/* HTML Charts – site styles.
   Idea: the grid is the raw material. Pages sit on faint graph paper, ink is a deep navy,
   and the chart violet only appears where something is drawn or clickable. */
:root {
  --paper: #F7F8FB;
  --sheet: #FFFFFF;
  --ink: #1B2238;
  --ink-2: #3D4562;
  --muted: #6A7290;
  --rule: #E3E7F0;
  --rule-2: #EEF1F6;
  --violet: #6D4AFF;
  --violet-2: #EFEBFF;
  --teal: #0F9D8A;
  --amber: #E8A317;
  --red: #D9434A;
  --code: #1B2238;
  --code-ink: #E7EAF4;
  --r-lg: 14px;
  --r-md: 10px;
  --r-sm: 7px;
  --display: "Bricolage Grotesque", "IBM Plex Sans", system-ui, sans-serif;
  --body: "IBM Plex Sans", "Segoe UI", system-ui, -apple-system, sans-serif;
  --mono: "IBM Plex Mono", Consolas, Menlo, monospace;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0; color: var(--ink); font-family: var(--body); font-size: 15.5px; line-height: 1.6;
  background-color: var(--paper);
  background-image: linear-gradient(var(--rule-2) 1px, transparent 1px), linear-gradient(90deg, var(--rule-2) 1px, transparent 1px);
  background-size: 28px 28px;
}
a { color: var(--violet); text-decoration: none; text-underline-offset: 3px; }
a:hover { text-decoration: underline; }
:focus-visible { outline: 2.5px solid var(--violet); outline-offset: 2px; border-radius: 4px; }
code, pre { font-family: var(--mono); }
code { font-size: .86em; background: var(--violet-2); color: #3B2A9E; border-radius: 5px; padding: 1px 6px; }
h1, h2, h3 { font-family: var(--display); color: var(--ink); }
h1 { font-size: clamp(32px, 5vw, 54px); line-height: 1.04; letter-spacing: -.035em; font-weight: 750; margin: 0 0 16px; max-width: 16ch; }
h2 { font-size: clamp(22px, 2.6vw, 28px); letter-spacing: -.02em; font-weight: 700; margin: 64px 0 14px; }
h3 { font-size: 17px; letter-spacing: -.01em; font-weight: 650; margin: 0 0 6px; }
.lede { font-size: 18px; color: var(--ink-2); max-width: 60ch; margin: 0; }
.muted { color: var(--muted); }
.small { font-size: 14px; }
.eyebrow { font-size: 14px; font-weight: 600; color: var(--violet); margin-bottom: 8px; }

/* ---------- header ---------- */
header.top { position: sticky; top: 0; z-index: 50; background: rgba(247, 248, 251, .88); backdrop-filter: blur(10px); border-bottom: 1px solid var(--rule); }
header.top .in { max-width: 1180px; margin: 0 auto; padding: 12px 24px; display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); font-family: var(--display); font-weight: 750; font-size: 18px; letter-spacing: -.02em; }
.brand:hover { text-decoration: none; }
.brand .mark { width: 28px; height: 28px; border-radius: 8px; background: var(--ink); display: grid; place-items: center; }
.brand .mark span { display: flex; align-items: flex-end; height: 14px; }
.brand .mark i { display: block; width: 4px; background: var(--violet); border-radius: 2px; margin: 0 1px; }
.nav { display: flex; gap: 2px; flex-wrap: wrap; margin-left: auto; }
.nav a { color: var(--ink-2); font-size: 14.5px; font-weight: 500; padding: 7px 12px; border-radius: 8px; }
.nav a:hover { background: var(--sheet); text-decoration: none; }
.nav a.on { color: var(--ink); font-weight: 600; }
.nav a.me { color: var(--violet); font-weight: 600; }

/* ---------- layout ---------- */
main { max-width: 1180px; margin: 0 auto; padding: 36px 24px 72px; }
.hero { padding: 24px 0 8px; }
.crumbs { font-size: 14px; color: var(--muted); margin-bottom: 18px; }

/* home hero: a grid whose value cells grow into bars */
.hero.home { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr); gap: 48px; align-items: center; padding: 40px 0 24px; }
.hero-cta { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 26px; }
.btn { display: inline-block; font-weight: 600; font-size: 15px; padding: 11px 18px; border-radius: var(--r-md); background: var(--ink); color: #fff; }
.btn:hover { text-decoration: none; background: #2A3456; }
.btn.ghost { background: var(--sheet); color: var(--ink); border: 1px solid var(--rule); }
.btn.ghost:hover { border-color: var(--ink-2); }
.morph { margin: 0; background: var(--sheet); border: 1px solid var(--rule); border-radius: var(--r-lg); padding: 18px 20px 14px; box-shadow: 0 18px 50px -24px rgba(27, 34, 56, .35); }
.morph table { width: 100%; border-collapse: collapse; font-size: 13.5px; font-variant-numeric: tabular-nums; }
.morph th { text-align: left; font-weight: 600; color: var(--muted); font-size: 12.5px; padding: 0 8px 8px 0; border-bottom: 1px solid var(--rule); }
.morph td { padding: 7px 8px 7px 0; border-bottom: 1px solid var(--rule-2); white-space: nowrap; }
.morph td.v { text-align: right; width: 72px; color: var(--ink-2); }
.morph td.b { width: 60%; padding-left: 14px; }
.morph td.b i { display: block; height: 14px; border-radius: 4px; background: var(--violet); width: var(--w); transform-origin: left; animation: grow .9s cubic-bezier(.2, .8, .2, 1) both; animation-delay: calc(var(--d) * 90ms + 250ms); }
.morph tr.hi td.b i { background: var(--teal); }
.morph figcaption { font-size: 13px; color: var(--muted); margin-top: 10px; }
@keyframes grow { from { transform: scaleX(0); opacity: .3; } to { transform: scaleX(1); opacity: 1; } }
@media (prefers-reduced-motion: reduce) { .morph td.b i { animation: none; } }

/* ---------- home ---------- */
.steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; margin-top: 40px; background: var(--sheet); border: 1px solid var(--rule); border-radius: var(--r-lg); }
.step { padding: 22px 24px; }
.step + .step { border-left: 1px solid var(--rule); }
.step .n { font-family: var(--display); font-size: 30px; font-weight: 750; color: var(--violet); line-height: 1; margin-bottom: 10px; }
.step p { margin: 0; color: var(--ink-2); font-size: 15px; }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(290px, 1fr)); gap: 16px; margin-top: 18px; }
.card { background: var(--sheet); border: 1px solid var(--rule); border-radius: var(--r-lg); overflow: hidden; display: flex; flex-direction: column; color: var(--ink); transition: border-color .15s; }
.card:hover { border-color: var(--violet); text-decoration: none; }
.card[hidden] { display: none; }
.card .thumb { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; object-position: top; background: var(--rule-2); border-bottom: 1px solid var(--rule); }
.card .body { padding: 16px 18px 18px; display: flex; flex-direction: column; gap: 6px; flex: 1; }
.card .body p { margin: 0; color: var(--ink-2); font-size: 14.5px; }
.card .spec { display: flex; flex-wrap: wrap; gap: 5px; }
.card .spec span, .tag { font-size: 12px; font-weight: 600; color: var(--ink-2); background: var(--rule-2); border-radius: 6px; padding: 2px 8px; }
.card .spec span.m { background: var(--violet-2); color: #3B2A9E; }
.tags { display: flex; gap: 5px; flex-wrap: wrap; margin-top: auto; padding-top: 8px; }
.tags .tag { background: transparent; border: 1px solid var(--rule); color: var(--muted); }
.card .go { display: none; }
.trust { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 28px; margin-top: 14px; }
.trust div { border-top: 3px solid var(--teal); padding-top: 12px; }
.trust p { margin: 4px 0 0; font-size: 15px; color: var(--ink-2); }
.noresult { color: var(--muted); }

/* filters */
.filters { display: flex; flex-direction: column; gap: 10px; background: var(--sheet); border: 1px solid var(--rule); border-radius: var(--r-lg); padding: 16px 18px; margin-top: 12px; }
.fsearch { font: inherit; font-size: 15px; padding: 10px 14px; border: 1px solid var(--rule); border-radius: var(--r-md); outline: none; background: var(--paper); color: var(--ink); }
.fsearch:focus { border-color: var(--violet); background: #fff; }
.frow { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.flbl { font-size: 14px; font-weight: 600; color: var(--muted); width: 112px; flex: none; }
.chip { all: unset; cursor: pointer; font-size: 13.5px; font-weight: 500; color: var(--ink-2); border: 1px solid var(--rule); border-radius: var(--r-sm); padding: 4px 11px; background: var(--sheet); }
.chip:hover { border-color: var(--ink-2); }
.chip:focus-visible { outline: 2.5px solid var(--violet); outline-offset: 2px; }
.chip.on { background: var(--ink); border-color: var(--ink); color: #fff; }
.fcount { font-size: 14px; color: var(--muted); }

.faqs { display: grid; gap: 0; margin-top: 10px; background: var(--sheet); border: 1px solid var(--rule); border-radius: var(--r-lg); }
.faq { padding: 14px 20px; }
.faq + .faq { border-top: 1px solid var(--rule); }
.faq summary { cursor: pointer; font-weight: 600; }
.faq p { margin: 8px 0 0; color: var(--ink-2); font-size: 15px; max-width: 75ch; }
.author { display: flex; gap: 18px; align-items: flex-start; margin-top: 64px; padding-top: 28px; border-top: 1px solid var(--rule); }
.author .av { flex: none; width: 52px; height: 52px; border-radius: 50%; background: var(--ink); color: #fff; display: grid; place-items: center; font-family: var(--display); font-weight: 750; }
.author p { margin: 4px 0 0; color: var(--ink-2); max-width: 65ch; }
.cta { display: inline-block; margin: 10px 8px 0 0; background: var(--ink); color: #fff; font-weight: 600; font-size: 14.5px; border-radius: var(--r-md); padding: 9px 15px; }
.cta:hover { text-decoration: none; background: #2A3456; }
.cta.ghost { background: var(--sheet); color: var(--ink); border: 1px solid var(--rule); }

/* ---------- chart page ---------- */
.pillrow { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 16px; }
.pill { font-size: 13px; font-weight: 600; border-radius: var(--r-sm); padding: 3px 10px; background: var(--sheet); border: 1px solid var(--rule); color: var(--ink-2); }
.pill.mock { background: #FFF6DF; border-color: #F3DDA0; color: #7A5300; }
.demo { margin-top: 26px; background: var(--ink); border-radius: 18px; padding: 14px; }
.demo .label { display: flex; justify-content: space-between; align-items: center; gap: 10px; flex-wrap: wrap; font-size: 14px; color: #C9CEE0; padding: 2px 4px 12px; }
.demo .frame { background: #fff; border-radius: 12px; overflow: hidden; }
.shuffle { all: unset; cursor: pointer; font-size: 14px; font-weight: 600; color: var(--ink); background: #fff; border-radius: 8px; padding: 6px 13px; white-space: nowrap; }
.shuffle:hover { background: var(--violet-2); }
.shuffle:focus-visible { outline: 2.5px solid #fff; outline-offset: 2px; }
.shuffle.spin { animation: shuf .45s ease; }
@keyframes shuf { 50% { transform: scale(.94); } }
.gridbox { margin-top: 12px; background: #fff; border-radius: 12px; overflow: hidden; }
.gridbox .head { padding: 10px 14px; font-size: 13.5px; font-weight: 600; color: var(--muted); border-bottom: 1px solid var(--rule); display: flex; justify-content: space-between; gap: 10px; flex-wrap: wrap; }
.gridscroll { max-height: 320px; overflow: auto; }
table.mock { border-collapse: collapse; font-size: 12.5px; width: 100%; font-variant-numeric: tabular-nums; font-family: var(--body); }
table.mock th { text-align: left; font-weight: 600; color: var(--ink); padding: 8px 10px; border-bottom: 1px solid var(--rule); white-space: nowrap; background: #fff; vertical-align: top; }
table.mock td { padding: 5px 10px; border-bottom: 1px solid var(--rule-2); white-space: nowrap; color: var(--ink-2); }
table.mock td.n, table.mock th.n { text-align: right; }

.cols { width: 100%; border-collapse: collapse; font-size: 15px; margin-top: 8px; background: var(--sheet); border: 1px solid var(--rule); border-radius: var(--r-lg); overflow: hidden; }
.cols th, .cols td { text-align: left; padding: 11px 14px; border-bottom: 1px solid var(--rule); vertical-align: top; }
.cols th { font-size: 13.5px; font-weight: 600; color: var(--muted); background: var(--paper); }
.cols tr:last-child td { border-bottom: 0; }
.req { font-size: 12px; font-weight: 700; color: #3B2A9E; background: var(--violet-2); border-radius: 6px; padding: 2px 8px; white-space: nowrap; }
.opt { font-size: 12px; font-weight: 600; color: var(--muted); background: var(--rule-2); border-radius: 6px; padding: 2px 8px; white-space: nowrap; }
.usage { display: grid; grid-template-columns: minmax(0, 1fr); gap: 16px; }
ol.how { margin: 6px 0 0; padding-left: 22px; color: var(--ink-2); max-width: 78ch; }
ol.how li { margin: 6px 0; }
.code { position: relative; background: var(--code); color: var(--code-ink); border-radius: var(--r-lg); overflow: hidden; }
.code pre { margin: 0; padding: 16px 18px; overflow-x: auto; font-size: 13px; line-height: 1.6; }
.code .bar { display: flex; justify-content: space-between; align-items: center; padding: 9px 10px 9px 18px; background: #252E4A; font-size: 13.5px; color: #B9C0D9; }
.copy { all: unset; cursor: pointer; font-size: 13px; font-weight: 600; color: var(--ink); background: #fff; border-radius: 7px; padding: 5px 12px; }
.copy:hover { background: var(--violet-2); }
.copy:focus-visible { outline: 2.5px solid #fff; outline-offset: 2px; }
.copy.done { background: #CFF3EA; color: #0B6B5E; }
.kv { display: grid; grid-template-columns: max-content minmax(0, 1fr); gap: 8px 18px; font-size: 14px; margin-top: 4px; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; word-break: break-all; }
.features { columns: 2 320px; column-gap: 32px; padding-left: 20px; color: var(--ink-2); margin: 6px 0 0; }
.features li { margin: 0 0 8px; break-inside: avoid; }
.note { background: var(--sheet); border: 1px solid var(--rule); border-left: 4px solid var(--violet); border-radius: var(--r-md); padding: 13px 18px; color: var(--ink-2); font-size: 15px; margin-top: 16px; }
.byline { margin-top: 40px; color: var(--ink-2); font-size: 15px; }
.more { display: grid; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); gap: 10px; }
.more a { display: flex; flex-direction: column; gap: 2px; background: var(--sheet); border: 1px solid var(--rule); border-radius: var(--r-md); padding: 12px 14px; color: var(--ink); font-size: 15px; }
.more a:hover { border-color: var(--violet); text-decoration: none; }
.more a span { font-size: 13px; color: var(--muted); }
.more a.here { border-color: var(--violet); background: var(--violet-2); }

/* ---------- setup guide ---------- */
.fit { font-size: 12.5px; font-weight: 700; border-radius: 6px; padding: 2px 9px; white-space: nowrap; }
.fit.ok { background: #DDF5EF; color: #0B6B5E; } .fit.mid { background: #FFF1D2; color: #7A5300; } .fit.no { background: #FCE3E4; color: #A3262C; }
.tabs { margin-top: 14px; background: var(--sheet); border: 1px solid var(--rule); border-radius: var(--r-lg); overflow: hidden; }
.tablist { display: flex; flex-wrap: wrap; gap: 0; border-bottom: 1px solid var(--rule); background: var(--paper); }
.tablist button { all: unset; cursor: pointer; padding: 12px 18px; font-weight: 600; font-size: 14.5px; color: var(--muted); border-right: 1px solid var(--rule); display: flex; gap: 8px; align-items: center; }
.tablist button[aria-selected="true"] { background: var(--sheet); color: var(--ink); box-shadow: inset 0 -3px 0 var(--violet); }
.tablist button:focus-visible { outline: 2.5px solid var(--violet); outline-offset: -3px; }
.tablist .dot { width: 8px; height: 8px; border-radius: 50%; }
.tablist .dot.ok { background: var(--teal); } .tablist .dot.mid { background: var(--amber); } .tablist .dot.no { background: var(--red); }
.tabpanel { padding: 22px 24px 24px; }
.tabpanel[hidden] { display: none; }
.tabpanel > p:first-child { margin-top: 0; }
.tabpanel .code { margin-top: 14px; }

/* snippet builder */
.builder { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 0; margin-top: 14px; background: var(--sheet); border: 1px solid var(--rule); border-radius: var(--r-lg); overflow: hidden; }
.builder .form { padding: 20px 22px; display: flex; flex-direction: column; gap: 16px; border-right: 1px solid var(--rule); }
.builder .out { padding: 20px 22px; background: var(--paper); display: flex; flex-direction: column; gap: 12px; }
.builder label.f { display: flex; flex-direction: column; gap: 5px; font-size: 14px; font-weight: 600; color: var(--ink-2); }
.builder select, .builder input[type=text], .builder input[type=number] { font: inherit; font-size: 14.5px; font-weight: 400; padding: 8px 11px; border: 1px solid var(--rule); border-radius: var(--r-sm); background: #fff; color: var(--ink); width: 100%; }
.builder select:focus, .builder input:focus { outline: none; border-color: var(--violet); box-shadow: 0 0 0 3px var(--violet-2); }
.builder .row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.builder table.map { width: 100%; border-collapse: collapse; font-size: 14px; }
.builder table.map th { text-align: left; font-size: 13px; font-weight: 600; color: var(--muted); padding: 0 6px 6px 0; }
.builder table.map td { padding: 4px 6px 4px 0; vertical-align: middle; }
.builder table.map td:first-child { white-space: nowrap; width: 1%; }
.builder fieldset { border: 1px solid var(--rule); border-radius: var(--r-md); padding: 10px 14px 12px; margin: 0; }
.builder legend { font-size: 14px; font-weight: 600; color: var(--ink-2); padding: 0 6px; }
.builder .checks { display: flex; flex-wrap: wrap; gap: 6px 14px; font-size: 14px; }
.builder .checks label { display: flex; gap: 6px; align-items: center; }
.builder .hint { font-size: 13.5px; color: var(--muted); font-weight: 400; margin: 0; }
.builder .changes { margin: 0; padding-left: 18px; font-size: 14px; color: var(--ink-2); }
.attrs td code { white-space: nowrap; }

footer { border-top: 1px solid var(--rule); background: var(--sheet); }
footer .in { max-width: 1180px; margin: 0 auto; padding: 24px 24px 36px; font-size: 14px; color: var(--muted); display: flex; gap: 14px; justify-content: space-between; flex-wrap: wrap; }

@media (max-width: 860px) {
  .hero.home { grid-template-columns: 1fr; gap: 28px; }
  .builder { grid-template-columns: 1fr; }
  .builder .form { border-right: 0; border-bottom: 1px solid var(--rule); }
}
@media (max-width: 640px) {
  main { padding: 22px 16px 56px; }
  header.top .in { padding: 10px 16px; }
  .nav { margin-left: 0; }
  .steps { grid-template-columns: 1fr; }
  .step + .step { border-left: 0; border-top: 1px solid var(--rule); }
  .kv { grid-template-columns: minmax(0, 1fr); gap: 2px 0; }
  .kv dd { margin-bottom: 8px; }
  .flbl { width: 100%; }
  .builder .row2 { grid-template-columns: 1fr; }
  .tabpanel { padding: 18px 16px; }
}