/* CXCAP site. "Call before you dig": asphalt ground, locate-paint marks.
   Paint colors carry meaning only: white dashed = the spot you'll change,
   yellow = direct importers, blue = reach, orange = cycles. */

:root,
[data-theme="dark"] {
  --bg: #16181b;          /* asphalt */
  --bg-raised: #1d2024;
  --bg-sunk: #111316;
  --line: #3a3f46;
  --line-soft: #2a2e33;
  --fg: #eeefeb;          /* 15.9:1 on bg */
  --fg-muted: #b9bec4;    /* 9.6:1 on bg */
  --dig: #f4f4f0;         /* white marking: the proposed change */
  --flag: #ffd23f;        /* locate yellow: direct importers */
  --reach: #7cc4ff;       /* water blue: transitive reach */
  --cycle: #ff9d57;       /* comms orange: cycles */
  --link: #ffd23f;        /* 12.6:1 on bg */
  --btn-bg: #ffd23f;
  --btn-fg: #16181b;
  --code-bg: #0f1113;
  --focus: #7cc4ff;
  --shadow: 0 1px 0 rgba(255, 255, 255, 0.04) inset;
  color-scheme: dark;
}

[data-theme="light"] {
  --bg: #eceee9;          /* concrete */
  --bg-raised: #f8f9f6;
  --bg-sunk: #e1e4de;
  --line: #b9bdb5;
  --line-soft: #d3d6cf;
  --fg: #16181b;          /* 15.6:1 on bg */
  --fg-muted: #43484e;    /* 7.9:1 on bg */
  --dig: #16181b;
  --flag: #7a5a00;        /* locate yellow, darkened: 5.5:1 on bg (large text AAA) */
  --reach: #1f63ad;
  --cycle: #9e4400;        /* 5.5:1 on bg */
  --link: #5c4300;        /* 8.5:1 on bg */
  --btn-bg: #16181b;
  --btn-fg: #f8f9f6;
  --code-bg: #f8f9f6;
  --focus: #1f63ad;
  --shadow: 0 1px 2px rgba(22, 24, 27, 0.06);
  color-scheme: light;
}

*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: "Atkinson Hyperlegible", system-ui, sans-serif;
  font-size: 1.125rem;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
}

img, svg { display: block; max-width: 100%; }

a { color: var(--link); text-underline-offset: 0.18em; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }

:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; border-radius: 4px; }

code, pre, .output { font-family: "IBM Plex Mono", ui-monospace, monospace; }
code { font-size: 0.9em; }
p code, li code, .tip code { background: var(--bg-sunk); padding: 0.08em 0.35em; border-radius: 4px; }

.wrap { width: min(100% - 2.5rem, 72rem); margin-inline: auto; }

.skip {
  position: absolute; left: 1rem; top: -4rem; z-index: 10;
  background: var(--btn-bg); color: var(--btn-fg); padding: 0.6rem 1rem; border-radius: 6px; font-weight: 700;
}
.skip:focus { top: 1rem; }

.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ---------- type ---------- */

h1, h2 {
  font-family: "Big Shoulders Display", "Arial Narrow", sans-serif;
  font-weight: 800;
  line-height: 0.98;
  letter-spacing: 0.005em;
  margin: 0;
  text-wrap: balance;
}
h1 { font-size: clamp(3rem, 7.2vw, 5.6rem); max-width: 11ch; }
h2 { font-size: clamp(2.2rem, 4.6vw, 3.6rem); max-width: 20ch; }
h3 { font-size: 1.2rem; line-height: 1.3; margin: 0 0 0.35rem; }
p { margin: 0 0 1rem; max-width: 62ch; }

.lede { font-size: clamp(1.2rem, 1.9vw, 1.4rem); color: var(--fg-muted); margin-top: 1.4rem; max-width: 34ch; }
.section__intro { color: var(--fg-muted); margin-top: 1rem; }
.fineprint { color: var(--fg-muted); font-size: 1rem; margin-top: 1.25rem; }

/* ---------- header ---------- */

.top {
  position: sticky; top: 0; z-index: 5;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line-soft);
}
.top__row { display: flex; align-items: center; gap: 1.5rem; min-height: 4rem; }
.brand {
  display: inline-flex; align-items: center; gap: 0.55rem;
  color: var(--fg); text-decoration: none;
  font-family: "Big Shoulders Display", sans-serif; font-weight: 800; font-size: 1.6rem; letter-spacing: 0.02em;
}
.brand__mark { width: 1.6rem; height: 1.6rem; color: var(--dig); }
.nav { display: flex; gap: 1.4rem; margin-left: auto; }
.nav a { color: var(--fg-muted); text-decoration: none; font-size: 1rem; }
.nav a:hover { color: var(--fg); }
.top__actions { display: flex; align-items: center; gap: 0.75rem; }

.theme {
  width: 2.5rem; height: 2.5rem; border-radius: 8px;
  border: 1px solid var(--line); background: transparent; color: var(--fg);
  display: grid; place-items: center; cursor: pointer;
}
.theme svg { width: 1.2rem; height: 1.2rem; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; grid-area: 1 / 1; transition: transform 0.35s ease, opacity 0.25s ease; }
.theme__moon { fill: currentColor; stroke: none; }
[data-theme="dark"] .theme__sun,
[data-theme="light"] .theme__moon { opacity: 0; transform: rotate(-60deg) scale(0.6); }
.theme:hover { border-color: var(--fg-muted); }

/* ---------- buttons ---------- */

.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  min-height: 3rem; padding: 0 1.3rem; border-radius: 8px;
  font-weight: 700; font-size: 1rem; text-decoration: none; cursor: pointer;
  border: 2px solid transparent;
  transition: transform 0.15s ease, background-color 0.15s ease, border-color 0.15s ease;
}
.btn:active { transform: translateY(1px); }
.btn--primary { background: var(--btn-bg); color: var(--btn-fg); }
.btn--primary:hover { filter: brightness(1.06); }
.btn--ghost { color: var(--fg); border-color: var(--line); }
.btn--ghost:hover { border-color: var(--fg-muted); }
.btn--small { min-height: 2.5rem; padding: 0 0.9rem; font-size: 0.95rem; }
.gh { width: 1.1rem; height: 1.1rem; fill: currentColor; }
.stars { color: var(--fg-muted); font-weight: 400; padding-left: 0.5rem; border-left: 1px solid var(--line); }

.linkbtn { background: none; border: 0; padding: 0.25rem 0; color: var(--link); font: inherit; text-decoration: underline; text-underline-offset: 0.18em; cursor: pointer; }

/* ---------- hero ---------- */

.hero { padding: clamp(3rem, 7vw, 6rem) 0 clamp(3.5rem, 7vw, 6rem); }
.hero__grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr); gap: clamp(2rem, 5vw, 4.5rem); align-items: start; }
.hero__ctas { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 1.5rem; }

.install { margin-top: 2rem; max-width: 36rem; }
.install__label { font-size: 0.95rem; color: var(--fg-muted); margin-bottom: 0.4rem; }
.install__box {
  display: flex; align-items: stretch;
  background: var(--code-bg); border: 1px solid var(--line); border-radius: 8px; box-shadow: var(--shadow);
}
.install__box code {
  flex: 1; padding: 0.85rem 1rem; font-size: 0.86rem; line-height: 1.55;
  white-space: pre-wrap; overflow-wrap: normal; background: none; border-radius: 0;
}
.copy {
  border: 0; border-left: 1px solid var(--line); background: transparent; color: var(--fg);
  padding: 0 1.1rem; font: 700 0.95rem "Atkinson Hyperlegible", sans-serif; cursor: pointer; min-width: 5.5rem;
  border-radius: 0 8px 8px 0;
}
.copy:hover { background: var(--bg-sunk); }
.copy[data-state="done"] { color: var(--link); }
.install__alt { margin-top: 0.6rem; font-size: 1rem; color: var(--fg-muted); }

/* the locate map */
.locate {
  margin: 0; border: 1px solid var(--line); border-radius: 12px; overflow: hidden;
  background:
    radial-gradient(circle at 50% 55%, color-mix(in srgb, var(--reach) 7%, transparent), transparent 62%),
    var(--bg-raised);
  box-shadow: var(--shadow);
}
.locate__head { padding: 0.8rem 1rem; border-bottom: 1px solid var(--line-soft); background: var(--code-bg); overflow-x: auto; }
.locate__cmd { font-size: 0.82rem; white-space: nowrap; background: none; padding: 0; }
.prompt { color: var(--link); user-select: none; margin-right: 0.4ch; }
.locate__stage { position: relative; }
.locate__map { width: 100%; height: auto; aspect-ratio: 6 / 5; }
.locate__readout {
  position: absolute; left: 1rem; bottom: 1rem;
  background: color-mix(in srgb, var(--bg-raised) 90%, transparent); backdrop-filter: blur(4px);
  border: 1px solid var(--line); border-radius: 8px; padding: 0.7rem 0.9rem;
}
.readout__verdict { font-family: "IBM Plex Mono", monospace; font-size: 0.85rem; color: var(--fg); margin: 0 0 0.35rem; }
.readout__line { font-size: 0.98rem; margin: 0; display: flex; align-items: center; gap: 0.5rem; color: var(--fg-muted); }
.readout__line strong { color: var(--fg); font-variant-numeric: tabular-nums; min-width: 3ch; text-align: right; }
.dot { width: 0.7rem; height: 0.7rem; border-radius: 50%; display: inline-block; flex: none; }
.dot--direct { background: var(--flag); }
.dot--reach { background: var(--reach); }
.locate figcaption {
  display: flex; gap: 1rem; align-items: baseline; justify-content: space-between;
  padding: 0.85rem 1rem; border-top: 1px solid var(--line-soft); font-size: 0.98rem; color: var(--fg-muted);
}

/* map marks (drawn by app.js) */
.m-dig { fill: none; stroke: var(--dig); stroke-width: 2.5; stroke-dasharray: 9 6; }
.m-dig-fill { fill: var(--bg-raised); }
.m-label { fill: var(--fg); font: 500 13px "IBM Plex Mono", monospace; }
.m-sublabel { fill: var(--fg-muted); font: 400 11.5px "IBM Plex Mono", monospace; }
.m-edge { stroke: var(--flag); stroke-width: 1.5; opacity: 0.55; }
.m-direct { fill: var(--flag); }
.m-direct-ring { fill: none; stroke: var(--flag); stroke-width: 1.5; opacity: 0.5; }
.m-reach { fill: var(--reach); }
.m-reach-g { opacity: 0.85; }
.m-node-label { fill: var(--fg); font: 500 12px "IBM Plex Mono", monospace; paint-order: stroke; stroke: var(--bg-raised); stroke-width: 5px; stroke-linejoin: round; }
.m-node:hover .m-node-label, .m-node:focus .m-node-label { fill: var(--fg); }
.m-node { cursor: default; }
.m-node:focus { outline: none; }
.m-node:focus .m-direct { stroke: var(--focus); stroke-width: 3; }

/* ---------- sections ---------- */

.section { padding: clamp(4rem, 8vw, 6.5rem) 0; }
.band { background: var(--bg-raised); border-block: 1px solid var(--line-soft); padding: clamp(4rem, 8vw, 6.5rem) 0; }

.chain { list-style: none; padding: 0; margin: 2.75rem 0 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; }
.chain li { position: relative; padding: 0 2rem 0 0; }
.chain li + li { padding-left: 2.25rem; border-left: 1px dashed var(--line); }
.chain svg { width: 2.75rem; height: 2.75rem; fill: none; stroke: var(--fg); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; margin-bottom: 1rem; }
.chain li:nth-child(2) svg { stroke: var(--flag); }
.chain li:nth-child(3) svg { stroke: var(--cycle); }
.chain p { color: var(--fg-muted); }
.source { margin-top: 2.75rem; padding-top: 1.5rem; border-top: 1px solid var(--line-soft); color: var(--fg-muted); font-size: 1rem; max-width: 70ch; }

/* tabs */
.tabs { margin-top: 2.25rem; }
.tabs__list { display: flex; gap: 0.25rem; border-bottom: 1px solid var(--line); overflow-x: auto; }
.tabs__list [role="tab"] {
  background: none; border: 0; border-bottom: 3px solid transparent; margin-bottom: -1px;
  color: var(--fg-muted); padding: 0.8rem 1.1rem; font: 700 1.05rem "Atkinson Hyperlegible", sans-serif; cursor: pointer; white-space: nowrap;
}
.tabs__list [role="tab"] span { font-weight: 400; font-size: 0.9rem; margin-left: 0.35rem; }
.tabs__list [role="tab"][aria-selected="true"] { color: var(--fg); border-bottom-color: var(--flag); }
.tabs__list [role="tab"]:hover { color: var(--fg); }
.panel { padding: 2rem 0 0; }
.panel:focus-visible { outline-offset: 6px; }
.panel__ask { font-size: 1.25rem; margin-bottom: 1rem; }
.panel__finding { color: var(--fg-muted); margin-top: 1.25rem; }

.cmd { margin: 0; background: var(--code-bg); border: 1px solid var(--line); border-radius: 8px; padding: 0.85rem 1rem; overflow-x: auto; font-size: 0.9rem; }
.cmd code { background: none; padding: 0; }

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr)); gap: 1rem; margin: 1.5rem 0 0; }
.stats div { border-top: 3px solid var(--line); padding-top: 0.75rem; }
.stats div:first-child { border-top-color: var(--flag); }
.stats dt { color: var(--fg-muted); font-size: 0.98rem; order: 2; }
.stats dd {
  margin: 0; font-family: "Big Shoulders Display", sans-serif; font-weight: 800;
  font-size: clamp(2.6rem, 5vw, 3.4rem); line-height: 1; font-variant-numeric: tabular-nums;
}
.stats dd small { font-family: "Atkinson Hyperlegible", sans-serif; font-weight: 400; font-size: 1rem; color: var(--fg-muted); }
.stats div { display: flex; flex-direction: column-reverse; gap: 0.35rem; }

.more { margin-top: 1.5rem; }
.more summary, .faq summary { cursor: pointer; font-weight: 700; list-style: none; display: flex; align-items: center; gap: 0.6rem; }
.more summary::-webkit-details-marker, .faq summary::-webkit-details-marker { display: none; }
.more summary::before, .faq summary::before {
  content: ""; width: 0.55rem; height: 0.55rem; flex: none;
  border-right: 2px solid currentColor; border-bottom: 2px solid currentColor;
  transform: rotate(-45deg); transition: transform 0.2s ease;
}
.more[open] summary::before, .faq details[open] summary::before { transform: rotate(45deg); }
.more summary { color: var(--link); width: fit-content; }
.output {
  margin: 1rem 0 0; background: var(--code-bg); border: 1px solid var(--line); border-radius: 8px;
  padding: 1rem; overflow-x: auto; font-size: 0.82rem; line-height: 1.6; color: var(--fg);
}
.output code { background: none; padding: 0; font-size: inherit; }
.more__note { color: var(--fg-muted); font-size: 0.98rem; margin-top: 0.75rem; }

/* steps: a real sequence, so numbered */
.steps { list-style: none; padding: 0; margin: 2.5rem 0 0; counter-reset: step; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 2rem; }
.steps li { counter-increment: step; display: flex; flex-direction: column; }
.steps li::before {
  content: counter(step);
  font-family: "Big Shoulders Display", sans-serif; font-weight: 800; font-size: 2.6rem; line-height: 1;
  color: var(--flag); margin-bottom: 0.75rem;
}
.steps p { color: var(--fg-muted); flex: 1; }
.steps .cmd { font-size: 0.82rem; white-space: pre-wrap; overflow-wrap: anywhere; }
.tip { margin-top: 2rem; color: var(--fg-muted); }

/* split layouts */
.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(2rem, 5vw, 4.5rem); align-items: start; }
.split h2 { margin-bottom: 1.25rem; }
.split .btn { margin-top: 0.5rem; }

.quote { margin: 0; background: var(--code-bg); border: 1px solid var(--line); border-left: 4px solid var(--dig); border-radius: 8px; padding: 1.5rem; }
.quote blockquote { margin: 0; }
.quote ul { padding-left: 1.1rem; margin: 0.75rem 0 0; }
.quote li { margin-bottom: 0.55rem; }
.quote li code { background: var(--bg-sunk); }
.quote figcaption { margin-top: 1rem; font-size: 0.95rem; color: var(--fg-muted); }

.verdict { margin: 1.5rem 0; }
.verdict span {
  display: inline-block; font-family: "Big Shoulders Display", sans-serif; font-weight: 800; font-size: 2.4rem; letter-spacing: 0.06em;
  color: var(--cycle); border: 3px solid var(--cycle); padding: 0.1rem 0.9rem; border-radius: 6px; transform: rotate(-2deg);
}
.limits__title { font-size: 1.35rem; margin-bottom: 1rem; }
.limits { list-style: none; padding: 0; margin: 0; }
.limits li { padding: 0.9rem 0; border-top: 1px solid var(--line-soft); color: var(--fg-muted); }
.limits li:last-child { border-bottom: 1px solid var(--line-soft); }
.limits strong { color: var(--fg); }

.cta h2 { max-width: 16ch; }
.install--wide { max-width: 44rem; }

.faq { display: grid; grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.6fr); gap: clamp(2rem, 5vw, 4.5rem); }
.faq__list details { border-top: 1px solid var(--line); padding: 1.1rem 0; }
.faq__list details:last-child { border-bottom: 1px solid var(--line); }
.faq summary { font-size: 1.12rem; }
.faq details p { margin: 0.8rem 0 0 1.2rem; color: var(--fg-muted); }

/* footer */
.foot { padding: 2.5rem 0 3rem; border-top: 1px solid var(--line-soft); }
.foot__row { display: flex; flex-wrap: wrap; gap: 1rem 2rem; align-items: center; justify-content: space-between; }
.foot p { margin: 0; color: var(--fg-muted); font-size: 1rem; }
.foot nav { display: flex; flex-wrap: wrap; gap: 0.5rem 1.4rem; }
.foot nav a { font-size: 1rem; }

/* ---------- responsive ---------- */

@media (max-width: 960px) {
  .hero__grid, .split, .faq { grid-template-columns: minmax(0, 1fr); }
  .nav { display: none; }
  .top__actions { margin-left: auto; }
  h1 { max-width: 14ch; }
}
@media (max-width: 760px) {
  .chain, .steps { grid-template-columns: minmax(0, 1fr); gap: 2rem; }
  .chain li, .chain li + li { padding: 0; border-left: 0; }
  .chain li + li { padding-top: 2rem; border-top: 1px dashed var(--line); }
  .locate__readout { position: static; margin: 0 1rem 1rem; }
  .locate figcaption { flex-direction: column; gap: 0.25rem; }
  body { font-size: 1.0625rem; }
  .tabs__list [role="tab"] { padding: 0.8rem 0.7rem; }
  .tabs__list [role="tab"] span { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
}