/* london-endings: vellum and ink. Light + dark via [data-theme]. */
:root {
  --paper: #faf6ee;
  --paper-2: #f3ecdc;
  --ink: #211d16;
  --ink-soft: #4d4638;
  --muted: #544e3e;
  --line: #ddd2bd;
  --accent: #8a2f1b;
  --accent-ink: #fff8ef;
  --chip: #efe6d2;
  --card: #fffdf7;
  --good: #175c30;
  --bad: #a01c1c;
  --focus: #1a4fd6;
  --celtic: #19567f;
  --roman: #6f1f10;
  --saxon: #3d5a18;
  --norman: #6a3d9a;
  --modern: #4d5a66;
  --open: #544e3e;
  --shadow: 0 1px 2px rgba(33, 29, 22, 0.12), 0 4px 18px rgba(33, 29, 22, 0.08);
  --radius: 10px;
  --measure: 42rem;
  --bar-h: 44px;
}
[data-theme="dark"] {
  --paper: #17140f;
  --paper-2: #211c14;
  --ink: #f0e9da;
  --ink-soft: #d3c9b4;
  --muted: #b2a891;
  --line: #3a332a;
  --accent: #f0936f;
  --accent-ink: #1c0f0a;
  --chip: #2a2419;
  --card: #201b13;
  --good: #7fd79a;
  --bad: #f08a8a;
  --focus: #9db9ff;
  --celtic: #7fb8e0;
  --roman: #f0936f;
  --saxon: #a9c96a;
  --norman: #c09ff0;
  --modern: #9fb0bd;
  --open: #ada38d;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 4px 18px rgba(0, 0, 0, 0.35);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #17140f;
    --paper-2: #211c14;
    --ink: #f0e9da;
    --ink-soft: #d3c9b4;
    --muted: #b2a891;
    --line: #3a332a;
    --accent: #f0936f;
    --accent-ink: #1c0f0a;
    --chip: #2a2419;
    --card: #201b13;
    --good: #7fd79a;
    --bad: #f08a8a;
    --focus: #9db9ff;
    --celtic: #7fb8e0;
    --roman: #f0936f;
    --saxon: #a9c96a;
    --norman: #c09ff0;
    --modern: #9fb0bd;
    --open: #ada38d;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 4px 18px rgba(0, 0, 0, 0.35);
  }
  :root:not([data-theme="light"]) .stratum { color: #101418; }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Source Serif 4", Georgia, "Times New Roman", serif;
  font-size: 1.075rem;
  line-height: 1.65;
}
h1, h2, h3, .kicker, .topbar, .rail, .chip, .stratum, .conf, button, input, .card-name {
  font-family: Fraunces, "Source Serif 4", Georgia, serif;
}
a { color: var(--accent); }
a:visited { color: var(--accent); }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; border-radius: 4px; }
main { display: block; }
.wrap { max-width: var(--measure); margin: 0 auto; padding: 0 1.25rem; }
section { scroll-margin-top: calc(var(--bar-h) + 12px); padding: 2.5rem 0 0.5rem; }
h2 { font-size: 1.7rem; line-height: 1.25; margin: 0 0 0.6rem; letter-spacing: -0.01em; }
h2 .anchor { color: inherit; text-decoration: none; }
h2 .anchor:hover { text-decoration: underline; }
.eyebrow {
  font-size: 0.8rem; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--muted); margin: 0 0 0.4rem;
}
.lede { font-size: 1.2rem; color: var(--ink-soft); margin-top: 0; }

/* ------------------------------------------------------------ topbar */
.topbar {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; gap: 0.75rem;
  min-height: var(--bar-h); padding: 0 0.9rem;
  background: var(--paper); border-bottom: 1px solid var(--line);
}
.topbar .home { font-weight: 700; text-decoration: none; color: var(--ink); white-space: nowrap; }
.topnav { display: flex; gap: 0.15rem; overflow-x: auto; }
.topnav a {
  color: var(--ink-soft); text-decoration: none; font-size: 0.92rem;
  padding: 0.3rem 0.55rem; border-radius: 6px; white-space: nowrap;
}
.topnav a:hover { background: var(--chip); color: var(--ink); }
.topbar .spacer { flex: 1 1 auto; }
.topbar .chip {
  border: 1px solid var(--line); border-radius: 999px; padding: 0.15rem 0.7rem;
  font-size: 0.85rem; text-decoration: none; color: var(--ink); background: var(--card);
  white-space: nowrap;
}
.icon-btn {
  border: 1px solid var(--line); background: var(--card); color: var(--ink);
  border-radius: 999px; width: 1.9rem; height: 1.9rem; cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center; padding: 0;
}

/* ---------------------------------------------------------------- rail */
.rail {
  position: fixed; right: 0.6rem; top: 50%; transform: translateY(-50%);
  display: none; flex-direction: column; gap: 0.35rem; z-index: 40;
}
@media (min-width: 1100px) { .rail { display: flex; } }
.rail a {
  display: flex; align-items: center; gap: 0.4rem; text-decoration: none;
  color: var(--muted); font-size: 0.75rem;
}
.rail a i { width: 0.55rem; height: 0.55rem; border-radius: 50%; background: var(--line); }
.rail a span { opacity: 0; transition: opacity 0.15s; }
.rail a:hover span { opacity: 1; }

/* ---------------------------------------------------------------- hero */
.hero { padding: 3rem 0 1rem; }
.kicker { font-size: 0.82rem; letter-spacing: 0.16em; color: var(--accent); margin: 0 0 0.7rem; font-weight: 700; }
.hero h1 { font-size: clamp(2rem, 5.2vw, 3.1rem); line-height: 1.08; margin: 0 0 0.9rem; letter-spacing: -0.02em; }
.hero-answer {
  font-size: 1.3rem; line-height: 1.45; margin: 0 0 0.9rem;
  border-left: 4px solid var(--accent); padding-left: 0.9rem; color: var(--ink);
}
.deck { color: var(--ink-soft); font-size: 1.1rem; margin: 0 0 1.2rem; }
.cta-row { display: flex; flex-wrap: wrap; gap: 0.7rem; margin-bottom: 1.4rem; }
.cta {
  display: inline-block; background: var(--accent); color: var(--accent-ink) !important;
  font-weight: 700; text-decoration: none; padding: 0.6rem 1.3rem; border-radius: 999px;
  font-size: 1.02rem;
}
.facts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.7rem; margin: 0; padding: 0; }
.facts div { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 0.6rem 0.75rem; }
.facts dt { font-size: 1.25rem; font-weight: 700; color: var(--accent); }
.facts dd { margin: 0; font-size: 0.86rem; color: var(--ink-soft); line-height: 1.4; }
@media (max-width: 560px) { .facts { grid-template-columns: 1fr; } }

/* ------------------------------------------------------------- decoder */
.decode-box {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 1.2rem; margin: 1rem 0;
}
.decode-box label { display: block; font-weight: 700; margin-bottom: 0.4rem; }
#decode-input {
  width: 100%; font-size: 1.15rem; padding: 0.6rem 0.8rem;
  border: 2px solid var(--line); border-radius: 8px; background: var(--paper); color: var(--ink);
}
#decode-input:focus { border-color: var(--accent); outline: none; }
.examples { display: flex; flex-wrap: wrap; gap: 0.45rem; margin-top: 0.7rem; align-items: center; }
.examples span { font-size: 0.9rem; color: var(--muted); }
.examples button {
  border: 1px solid var(--line); background: var(--chip); color: var(--ink);
  border-radius: 999px; padding: 0.25rem 0.8rem; cursor: pointer; font-size: 0.92rem;
}
.examples button:hover { border-color: var(--accent); }
#decode-card {
  margin-top: 1rem; border-top: 2px solid var(--accent); padding-top: 1rem;
}
#decode-card[hidden] { display: none; }
.card-name { font-size: 1.5rem; font-weight: 700; margin: 0 0 0.5rem; }
.stratum {
  display: inline-block; font-size: 0.78rem; font-weight: 700; letter-spacing: 0.06em;
  text-transform: uppercase; border-radius: 999px; padding: 0.12rem 0.65rem;
  color: #fff; vertical-align: middle;
}
.s-celtic { background: var(--celtic); } .s-roman { background: var(--roman); }
.s-saxon { background: var(--saxon); } .s-norman { background: var(--norman); }
.s-modern { background: var(--modern); } .s-open { background: var(--open); }
[data-theme="dark"] .stratum { color: #101418; }
.bits { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 0.6rem 0; }
.bit {
  border: 1px solid var(--line); border-radius: 8px; padding: 0.35rem 0.7rem;
  background: var(--paper); min-width: 0;
}
.bit strong { display: block; font-size: 1.2rem; line-height: 1.2; }
.bit span { display: block; font-size: 0.82rem; color: var(--ink-soft); }
.bit + .bit { position: relative; margin-left: 0.9rem; }
.bit + .bit::before { content: "+"; position: absolute; left: -1.1rem; top: 0.4rem; color: var(--muted); }
.card-early, .card-meaning, .card-conf { margin: 0.45rem 0; }
.card-early strong { font-size: 1.1rem; }
.conf {
  display: inline-block; font-size: 0.78rem; font-weight: 700; letter-spacing: 0.05em;
  text-transform: uppercase; border-radius: 4px; padding: 0.1rem 0.5rem;
  border: 1.5px solid currentColor;
}
.c-attested { color: var(--good); } .c-inferred { color: var(--accent); } .c-open { color: var(--muted); }
.decode-meta { display: flex; justify-content: space-between; gap: 1rem; align-items: baseline; margin-top: 1rem; }
#decode-count { font-size: 0.9rem; color: var(--muted); }
.table-scroll { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); }
#decode-table { border-collapse: collapse; width: 100%; font-size: 0.92rem; }
#decode-table th, #decode-table td { text-align: left; padding: 0.5rem 0.7rem; border-bottom: 1px solid var(--line); }
#decode-table thead th { background: var(--paper-2); font-size: 0.82rem; letter-spacing: 0.05em; text-transform: uppercase; }
#decode-table tr[data-live="1"] td { background: var(--chip); }
.row-pick {
  background: none; border: none; padding: 0; cursor: pointer; color: var(--accent);
  font-size: inherit; font-weight: 700; text-align: left;
}
html:not(.js) .needs-js, html:not(.js) .trap-picks { display: none; }
html:not(.js) .row-pick { display: none; }
html.js .row-plain { display: none; }

/* -------------------------------------------------------------- strata */
.stratum-grid { display: grid; gap: 0.9rem; margin-top: 1rem; }
.stratum-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.1rem 1.2rem; border-top: 5px solid var(--open);
}
.stratum-card.celtic { border-top-color: var(--celtic); } .stratum-card.roman { border-top-color: var(--roman); }
.stratum-card.saxon { border-top-color: var(--saxon); } .stratum-card.norman { border-top-color: var(--norman); }
.stratum-card.modern { border-top-color: var(--modern); }
.stratum-card h3 { margin: 0 0 0.3rem; font-size: 1.25rem; }
.stratum-card h3 .n { color: var(--muted); font-weight: 400; font-size: 1rem; }
.stratum-card p { margin: 0.4rem 0; }
.showcase { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 0.6rem; }
.showcase a {
  border: 1px solid var(--line); border-radius: 999px; padding: 0.15rem 0.7rem;
  text-decoration: none; font-size: 0.9rem; background: var(--paper);
}

/* ---------------------------------------------------------------- hams */
.vs-grid { display: grid; gap: 0.9rem; margin-top: 1rem; }
@media (min-width: 700px) { .vs-grid { grid-template-columns: 1fr 1fr; } }
.vs-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.1rem 1.2rem;
}
.vs-card h3 { margin: 0 0 0.3rem; font-size: 1.3rem; }
.vs-card .oe { font-size: 1.05rem; color: var(--accent); font-weight: 700; }
.evidence { margin: 0.7rem 0 0; padding-left: 1.1rem; }
.evidence li { margin-bottom: 0.35rem; }
.evidence li::marker { color: var(--accent); }

/* --------------------------------------------------------------- shifts */
.shifts { width: 100%; border-collapse: collapse; margin-top: 1rem; font-size: 0.95rem; }
.shifts th, .shifts td { text-align: left; padding: 0.5rem 0.6rem; border-bottom: 1px solid var(--line); }
.shifts thead th { font-size: 0.8rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); }
.shifts td.oe { font-weight: 700; }
.shifts .arrow { color: var(--muted); padding: 0 0.1rem; }

/* ----------------------------------------------------------------- game */
.trap-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1rem 1.1rem; margin: 0.8rem 0;
}
.trap-card h3 { margin: 0 0 0.5rem; font-size: 1.3rem; }
.trap-picks { display: grid; gap: 0.5rem; }
@media (min-width: 640px) { .trap-picks { grid-template-columns: 1fr 1fr; } }
.trap-picks button {
  border: 2px solid var(--line); background: var(--paper); color: var(--ink);
  border-radius: 8px; padding: 0.6rem 0.8rem; cursor: pointer; font-size: 0.98rem; text-align: left;
}
.trap-picks button:hover:not(:disabled) { border-color: var(--accent); }
.trap-picks button[aria-pressed="true"] { border-color: var(--accent); background: var(--chip); }
.trap-card[data-verdict="right"] { border-color: var(--good); }
.trap-card[data-verdict="wrong"] { border-color: var(--bad); }
.trap-reveal { margin: 0.7rem 0 0; padding-top: 0.6rem; border-top: 1px dashed var(--line); }
.trap-reveal[hidden] { display: none; }
.trap-reveal strong { color: var(--good); }
.trap-card[data-verdict="wrong"] .trap-reveal strong { color: var(--bad); }
.game-bar {
  display: flex; flex-wrap: wrap; gap: 0.6rem 1.2rem; align-items: center;
  background: var(--paper-2); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 0.7rem 1rem; margin-top: 1rem; position: sticky; bottom: 0.6rem; z-index: 10;
}
.game-bar p { margin: 0; }
#traps-score { font-weight: 700; font-size: 1.1rem; }
#traps-best, #traps-msg { font-size: 0.92rem; color: var(--ink-soft); }
.game-bar button {
  border: 1px solid var(--line); background: var(--card); color: var(--ink);
  border-radius: 999px; padding: 0.35rem 1rem; cursor: pointer; font-size: 0.92rem;
}
.game-bar button:hover { border-color: var(--accent); }

/* -------------------------------------------------------------- sources */
.src-groups { display: grid; gap: 1rem; margin-top: 1rem; }
.src-groups h3 { font-size: 1.05rem; margin: 0 0 0.3rem; letter-spacing: 0.04em; text-transform: uppercase; color: var(--muted); }
.src-groups ul { margin: 0; padding-left: 1.1rem; }
.src-groups li { margin-bottom: 0.4rem; }
.src-groups li::marker { color: var(--accent); }
.method { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem 1.2rem; margin-top: 1rem; }
.method p { margin: 0.4rem 0; }

/* ------------------------------------------------------------------ faq */
.faq details { border: 1px solid var(--line); border-radius: 8px; margin: 0.5rem 0; background: var(--card); }
.faq summary { cursor: pointer; padding: 0.7rem 1rem; font-weight: 700; }
.faq details p { padding: 0 1rem 0.8rem; margin: 0; }

/* --------------------------------------------------------------- figures */
figure { margin: 1.5rem 0; }
.paper { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 0.6rem; box-shadow: var(--shadow); }
.paper img { display: block; width: 100%; height: auto; border-radius: 6px; }
figcaption { font-size: 0.88rem; color: var(--muted); margin-top: 0.5rem; }

/* ---------------------------------------------------------------- footer */
footer { border-top: 1px solid var(--line); margin-top: 3rem; padding: 1.5rem 0 3rem; }
footer p { font-size: 0.9rem; color: var(--muted); margin: 0.3rem 0; }
.toc { columns: 2; margin: 1rem 0; padding-left: 1.2rem; }
.toc li { margin-bottom: 0.25rem; break-inside: avoid; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 0.5rem; top: 0.5rem; background: var(--card); padding: 0.5rem 1rem; z-index: 99; }