/* SRM-CAM guide — the app's own palette and type (gerber2rml/gui2/theme.py).
   One radius, hairline rules, copper only for copper, near-white for the one
   primary action. */

:root {
  --ink: #08090b;
  --base: #101318;
  --panel: #161a20;
  --panel-hi: #1c2129;
  --raised: #242b34;
  --raised-hi: #2d3641;
  --sunk: #0d1015;

  --rule: #1f242b;
  --rule-hi: #2b323b;
  --rule-strong: #3b4550;

  --text: #eef2f6;
  --text-2: #aab3bd;
  --text-3: #767f89;
  --text-4: #4d555e;
  --on-light: #08090b;

  --primary: #e9eef3;
  --primary-hi: #ffffff;
  --primary-lo: #c3cad1;

  --copper: #b4763c;
  --copper-hi: #d59456;
  --copper-dim: #6b482a;
  --copper-fill: #2a1e13;

  --live: #4ea8ff;
  --live-fill: #0c1c2e;
  --live-edge: #1d466e;
  --verified: #52c98a;
  --verified-fill: #0f2419;
  --verified-edge: #22503a;
  --caution: #f0a33c;
  --caution-fill: #2a1e0d;
  --caution-edge: #5c4118;
  --danger: #ff4d4d;
  --danger-fill: #2b1113;
  --danger-edge: #5e1f22;

  --select: #243040;
  --select-edge: #3d5069;

  --radius: 3px;
  --sidebar-w: 300px;
  --content-max: 880px;

  --display: "Bahnschrift", "Barlow Semi Condensed", "Arial Narrow", sans-serif;
  --label: "Bahnschrift", "Barlow Semi Condensed", "Arial Narrow", sans-serif;
  --sans: "Segoe UI Variable Text", "Segoe UI", "Inter", system-ui, sans-serif;
  --mono: "Cascadia Mono", "Consolas", "JetBrains Mono", "DejaVu Sans Mono", monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 24px; }

body {
  font-family: var(--sans);
  background: var(--base);
  color: var(--text);
  line-height: 1.6;
  font-size: 15.5px;
}

/* the tracked all-caps label the app puts over every section */
.eyebrow, .nav-title, th, .note > .t, .tip > .t, .warn > .t, .danger > .t,
.page-nav .lbl, .brand .sub, .fig figcaption .k {
  font-family: var(--label);
  font-stretch: semi-condensed;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.7rem;
}

/* ---------- layout ---------- */

.layout { display: flex; min-height: 100vh; }

.sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  background: var(--panel);
  border-right: 1px solid var(--rule);
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  padding: 18px 0 40px;
}

main {
  flex: 1;
  min-width: 0;
  padding: 44px 52px 96px;
  background: var(--base);
}

.content { max-width: var(--content-max); }

/* ---------- sidebar: the rail ---------- */

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 4px 20px 18px;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 12px;
  text-decoration: none;
}

.brand .name {
  font-family: var(--display);
  font-stretch: condensed;
  font-weight: 600;
  font-size: 1.15rem;
  letter-spacing: 0.06em;
  color: var(--text);
  display: block;
}

.brand .sub { color: var(--text-4); display: block; margin-top: 2px; }

.nav-group { padding: 10px 14px 2px; }

.nav-group > .nav-title { color: var(--text-3); padding: 8px 10px 6px; }

.sidebar a.nav-link {
  display: block;
  color: var(--text-2);
  text-decoration: none;
  font-size: 0.9rem;
  padding: 6px 10px 6px 12px;
  border-radius: var(--radius);
  border-left: 2px solid transparent;
}

.sidebar a.nav-link:hover { color: var(--text); background: var(--panel-hi); }

.sidebar a.nav-link.active {
  color: var(--text);
  background: var(--select);
  border-left-color: var(--primary);
  border-top-left-radius: 0;
  border-bottom-left-radius: 0;
}

/* mobile top bar */
.topbar { display: none; }

@media (max-width: 900px) {
  .layout { display: block; }
  .sidebar {
    position: static;
    width: 100%;
    height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--rule);
    padding-bottom: 10px;
  }
  main { padding: 28px 18px 80px; }
  .topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 18px;
  }
  .nav-wrap { display: none; }
  .nav-wrap.open { display: block; }
  .menu-btn {
    font-family: var(--label);
    font-stretch: semi-condensed;
    background: var(--raised);
    color: var(--text);
    border: 1px solid var(--rule-hi);
    border-radius: var(--radius);
    padding: 7px 14px;
    font-size: 0.85rem;
    cursor: pointer;
  }
  .sidebar .brand { border-bottom: 0; margin-bottom: 0; padding-bottom: 4px; }
}

/* ---------- typography ---------- */

h1 {
  font-family: var(--display);
  font-stretch: condensed;
  font-weight: 600;
  font-size: 2.3rem;
  letter-spacing: 0.01em;
  line-height: 1.1;
  margin-bottom: 8px;
  color: var(--text);
}

.lead {
  color: var(--text-2);
  font-size: 1.06rem;
  margin-bottom: 34px;
  max-width: 46em;
}

h2 {
  font-family: var(--display);
  font-stretch: condensed;
  font-weight: 600;
  font-size: 1.45rem;
  letter-spacing: 0.02em;
  margin: 52px 0 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--rule);
  color: var(--text);
}
h2:first-of-type { margin-top: 26px; }

h3 {
  font-family: var(--display);
  font-stretch: condensed;
  font-weight: 600;
  font-size: 1.12rem;
  letter-spacing: 0.02em;
  margin: 30px 0 10px;
  color: var(--text-2);
}

h4 { font-size: 0.95rem; font-weight: 600; margin: 22px 0 8px; }

p { margin: 0 0 14px; }
p, li { color: var(--text); }

ul, ol { margin: 0 0 16px 24px; }
li { margin-bottom: 6px; }
li > ul, li > ol { margin-top: 6px; margin-bottom: 6px; }

a { color: var(--live); text-decoration: none; }
a:hover { text-decoration: underline; }

strong { color: var(--primary-hi); font-weight: 600; }
em { color: var(--text); }

hr { border: 0; border-top: 1px solid var(--rule); margin: 36px 0; }

/* ---------- UI element callouts ---------- */

/* on-screen control names, drawn like the app's own buttons */
.ui {
  display: inline-block;
  font-family: var(--label);
  font-stretch: semi-condensed;
  background: var(--raised);
  border: 1px solid var(--rule-hi);
  border-radius: var(--radius);
  padding: 0 7px;
  font-size: 0.86em;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
  line-height: 1.55;
}

kbd {
  font-family: var(--mono);
  font-size: 0.8em;
  background: var(--raised);
  border: 1px solid var(--rule-hi);
  border-bottom-width: 2px;
  border-radius: var(--radius);
  padding: 1px 6px;
  color: var(--text);
  white-space: nowrap;
}

code {
  font-family: var(--mono);
  font-size: 0.86em;
  background: var(--sunk);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 1px 6px;
  color: var(--text-2);
}

pre {
  background: var(--sunk);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 14px 18px;
  overflow-x: auto;
  margin: 0 0 18px;
  line-height: 1.55;
}
pre code { background: none; border: 0; padding: 0; font-size: 0.84rem; color: var(--text-2); }

/* ---------- callout boxes: the app's four statuses ---------- */

.note, .tip, .warn, .danger {
  border-radius: var(--radius);
  padding: 12px 16px 12px 15px;
  margin: 0 0 18px;
  border: 1px solid var(--rule);
  border-left-width: 3px;
  font-size: 0.94rem;
}
.note   { border-color: var(--live-edge);     border-left-color: var(--live);     background: var(--live-fill); }
.tip    { border-color: var(--verified-edge); border-left-color: var(--verified); background: var(--verified-fill); }
.warn   { border-color: var(--caution-edge);  border-left-color: var(--caution);  background: var(--caution-fill); }
.danger { border-color: var(--danger-edge);   border-left-color: var(--danger);   background: var(--danger-fill); }

.note > .t, .tip > .t, .warn > .t, .danger > .t { display: block; margin-bottom: 5px; }
.note > .t   { color: var(--live); }
.tip > .t    { color: var(--verified); }
.warn > .t   { color: var(--caution); }
.danger > .t { color: var(--danger); }

.note p:last-child, .tip p:last-child, .warn p:last-child, .danger p:last-child { margin-bottom: 0; }
.note ul, .tip ul, .warn ul, .danger ul { margin-bottom: 0; }

/* ---------- step lists: numerals like the rail's ---------- */

.steps { counter-reset: step; list-style: none; margin: 0 0 24px; }

.steps > li {
  counter-increment: step;
  position: relative;
  padding: 2px 0 22px 52px;
  margin: 0;
}

.steps > li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 32px;
  font-family: var(--display);
  font-stretch: condensed;
  font-weight: 600;
  font-size: 1.5rem;
  line-height: 1.2;
  color: var(--text-3);
  text-align: center;
}

.steps > li::after {
  content: "";
  position: absolute;
  left: 15.5px;
  top: 34px;
  bottom: 6px;
  width: 1px;
  background: var(--rule-hi);
}
.steps > li:last-child::after { display: none; }

.steps > li > .st {
  font-weight: 600;
  color: var(--text);
  display: block;
  margin-bottom: 3px;
  padding-top: 4px;
}

/* ---------- tables: recessed, hairlines ---------- */

.tbl-wrap {
  overflow-x: auto;
  margin: 0 0 20px;
  background: var(--sunk);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
}

table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.9rem;
}

th, td {
  text-align: left;
  padding: 9px 14px;
  border-bottom: 1px solid var(--rule);
  vertical-align: top;
}
tr:last-child td { border-bottom: 0; }

th { color: var(--text-3); border-bottom: 1px solid var(--rule-hi); }

td code { white-space: nowrap; }

tr:hover td { background: var(--panel); }

/* ---------- cards (index page) ---------- */

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 12px;
  margin: 22px 0 10px;
}

.card {
  display: block;
  background: var(--panel-hi);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 16px 18px 15px;
  text-decoration: none;
}

.card:hover { border-color: var(--rule-strong); background: var(--raised); text-decoration: none; }

.card .ct {
  font-family: var(--display);
  font-stretch: condensed;
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
  color: var(--text);
  margin-bottom: 5px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.card .ct .ico { font-size: 1rem; }
.card .cd { color: var(--text-2); font-size: 0.87rem; line-height: 1.5; }

/* hero (index) */
.hero { padding: 20px 0 8px; }
.hero .badge-row { display: flex; gap: 8px; flex-wrap: wrap; margin: 18px 0 4px; }

/* chips, like the app's status chips */
.badge {
  font-family: var(--label);
  font-stretch: semi-condensed;
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  padding: 3px 10px;
  border-radius: var(--radius);
  border: 1px solid var(--rule-hi);
  color: var(--text-2);
  background: var(--panel-hi);
}
.badge.copper { border-color: var(--copper-dim); color: var(--copper-hi); background: var(--copper-fill); }

.btn-row { display: flex; gap: 10px; margin: 26px 0 8px; flex-wrap: wrap; }

.btn {
  display: inline-block;
  font-family: var(--label);
  font-stretch: semi-condensed;
  padding: 9px 20px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  text-decoration: none;
  border: 1px solid var(--rule-hi);
  color: var(--text);
  background: var(--raised);
}
.btn:hover { text-decoration: none; background: var(--raised-hi); border-color: var(--rule-strong); }

/* the one primary action: near-white, like the app's */
.btn.primary { background: var(--primary); border-color: var(--primary); color: var(--on-light); }
.btn.primary:hover { background: var(--primary-hi); border-color: var(--primary-hi); }

/* ---------- page footer nav ---------- */

.page-nav {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 64px;
  padding-top: 22px;
  border-top: 1px solid var(--rule);
}

.page-nav a {
  flex: 1;
  max-width: 48%;
  background: var(--panel-hi);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 12px 16px;
  text-decoration: none;
}
.page-nav a:hover { border-color: var(--rule-strong); background: var(--raised); text-decoration: none; }
.page-nav a.next { text-align: right; margin-left: auto; }
.page-nav .lbl { display: block; color: var(--text-4); margin-bottom: 2px; }
.page-nav .ttl { color: var(--text); font-weight: 600; font-size: 0.92rem; }

footer.site {
  margin-top: 40px;
  color: var(--text-4);
  font-size: 0.8rem;
}
footer.site a { color: var(--text-3); }

/* ---------- misc ---------- */

.pill-flow {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin: 14px 0 20px;
}
.pill-flow .pf {
  font-family: var(--label);
  font-stretch: semi-condensed;
  background: var(--raised);
  border: 1px solid var(--rule-hi);
  border-radius: var(--radius);
  padding: 4px 13px;
  font-size: 0.86rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--text);
  white-space: nowrap;
}
.pill-flow .arr { color: var(--text-3); font-weight: 700; }

/* screenshots: on the stage's ground, so the app's own dark chrome sits flush */
.fig {
  margin: 0 0 20px;
  border: 1px solid var(--rule-hi);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink);
}
.fig img { display: block; width: 100%; height: auto; }
.fig figcaption {
  padding: 9px 14px;
  font-size: 0.82rem;
  color: var(--text-3);
  border-top: 1px solid var(--rule);
  background: var(--panel);
}
.fig.narrow { max-width: 360px; }
.fig.mid { max-width: 600px; }
.fig.pair { display: grid; grid-template-columns: 1fr 1fr; gap: 0; }

.figs { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 12px; margin: 0 0 20px; }
.figs .fig { margin: 0; }

.led { display: inline-block; width: 9px; height: 9px; border-radius: 50%; margin-right: 5px; vertical-align: baseline; }
.led.on  { background: var(--verified); }
.led.off { background: var(--text-4); }