/* RefConvert
   Layout: sticky top bar, hero on a ruled "index card" ground, the two-pane tool as the centrepiece,
   then explanatory sections (steps, features, styles, FAQ) and a four-column footer.
   Fonts are self-hosted, so no requests go to third parties. */

@font-face { font-family: "Literata"; font-weight: 500; font-display: swap; src: url(../fonts/literata-latin-500-normal.woff2) format("woff2"); unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; }
@font-face { font-family: "Literata"; font-weight: 500; font-display: swap; src: url(../fonts/literata-latin-ext-500-normal.woff2) format("woff2"); unicode-range: U+0100-02AF, U+0304, U+0308, U+0329, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20CF, U+2113, U+2C60-2C7F, U+A720-A7FF; }
@font-face { font-family: "Literata"; font-weight: 600; font-display: swap; src: url(../fonts/literata-latin-600-normal.woff2) format("woff2"); unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; }
@font-face { font-family: "Literata"; font-weight: 600; font-display: swap; src: url(../fonts/literata-latin-ext-600-normal.woff2) format("woff2"); unicode-range: U+0100-02AF, U+0304, U+0308, U+0329, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20CF, U+2113, U+2C60-2C7F, U+A720-A7FF; }
@font-face { font-family: "IBM Plex Sans"; font-weight: 400; font-display: swap; src: url(../fonts/ibm-plex-sans-latin-400-normal.woff2) format("woff2"); unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; }
@font-face { font-family: "IBM Plex Sans"; font-weight: 400; font-display: swap; src: url(../fonts/ibm-plex-sans-latin-ext-400-normal.woff2) format("woff2"); unicode-range: U+0100-02AF, U+0304, U+0308, U+0329, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20CF, U+2113, U+2C60-2C7F, U+A720-A7FF; }
@font-face { font-family: "IBM Plex Sans"; font-weight: 500; font-display: swap; src: url(../fonts/ibm-plex-sans-latin-500-normal.woff2) format("woff2"); unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; }
@font-face { font-family: "IBM Plex Sans"; font-weight: 500; font-display: swap; src: url(../fonts/ibm-plex-sans-latin-ext-500-normal.woff2) format("woff2"); unicode-range: U+0100-02AF, U+0304, U+0308, U+0329, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20CF, U+2113, U+2C60-2C7F, U+A720-A7FF; }
@font-face { font-family: "IBM Plex Sans"; font-weight: 600; font-display: swap; src: url(../fonts/ibm-plex-sans-latin-600-normal.woff2) format("woff2"); unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; }
@font-face { font-family: "IBM Plex Sans"; font-weight: 600; font-display: swap; src: url(../fonts/ibm-plex-sans-latin-ext-600-normal.woff2) format("woff2"); unicode-range: U+0100-02AF, U+0304, U+0308, U+0329, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20CF, U+2113, U+2C60-2C7F, U+A720-A7FF; }
@font-face { font-family: "IBM Plex Mono"; font-weight: 400; font-display: swap; src: url(../fonts/ibm-plex-mono-latin-400-normal.woff2) format("woff2"); unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; }
@font-face { font-family: "IBM Plex Mono"; font-weight: 400; font-display: swap; src: url(../fonts/ibm-plex-mono-latin-ext-400-normal.woff2) format("woff2"); unicode-range: U+0100-02AF, U+0304, U+0308, U+0329, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20CF, U+2113, U+2C60-2C7F, U+A720-A7FF; }
@font-face { font-family: "IBM Plex Mono"; font-weight: 500; font-display: swap; src: url(../fonts/ibm-plex-mono-latin-500-normal.woff2) format("woff2"); unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; }


:root {
  --paper: #f6f7f9; --surface: #ffffff; --sunk: #eef1f5; --ink: #152337; --ink-2: #3a4a60; --muted: #5a6778; --line: #dde2ea; --line-strong: #c6ceda;
  --accent: #1e3a5f; --accent-hover: #152337; --accent-ink: #ffffff; --accent-soft: #e6ecf4; --gilt: #a16207; --gilt-soft: #f6ecd9;
  --warn: #b5470b; --warn-soft: #fdebe0; --ok: #2f6b4f; --ok-soft: #e1f0e8;
  --shadow: 0 1px 2px rgba(21, 35, 55, .05), 0 6px 20px rgba(21, 35, 55, .06);
  --f-display: "Literata", Georgia, "Times New Roman", serif;
  --f-body: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --f-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --au-i: #8f4a1c; --au-b: #f8e9dc; --py-i: #7a5a00; --py-b: #f6eed2; --ti-i: #1e4f86; --ti-b: #e2ebf7;
  --jo-i: #5b3f8c; --jo-b: #ece6f6; --nu-i: #2f6b4f; --nu-b: #e1f0e8; --do-i: #7d3557; --do-b: #f5e4ec;
  --r: 8px; --r-sm: 5px;
  --w: 1240px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #0f1622; --surface: #162030; --sunk: #1d293b; --ink: #e6ebf2; --ink-2: #c3ccda; --muted: #95a2b5; --line: #26324a; --line-strong: #34425c;
    --accent: #8fb0e6; --accent-hover: #a9c2ee; --accent-ink: #0f1622; --accent-soft: #1e2c44; --gilt: #e0b25a; --gilt-soft: #33291a;
    --warn: #f5a06b; --warn-soft: #3a2418; --ok: #7fcba4; --ok-soft: #17302a;
    --shadow: 0 1px 2px rgba(0, 0, 0, .35), 0 8px 24px rgba(0, 0, 0, .3);
    --au-i: #f2b48f; --au-b: #3d2618; --py-i: #e9cf73; --py-b: #36301a; --ti-i: #9cc6ef; --ti-b: #1b2d40;
    --jo-i: #c9b2f0; --jo-b: #2c2340; --nu-i: #96d4ad; --nu-b: #1a3324; --do-i: #f0a7c8; --do-b: #3a2030;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #0f1622; --surface: #162030; --sunk: #1d293b; --ink: #e6ebf2; --ink-2: #c3ccda; --muted: #95a2b5; --line: #26324a; --line-strong: #34425c;
    --accent: #8fb0e6; --accent-hover: #a9c2ee; --accent-ink: #0f1622; --accent-soft: #1e2c44; --gilt: #e0b25a; --gilt-soft: #33291a;
    --warn: #f5a06b; --warn-soft: #3a2418; --ok: #7fcba4; --ok-soft: #17302a;
    --shadow: 0 1px 2px rgba(0, 0, 0, .35), 0 8px 24px rgba(0, 0, 0, .3);
  --au-i: #f2b48f; --au-b: #3d2618; --py-i: #e9cf73; --py-b: #36301a; --ti-i: #9cc6ef; --ti-b: #1b2d40;
  --jo-i: #c9b2f0; --jo-b: #2c2340; --nu-i: #96d4ad; --nu-b: #1a3324; --do-i: #f0a7c8; --do-b: #3a2030;
  color-scheme: dark;
}

/* ---------- base ---------- */
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 72px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; animation: none !important; } }
body { margin: 0; background: var(--paper); color: var(--ink); font: 15.5px/1.6 var(--f-body); -webkit-font-smoothing: antialiased; }
a { color: var(--accent); text-underline-offset: 3px; }
a:hover { color: var(--accent-hover); }
[hidden] { display: none !important; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 3px; }
h1, h2, h3 { text-wrap: balance; }
code, kbd { font-family: var(--f-mono); font-size: .9em; }
code { background: var(--sunk); padding: 1px 5px; border-radius: 4px; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 8px; background: var(--surface); padding: 8px 12px; border-radius: var(--r-sm); z-index: 50; }
.container {
  max-width: var(--w); margin-inline: auto;
  padding-left: max(20px, env(safe-area-inset-left, 0px)); padding-right: max(20px, env(safe-area-inset-right, 0px));
}

/* ---------- top bar ---------- */
.topbar { position: sticky; top: 0; z-index: 20; background: color-mix(in srgb, var(--surface) 92%, transparent); backdrop-filter: saturate(1.4) blur(8px); padding-top: env(safe-area-inset-top, 0px); transition: box-shadow .2s; }
.topbar.scrolled { box-shadow: 0 1px 0 var(--line), 0 6px 18px rgba(21, 35, 55, .06); }
body.doc .topbar { box-shadow: 0 1px 0 var(--line); }
.topbar-in { max-width: var(--w); margin-inline: auto; padding: 10px max(20px, env(safe-area-inset-right, 0px)) 10px max(20px, env(safe-area-inset-left, 0px)); display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.logo { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font: 600 1.2rem/1 var(--f-display); letter-spacing: -.01em; }
.logo:hover { color: var(--ink); }
.mark { width: 30px; height: 30px; flex: none; stroke-linecap: round; }
.mark rect { fill: var(--accent); stroke: var(--accent); stroke-width: 2.4; }
.mark path { fill: none; stroke: var(--gilt-soft); stroke-width: 2.4; }
:root[data-theme="dark"] .mark path { stroke: var(--paper); }
.mainnav { display: flex; gap: 4px 18px; flex-wrap: wrap; }
.mainnav a { color: var(--ink-2); text-decoration: none; font-size: 14.5px; font-weight: 500; padding: 4px 0; }
.mainnav a:hover { color: var(--accent); }

/* ---------- hero ---------- */
.hero { padding-block: 52px 44px; background: var(--surface); }

.hero-grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); gap: 40px; align-items: center; }
@media (max-width: 980px) { .hero-grid { grid-template-columns: minmax(0, 1fr); gap: 28px; } }
.hero .crumbs { margin-bottom: 12px; }
.hero h1 { font: 600 clamp(1.9rem, 1.3rem + 2vw, 2.75rem)/1.12 var(--f-display); letter-spacing: -.015em; margin: 0; max-width: 20ch; }
.hero-cta { margin-top: 22px; gap: 10px; }
.hero-lede { font-size: 1.08rem; color: var(--ink-2); margin: 14px 0 0; max-width: 68ch; }
.trust { list-style: none; margin: 22px 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 10px 24px; font-size: 14px; color: var(--ink-2); }
.trust li { display: inline-flex; align-items: center; gap: 7px; }
.trust svg { width: 18px; height: 18px; fill: none; stroke: var(--gilt); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

/* ---------- tool ---------- */
.tool { padding-block: 36px 8px; }
.grid { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 20px; align-items: start; }
@media (max-width: 980px) { .grid { grid-template-columns: minmax(0, 1fr); } }
.pane { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); box-shadow: var(--shadow); min-width: 0; }
.pane-head { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px; padding: 10px 14px; border-bottom: 1px solid var(--line); min-height: 54px; }
.pane-head h2 { font-size: 14.5px; font-weight: 600; margin: 0; display: inline-flex; align-items: center; gap: 8px; }
.step { display: inline-grid; place-items: center; width: 22px; height: 22px; border-radius: 50%; background: var(--accent-soft); color: var(--accent); font: 600 12px/1 var(--f-body); }
.pane-body { padding: 14px; display: flex; flex-direction: column; gap: 12px; min-width: 0; }
textarea, input, select { font: inherit; color: var(--ink); }
.dropzone { position: relative; }
#src { width: 100%; min-height: 400px; resize: vertical; font: 13px/1.6 var(--f-mono); background: var(--sunk); border: 1px solid var(--line); border-radius: var(--r-sm); padding: 12px 14px; }
#src:focus { border-color: var(--accent); outline: none; box-shadow: 0 0 0 3px var(--accent-soft); }
.drop-hint { display: none; position: absolute; inset: 0; place-items: center; border: 2px dashed var(--accent); border-radius: var(--r-sm); background: color-mix(in srgb, var(--accent-soft) 85%, transparent); color: var(--accent); font-weight: 600; pointer-events: none; }
.dropzone.over .drop-hint { display: grid; }
select, input[type="search"] { font-size: 14px; background: var(--surface); border: 1px solid var(--line-strong); border-radius: var(--r-sm); padding: 6px 8px; min-width: 0; }
.row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.row.spread { justify-content: space-between; }
.btn { font: inherit; font-size: 14px; font-weight: 500; border: 1px solid var(--line-strong); background: var(--surface); color: var(--ink); border-radius: var(--r-sm); padding: 8px 14px; cursor: pointer; display: inline-flex; align-items: center; gap: 7px; white-space: nowrap; text-decoration: none; transition: background .15s, border-color .15s; }
.btn:hover { border-color: var(--ink-2); color: var(--ink); }
.btn svg { width: 15px; height: 15px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: var(--accent-ink); }
.btn.ghost { border-color: transparent; background: transparent; color: var(--muted); }
.btn.small { font-size: 13px; padding: 5px 10px; }
.btn[disabled] { opacity: .55; cursor: default; }
.btn kbd { font-size: 11px; opacity: .75; border: 1px solid currentColor; border-radius: 4px; padding: 0 4px; }
@media (max-width: 600px) { .btn kbd { display: none; } }
.sr-file { position: absolute; width: 1px; height: 1px; opacity: 0; pointer-events: none; }
.check { display: inline-flex; gap: 7px; align-items: center; font-size: 13.5px; color: var(--ink-2); cursor: pointer; }
.check.small { font-size: 13px; }
.check input { accent-color: var(--accent); }
.inline-select { display: inline-flex; gap: 6px; align-items: center; font-size: 13.5px; color: var(--ink-2); }
.inline-select select { font-size: 13px; padding: 3px 6px; }
.status { font-size: 13.5px; color: var(--muted); margin: 0; min-height: 1.5em; }
.status.err { color: var(--warn); }
.note { font-size: 13px; color: var(--muted); margin: 0; }
.label { font-size: 13px; color: var(--muted); font-weight: 500; }

.tabs { display: flex; gap: 0; flex: 1; min-width: 0; }
.tab { font: inherit; background: none; border: 0; border-bottom: 2px solid transparent; color: var(--muted); padding: 6px 14px 8px 0; margin-bottom: -11px; cursor: pointer; display: inline-flex; align-items: center; gap: 9px; text-align: left; flex: 1 1 0; min-width: 0; position: relative; min-height: 44px; }
.tab + .tab { padding-left: 14px; }
.tab + .tab::before { content: ""; position: absolute; left: 0; top: 50%; width: 1px; height: 26px; transform: translateY(-50%); background: var(--line); }
.tab:hover .tab-t { color: var(--ink); }
.tab[aria-selected="true"] { border-bottom-color: var(--accent); }
.tab[aria-selected="true"] .tab-t { color: var(--ink); }
.tab-txt { display: flex; flex-direction: column; min-width: 0; line-height: 1.25; }
.tab-t { font-size: 14.5px; font-weight: 600; color: var(--ink-2); }
.tab-meta { font-size: 12.5px; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.tab[data-state="warn"] .tab-meta { color: var(--warn); }
.step::before { content: attr(data-n); }
.tab[aria-selected="true"] .step { background: var(--accent); color: var(--accent-ink); }
.tab[data-state="done"] .step, .tab[data-state="ready"] .step { background: var(--ok-soft); color: var(--ok); }
.tab[data-state="done"] .step::before { content: "✓"; }
.tab[aria-selected="true"][data-state] .step { background: var(--accent); color: var(--accent-ink); }
.tab[data-state="empty"] .step { background: var(--sunk); color: var(--muted); }
@media (max-width: 600px) { .tab-meta { display: none; } .tab { gap: 6px; padding-right: 8px; } .tab + .tab { padding-left: 8px; } }
.count { font-family: var(--f-mono); font-size: 12px; font-variant-numeric: tabular-nums; }
.toolbar { display: flex; flex-wrap: wrap; gap: 8px 12px; align-items: center; justify-content: space-between; }
.summary { font-size: 13.5px; color: var(--muted); display: flex; gap: 14px; flex-wrap: wrap; font-variant-numeric: tabular-nums; }
.summary b { color: var(--ink); font-weight: 600; }

/* records */
.records { border-top: 1px solid var(--line); max-height: 720px; overflow: auto; }
.rec { display: grid; grid-template-columns: 2rem minmax(0, 1fr); gap: 4px 8px; padding: 12px 2px 12px 10px; border-bottom: 1px solid var(--line); border-left: 3px solid transparent; }
.rec.is-warn { border-left-color: var(--warn); }
.rec.is-ok { border-left-color: color-mix(in srgb, var(--ok) 45%, transparent); }
.rec-n { font-family: var(--f-mono); font-size: 12px; color: var(--muted); padding-top: 3px; font-variant-numeric: tabular-nums; }
.rec-main { min-width: 0; display: flex; flex-direction: column; gap: 6px; }
.rec-cite { font: 500 15px/1.55 var(--f-display); overflow-wrap: anywhere; }
.rec-cite .csl-entry { padding: 0; text-indent: 0; }
.rec-cite .csl-left-margin { display: inline; margin-right: .4em; }
.rec-cite .csl-right-inline { display: inline; }
.rec-intext { font-size: 13px; color: var(--muted); }
.rec-meta { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.chips-inline { display: inline-flex; flex-wrap: wrap; gap: 6px; }
.chip { font-family: var(--f-mono); font-size: 11.5px; border-radius: 4px; padding: 1px 6px; border: 1px solid var(--line-strong); color: var(--muted); white-space: nowrap; }
.chip.ty { color: var(--accent); border-color: currentColor; }
.chip.warn { background: var(--warn-soft); color: var(--warn); border-color: transparent; }
.chip.ok { background: var(--ok-soft); color: var(--ok); border-color: transparent; }
.rec-actions { margin-left: auto; display: flex; gap: 6px; }
.edit { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 8px 10px; background: var(--sunk); border-radius: var(--r-sm); padding: 12px; }
.edit label { display: flex; flex-direction: column; gap: 3px; font-size: 12px; color: var(--muted); min-width: 0; }
.edit .wide { grid-column: 1 / -1; }
.edit input, .edit textarea, .edit select { font-size: 13.5px; background: var(--surface); border: 1px solid var(--line-strong); border-radius: 4px; padding: 6px 8px; width: 100%; }
.edit textarea { min-height: 64px; resize: vertical; }
.raw { font-family: var(--f-mono); font-size: 12px; color: var(--muted); overflow-wrap: anywhere; grid-column: 1 / -1; margin: 0; }
.empty { padding: 32px 8px; text-align: center; color: var(--muted); }

/* style picker */
.stylebar { display: flex; flex-wrap: wrap; gap: 12px; align-items: flex-end; justify-content: space-between; }
.style-current { display: flex; flex-direction: column; gap: 5px; min-width: 0; flex: 1 1 300px; }
.style-lang { display: flex; flex-direction: column; gap: 5px; }
.style-btn { font: 500 16px/1.3 var(--f-display); color: var(--ink); background: var(--sunk); border: 1px solid var(--line); border-radius: var(--r-sm); padding: 9px 12px; display: flex; align-items: center; gap: 10px; cursor: pointer; text-align: left; min-width: 0; }
.style-btn:hover { border-color: var(--line-strong); }
.style-btn > span:first-child { flex: 1; min-width: 0; overflow-wrap: anywhere; }
.kbd-hint { font: 500 11px var(--f-mono); color: var(--muted); border: 1px solid var(--line-strong); border-radius: 4px; padding: 1px 5px; white-space: nowrap; }
@media (max-width: 600px) { .kbd-hint { display: none; } }
.fmt-badge { font: 500 11.5px var(--f-mono); color: var(--muted); border: 1px solid var(--line-strong); border-radius: 4px; padding: 1px 6px; white-space: nowrap; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chips button { font: inherit; font-size: 12.5px; background: var(--sunk); border: 1px solid transparent; color: var(--ink); border-radius: 999px; padding: 3px 11px; cursor: pointer; }
.chips button:hover { border-color: var(--line-strong); }
.chips button[aria-pressed="true"] { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }
.style-list { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.style-list li { padding: 8px; border-bottom: 1px solid var(--line); cursor: pointer; display: flex; gap: 10px; align-items: baseline; }
.style-list li .t { flex: 1; min-width: 0; overflow-wrap: anywhere; }
.style-list li .s { font-size: 12px; color: var(--muted); display: block; }
.style-list li[aria-selected="true"], .style-list li:hover { background: var(--accent-soft); }

/* bibliography output (citeproc HTML) */
.bib { font: 500 15.5px/1.6 var(--f-display); overflow-wrap: anywhere; min-height: 120px; }
.bib .csl-bib-body { display: flex; flex-direction: column; gap: 10px; }
.bib.hang .csl-entry { padding-left: 2em; text-indent: -2em; }
.bib.align .csl-entry { display: grid; grid-template-columns: 3em minmax(0, 1fr); }
.bib .csl-left-margin { font: 400 14px/1.6 var(--f-body); color: var(--muted); font-variant-numeric: tabular-nums; }
.bib .intext { display: block; font: 400 13px/1.5 var(--f-body); color: var(--muted); margin-top: 2px; text-indent: 0; }

/* export */
.seg { display: inline-flex; border: 1px solid var(--line-strong); border-radius: var(--r-sm); overflow: hidden; }
.seg button { font: inherit; font-size: 13.5px; background: var(--surface); color: var(--muted); border: 0; padding: 6px 14px; cursor: pointer; }
.seg button + button { border-left: 1px solid var(--line-strong); }
.seg button[aria-checked="true"] { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.code { font: 12.5px/1.6 var(--f-mono); background: var(--sunk); border-radius: var(--r-sm); padding: 12px 14px; margin: 0; overflow: auto; max-height: 620px; white-space: pre; }
.code .t { color: var(--accent); font-weight: 500; }

/* ---------- content sections ---------- */
.section { padding-block: 56px 8px; }
.section-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.section-title { font: 600 clamp(1.45rem, 1.1rem + 1.2vw, 1.9rem)/1.2 var(--f-display); letter-spacing: -.01em; margin: 0 0 22px; }
.section-lede { color: var(--ink-2); max-width: 70ch; margin: -8px 0 20px; }
.more { font-weight: 500; font-size: 14.5px; }
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0; border-top: 1px solid var(--line-strong); }
@media (max-width: 900px) { .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .steps { grid-template-columns: minmax(0, 1fr); } }
.steps li { padding: 18px 24px 22px 0; border-bottom: 1px solid var(--line); }
.steps .num { font: 600 2.4rem/1 var(--f-display); color: var(--gilt); }
.steps h3, .feature h3 { font: 600 1.08rem/1.3 var(--f-display); margin: 12px 0 6px; }
.steps p, .feature p { margin: 0; color: var(--ink-2); font-size: 14.5px; }
.features { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; border-top: 1px solid var(--line); }
.feature { padding: 18px 24px 20px 0; border-bottom: 1px solid var(--line); }
.feature h3 { margin-top: 0; }
.style-links { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 8px; }
.style-links a { display: block; padding: 10px 14px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--r-sm); color: var(--ink); text-decoration: none; font-weight: 500; font-size: 14.5px; }
.style-links a:hover { border-color: var(--accent); color: var(--accent); }
.faq { max-width: 860px; border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { cursor: pointer; padding: 15px 30px 15px 0; font-weight: 600; font-size: 15.5px; list-style: none; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 4px; top: 12px; font: 400 22px/1 var(--f-body); color: var(--accent); }
.faq details[open] summary::after { content: "–"; }
.faq details p { margin: 0 0 16px; color: var(--ink-2); max-width: 72ch; }
.prose-section { max-width: calc(var(--w)); }
.prose-section h2 { font: 600 1.35rem/1.3 var(--f-display); margin: 0 0 10px; }
.prose-section h2:not(:first-child) { margin-top: 28px; }
.prose-section p, .prose-section li { max-width: 72ch; color: var(--ink-2); }
.example-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); padding: 20px 22px; box-shadow: var(--shadow); max-width: 920px; }
.example-card h3 { font-size: 14px; font-weight: 600; color: var(--muted); margin: 0 0 10px; }
.example-card h3:not(:first-child) { margin-top: 20px; }
.intext-examples { display: flex; flex-wrap: wrap; gap: 8px 18px; margin: 0; font-family: var(--f-display); }

@media (max-width: 900px) { .features { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .features { grid-template-columns: minmax(0, 1fr); } }
/* ads: space is reserved so the page does not jump */
.ad-slot { margin-block: 32px 0; min-height: 120px; display: flex; flex-direction: column; gap: 4px; }
.ad-label { font-size: 12px; color: var(--muted); }

/* ---------- footer ---------- */
.site-foot { margin-top: 64px; background: var(--surface); border-top: 1px solid var(--line); padding-bottom: env(safe-area-inset-bottom, 0px); }
.foot-grid { display: grid; grid-template-columns: 1.6fr repeat(3, 1fr); gap: 28px; padding-block: 40px 24px; }
@media (max-width: 760px) { .foot-grid { grid-template-columns: 1fr 1fr; } .foot-brand { grid-column: 1 / -1; } }
.foot-brand p { color: var(--muted); font-size: 14px; max-width: 36ch; margin: 12px 0 0; }
.foot-grid nav { display: flex; flex-direction: column; gap: 6px; }
.foot-grid h3 { font-size: 14px; font-weight: 600; color: var(--ink); margin: 0 0 6px; }
.foot-grid nav a { color: var(--ink-2); text-decoration: none; font-size: 14px; }
.foot-grid nav a:hover { color: var(--accent); }
.foot-credits { border-top: 1px solid var(--line); padding-block: 16px 24px; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px; color: var(--muted); font-size: 13px; }
.foot-credits p { margin: 0; }

/* ---------- document pages ---------- */
.prose { max-width: 820px; padding-block: 32px 8px; }
.prose h1 { font: 600 clamp(1.8rem, 1.3rem + 1.8vw, 2.5rem)/1.15 var(--f-display); margin: 8px 0 18px; }
.prose h2 { font: 600 1.3rem/1.3 var(--f-display); margin: 30px 0 8px; }
.prose p, .prose li { color: var(--ink-2); }
.prose .lede { font-size: 1.08rem; }
.prose .style-links.wide { margin-block: 18px; }
.cite-box { background: var(--surface); border: 1px solid var(--line); border-left: 3px solid var(--accent); border-radius: var(--r-sm); padding: 12px 14px; font-family: var(--f-display); overflow-wrap: anywhere; }
.crumbs { font-size: 13.5px; color: var(--muted); }
.crumbs a { color: var(--muted); }
.cta { margin-top: 32px; }

dialog.consent { max-width: min(520px, calc(100vw - 32px)); border: 1px solid var(--line); border-radius: var(--r); background: var(--surface); color: var(--ink); padding: 22px 24px; box-shadow: var(--shadow); }
dialog.consent::backdrop { background: rgba(0, 0, 0, .4); }
dialog.consent h2 { font: 600 1.25rem/1.3 var(--f-display); margin: 0 0 10px; }
dialog.consent p { margin: 0 0 10px; color: var(--ink-2); font-size: 14.5px; }
.row.end { justify-content: flex-end; margin-top: 14px; }
.table-wrap { overflow-x: auto; margin-block: 16px; }
.prose table { border-collapse: collapse; width: 100%; font-size: 14px; }
.prose th, .prose td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
.prose th { font-size: 13px; font-weight: 600; color: var(--muted); }
details.lic { border-bottom: 1px solid var(--line); }
details.lic summary { cursor: pointer; padding: 10px 0; font-weight: 600; }
details.lic pre { font: 12px/1.5 var(--f-mono); white-space: pre-wrap; background: var(--sunk); padding: 12px; border-radius: var(--r-sm); max-height: 360px; overflow: auto; }
.toast { position: fixed; left: 50%; transform: translateX(-50%); bottom: calc(20px + env(safe-area-inset-bottom, 0px)); background: var(--ink); color: var(--paper); padding: 10px 16px; border-radius: var(--r-sm); font-size: 14px; max-width: min(92vw, 520px); z-index: 40; box-shadow: var(--shadow); }
@media print {
  .topbar, .hero, .site-foot, .section, .ad-slot, .pane-head, .toolbar, .stylebar, .style-panel, #view-records, #view-export, .grid > .pane:first-child { display: none !important; }
  .grid { display: block; } .pane { border: 0; box-shadow: none; } body { background: #fff; color: #000; }
}

/* ---------- buttons, icons ---------- */
.btn.large { font-size: 15.5px; padding: 11px 20px; }
.icon-btn { display: inline-grid; place-items: center; width: 40px; height: 40px; border: 1px solid transparent; border-radius: var(--r-sm); background: none; color: var(--ink-2); cursor: pointer; flex: none; }
.icon-btn:hover { border-color: var(--line-strong); color: var(--ink); }
.icon-btn svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
#themeBtn svg { display: none; }
#themeBtn[data-mode="system"] .i-system, #themeBtn:not([data-mode]) .i-system, #themeBtn[data-mode="light"] .i-light, #themeBtn[data-mode="dark"] .i-dark { display: block; }
.topbar-in { flex-wrap: nowrap; }
.mainnav { margin-left: auto; }
@media (max-width: 720px) {
  .topbar-in { flex-wrap: wrap; row-gap: 2px; padding-block: 8px 4px; }
  .mainnav { order: 3; width: 100%; margin-left: 0; flex-wrap: nowrap; overflow-x: auto; gap: 16px; scrollbar-width: none; padding-bottom: 4px; }
  .mainnav::-webkit-scrollbar { display: none; }
  .mainnav a { white-space: nowrap; font-size: 14px; padding: 8px 0; }
}
.palette.searching .palette-group { display: none; }
.btn, .tab, .chips button, .style-list li, .icon-btn, .toast-act { transition: background-color .15s, border-color .15s, color .15s; }

/* ---------- hero: anatomy of a reference ---------- */
.anatomy { margin: 0; background: var(--paper); border: 1px solid var(--line); border-radius: var(--r); padding: 22px 24px 18px; min-width: 0; }
.card-raw { font: 500 15.5px/1.75 var(--f-display); color: var(--ink); overflow-wrap: anywhere; }
.f-au { --fi: var(--au-i); --fb: var(--au-b); --d: 0ms; }
.f-py { --fi: var(--py-i); --fb: var(--py-b); --d: 140ms; }
.f-ti { --fi: var(--ti-i); --fb: var(--ti-b); --d: 280ms; }
.f-jo { --fi: var(--jo-i); --fb: var(--jo-b); --d: 420ms; }
.f-nu { --fi: var(--nu-i); --fb: var(--nu-b); --d: 560ms; }
.f-do { --fi: var(--do-i); --fb: var(--do-b); --d: 700ms; }
.card-raw .f { background: var(--fb); border-bottom: 2px solid var(--fi); padding: 1px 3px; border-radius: 3px 3px 0 0; -webkit-box-decoration-break: clone; box-decoration-break: clone; }
.card-ris { margin-top: 16px; padding-top: 14px; border-top: 1px solid var(--line); font: 13px/1.85 var(--f-mono); color: var(--ink-2); overflow-wrap: anywhere; }
.card-ris > div { padding-left: 10px; border-left: 3px solid var(--fi, var(--line)); }
.card-ris b { display: inline-block; min-width: 2.6em; font-weight: 500; color: var(--fi, var(--accent)); }
.card-ris b.in { min-width: 0; margin: 0 .35em 0 .6em; }
.anatomy figcaption { margin-top: 14px; font-size: 13.5px; color: var(--muted); }
@media (prefers-reduced-motion: no-preference) {
  .card-raw .f { animation: mark-in .55s ease-out both; animation-delay: calc(var(--d) + 250ms); }
  .card-ris > div { animation: line-in .45s ease-out both; animation-delay: calc(var(--d, 0ms) + 650ms); }
}
@keyframes mark-in { from { background-color: transparent; border-bottom-color: transparent; } }
@keyframes line-in { from { border-left-color: transparent; color: var(--muted); } }

/* ---------- source: dropzone, file chip ---------- */
.drop-empty { position: absolute; inset: 1px; display: grid; place-content: center; justify-items: center; gap: 10px; text-align: center; padding: 20px; pointer-events: none; color: var(--ink-2); }
.drop-empty svg { width: 44px; height: 44px; fill: none; stroke: var(--gilt); stroke-width: 1.4; stroke-linecap: round; stroke-linejoin: round; }
.drop-empty p { margin: 0; font-size: 14.5px; }
.drop-empty .row, .drop-empty label, .drop-empty button { pointer-events: auto; }
#src:focus ~ .drop-empty { opacity: .6; }
.help { font-size: 13px; color: var(--muted); margin: -4px 0 0; }
.file-chip { display: flex; align-items: center; gap: 10px; padding: 8px 8px 8px 12px; background: var(--gilt-soft); border-radius: var(--r-sm); font-size: 14px; min-width: 0; }
.file-chip svg { width: 20px; height: 20px; flex: none; fill: none; stroke: var(--gilt); stroke-width: 1.6; stroke-linejoin: round; }
.file-chip-t { flex: 1; min-width: 0; overflow-wrap: anywhere; }
.file-chip-t span { color: var(--muted); margin-left: 4px; }

/* ---------- check step: meter, progress ---------- */
.summary { align-items: center; }
.meter { width: 90px; height: 6px; border-radius: 3px; background: var(--sunk); overflow: hidden; }
.meter span { display: block; height: 100%; background: var(--ok); border-radius: 3px; }
.warn-t, .warn-t b { color: var(--warn) !important; }
.progress { display: flex; flex-direction: column; gap: 6px; }
.progress-bar { height: 4px; background: var(--sunk); border-radius: 2px; overflow: hidden; }
.progress-bar span { display: block; height: 100%; width: 0; background: var(--accent); transition: width .3s ease-out; }
.empty p { margin: 0 0 6px; }
.row.center { justify-content: center; margin-top: 8px; }

/* ---------- style palette (command palette) ---------- */
dialog.palette { width: min(680px, calc(100vw - 24px)); max-height: min(640px, calc(100vh - 48px)); padding: 0; border: 1px solid var(--line); border-radius: var(--r); background: var(--surface); color: var(--ink); box-shadow: 0 24px 64px rgba(0, 0, 0, .25); margin-top: 8vh; flex-direction: column; overflow: hidden; }
dialog.palette[open] { display: flex; }
dialog.palette::backdrop { background: rgba(0, 0, 0, .4); }
.palette-head { display: flex; align-items: center; gap: 8px; padding: 10px 10px 10px 16px; border-bottom: 1px solid var(--line); }
.palette-head > svg { width: 20px; height: 20px; flex: none; fill: none; stroke: var(--muted); stroke-width: 1.7; stroke-linecap: round; }
.palette-head input[type="search"] { flex: 1; min-width: 0; border: 0; background: transparent; font-size: 16px; padding: 8px 4px; outline: none; }
.palette-head select { max-width: 150px; }
.palette-body { overflow: auto; padding: 12px 16px 4px; display: flex; flex-direction: column; gap: 12px; flex: 1; }
.palette-group h3 { font-size: 13px; font-weight: 600; color: var(--muted); margin: 0 0 6px; }
.palette .style-list li { padding: 9px 8px; border-radius: var(--r-sm); border-bottom: 0; }
.palette-foot { margin: 0; padding: 8px 16px; border-top: 1px solid var(--line); font-size: 12.5px; color: var(--muted); }
@media (max-width: 600px) { dialog.palette { margin-top: 0; width: 100vw; max-width: 100vw; max-height: 100dvh; height: 100dvh; border-radius: 0; } .palette-head select { max-width: 110px; } }

/* ---------- toast with action ---------- */
.toast { display: flex; align-items: center; gap: 14px; }
.toast[hidden] { display: none !important; }
.toast-act { font: inherit; font-weight: 600; font-size: 14px; color: var(--paper); background: transparent; border: 1px solid color-mix(in srgb, var(--paper) 40%, transparent); border-radius: 4px; padding: 3px 10px; cursor: pointer; }
.toast-act:hover { background: color-mix(in srgb, var(--paper) 15%, transparent); }