:root {
  --bg: #f6f7fb;
  --card: #ffffff;
  --ink: #1a1d29;
  --ink-soft: #5b6172;
  --line: #e6e8f0;
  --accent: #2f7d78;
  --accent-2: #4f46e5;
  --accent-soft: #e7f3f2;
  --chip: #eef1f7;
  --shadow: 0 1px 2px rgba(20,25,45,.04), 0 8px 24px rgba(20,25,45,.06);
  --warn: #b45309; --warn-bg: #fef4e6; --warn-line: #f5cf92;
  --stop: #b91c1c; --stop-bg: #fdecec; --stop-line: #f3b6b6;
  --think: #4f46e5; --think-bg: #eeeefe; --think-line: #c9c9f7;
  font-family: "IBM Plex Sans", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); line-height: 1.55; -webkit-font-smoothing: antialiased; }
a { color: var(--accent-2); }
.mono { font-family: "IBM Plex Mono", ui-monospace, Menlo, Consolas, monospace; font-size: .92em; background: var(--chip); padding: 1px 6px; border-radius: 6px; }
.req { color: var(--stop); font-weight: 700; }

/* Layout */
.layout { display: flex; align-items: flex-start; }
.sidebar {
  position: sticky; top: 0; height: 100vh; width: 264px; flex: 0 0 264px;
  background: var(--card); border-right: 1px solid var(--line);
  padding: 24px 20px; overflow-y: auto;
}
.back { font-size: 13px; color: var(--ink-soft); text-decoration: none; }
.brand { margin: 14px 0 20px; }
.kicker { font-size: 12px; font-weight: 700; letter-spacing: .05em; text-transform: uppercase; color: var(--accent); }
.brand h1 { font-size: 21px; margin: 4px 0 0; letter-spacing: -.01em; }
#nav { display: flex; flex-direction: column; gap: 2px; }
#nav a {
  text-decoration: none; color: var(--ink-soft); font-size: 14.5px; font-weight: 500;
  padding: 9px 12px; border-radius: 9px;
}
#nav a:hover { background: var(--bg); color: var(--ink); }
#nav a.active { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.side-foot { margin-top: 22px; padding-top: 16px; border-top: 1px solid var(--line); font-size: 12px; color: var(--ink-soft); }

.content { flex: 1 1 auto; max-width: 820px; padding: 40px 40px 120px; }
section { scroll-margin-top: 20px; padding-bottom: 44px; margin-bottom: 44px; border-bottom: 1px solid var(--line); }
section:last-child { border-bottom: none; }
.sec-title { font-size: 26px; letter-spacing: -.02em; margin: 0 0 14px; }
.lede { color: var(--ink-soft); font-size: 16px; margin: 0 0 18px; }

.nav-toggle {
  display: none; position: sticky; top: 12px; margin: 12px; z-index: 20;
  background: var(--card); border: 1px solid var(--line); border-radius: 10px;
  padding: 9px 14px; font-size: 14px; font-weight: 600; box-shadow: var(--shadow); cursor: pointer;
}

/* Rule callouts */
.rule { display: flex; gap: 14px; border-radius: 14px; padding: 18px 18px; margin: 14px 0; border: 1px solid; }
.rule .rule-ico { font-size: 24px; line-height: 1.2; }
.rule h3 { margin: 0 0 4px; font-size: 17px; }
.rule p { margin: 0; font-size: 15px; }
.rule.compact { margin-top: 22px; }
.rule-warn { background: var(--warn-bg); border-color: var(--warn-line); }
.rule-warn h3 { color: var(--warn); }
.rule-stop { background: var(--stop-bg); border-color: var(--stop-line); }
.rule-stop h3 { color: var(--stop); }
.rule-think { background: var(--think-bg); border-color: var(--think-line); }
.rule-think h3 { color: var(--think); }

/* Steps */
.steps { padding-left: 22px; margin: 0 0 20px; }
.steps li { margin-bottom: 10px; font-size: 15.5px; }

/* Screenshots */
.shot { margin: 18px 0; border: 1px solid var(--line); border-radius: 14px; overflow: hidden; background: var(--card); box-shadow: var(--shadow); }
.shot img { display: block; width: 100%; height: auto; }
.shot figcaption { padding: 11px 16px; font-size: 13.5px; color: var(--ink-soft); border-top: 1px solid var(--line); }
.shot.missing { border-style: dashed; }
.shot-ph { padding: 44px 16px; text-align: center; color: var(--ink-soft); font-size: 15px; background: repeating-linear-gradient(45deg, transparent, transparent 12px, rgba(0,0,0,.02) 12px, rgba(0,0,0,.02) 24px); }

/* Field groups */
.grp { font-size: 18px; margin: 26px 0 12px; }
.grp-note { color: var(--ink-soft); font-weight: 400; font-size: 15px; }
.fields { display: flex; flex-direction: column; gap: 10px; }
.field { display: grid; grid-template-columns: 200px 1fr; gap: 4px 18px; background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; box-shadow: var(--shadow); }
.field .fname { grid-row: 1 / span 2; font-weight: 600; font-size: 15px; }
.field .fwhat { color: var(--ink-soft); font-size: 14px; }
.field .fdo { font-size: 14.5px; }
.field.flag { border-color: var(--warn-line); background: var(--warn-bg); }

/* Pull list + example */
.pull-list { margin: 0 0 20px; padding-left: 20px; }
.pull-list li { margin-bottom: 6px; }
.example-msg { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 18px 20px; box-shadow: var(--shadow); }
.msg-label { font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; color: var(--ink-soft); margin-bottom: 6px; }
.msg { font-family: "IBM Plex Mono", ui-monospace, monospace; background: var(--bg); border-radius: 10px; padding: 12px 14px; margin: 0 0 16px; font-size: 14.5px; }
.decoded { margin: 0; padding-left: 20px; }
.decoded li { margin-bottom: 5px; }

/* Tools & search */
.tool { margin-top: 22px; }
.tool-label { display: block; font-weight: 600; font-size: 14px; margin-bottom: 8px; }
.search {
  width: 100%; font-size: 15.5px; padding: 12px 15px; border-radius: 11px;
  border: 1px solid var(--line); background: var(--card); color: var(--ink); box-shadow: var(--shadow);
}
.search:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
.hint { color: var(--ink-soft); font-size: 14px; }

/* Chips */
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin: 6px 0; }
.chip { font-family: "IBM Plex Mono", ui-monospace, monospace; font-size: 12.5px; background: var(--chip); border-radius: 7px; padding: 3px 8px; }
.chip.rec { background: var(--accent-soft); color: var(--accent); }
.chip.kit { background: #eef0fe; color: var(--accent-2); font-family: inherit; }

/* Alias decoder */
.alias-results { margin-top: 14px; display: flex; flex-direction: column; gap: 8px; }
.alias-row { display: grid; grid-template-columns: 1fr auto 1.4fr; align-items: center; gap: 12px; background: var(--card); border: 1px solid var(--line); border-radius: 11px; padding: 11px 14px; box-shadow: var(--shadow); }
.alias-say { font-weight: 600; }
.alias-arrow { color: var(--ink-soft); }
.alias-mean { font-size: 14.5px; }
.alias-tag { display: inline-block; font-size: 11px; font-weight: 600; color: var(--accent-2); background: #eef0fe; padding: 2px 7px; border-radius: 6px; margin-left: 6px; }
.alias-note { font-size: 12.5px; color: var(--ink-soft); margin-top: 3px; }

/* Tabs */
.tabs { display: flex; gap: 6px; margin-bottom: 16px; flex-wrap: wrap; }
.tab { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 9px 14px; font-size: 14px; font-weight: 600; color: var(--ink-soft); cursor: pointer; }
.tab.active { background: var(--accent); border-color: var(--accent); color: #fff; }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* Kit / procedure cards */
.kit-results, .proc-results { margin-top: 14px; display: flex; flex-direction: column; gap: 20px; }
.fam-group h4 { font-size: 13px; text-transform: uppercase; letter-spacing: .05em; color: var(--accent); margin: 0 0 10px; }
.fam-cards { display: flex; flex-direction: column; gap: 10px; }
.kit-card, .proc-card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 15px 17px; box-shadow: var(--shadow); }
.kit-card h5, .proc-card h5 { font-size: 16px; margin: 0 0 4px; }
.kit-card .sap, .proc-card .note { font-size: 13px; color: var(--ink-soft); margin-top: 8px; }
.label { font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: .03em; color: var(--ink-soft); margin: 10px 0 4px; }
.dep-badge { font-size: 11px; font-weight: 700; color: var(--stop); background: var(--stop-bg); padding: 2px 7px; border-radius: 6px; margin-left: 8px; vertical-align: middle; }

/* Catalog table */
.sku-results { margin-top: 14px; }
.sku-count { font-size: 13px; color: var(--ink-soft); margin-bottom: 8px; }
table.sku { width: 100%; border-collapse: collapse; font-size: 13.5px; }
table.sku th, table.sku td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
table.sku th { position: sticky; top: 0; background: var(--bg); font-size: 12px; text-transform: uppercase; letter-spacing: .03em; color: var(--ink-soft); }
table.sku td.c-sku { font-family: "IBM Plex Mono", ui-monospace, monospace; white-space: nowrap; }
.sku-scroll { max-height: 620px; overflow: auto; border: 1px solid var(--line); border-radius: 12px; }

/* Glossary + placeholder */
.glossary { display: grid; grid-template-columns: 220px 1fr; gap: 10px 18px; }
.glossary dt { font-weight: 600; }
.glossary dd { margin: 0; color: var(--ink-soft); }
.placeholder { background: var(--card); border: 1px dashed var(--line); border-radius: 14px; padding: 22px; }
.placeholder p { margin: 0 0 8px; }

@media (max-width: 820px) {
  .sidebar { position: fixed; left: 0; top: 0; transform: translateX(-100%); transition: transform .2s ease; z-index: 30; box-shadow: var(--shadow); }
  .sidebar.open { transform: translateX(0); }
  .nav-toggle { display: inline-block; }
  .content { padding: 8px 18px 100px; }
  .field { grid-template-columns: 1fr; }
  .field .fname { grid-row: auto; }
  .glossary { grid-template-columns: 1fr; gap: 2px 0; }
  .glossary dd { margin-bottom: 10px; }
  .alias-row { grid-template-columns: 1fr; gap: 4px; }
  .alias-arrow { display: none; }
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1117; --card: #171a23; --ink: #e9ebf2; --ink-soft: #9aa1b4; --line: #262a36;
    --accent: #4fd1c5; --accent-2: #8b8cf7; --accent-soft: #16302e; --chip: #222634;
    --shadow: 0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.3);
    --warn: #f0b866; --warn-bg: #2a2110; --warn-line: #5c4620;
    --stop: #f19a9a; --stop-bg: #2c1717; --stop-line: #5c2b2b;
    --think: #b0b1f9; --think-bg: #1a1a2e; --think-line: #34346a;
  }
  .chip.kit { background: #23244a; color: #b0b1f9; }
  .alias-tag { background: #23244a; }
}