/* TARIN — site styles.
   Brand from the original TARIN (2021): the blue serif T on an ice-blue hexagon,
   the slate hex banner, and the black-and-navy chart cards. */

:root {
  color-scheme: light;
  --paper: #f5f7fa;
  --surface: #ffffff;
  --sunk: #edf1f6;
  --ink: #0e1420;
  --ink-2: #3c4859;
  --muted: #6b778a;
  --rule: #d9e0ea;
  --grid: #e6ebf2;
  --axis: #b9c3d0;
  --brand: #275aeb;        /* the T */
  --brand-ink: #1d47c4;    /* links on white, AA */
  --navy: #223a6c;         /* chart cards, 2021 */
  --ice-1: #bfdaf7;        /* hexagon, top */
  --ice-2: #a0e2f0;        /* hexagon, bottom */
  --mist: #b4c2cb;         /* banner */
  --band: #0b1220;         /* the black header band of the 2021 posts */
  --band-ink: #e9eef6;
  --band-muted: #8e9bb0;
  --s1: #275aeb;
  --s2: #e0762f;
  --s3: #1f9e89;
  --quiet-line: #c2ccd8;
  --tol: rgba(39, 90, 235, 0.12);
  --hold: #b42318;
  --hold-bg: #fcebe9;
  --warn: #8a5d00;
  --warn-bg: #f8efd9;
  --ok: #1a7a4c;
  --ok-bg: #e2f2e9;
  --f-display: "IBM Plex Serif", 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, "SF Mono", Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --paper: #0a0f18; --surface: #111928; --sunk: #172133;
    --ink: #e9eef6; --ink-2: #b6c1d1; --muted: #7c889c;
    --rule: #223049; --grid: #1a2539; --axis: #34435e;
    --brand: #5b86f5; --brand-ink: #7fa2f7; --navy: #9db4e8;
    --band: #05080e; --band-ink: #e9eef6; --band-muted: #7c889c;
    --s1: #5b86f5; --s2: #d9692a; --s3: #26a88f;
    --quiet-line: #34425a; --tol: rgba(91, 134, 245, 0.18);
    --hold: #f97066; --hold-bg: #3a1714; --warn: #e0a93a; --warn-bg: #332611;
    --ok: #62c08f; --ok-bg: #16281e;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --paper: #0a0f18; --surface: #111928; --sunk: #172133;
  --ink: #e9eef6; --ink-2: #b6c1d1; --muted: #7c889c;
  --rule: #223049; --grid: #1a2539; --axis: #34435e;
  --brand: #5b86f5; --brand-ink: #7fa2f7; --navy: #9db4e8;
  --band: #05080e; --band-ink: #e9eef6; --band-muted: #7c889c;
  --s1: #5b86f5; --s2: #d9692a; --s3: #26a88f;
  --quiet-line: #34425a; --tol: rgba(91, 134, 245, 0.18);
  --hold: #f97066; --hold-bg: #3a1714; --warn: #e0a93a; --warn-bg: #332611;
  --ok: #62c08f; --ok-bg: #16281e;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font-family: var(--f-body); font-size: 16px; line-height: 1.6;
}
.wrap { max-width: 1120px; margin: 0 auto; padding-inline: 20px; }
h1, h2, h3 { margin: 0; text-wrap: balance; }
h1, h2 { font-family: var(--f-display); font-weight: 600; letter-spacing: -0.01em; }
h3 { font-family: var(--f-body); font-weight: 600; }
p { margin: 0; }
a { color: var(--brand-ink); text-underline-offset: 3px; }
a:hover { color: var(--brand); }
:focus-visible { outline: 2px solid var(--brand); outline-offset: 3px; border-radius: 2px; }
code, .mono { font-family: var(--f-mono); font-size: 0.88em; }
.num { font-variant-numeric: tabular-nums; }
.eyebrow {
  font-family: var(--f-mono); font-size: 12px; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--brand-ink);
}
.muted { color: var(--muted); }
.read { max-width: 68ch; }

/* ---- header band ---- */
.band { background: var(--band); color: var(--band-ink); }
.band .wrap { display: flex; align-items: center; justify-content: space-between; gap: 12px 24px;
  flex-wrap: wrap; padding-block: 12px; }
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; color: var(--band-ink); }
.brand img, .brand svg { width: 34px; height: 34px; display: block; }
.brand .word { font-family: var(--f-body); font-weight: 500; font-size: 15px; letter-spacing: 0.5em;
  margin-right: -0.5em; }
.brand:hover { color: #fff; }
nav.main { display: flex; flex-wrap: wrap; gap: 2px 4px; }
nav.main a { color: var(--band-muted); text-decoration: none; font-size: 14px; padding: 6px 10px; border-radius: 4px; }
nav.main a:hover { color: var(--band-ink); background: rgba(255,255,255,0.06); }
nav.main a[aria-current="page"] { color: var(--band-ink); box-shadow: inset 0 -2px 0 var(--ice-2); border-radius: 0; }

/* ---- page scaffolding ---- */
.page-head { padding-block: 40px 28px; border-bottom: 1px solid var(--rule); display: grid; gap: 12px; }
.page-head h1 { font-size: clamp(28px, 4vw, 40px); line-height: 1.15; max-width: 24ch; }
.page-head .lede { color: var(--ink-2); max-width: 70ch; font-size: 17px; }
section.block { padding-block: 40px; border-bottom: 1px solid var(--rule); display: grid; gap: 18px; }
section.block:last-of-type { border-bottom: 0; }
section.block h2 { font-size: clamp(22px, 2.8vw, 28px); line-height: 1.2; }
.caption { font-family: var(--f-mono); font-size: 12px; color: var(--muted); line-height: 1.55; }
.caption b { color: var(--ink-2); font-weight: 500; }

/* ---- cards, pills, tables ---- */
.card { background: var(--surface); border: 1px solid var(--rule); border-radius: 6px; }
.pill { display: inline-block; font-family: var(--f-mono); font-size: 11px; line-height: 1.6; padding: 1px 8px;
  border-radius: 999px; white-space: nowrap; }
.pill.hold { color: var(--hold); background: var(--hold-bg); }
.pill.warn { color: var(--warn); background: var(--warn-bg); }
.pill.ok { color: var(--ok); background: var(--ok-bg); }
.pill.idle { color: var(--muted); background: var(--sunk); }
.tbl-wrap { overflow-x: auto; }
table.data { border-collapse: collapse; width: 100%; font-variant-numeric: tabular-nums; }
table.data th, table.data td { text-align: left; padding: 7px 14px 7px 0; border-bottom: 1px solid var(--grid); vertical-align: top; }
table.data th { font-family: var(--f-mono); font-size: 11px; font-weight: 400; color: var(--muted);
  text-transform: uppercase; letter-spacing: 0.06em; white-space: nowrap; }
table.data td { font-size: 14.5px; color: var(--ink-2); line-height: 1.45; }
table.data td.r, table.data th.r { text-align: right; }
table.data td.m { font-family: var(--f-mono); font-size: 13px; white-space: nowrap; }
table.data code { color: var(--ink); }
details > summary { cursor: pointer; font-family: var(--f-mono); font-size: 12px; color: var(--muted); padding-block: 4px; }

/* ---- charts ---- */
.chart { position: relative; background: var(--surface); border: 1px solid var(--rule); border-radius: 6px; padding: 14px 12px 8px; }
.chart svg { display: block; width: 100%; height: auto; overflow: visible; }
.chart text { font-family: var(--f-mono); font-size: 11px; fill: var(--muted); }
.chart .lbl { fill: var(--ink-2); font-size: 12px; }
.chart .lbl-strong { fill: var(--ink); font-size: 12px; font-weight: 500; }
.legend { display: flex; flex-wrap: wrap; gap: 6px 18px; font-family: var(--f-mono); font-size: 12px; color: var(--ink-2); padding: 0 6px 10px; }
.legend span { display: inline-flex; align-items: center; gap: 7px; }
.key-line { width: 16px; height: 2px; border-radius: 1px; display: inline-block; }
.key-dot { width: 9px; height: 9px; border-radius: 50%; display: inline-block; }
.key-band { width: 16px; height: 10px; display: inline-block; background: var(--tol); border-radius: 2px; }
.key-held { width: 2px; height: 10px; display: inline-block; background: var(--hold); }
.tip { position: absolute; pointer-events: none; z-index: 5; background: var(--surface); border: 1px solid var(--rule);
  border-radius: 6px; box-shadow: 0 6px 20px rgba(0,0,0,0.12); padding: 8px 10px; font-family: var(--f-mono);
  font-size: 12px; line-height: 1.45; color: var(--ink-2); min-width: 160px; max-width: 300px; }
.tip .t-date { color: var(--muted); margin-bottom: 4px; }
.tip .t-row { display: flex; align-items: center; gap: 10px; justify-content: space-between; }
.tip .t-row .k { display: inline-flex; align-items: center; gap: 6px; }
.tip .t-row strong { color: var(--ink); font-weight: 500; }
.tip .t-note { color: var(--hold); margin-top: 3px; }

/* ---- footer ---- */
footer.site { border-top: 1px solid var(--rule); margin-top: 24px; }
footer.site .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px;
  padding-block: 22px 40px; font-family: var(--f-mono); font-size: 12px; color: var(--muted); }

/* ---- theme switch (in the header band) ---- */
.theme-btn { display: inline-flex; align-items: center; justify-content: center; width: 32px; height: 32px; flex: none;
  border: 1px solid rgba(255,255,255,0.14); border-radius: 6px; background: transparent; color: var(--band-muted); cursor: pointer; padding: 0; }
.theme-btn:hover { color: var(--band-ink); background: rgba(255,255,255,0.06); }
.theme-btn svg { width: 16px; height: 16px; }
.band .wrap .tools { display: flex; align-items: center; gap: 8px; }

/* ---- "in short" box: the page's findings, each linking to its section ---- */
.inshort { border-left: 3px solid var(--brand); padding: 14px 18px; display: grid; gap: 8px; }
.inshort .eyebrow { margin-bottom: 2px; }
.inshort ol { margin: 0; padding-left: 20px; display: grid; gap: 6px; }
.inshort li { color: var(--ink-2); }
.inshort a { color: var(--ink); text-decoration-color: var(--rule); }
.inshort a:hover { color: var(--brand-ink); text-decoration-color: currentColor; }

/* ---- what's new (home) ---- */
.news { display: grid; gap: 4px; font-size: 14px; color: var(--ink-2); }
.news .eyebrow { font-size: 11px; }
.news ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 3px; }
.news li .d { font-family: var(--f-mono); font-size: 12px; color: var(--muted); margin-right: 8px; }

/* ---- contents list on long pages ---- */
nav.toc { display: flex; flex-wrap: wrap; gap: 6px 8px; padding-block: 16px 4px; font-family: var(--f-mono); font-size: 12px; }
nav.toc span { color: var(--muted); padding: 3px 0; margin-right: 4px; }
nav.toc a { color: var(--ink-2); text-decoration: none; border: 1px solid var(--rule); border-radius: 999px; padding: 3px 10px; background: var(--surface); }
nav.toc a:hover { border-color: var(--brand); color: var(--brand-ink); }
.more-btn { justify-self: start; font-family: var(--f-mono); font-size: 12px; color: var(--ink-2); background: var(--surface);
  border: 1px solid var(--rule); border-radius: 999px; padding: 4px 12px; cursor: pointer; }
.more-btn:hover { border-color: var(--brand); color: var(--brand-ink); }

@media (max-width: 760px) {
  /* the nav becomes one row that scrolls sideways, under the logo */
  .band .wrap { padding-bottom: 6px; }
  .band .wrap .tools { order: 2; margin-left: auto; }
  nav.main { order: 3; flex-wrap: nowrap; overflow-x: auto; width: 100%; margin-inline: -8px; padding-bottom: 4px;
    scrollbar-width: none; -webkit-overflow-scrolling: touch; }
  nav.main::-webkit-scrollbar { display: none; }
  nav.main a { white-space: nowrap; flex: none; }
  /* tables marked .stack become one card per row; cells carry their column name in data-l */
  table.data.stack thead { display: none; }
  table.data.stack tr { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px 14px; padding: 12px 0; border-bottom: 1px solid var(--grid); }
  table.data.stack td { border: 0; padding: 0; text-align: left; white-space: normal; overflow-wrap: anywhere; }
  table.data.stack td:first-child { grid-column: 1 / -1; font-weight: 600; color: var(--ink); }
  table.data.stack td[data-l]::before { content: attr(data-l); display: block; font-family: var(--f-mono); font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.06em; }
  table.data.stack td.wide { grid-column: 1 / -1; }
  table.data.stack td .pill { white-space: normal; border-radius: 8px; }
}
@media (max-width: 600px) {
  .wrap { padding-inline: 16px; }
  .brand .word { letter-spacing: 0.35em; margin-right: -0.35em; }
  nav.main a { padding: 6px 8px; }
  .page-head { padding-block: 28px 22px; }
  section.block { padding-block: 30px; }
}
@media (prefers-reduced-motion: no-preference) {
  a, nav.main a { transition: color .12s, background .12s; }
}