/* ============================================================
   Design tokens — light "blueprint" theme (approved mockup)
   --bg        #FBFCFE  page background
   --navy      #12314F  primary text / bands
   --ink-2     #5B6E80  secondary text
   --amber     #E9930C  accent (buttons, active nav, arrows)
   --on-amber  #412402  text on amber
   --amber-tx  #B97014  amber text on white (AA)
   --fill-blue #F1F6FA  pale blue fill
   --fill-amb  #FDF3E1  pale amber fill
   --line      #E3E9F0  hairlines
   ============================================================ */
:root {
  --bg: #FBFCFE;
  --navy: #12314F;
  --ink-2: #5B6E80;
  --amber: #E9930C;
  --on-amber: #412402;
  --amber-tx: #B97014;
  --fill-blue: #F1F6FA;
  --fill-amb: #FDF3E1;
  --line: #E3E9F0;
  --svg-box: #2C4A66;
  --svg-stroke: #A8BDD0;
  --svg-flow: #93A9BD;
  --grid: #EAF0F6;
  --font-display: "Barlow Condensed", "Arial Narrow", sans-serif;
  --font-body: "IBM Plex Sans", "Segoe UI", Arial, sans-serif;
}

@font-face {
  font-family: "Barlow Condensed";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("/fonts/barlow-condensed-600.woff2") format("woff2");
}
@font-face {
  font-family: "IBM Plex Sans";
  font-style: normal;
  font-weight: 100 700;
  font-display: swap;
  src: url("/fonts/ibm-plex-sans-var.woff2") format("woff2");
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--navy);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
}

img, svg { max-width: 100%; height: auto; }

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

:focus-visible {
  outline: 2px solid var(--amber-tx);
  outline-offset: 2px;
  border-radius: 2px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--navy);
  color: #fff;
  padding: 8px 16px;
  z-index: 100;
}
.skip-link:focus { left: 8px; top: 8px; }

.container { max-width: 1080px; margin: 0 auto; padding: 0 22px; }

/* ---------- Header / nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
  z-index: 50;
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  padding-top: 14px;
  padding-bottom: 14px;
}
.brand {
  font-family: var(--font-display);
  font-size: 22px;
  letter-spacing: 0.4px;
  color: var(--navy);
  text-decoration: none;
}
.brand:hover { text-decoration: none; }
.site-nav { display: flex; align-items: center; gap: 20px; flex-wrap: wrap; }
.site-nav a {
  font-size: 14px;
  color: var(--ink-2);
  padding-bottom: 2px;
  border-bottom: 2px solid transparent;
}
.site-nav a:hover { color: var(--navy); text-decoration: none; }
.site-nav a[aria-current="page"] {
  color: var(--amber-tx);
  border-bottom-color: var(--amber);
}

.btn {
  display: inline-block;
  background: var(--amber);
  color: var(--on-amber);
  font-weight: 600;
  font-size: 14px;
  padding: 9px 16px;
  border-radius: 6px;
  border: 0;
  cursor: pointer;
}
.btn:hover { background: #D9850A; text-decoration: none; }
.btn-ghost {
  background: transparent;
  color: var(--navy);
  border: 1px solid var(--svg-stroke);
}
.btn-ghost:hover { background: var(--fill-blue); }

/* ---------- Hero ---------- */
.hero {
  background-image:
    repeating-linear-gradient(0deg, var(--grid) 0 1px, transparent 1px 22px),
    repeating-linear-gradient(90deg, var(--grid) 0 1px, transparent 1px 22px);
  border-bottom: 1px solid var(--line);
  padding: 48px 0 28px;
}
.hero h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(34px, 6vw, 52px);
  line-height: 1.1;
  margin: 0 0 12px;
}
.hero .lede {
  font-size: 17px;
  color: var(--ink-2);
  max-width: 560px;
  margin: 0 0 8px;
}
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; margin: 18px 0 8px; }
.hero-diagram { margin-top: 18px; }

/* Diagram text (inline SVG inherits page fonts) */
.svg-label { font-family: var(--font-body); font-size: 11px; fill: var(--ink-2); }
.svg-box-text { font-family: var(--font-body); font-size: 12px; fill: var(--svg-box); }
.svg-box-text-sm { font-family: var(--font-body); font-size: 11px; fill: var(--svg-box); }
.svg-amber-text { font-family: var(--font-body); font-size: 12px; fill: #854F0B; }
.svg-white-text { font-family: var(--font-body); font-size: 13px; fill: #FFFFFF; }
.svg-white-text-sm { font-family: var(--font-body); font-size: 11px; fill: #B9CBDC; }

/* Hero flow draw-in — the one orchestrated moment */
.flow-draw {
  stroke-dasharray: 220;
  stroke-dashoffset: 220;
  animation: draw 1.4s ease-out 0.2s forwards;
}
@keyframes draw { to { stroke-dashoffset: 0; } }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .flow-draw { animation: none; stroke-dashoffset: 0; }
}

/* ---------- Sections ---------- */
.section { padding: 40px 0 8px; }
.section-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--ink-2);
  margin: 0 0 14px;
}
.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  flex-wrap: wrap;
}
.section-head .more { font-size: 14px; }

h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 30px;
  margin: 0 0 10px;
}
h3 { font-size: 18px; margin: 0 0 6px; }

/* ---------- Tiles & cards ---------- */
.tile-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px;
}
.tile {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #FFFFFF;
  padding: 16px 10px;
  text-align: center;
}
.tile svg { width: 26px; height: 26px; }
.tile p { margin: 8px 0 0; font-size: 14px; color: var(--svg-box); }

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
  margin-top: 14px;
}
.card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #FFFFFF;
  padding: 18px;
  display: flex;
  flex-direction: column;
}
.card h3 { font-size: 17px; }
.card .problem { font-weight: 600; font-size: 14px; margin: 0 0 6px; }
.card p { margin: 0 0 10px; font-size: 14px; color: var(--ink-2); }
.card .cta { margin-top: auto; font-size: 14px; }

.tags { display: flex; flex-wrap: wrap; gap: 6px; margin: 0 0 12px; padding: 0; list-style: none; }
.tags li {
  font-size: 12px;
  color: var(--svg-box);
  background: var(--fill-blue);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 2px 8px;
}

/* ---------- Filter chips (work index) ---------- */
.filters { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0 4px; }
.chip {
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--ink-2);
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 5px 14px;
  cursor: pointer;
}
.chip[aria-pressed="true"] {
  background: var(--fill-amb);
  border-color: var(--amber);
  color: #854F0B;
}
.card.is-hidden { display: none; }

/* ---------- Contact strip / navy band ---------- */
.contact-strip {
  background: var(--navy);
  color: #FFFFFF;
  margin-top: 40px;
}
.contact-strip .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  padding-top: 22px;
  padding-bottom: 22px;
}
.contact-strip p { margin: 0; font-size: 16px; }

/* ---------- Project detail pages ---------- */
.page-head { padding: 40px 0 10px; }
.page-head h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(30px, 5vw, 42px);
  margin: 0 0 8px;
}
.page-head .lede { color: var(--ink-2); max-width: 640px; margin: 0; }
.prose { max-width: 720px; }
.prose p { color: #3A4E60; }
.diagram-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #FFFFFF;
  background-image:
    repeating-linear-gradient(0deg, var(--grid) 0 1px, transparent 1px 22px),
    repeating-linear-gradient(90deg, var(--grid) 0 1px, transparent 1px 22px);
  padding: 18px;
  margin: 10px 0 6px;
}
.pn-links {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  border-top: 1px solid var(--line);
  margin-top: 36px;
  padding: 18px 0 0;
  font-size: 14px;
}

/* ---------- Contact page ---------- */
.contact-actions {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin: 22px 0;
}
.contact-actions .card { text-align: left; }
.contact-actions .card p { min-height: 0; }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--line);
  margin-top: 0;
  padding: 22px 0 30px;
  font-size: 13px;
  color: var(--ink-2);
}
.site-footer .container {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
}
.site-footer nav { display: flex; gap: 16px; flex-wrap: wrap; }

@media (max-width: 480px) {
  .hero { padding-top: 32px; }
  .section { padding-top: 30px; }
}