }
.qblank { color: var(--accent); letter-spacing: .05em; }
.qchoices { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.qchoices.long { grid-template-columns: minmax(0, 1fr); }
.qchoice {
  display: flex; align-items: center; gap: 12px; text-align: left; min-width: 0;
  font: 500 16px/1.35 var(--f-body); color: var(--ink); background: var(--bg);
  border: 1px solid var(--rule); border-radius: 10px; padding: 12px 14px; cursor: pointer;
  transition: border-color .15s, background .15s;
}
.qchoice:hover:not(:disabled) { border-color: var(--accent); }
.qchoice:focus-visible, .qnext:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.qchoice:disabled { cursor: default; }
.qletter {
  flex: none; display: grid; place-items: center; width: 26px; height: 26px; border-radius: 6px;
  font: 500 12px var(--f-mono); color: var(--muted); border: 1px solid var(--rule);
}
.qchoice.right { border-color: var(--new); background: var(--new-soft); }
.qchoice.right .qletter { background: var(--new); border-color: var(--new); color: var(--bg); }
.qchoice.wrong { border-color: var(--bad); background: var(--bad-soft); }
.qchoice.wrong .qletter { background: var(--bad); border-color: var(--bad); color: var(--bg); }
.qchoice.dim { opacity: .55; }
.qfeedback { display: grid; gap: 10px; padding-top: 16px; border-top: 1px solid var(--rule); }
.qfeedback p, .qresults p { margin: 0; max-width: 62ch; }
.qverdict { font-weight: 600; }
.qverdict.ok { color: var(--new); }
.qverdict.no { color: var(--bad); }
.qactions { display: flex; flex-wrap: wrap; gap: 12px 20px; align-items: center; justify-content: space-between; padding-top: 4px; }
.qentry { color: var(--accent); font-size: 15px; text-underline-offset: 3px; }
.qnext {
  font: 600 15px var(--f-body); color: var(--bg); background: var(--accent);
  border: 0; border-radius: 999px; padding: 10px 20px; cursor: pointer;
}
.qnext:hover { filter: brightness(1.08); }
.qfinal { font-family: var(--f-display); font-size: clamp(72px, 14vw, 112px); line-height: .9; font-variant-numeric: tabular-nums; }
.qof { color: var(--muted); font-size: .45em; margin-left: 4px; }
.qtitle { font-family: var(--f-display); font-size: 32px; line-height: 1.1; color: var(--accent); }
.qsummary { font-size: 17px; }
.qbest { font-family: var(--f-mono); font-size: 13px; color: var(--muted); }
.qmissed { display: grid; gap: 8px; }
.qmissed h3 { margin: 0; font: 600 13px var(--f-mono); text-transform: uppercase; letter-spacing: .08em; color: var(--muted); }
.qmissed ul { margin: 0; padding: 0; list-style: none; display: flex; flex-wrap: wrap; gap: 8px; }
.qmissed a {
  display: inline-block; font: 500 14px var(--f-body); color: var(--ink); text-decoration: none;
  border: 1px solid var(--rule); border-radius: 999px; padding: 5px 12px;
}
.qmissed a:hover { border-color: var(--accent); color: var(--accent); }
@media (max-width: 560px) {
  .qchoices { grid-template-columns: minmax(0, 1fr); }
  .qcard, .qresults { padding: 20px 16px; }
}
@media (prefers-reduced-motion: reduce) { .qbar, .qchoice { transition: none; } }

/* Glossary header: title and intro on the left, quiz call-to-action on the right */
.mast-main { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 20px 40px; align-items: center; }
.mast-text { display: grid; gap: 14px; min-width: 0; }
.quizcta {
  display: grid; gap: 2px; text-decoration: none; text-align: left;
  background: var(--accent); color: var(--bg);
  border-radius: 999px; padding: 11px 26px 12px; text-align: center;
  transition: transform .15s ease, filter .15s ease;
}
.quizcta:hover { filter: brightness(1.08); transform: translateY(-1px); }
.quizcta:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.quizcta-label { font: 400 24px/1.1 var(--f-display); white-space: nowrap; }
.mast-ctas { display: grid; gap: 10px; }
.quizcta.ghost { background: transparent; color: var(--accent); box-shadow: inset 0 0 0 1px var(--accent); }
.quizcta.ghost:hover { background: var(--accent-soft); filter: none; }
@media (max-width: 720px) {
  .mast-main { grid-template-columns: minmax(0, 1fr); }
  .mast-ctas { display: flex; flex-wrap: wrap; gap: 10px; }
}
@media (prefers-reduced-motion: reduce) { .quizcta { transition: none; } .quizcta:hover { transform: none; } }

/* Homepage title doubles as a reset-to-all link */
.homelink { color: inherit; text-decoration: none; }
.homelink:hover em { text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: 8px; }
.homelink:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; border-radius: 6px; }

/* Sort control in the search row */
.sortctl { display: inline-flex; align-items: center; gap: 8px; font: 500 12px var(--f-mono); letter-spacing: .06em; text-transform: uppercase; color: var(--muted); }
.sortctl select {
  font: 500 14px var(--f-body); letter-spacing: 0; text-transform: none; color: var(--ink);
  background: var(--surface); border: 1px solid var(--rule); border-radius: 8px;
  padding: 9px 30px 9px 12px; cursor: pointer; appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%), linear-gradient(135deg, var(--muted) 50%, transparent 50%);
  background-position: calc(100% - 16px) 50%, calc(100% - 11px) 50%;
  background-size: 5px 5px; background-repeat: no-repeat;
}
.sortctl select:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.sortctl select:disabled { opacity: .5; cursor: not-allowed; }

/* Timeline page: one continuous line; era labels stick in a side column on desktop */
.eranav {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 5; background: var(--bg);
  display: flex; flex-wrap: wrap; gap: 8px; padding-block: 12px; border-bottom: 1px solid var(--rule);
}
.eranav a {
  flex: none; text-decoration: none; font: 500 13px var(--f-body); color: var(--ink);
  border: 1px solid var(--rule); border-radius: 999px; padding: 6px 12px; transition: background .15s, color .15s, border-color .15s;
}
.eranav a:hover { border-color: var(--accent); }
.eranav a[aria-current="true"] { background: var(--accent); border-color: var(--accent); color: var(--bg); }
.eranav a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.tl { padding-block: 40px 8px; position: relative; }
.tl-fill { position: absolute; width: 2px; height: 0; background: var(--accent); pointer-events: none; z-index: 0; }
.m::before, .era-head::before { z-index: 1; }
.m.passed::before { background: var(--accent); }
.tick { position: relative; height: 16px; margin: -12px 0 24px; }
.tick::before { content: ""; position: absolute; left: -38px; top: 7px; width: 14px; height: 2px; background: var(--rule); z-index: 1; }
.tick span { font: 500 11px var(--f-mono); letter-spacing: .06em; color: var(--muted); opacity: .8; font-variant-numeric: tabular-nums; }
.era { display: grid; grid-template-columns: minmax(0, 15rem) minmax(0, 1fr); gap: 0 40px; scroll-margin-top: calc(var(--eranav-h, 60px) + 8px); }
.era-head {
  position: sticky; top: calc(var(--eranav-h, 60px) + 24px); align-self: start;
  display: grid; gap: 8px; padding-bottom: 40px;
}
.era-years { font: 500 13px var(--f-mono); letter-spacing: .06em; color: var(--accent); font-variant-numeric: tabular-nums; }
.era-head h2 { font: 400 clamp(30px, 3.4vw, 38px)/1.02 var(--f-display); margin: 0; text-wrap: balance; }
.era-intro { margin: 0; color: var(--muted); font-size: 15px; line-height: 1.5; }
.era-words { display: grid; gap: 8px; margin-top: 8px; }
.era-words-label { font: 500 11px var(--f-mono); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.era-words-list { display: flex; flex-wrap: wrap; gap: 5px; }
.era-words-list .tl-term { font-size: 12px; padding: 2px 8px; }
.era-words-more { font: 500 12px var(--f-body); color: var(--accent); background: none; border: 0; padding: 2px 4px; cursor: pointer; text-decoration: underline; text-underline-offset: 3px; }
.era-words-more:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
.era-words-list .tl-term.extra { display: none; }
.era-words-list.open .tl-term.extra { display: inline-block; }
.era-head { max-height: calc(100vh - var(--eranav-h, 60px) - 48px); overflow-y: auto; scrollbar-width: none; }
.ms { list-style: none; margin: 0; padding: 0 0 0 30px; border-left: 2px solid var(--rule); display: grid; }
.m { position: relative; display: grid; gap: 6px; padding-bottom: 36px; min-width: 0; }
.m::before {
  content: ""; position: absolute; left: -38px; top: 3px; width: 12px; height: 12px; border-radius: 50%;
  background: var(--bg); border: 2px solid var(--accent);
}
.m.m-first::before { left: -41px; top: 0; width: 18px; height: 18px; background: var(--accent); box-shadow: 0 0 0 4px var(--bg); }
.m-date { font: 500 13px var(--f-mono); color: var(--muted); font-variant-numeric: tabular-nums; }
.m-top { display: flex; flex-wrap: wrap; gap: 6px 12px; align-items: baseline; }
.m-top h3 { margin: 0; font: 400 26px/1.15 var(--f-display); text-wrap: balance; }
.m-desc { margin: 0; max-width: 64ch; }
.m-kind { font: 500 11px var(--f-mono); letter-spacing: .06em; text-transform: uppercase; padding: 2px 7px; border-radius: 4px; border: 1px solid var(--rule); color: var(--muted); }
.m-kind.k-research { color: var(--accent); border-color: var(--accent-soft); background: var(--accent-soft); }
.m-kind.k-product { color: var(--new); border-color: var(--new-soft); background: var(--new-soft); }
.m-terms, .era-words-list { margin: 0; }
.m-terms { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 2px; }
.tl-term {
  font: 500 13px var(--f-body); color: var(--ink); text-decoration: none;
  border: 1px solid var(--rule); border-radius: 999px; padding: 3px 10px;
}
.tl-term:hover { border-color: var(--accent); color: var(--accent); }
.tl-term:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.tl-now { display: grid; grid-template-columns: minmax(0, 15rem) minmax(0, 1fr); gap: 0 40px; padding-bottom: 24px; }
.tl-now span {
  grid-column: 2; justify-self: start; margin-left: -13px; position: relative;
  font: 500 12px var(--f-mono); letter-spacing: .08em; text-transform: uppercase; color: var(--bg);
  background: var(--accent); border-radius: 999px; padding: 4px 10px;
}
@media (max-width: 760px) {
  .eranav { flex-wrap: nowrap; overflow-x: auto; scrollbar-width: none; }
  .eranav::-webkit-scrollbar { display: none; }
  .era, .tl-now { grid-template-columns: minmax(0, 1fr); }
  /* On phones the era label becomes a marker on the line itself */
  .era-head {
    position: relative; top: auto; display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 10px;
    max-height: none; overflow: visible;
    padding: 0 0 28px 30px; border-left: 2px solid var(--rule); margin: 0;
  }
  .era:first-child .era-head { border-left-color: transparent; }
  .era-head h2 { font-size: 26px; order: 2; }
  .era-years { order: 1; }
  .era-intro, .era-words { display: none; }
  .ms { padding-bottom: 0; }
  .m.m-first::before { display: none; }
  .era-head::before {
    content: ""; position: absolute; left: -10px; top: 6px; width: 18px; height: 18px; border-radius: 50%;
    background: var(--accent); box-shadow: 0 0 0 4px var(--bg);
  }
  .tl-now span { grid-column: 1; margin-left: -13px; }
  .m-top h3 { font-size: 23px; }
}
@media (prefers-reduced-motion: reduce) { .eranav a { transition: none; } }

.textlink { font: 500 14px var(--f-body); color: var(--ink); text-decoration: none; padding: 6px 4px; }
.textlink:hover { color: var(--accent); text-decoration: underline; text-underline-offset: 4px; }
.textlink:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }

/* Homepage groups: Essentials, then Extended */
.group { scroll-margin-top: calc(var(--anchor-offset, 90px)); }
.group + .group { margin-top: 32px; }
.group-head {
  display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 4px 16px; align-items: baseline;
  padding-block: 28px 14px; border-bottom: 1px solid var(--rule);
}
.group-head h2 { margin: 0; font: 400 clamp(34px, 5vw, 46px)/1 var(--f-display); grid-column: 1; }
.group-head p { margin: 0; grid-column: 1; color: var(--muted); max-width: 62ch; }
.group-count { grid-column: 2; grid-row: 1; font: 500 13px var(--f-mono); color: var(--muted); font-variant-numeric: tabular-nums; white-space: nowrap; }
.group .lex { padding-block: 0 24px; }

/* Homepage footer: same buttons as the hero, side by side */
.footer-ctas { display: grid; gap: 14px; padding-bottom: 28px; margin-bottom: 8px; border-bottom: 1px solid var(--rule); }
.footer-ctas-lead { margin: 0; font: 400 28px/1.1 var(--f-display); color: var(--ink); }
.mast-ctas.row { display: flex; flex-wrap: wrap; gap: 10px; }

/* Quiz mode picker */
.qmodes { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; padding-bottom: 72px; }
.qmode {
  display: grid; gap: 10px; align-content: start; text-decoration: none; color: var(--ink);
  background: var(--surface); border: 1px solid var(--rule); border-radius: 14px; padding: 24px;
  transition: border-color .15s, transform .15s;
}
.qmode:hover { border-color: var(--accent); transform: translateY(-2px); }
.qmode:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.qmode-name { font: 400 clamp(32px, 4vw, 40px)/1 var(--f-display); }
.qmode-desc { color: var(--muted); max-width: 46ch; }
.qmode-best { font: 500 12px var(--f-mono); letter-spacing: .06em; text-transform: uppercase; color: var(--new); }
.qmode-go { margin-top: 6px; font: 600 15px var(--f-body); color: var(--accent); }
@media (max-width: 640px) { .qmodes { grid-template-columns: minmax(0, 1fr); } }
@media (prefers-reduced-motion: reduce) { .qmode { transition: none; } .qmode:hover { transform: none; } }

/* Quiz results: Advanced invitation after Beginner, and a ghost button */
.qup { display: grid; gap: 12px; justify-items: start; padding: 18px; border-radius: 12px; background: var(--accent-soft); }
.qup p { margin: 0; }
.qnext.qghost { background: transparent; color: var(--accent); box-shadow: inset 0 0 0 1px var(--accent); }
.qnext.qghost:hover { background: var(--accent-soft); filter: none; }
a.qnext { text-decoration: none; display: inline-block; }

/* Shown when /data files fail to load */
.loaderr { margin: 0 0 24px; padding: 14px 16px; border: 1px solid var(--bad); border-radius: 10px; color: var(--ink); background: var(--bad-soft); }

/* Byline: deliberately quiet, at the very bottom of every page */
.byline { margin: 28px 0 0; font-size: 13px; color: var(--muted); opacity: .8; }
.byline a { color: inherit; text-decoration: underline; text-decoration-color: var(--rule); text-underline-offset: 3px; }
.byline a:hover { color: var(--accent); text-decoration-color: currentColor; }
.byline a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 3px; }
.sitefoot { padding-block: 0 48px; }
.sitefoot .byline { margin-top: 0; }

/* Background art: pinned to the bottom right of the screen, scaled to cover it.
   Fixed to the viewport (not the page) so tall pages don't blow it up. Dark theme only. */
body::after {
  content: ""; position: fixed; inset: 0; z-index: -1; pointer-events: none;
  /* An even 55% dim keeps the glow quiet behind the text. */
  background:
    linear-gradient(color-mix(in srgb, var(--bg) 55%, transparent), color-mix(in srgb, var(--bg) 55%, transparent)),
    url("/bg.jpg") right bottom / cover no-repeat;
}
@media (max-width: 760px) {
  /* On phones the text covers the whole screen, so the glow is toned down */
  body::after {
    background:
      linear-gradient(color-mix(in srgb, var(--bg) 70%, transparent), color-mix(in srgb, var(--bg) 70%, transparent)),
      url("/bg.jpg") right bottom / cover no-repeat;
  }
}
:root[data-theme="light"] body::after { display: none; }
/* Sticky bars let the art show through softly instead of cutting a solid band across it */
:root:not([data-theme="light"]) .controls,
:root:not([data-theme="light"]) .eranav {
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
}
@media (max-width: 760px) {
  /* Phones: a solid backing instead of blur, which flickers on iOS over a fixed background */
  :root:not([data-theme="light"]) .controls,
  :root:not([data-theme="light"]) .eranav {
    background: var(--bg);
    -webkit-backdrop-filter: none; backdrop-filter: none;
  }
}

/* Full / Compact view switch */
.viewtoggle { display: inline-flex; border: 1px solid var(--rule); border-radius: 999px; padding: 2px; background: var(--surface); margin-right: auto; }
.viewtoggle button {
  font: 500 13px var(--f-body); color: var(--muted); background: transparent; border: 0;
  border-radius: 999px; padding: 5px 12px; cursor: pointer;
}
.viewtoggle button[aria-pressed="true"] { background: var(--ink); color: var(--bg); }
.viewtoggle button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.listtools .sortctl { order: 0; }
.listtools .viewtoggle { order: 1; }
.listtools .count { order: 2; }

/* Compact entries: a single tappable heading line; the body opens below it */
.entry.compact { grid-template-columns: minmax(0, 1fr); gap: 0; padding-block: 0; }
.entry.compact dt { display: block; }
.entry-head {
  width: 100%; display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 14px; text-align: left;
  background: none; border: 0; color: inherit; font: inherit; cursor: pointer; padding: 16px 32px 16px 0; position: relative;
}
.entry-head .hw { font-size: 26px; }
.entry-head:hover .hw { color: var(--accent); }
.entry-head:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 6px; }
.chev {
  position: absolute; right: 6px; top: 50%; width: 9px; height: 9px; margin-top: -7px;
  border-right: 2px solid var(--muted); border-bottom: 2px solid var(--muted); transform: rotate(45deg); transition: transform .15s;
}
.entry.compact.open .chev { transform: rotate(-135deg); margin-top: -2px; }
.entry.compact dd { padding: 0 0 20px; }
@media (prefers-reduced-motion: reduce) { .chev { transition: none; } }

/* Link from each glossary entry to its own term page */

/* Term pages: /terms/<slug> */
.termwrap { max-width: 760px; }
.termpage { display: grid; gap: 18px; padding-bottom: 56px; }
.crumbs { font: 500 12px var(--f-mono); letter-spacing: .06em; text-transform: uppercase; color: var(--muted); }
.crumbs a { color: inherit; text-decoration: none; }
.crumbs a:hover { color: var(--accent); }
.term-h1 { font: 400 clamp(48px, 9vw, 84px)/.95 var(--f-display); margin: 0; letter-spacing: -.01em; text-wrap: balance; }
.term-meta .meta { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.term-def { margin: 6px 0 0; font-size: 21px; line-height: 1.5; max-width: 60ch; }
.term-ex { margin: 0; font-style: italic; color: var(--muted); font-size: 18px; max-width: 60ch; }
.term-sec { display: grid; gap: 10px; padding-top: 22px; border-top: 1px solid var(--rule); margin-top: 8px; }
.term-sec h2 { margin: 0; font: 500 12px var(--f-mono); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.term-sec p { margin: 0; max-width: 62ch; }
.term-links { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.term-links a {
  display: inline-block; font: 500 14px var(--f-body); color: var(--ink); text-decoration: none;
  border: 1px solid var(--rule); border-radius: 999px; padding: 5px 12px;
}
.term-links a:hover { border-color: var(--accent); color: var(--accent); }
.term-history { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.term-history a { color: var(--ink); text-decoration: none; }
.term-history a:hover { color: var(--accent); }
.th-year { font: 500 13px var(--f-mono); color: var(--muted); margin-right: 8px; font-variant-numeric: tabular-nums; }
.term-where .mast-ctas { margin-top: 6px; }
.term-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; padding-top: 22px; border-top: 1px solid var(--rule); margin-top: 8px; }
.term-nav a {
  display: grid; gap: 2px; text-decoration: none; color: var(--ink); font: 400 22px/1.15 var(--f-display);
  background: var(--surface); border: 1px solid var(--rule); border-radius: 12px; padding: 12px 16px;
}
.term-nav a[rel="next"] { text-align: right; }
.term-nav a:hover { border-color: var(--accent); }
.term-nav span { font: 500 11px var(--f-mono); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.term-links a:focus-visible, .term-history a:focus-visible, .term-nav a:focus-visible, .crumbs a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 6px; }