/* Layout: reading console. Sticky doc rail left, one long scroll of 14 docs centre, comment ledger right. */
:root {
  --paper: #f4f6f7;
  --surface: #ffffff;
  --ink: #17222b;
  --muted: #586874;
  --line: #d8dfe4;
  --accent: #0a6c73;
  --accent-ink: #ffffff;
  --accent-soft: #dff0f1;
  --mark: #ffe48a;
  --mark-strong: #ffc93a;
  --mark-done: #dfe9e2;
  --danger: #b42318;
  --ok: #1d7448;
  --code-bg: #edf1f3;
  --shadow: 0 8px 28px rgba(16, 34, 44, .16);
  --f-display: "Be Vietnam Pro", "Segoe UI", system-ui, sans-serif;
  --f-body: "IBM Plex Sans", "Segoe UI", system-ui, sans-serif;
  --f-mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
  --top: 52px;
  --rail: 236px;
  --ledger: 352px;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #0f1519; --surface: #151d22; --ink: #e2e8ec; --muted: #93a3ad; --line: #27343c;
    --accent: #52b9bf; --accent-ink: #05272a; --accent-soft: #17333a; --mark: #5f4a0e; --mark-strong: #8a6a12;
    --mark-done: #1f2f29; --danger: #f2796c; --ok: #62c58f; --code-bg: #1a242a; --shadow: 0 8px 28px rgba(0, 0, 0, .5);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #0f1519; --surface: #151d22; --ink: #e2e8ec; --muted: #93a3ad; --line: #27343c;
  --accent: #52b9bf; --accent-ink: #05272a; --accent-soft: #17333a; --mark: #5f4a0e; --mark-strong: #8a6a12;
  --mark-done: #1f2f29; --danger: #f2796c; --ok: #62c58f; --code-bg: #1a242a; --shadow: 0 8px 28px rgba(0, 0, 0, .5);
  color-scheme: dark;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-padding-top: calc(var(--top) + 16px); }
body { background: var(--paper); color: var(--ink); font: 15px/1.6 var(--f-body); }
a { color: var(--accent); text-underline-offset: 2px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
button { font: inherit; color: inherit; cursor: pointer; }

/* Top bar */
.top { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 30; height: var(--top); display: flex; align-items: center; gap: 12px;
  padding-inline: 16px; background: var(--surface); border-bottom: 1px solid var(--line); }
.brand { font: 700 16px/1 var(--f-display); letter-spacing: .01em; white-space: nowrap; }
.brand small { font: 500 12px/1 var(--f-body); color: var(--muted); margin-left: 8px; letter-spacing: 0; }
.top .spacer { flex: 1; }
.db-state { font-size: 12px; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; min-width: 0; }
.btn { border: 1px solid var(--line); background: var(--surface); border-radius: 6px; padding: 6px 12px; font-size: 13px; font-weight: 500;
  display: inline-flex; align-items: center; gap: 6px; white-space: nowrap; }
.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.danger { color: var(--danger); }
.btn[disabled] { opacity: .5; cursor: default; }
.pill { font: 600 11px/1 var(--f-body); padding: 3px 7px; border-radius: 999px; background: var(--accent-soft); color: var(--accent); font-variant-numeric: tabular-nums; }
#navToggle { display: none; }

/* Shell */
.shell { display: grid; grid-template-columns: var(--rail) minmax(0, 1fr); }
.shell.ledger-open { grid-template-columns: var(--rail) minmax(0, 1fr) var(--ledger); }
.rail { position: sticky; top: calc(var(--top) + env(safe-area-inset-top, 0px)); height: calc(100dvh - var(--top)); overflow-y: auto;
  border-right: 1px solid var(--line); padding-block: 16px; background: var(--paper); }
.rail h2 { font: 600 11px/1 var(--f-body); text-transform: uppercase; letter-spacing: .08em; color: var(--muted); margin: 0 16px 8px; }
.nav-doc { display: grid; grid-template-columns: 30px 1fr auto; align-items: center; gap: 4px; padding: 6px 12px 6px 16px; color: var(--ink);
  text-decoration: none; font-size: 14px; border-left: 3px solid transparent; }
.nav-doc.sub { padding-left: 30px; font-size: 13px; color: var(--muted); }
.nav-doc:hover { background: var(--accent-soft); }
.nav-doc.active { border-left-color: var(--accent); background: var(--accent-soft); color: var(--ink); font-weight: 500; }
.nav-no { font: 500 12px/1 var(--f-mono); color: var(--muted); }
.nav-label { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.rail .rev { margin: 20px 16px 0; font-size: 12px; color: var(--muted); line-height: 1.5; }

main { min-width: 0; padding: 24px 16px 96px; }
.hint { max-width: 880px; margin: 0 auto 24px; font-size: 13px; color: var(--muted);
  border: 1px dashed var(--line); border-radius: 8px; padding: 10px 14px; background: var(--surface); }
.hint mark { background: var(--mark); color: var(--ink); padding: 0 3px; border-radius: 2px; }

.doc { max-width: 880px; margin: 0 auto 56px; }
.doc-head { border-top: 3px solid var(--ink); padding-top: 14px; margin-bottom: 8px; display: grid; gap: 4px; }
.doc-no { font: 600 12px/1 var(--f-mono); letter-spacing: .06em; text-transform: uppercase; color: var(--accent); }
.doc-head h1 { font: 700 clamp(24px, 3.2vw, 32px)/1.2 var(--f-display); margin: 0; text-wrap: balance; letter-spacing: -.01em; }
.doc-src { font: 400 12px/1.4 var(--f-mono); color: var(--muted); overflow-wrap: anywhere; }
.doc-body { min-width: 0; }
.doc-body h2 { font: 600 22px/1.3 var(--f-display); margin: 36px 0 10px; text-wrap: balance; }
.doc-body h3 { font: 600 18px/1.35 var(--f-display); margin: 28px 0 8px; text-wrap: balance; }
.doc-body h4 { font: 600 15px/1.4 var(--f-display); margin: 22px 0 6px; }
.doc-body p, .doc-body li { max-width: 72ch; }
.doc-body ul, .doc-body ol { padding-left: 22px; }
.doc-body li { margin: 3px 0; }
.doc-body code { font: 13px/1.5 var(--f-mono); background: var(--code-bg); padding: 1px 4px; border-radius: 3px; overflow-wrap: anywhere; }
.doc-body pre.code { background: var(--code-bg); padding: 12px 14px; border-radius: 6px; overflow-x: auto; font: 13px/1.55 var(--f-mono); }
.doc-body pre.code code { background: none; padding: 0; overflow-wrap: normal; }
.doc-body blockquote { margin: 12px 0; padding: 4px 14px; border-left: 3px solid var(--line); color: var(--muted); }
.tbl { overflow-x: auto; margin: 14px 0; border: 1px solid var(--line); border-radius: 6px; background: var(--surface); }
.tbl table { border-collapse: collapse; width: 100%; font-size: 13.5px; line-height: 1.5; }
.tbl th { text-align: left; font-weight: 600; background: var(--code-bg); position: sticky; top: 0; }
.tbl th, .tbl td { padding: 7px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
.tbl tr:last-child td { border-bottom: 0; }
.tbl td code { font-size: 12px; }
.diagram { overflow-x: auto; margin: 16px 0; padding: 12px; background: var(--surface); border: 1px solid var(--line); border-radius: 6px; }
.raw-group h3 { font: 600 15px/1.3 var(--f-mono); }
.raw-group ul { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 6px 16px; }
.raw-size { color: var(--muted); font-size: 12px; font-variant-numeric: tabular-nums; }

/* Highlights */
mark.hl { background: var(--mark); color: inherit; border-radius: 2px; cursor: pointer; box-shadow: 0 1px 0 var(--mark-strong); }
mark.hl.done { background: var(--mark-done); box-shadow: none; }
mark.hl.pending { background: var(--accent-soft); box-shadow: 0 1px 0 var(--accent); cursor: default; }
mark.hl.flash { background: var(--mark-strong); }

/* Selection button and composer */
#selBtn { position: fixed; z-index: 40; box-shadow: var(--shadow); }
.composer { position: fixed; z-index: 45; width: min(380px, calc(100vw - 32px)); background: var(--surface); border: 1px solid var(--line);
  border-radius: 10px; box-shadow: var(--shadow); padding: 14px; display: grid; gap: 10px; }
.composer .q { font-size: 13px; color: var(--muted); border-left: 3px solid var(--mark-strong); padding-left: 10px; max-height: 6.2em; overflow: hidden;
  display: -webkit-box; -webkit-line-clamp: 4; -webkit-box-orient: vertical; }
.composer label { font: 600 12px/1 var(--f-body); color: var(--muted); }
.composer textarea { width: 100%; min-height: 96px; resize: vertical; font: 14px/1.5 var(--f-body); color: var(--ink); background: var(--paper);
  border: 1px solid var(--line); border-radius: 6px; padding: 8px 10px; }
.composer .row { display: flex; gap: 8px; align-items: center; justify-content: flex-end; flex-wrap: wrap; }
.composer .msg { font-size: 12px; color: var(--danger); margin-right: auto; }
.composer .meta { font-size: 12px; color: var(--muted); margin-right: auto; font-variant-numeric: tabular-nums; }

/* Ledger */
.ledger { position: sticky; top: calc(var(--top) + env(safe-area-inset-top, 0px)); height: calc(100dvh - var(--top)); overflow-y: auto;
  border-left: 1px solid var(--line); background: var(--surface); display: flex; flex-direction: column; }
.ledger-head { position: sticky; top: 0; background: var(--surface); padding: 14px 16px 10px; border-bottom: 1px solid var(--line); display: grid; gap: 10px; z-index: 1; }
.ledger-head h2 { margin: 0; font: 600 16px/1.2 var(--f-display); display: flex; align-items: center; gap: 8px; }
.ledger-head h2 .btn { margin-left: auto; padding: 4px 8px; }
.filters { display: flex; gap: 6px; flex-wrap: wrap; }
.chip { border: 1px solid var(--line); background: var(--paper); border-radius: 999px; padding: 3px 10px; font-size: 12px; }
.chip[aria-pressed="true"] { background: var(--ink); border-color: var(--ink); color: var(--paper); }
.ledger select { font: 13px var(--f-body); color: var(--ink); background: var(--paper); border: 1px solid var(--line); border-radius: 6px; padding: 5px 8px; width: 100%; }
.c-list { list-style: none; margin: 0; padding: 8px 0; }
.c-item { padding: 12px 16px; border-bottom: 1px solid var(--line); display: grid; gap: 7px; }
.c-item.focus { background: var(--accent-soft); }
.c-where { font: 500 11px/1.3 var(--f-mono); color: var(--accent); text-transform: uppercase; letter-spacing: .04em; overflow-wrap: anywhere; }
.c-quote { font-size: 13px; color: var(--muted); border-left: 3px solid var(--mark-strong); padding-left: 9px;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.c-item.done .c-quote { border-left-color: var(--line); }
.c-text { white-space: pre-wrap; overflow-wrap: anywhere; font-size: 14px; }
.c-meta { display: flex; align-items: center; gap: 8px; font-size: 12px; color: var(--muted); flex-wrap: wrap; }
.c-meta img { width: 18px; height: 18px; border-radius: 50%; }
.status { font: 600 11px/1 var(--f-body); padding: 3px 7px; border-radius: 999px; border: 1px solid currentColor; }
.status.open { color: var(--accent); }
.status.done { color: var(--ok); }
.status.lost { color: var(--danger); }
.c-reply { background: var(--paper); border: 1px solid var(--line); border-radius: 6px; padding: 8px 10px; font-size: 13.5px; white-space: pre-wrap; overflow-wrap: anywhere; }
.c-reply b { display: block; font: 600 11px/1.4 var(--f-body); text-transform: uppercase; letter-spacing: .06em; color: var(--muted); }
.c-actions { display: flex; gap: 6px; flex-wrap: wrap; }
.c-actions .btn { padding: 4px 9px; font-size: 12px; }
.empty { padding: 24px 16px; color: var(--muted); font-size: 14px; }

  background: var(--surface); color: var(--ink); box-shadow: var(--shadow); }
.srcref { border-bottom: 1px dotted var(--muted); cursor: help; }

@media (max-width: 1180px) {
  .shell.ledger-open { grid-template-columns: var(--rail) minmax(0, 1fr); }
  .ledger { position: fixed; right: 0; top: calc(var(--top) + env(safe-area-inset-top, 0px)); bottom: 0; height: auto; width: min(var(--ledger), 100vw);
    z-index: 35; box-shadow: var(--shadow); }
}
@media (max-width: 860px) {
  #navToggle { display: inline-flex; }
  .shell, .shell.ledger-open { grid-template-columns: minmax(0, 1fr); }
  .rail { position: fixed; left: 0; top: calc(var(--top) + env(safe-area-inset-top, 0px)); bottom: 0; height: auto; width: min(280px, 86vw);
    z-index: 36; box-shadow: var(--shadow); background: var(--surface); }
  .db-state { display: none; }
  .brand small { display: none; }
}
@media (prefers-reduced-motion: no-preference) {
  mark.hl, .c-item { transition: background-color .25s ease; }
}

/* Standalone page: what the artifact skeleton used to supply. */
html { color-scheme: light; }
body { margin: 0; }
img { max-width: 100%; }
.who { font-size: 13px; color: var(--muted); white-space: nowrap; }
.logout { margin: 0; }

dialog.raw { width: min(1100px, calc(100vw - 32px)); height: min(86dvh, 900px); padding: 0; border: 1px solid var(--line); border-radius: 10px;
  background: var(--surface); color: var(--ink); box-shadow: var(--shadow); }
dialog.raw::backdrop { background: rgba(10, 20, 26, .45); }
.raw-wrap { display: flex; flex-direction: column; height: 100%; }
.raw-bar { display: flex; align-items: center; gap: 10px; padding: 10px 14px; border-bottom: 1px solid var(--line); }
.raw-bar strong { font: 500 13px/1.3 var(--f-mono); overflow-wrap: anywhere; min-width: 0; flex: 1; }
.raw-wrap pre { margin: 0; flex: 1; overflow: auto; padding: 14px; font: 12.5px/1.55 var(--f-mono); background: var(--code-bg); }

.login-body { min-height: 100dvh; display: grid; place-items: center; padding-inline: 16px; }
.login { width: min(400px, 100%); display: grid; gap: 10px; padding-block: 32px; }
.login h1 { font: 700 30px/1.15 var(--f-display); margin: 0; letter-spacing: -.01em; }
.login-lead { color: var(--muted); margin: 0 0 8px; }
.login-msg { margin: 0; padding: 8px 12px; border: 1px solid var(--danger); color: var(--danger); border-radius: 6px; font-size: 14px; }
.login-form { display: grid; gap: 6px; }
.login-form label { font: 600 13px/1.2 var(--f-body); margin-top: 8px; }
.login-form input { font: 15px var(--f-body); color: var(--ink); background: var(--surface); border: 1px solid var(--line); border-radius: 6px; padding: 9px 11px; }
.login-form .btn { margin-top: 14px; justify-content: center; padding-block: 10px; font-size: 14px; }
.rail-logout { display: none; margin: 16px 16px 0; }
@media (max-width: 860px) {
  .who, .top .logout { display: none; }
  .rail-logout { display: block; }
  .top { gap: 8px; }
}
.doc-changed { font-size: 12px; color: var(--muted); overflow-wrap: anywhere; }
.doc-changed code { font: 11.5px var(--f-mono); }
.stale { position: sticky; top: calc(var(--top) + 8px + env(safe-area-inset-top, 0px)); z-index: 5; max-width: 880px; margin: 0 auto 16px;
  padding: 10px 14px; border-radius: 8px; background: var(--accent); color: var(--accent-ink); font-size: 14px; box-shadow: var(--shadow); }
.stale a { color: inherit; font-weight: 600; }