/* Homeowner Insights Brain — hub chrome, Brand System v1.0 (PROPOSED).
   Tokens from Brand/homeowner-insights/brand-sheet.md. Light-first: Paper
   ground, white cards, Deepwater ink, Harbor links and primary buttons,
   IBM Plex Mono eyebrows in Harbor on light. Dark (Deepwater into Midnight)
   is punctuation only: the brainbar, the hero band, the footer. Shoal is the
   accent on dark; Spark never carries text on a light ground. Source Serif 4
   display, Public Sans body, IBM Plex Mono data. 16px radii, hairlines over
   shadows, Title Case labels. */

:root {
  /* Primary */
  --paper: #F2F6F7;
  --white: #FFFFFF;
  --ink: #041E42;            /* Deepwater */
  --harbor: #005F61;         /* links, labels, primary buttons */
  /* Secondary */
  --midnight: #001628;
  --shoal: #99D9D9;          /* dark grounds only */
  --spark: #FA4616;          /* never text on a light ground */
  /* Tertiary / working set */
  --seawall: #355464;        /* secondary text on light */
  --silt: #597385;           /* muted captions */
  --channel: #68A2B9;        /* graphics and large numerals only */
  --flag: #E9072B;           /* the only red */
  /* Derived implementation tokens (documented in the brand sheet) */
  --harbor-deep: #00494B;    /* Harbor hover */
  --tint: #E4EDF0;           /* light bands */
  --rule: #EDF3F5;           /* light rule */
  --hairline: #D4E1E7;       /* light hairline */
  --dark-hairline: #153352;
  --dark-muted: #A9BFCB;
  --serif: "Source Serif 4", "Source Serif Pro", Georgia, "Times New Roman", serif;
  --sans: "Public Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --radius: 16px;
  --radius-input: 12px;
}

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

body {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
  font-size: 16px;
}

a { color: var(--harbor); text-decoration: none; }
a:hover { color: var(--harbor-deep); }

/* ---------- Sticky header + portal nav (byte-identical on every page) ---------- */
header.brainbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: linear-gradient(180deg, var(--ink) 0%, var(--midnight) 100%);
  color: var(--paper);
  padding: 14px 28px 0;
  border-bottom: 1px solid var(--dark-hairline);
}
.brainbar-top { display: flex; align-items: center; gap: 14px; padding-bottom: 12px; }
.brainbar-top img { display: block; flex: none; }
.brainbar-name { font-family: var(--serif); font-weight: 700; font-size: 0.98rem; letter-spacing: -0.022em; color: var(--paper); }
.brainbar-name a { color: var(--paper); display: inline-flex; align-items: center; gap: 9px; }
.brainbar-name a > span { transform: translateY(2px); }
.brainbar-tag { font-family: var(--mono); font-size: 0.66rem; font-weight: 600; letter-spacing: 0.18em; text-transform: uppercase; color: var(--shoal); margin-left: auto; text-align: right; }
nav.portal {
  display: flex; gap: 4px; overflow-x: auto; -webkit-overflow-scrolling: touch;
  border-top: 1px solid var(--dark-hairline); padding: 6px 0 0; scrollbar-width: none;
}
nav.portal::-webkit-scrollbar { display: none; }
nav.portal a {
  flex: none; color: rgba(242, 246, 247, 0.82); font-size: 0.8rem; font-weight: 500;
  padding: 8px 12px 10px; border-bottom: 3px solid transparent; white-space: nowrap;
}
nav.portal a:hover { color: var(--paper); border-bottom-color: rgba(153, 217, 217, 0.5); }
body.p-home    nav.portal a[href="./index.html"],
body.p-oph     nav.portal a[href="./operating-hub.html"],
body.p-gallery nav.portal a[href="./prompt-gallery.html"],
body.p-tqs     nav.portal a[href="./templates-quick-start.html"],
body.p-brand   nav.portal a[href="./brand-os-hi.html"],
body.p-tools   nav.portal a[href="./tools.html"],
body.p-assets  nav.portal a[href="./asset-directory.html"],
body.p-addons  nav.portal a[href="./skills-and-addons.html"],
body.p-setup   nav.portal a[href="./setup-guide.html"],
body.p-log     nav.portal a[href="./changelog.html"]
{ color: var(--paper); border-bottom-color: var(--shoal); }

/* ---------- Layout ---------- */
main { max-width: 1560px; margin: 0 auto; padding: 44px 28px 90px; }
section { margin-top: 52px; }

.kicker {
  font-family: var(--mono);
  font-size: 0.7rem; font-weight: 600; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--harbor);
}
h1 { font-family: var(--serif); font-weight: 700; font-size: clamp(2rem, 4.6vw, 3rem); line-height: 1.08; letter-spacing: -0.02em; margin-top: 10px; }
h2 { font-family: var(--serif); font-weight: 600; font-size: 1.5rem; letter-spacing: -0.015em; margin: 8px 0 4px; }
h3 { font-family: var(--serif); font-weight: 600; font-size: 1.1rem; }
.lede { margin-top: 12px; max-width: 64ch; color: var(--seawall); font-size: 1.04rem; }

/* Hero band: the sanctioned dark punctuation, one Spark radial wash only */
.heroband {
  background:
    radial-gradient(56% 80% at 84% 0%, rgba(250, 70, 22, 0.14), transparent 70%),
    linear-gradient(180deg, var(--ink) 0%, var(--midnight) 100%);
  color: var(--paper);
  border-radius: var(--radius); padding: 40px 36px; margin-top: 8px;
  position: relative; overflow: hidden;
}
.heroband .kicker { color: var(--spark); }
.heroband h1 { color: var(--paper); }
.heroband .lede { color: var(--dark-muted); }
.heroband .spark { color: var(--spark); }
.heroband a { color: var(--shoal); }

/* Cards */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(270px, 1fr)); gap: 16px; margin-top: 20px; }
.card {
  display: block; background: var(--white); border: 1px solid var(--hairline);
  border-radius: var(--radius); padding: 20px; color: var(--ink);
  transition: border-color 0.16s ease, transform 0.16s ease;
}
.card:hover { border-color: var(--harbor); transform: translateY(-1px); color: var(--ink); }
.card p { font-size: 0.9rem; color: var(--seawall); margin-top: 6px; }
.card .go { display: inline-block; margin-top: 12px; font-size: 0.8rem; font-weight: 700; color: var(--harbor); }
.card .num { font-family: var(--mono); font-size: 1.7rem; font-weight: 500; color: var(--channel); font-variant-numeric: tabular-nums; }

.badge {
  display: inline-block; font-family: var(--mono); font-size: 0.62rem; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase;
  border-radius: 999px; padding: 3px 10px; vertical-align: middle;
}
.badge.live { background: var(--tint); color: var(--harbor); }
.badge.soon { background: var(--rule); color: var(--seawall); }
.badge.draft { background: rgba(250, 70, 22, 0.1); color: var(--ink); }
.badge.sibling { background: var(--rule); color: var(--seawall); }

/* Tables */
table.list { width: 100%; border-collapse: collapse; margin-top: 16px; font-size: 0.94rem; background: var(--white); border: 1px solid var(--hairline); border-radius: var(--radius); overflow: hidden; }
table.list th { font-family: var(--mono); font-size: 0.66rem; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; color: var(--seawall); text-align: left; padding: 12px 16px; background: var(--tint); }
table.list td { padding: 12px 16px; border-top: 1px solid var(--hairline); vertical-align: top; }
table.list td.mono, .mono { font-family: var(--mono); font-size: 0.8rem; }
table.list tr:hover td { background: var(--paper); }

/* Notes */
.note { margin-top: 20px; padding: 16px 20px; background: var(--tint); border-radius: var(--radius); font-size: 0.94rem; max-width: 74ch; }
.note.warn { background: rgba(250, 70, 22, 0.09); }

/* Steps (How It Fits Together) */
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; margin-top: 20px; }
.step { background: var(--white); border: 1px solid var(--hairline); border-radius: var(--radius); padding: 20px; }
.step .n { font-family: var(--mono); font-size: 1.5rem; font-weight: 500; color: var(--channel); font-variant-numeric: tabular-nums; }

/* Prompt gallery */
.toolbar { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; align-items: center; }
.toolbar input[type="search"] { flex: 1; min-width: 220px; font: inherit; padding: 12px 16px; border: 1px solid var(--hairline); border-radius: var(--radius-input); background: var(--white); color: var(--ink); }
.toolbar input[type="search"]:focus { outline: 2px solid var(--harbor); outline-offset: 2px; border-color: var(--harbor); }
.chip { font-family: inherit; font-size: 0.78rem; font-weight: 600; border: 1px solid var(--hairline); background: var(--white); color: var(--seawall); padding: 8px 14px; border-radius: 999px; cursor: pointer; }
.chip:hover { border-color: var(--harbor); color: var(--ink); }
.chip.on { background: var(--ink); border-color: var(--ink); color: var(--paper); }
.prompt-card .tags { display: flex; flex-wrap: wrap; gap: 6px; margin: 8px 0 10px; }
.prompt-card .tag { font-family: var(--mono); font-size: 0.6rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; background: var(--rule); color: var(--seawall); padding: 2px 8px; border-radius: 4px; }
.prompt-card .tag.b-hi { background: var(--ink); color: var(--shoal); }
.prompt-card .tag.b-both { background: var(--tint); color: var(--harbor); }
.prompt-card pre { font-family: var(--mono); font-size: 0.76rem; line-height: 1.55; white-space: pre-wrap; color: var(--ink); background: var(--paper); padding: 12px 14px; border-radius: 10px; border: 1px solid var(--hairline); max-height: 220px; overflow: auto; }
button.copy { margin-top: 10px; font-family: inherit; font-size: 0.78rem; font-weight: 700; background: var(--harbor); color: var(--white); border: 0; padding: 9px 18px; border-radius: 999px; cursor: pointer; transition: background 0.16s ease, transform 0.16s ease; }
button.copy:hover { background: var(--harbor-deep); transform: translateY(-1px); }
button.copy.done { background: var(--ink); }

/* Buttons: Harbor fill, Paper label, 1px lift, no sheen (tools context) */
.btnrow { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 20px; }
a.btn {
  display: inline-block; font-size: 0.9rem; font-weight: 700; text-align: center;
  background: var(--harbor); color: var(--paper); padding: 12px 22px; border-radius: 999px;
  transition: background 0.16s ease, transform 0.16s ease, border-color 0.16s ease;
}
a.btn:hover { background: var(--harbor-deep); color: var(--paper); transform: translateY(-1px); }
a.btn.spark { background: var(--ink); color: var(--paper); }
a.btn.spark:hover { background: var(--midnight); }
a.btn.quiet { background: var(--white); color: var(--harbor); border: 1px solid var(--hairline); }
a.btn.quiet:hover { border-color: var(--harbor); color: var(--harbor-deep); transform: none; }

/* Footer (byte-identical on every page) */
footer.brainfoot {
  background: var(--midnight); color: var(--dark-muted);
  margin-top: 80px; padding: 30px 28px 44px;
  font-size: 0.85rem; display: flex; flex-wrap: wrap; gap: 12px 44px; justify-content: space-between;
}
footer.brainfoot strong { color: var(--shoal); font-weight: 600; }
footer.brainfoot .mono { font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.08em; color: rgba(153, 217, 217, 0.75); }

@media (max-width: 640px) {
  header.brainbar { padding: 12px 16px 0; }
  main { padding: 32px 16px 70px; }
  .heroband { padding: 28px 22px; }
}

@media (prefers-reduced-motion: reduce) {
  .card, a.btn, button.copy { transition: none; }
  .card:hover, a.btn:hover, button.copy:hover { transform: none; }
}