/* PipeData.org — pipe, flange and fitting specification database */

:root {
  --steel:        #2B4C7E;
  --steel-dark:   #1E3860;
  --steel-light:  #3E68A6;
  --gray:         #5B6770;
  --orange:       #D35400;
  --orange-dark:  #A84300;
  --bg:           #F7F8FA;
  --surface:      #FFFFFF;
  --text:         #1B2430;
  --text-muted:   #5B6770;
  --th-bg:        #E7EDF5;
  --row-alt:      #F4F6F9;
  --border:       #D3D9E2;
  --border-soft:  #E4E8EE;
  --link:         #2B4C7E;
  --radius:       6px;
  --shadow:       0 1px 2px rgba(27, 36, 48, .06), 0 4px 16px rgba(27, 36, 48, .05);
  --maxw:         1180px;
}

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

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.62;
  color: var(--text);
  background: var(--bg);
  font-feature-settings: "kern" 1;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.22;
  letter-spacing: -.017em;
  color: var(--steel);
  margin: 0 0 .5em;
}
h1 { font-size: clamp(1.7rem, 1.2rem + 2vw, 2.35rem); }
h2 { font-size: clamp(1.28rem, 1.1rem + 1vw, 1.55rem); margin-top: 2.4rem; }
h3 { font-size: 1.08rem; margin-top: 1.5rem; }

p { margin: 0 0 1rem; }
ul, ol { margin: 0 0 1.2rem; padding-left: 1.3rem; }
li { margin-bottom: .35rem; }

a { color: var(--link); text-decoration: none; }
a:hover { color: var(--orange); text-decoration: underline; text-underline-offset: 2px; }

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: .9em;
  background: var(--th-bg);
  padding: .1em .35em;
  border-radius: 3px;
}

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 1.25rem; }
.narrow { max-width: 760px; }
.muted { color: var(--text-muted); font-size: .9rem; }

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

.site-header {
  background: var(--steel);
  color: #fff;
  border-bottom: 3px solid var(--orange);
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 64px;
  flex-wrap: wrap;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  color: #fff;
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: -.02em;
}
.brand:hover { color: #fff; text-decoration: none; }
.brand svg { display: block; width: 32px; height: 32px; }
.brand .dot { color: var(--orange); }

.site-nav { display: flex; gap: 1.35rem; flex-wrap: wrap; }
.site-nav a { color: rgba(255,255,255,.88); font-size: .92rem; font-weight: 500; }
.site-nav a:hover { color: #fff; text-decoration: underline; }

/* ---------- breadcrumbs ---------- */

.breadcrumbs { font-size: .84rem; color: var(--text-muted); padding: .9rem 0 0; }
.breadcrumbs ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: .35rem;
  margin: 0;
  padding: 0;
}
.breadcrumbs li { margin: 0; }
.breadcrumbs li:not(:last-child)::after {
  content: "›";
  margin-left: .35rem;
  color: var(--border);
}
.breadcrumbs a { color: var(--text-muted); }
.breadcrumbs a:hover { color: var(--orange); }

/* ---------- main ---------- */

main { padding: .5rem 0 4rem; }

.page-head { margin: 1rem 0 1.6rem; }
.page-head h1 { margin-bottom: .4rem; }
.lede { font-size: 1.05rem; color: var(--text-muted); max-width: 68ch; margin: 0; }

.units-note {
  font-size: .84rem;
  color: var(--text-muted);
  margin: 0 0 .6rem;
}

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

.hero {
  background: linear-gradient(165deg, var(--steel) 0%, #16294a 100%);
  color: #fff;
  padding: 3.2rem 0 3rem;
  text-align: center;
}
.hero h1 { color: #fff; margin-bottom: .5rem; }
.hero .tagline {
  color: #F3A96B;
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: .04em;
  margin-bottom: 1.7rem;
}
.hero .counter { margin: 1.5rem 0 0; font-size: .88rem; color: rgba(255,255,255,.72); }
.hero .counter strong { color: #fff; font-variant-numeric: tabular-nums; }

/* ---------- search ---------- */

.search { position: relative; max-width: 580px; margin: 0 auto; text-align: left; }
.search input {
  width: 100%;
  padding: .85rem 1rem;
  font-size: 1rem;
  font-family: inherit;
  color: var(--text);
  background: #fff;
  border: 2px solid transparent;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.search input:focus { outline: none; border-color: var(--orange); }
.search-results {
  position: absolute;
  z-index: 40;
  left: 0; right: 0;
  top: calc(100% + .35rem);
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 8px 28px rgba(0,0,0,.16);
  max-height: 360px;
  overflow-y: auto;
}
.search-results:empty { display: none; }
.search-results a {
  display: block;
  padding: .6rem .85rem;
  border-bottom: 1px solid var(--row-alt);
  color: var(--text);
  font-size: .93rem;
}
.search-results a:last-child { border-bottom: 0; }
.search-results a:hover,
.search-results a.active { background: var(--th-bg); text-decoration: none; }
.search-results .sr-meta { display: block; font-size: .78rem; color: var(--text-muted); }
.search-results .sr-none { padding: .7rem .85rem; font-size: .9rem; color: var(--text-muted); }

/* ---------- tables ---------- */

.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  margin: 0 0 .6rem;
}

table.specs {
  width: 100%;
  border-collapse: collapse;
  font-size: .93rem;
  min-width: 520px;
}
table.specs.wide { min-width: 860px; }
table.specs caption {
  caption-side: top;
  text-align: left;
  padding: .8rem 1rem .35rem;
  font-size: .82rem;
  color: var(--text-muted);
}
table.specs th,
table.specs td {
  padding: .55rem .85rem;
  text-align: right;
  border-bottom: 1px solid var(--border-soft);
  white-space: nowrap;
  vertical-align: top;
}
table.specs th:first-child,
table.specs td:first-child {
  text-align: left;
  font-weight: 600;
  position: sticky;
  left: 0;
  background: inherit;
}
table.specs thead th {
  background: var(--th-bg);
  color: var(--steel);
  font-weight: 700;
  font-size: .76rem;
  letter-spacing: .045em;
  text-transform: uppercase;
  border-bottom: 2px solid var(--border);
  white-space: normal;
  vertical-align: bottom;
}
table.specs tbody tr { background: var(--surface); }
table.specs tbody tr:nth-child(even) { background: var(--row-alt); }
table.specs tbody tr:hover { background: var(--th-bg); }
table.specs tbody tr:last-child td { border-bottom: 0; }
table.specs td { font-variant-numeric: tabular-nums; font-feature-settings: "tnum" 1; }

/* metric equivalent, stacked under the imperial primary value */
.mm {
  display: block;
  font-size: .74rem;
  color: var(--text-muted);
  font-weight: 400;
  letter-spacing: .01em;
  margin-top: .05rem;
}
.na { color: #A9B0BA; }
.yes { color: var(--orange-dark); font-weight: 600; }

/* Wide prose columns (the materials table) should wrap, not stretch. */
table.specs.wide td:last-child {
  white-space: normal;
  text-align: left;
  min-width: 22rem;
  font-weight: 400;
}

.table-note { font-size: .82rem; color: var(--text-muted); margin: 0 0 1.8rem; }

/* ---------- quick facts ---------- */

/* Cell borders are drawn per-cell rather than as a background showing through
   the gaps, so an odd count leaves a white cell instead of a grey block. */
.facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 1px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin: 0 0 2rem;
}
.facts div { background: var(--surface); box-shadow: 0 0 0 1px var(--border-soft); padding: .8rem 1rem; }
.facts dt {
  font-size: .7rem;
  letter-spacing: .07em;
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 600;
  margin-bottom: .15rem;
}
.facts dd { margin: 0; font-weight: 600; font-size: .95rem; }

/* ---------- cards ---------- */

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1rem;
  margin: 0 0 1.6rem;
  padding: 0;
  list-style: none;
}
.grid.tight { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: .7rem; }

.card {
  display: block;
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--orange);
  border-radius: var(--radius);
  padding: .95rem 1.1rem;
  color: var(--text);
  box-shadow: var(--shadow);
  transition: transform .12s ease, box-shadow .12s ease;
}
.card:hover {
  text-decoration: none;
  color: var(--text);
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(43, 76, 126, .16);
}
.card .card-title { font-weight: 700; color: var(--steel); display: block; }
.card .card-meta { font-size: .82rem; color: var(--text-muted); display: block; margin-top: .15rem; }
.card .card-spec {
  font-size: .82rem;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
  margin-top: .4rem;
  display: block;
}

/* ---------- chip links ---------- */

.chip-links { display: flex; flex-wrap: wrap; gap: .45rem; margin: 0 0 1.8rem; }
.chip-link {
  display: inline-block;
  padding: .32rem .8rem;
  font-size: .86rem;
  font-weight: 500;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  color: var(--steel);
}
.chip-link:hover {
  border-color: var(--orange);
  color: var(--orange);
  background: #fff;
  text-decoration: none;
}
.chip-link.more-chip { background: var(--steel); border-color: var(--steel); color: #fff; }
.chip-link.more-chip:hover { background: var(--orange); border-color: var(--orange); color: #fff; }

.more { font-weight: 600; }

/* ---------- callouts ---------- */

.callout {
  background: var(--th-bg);
  border-left: 4px solid var(--steel-light);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 1rem 1.2rem;
  margin: 1.6rem 0 2rem;
  font-size: .93rem;
}
.callout p:last-child { margin-bottom: 0; }
.callout.warn { background: #FDF1E7; border-left-color: var(--orange); }

.formula {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 1.02rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: .9rem 1.1rem;
  text-align: center;
  color: var(--steel);
}

/* ---------- pro/con lists ---------- */

.two-col {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.6rem;
  margin: 1.2rem 0 2rem;
}
ul.tick, ul.cross { list-style: none; padding-left: 0; }
ul.tick li, ul.cross li { padding-left: 1.5rem; position: relative; }
ul.tick li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--steel-light);
  font-weight: 700;
}
ul.cross li::before {
  content: "✕";
  position: absolute;
  left: 0;
  color: var(--orange);
  font-weight: 700;
}

/* ---------- flange face cards ---------- */

.face-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1rem;
  margin: 1.2rem 0 2rem;
}
.face-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-top: 3px solid var(--steel-light);
  border-radius: var(--radius);
  padding: 1rem 1.15rem;
  box-shadow: var(--shadow);
}
.face-card h3 { margin-top: 0; font-size: 1rem; }
.face-card p { margin-bottom: 0; font-size: .92rem; color: var(--text-muted); }

/* ---------- FAQ ---------- */

.faq { margin: 2.4rem 0 1rem; }
.faq details {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: .55rem;
  overflow: hidden;
}
.faq summary {
  cursor: pointer;
  padding: .8rem 1.1rem;
  font-weight: 600;
  color: var(--steel);
  list-style: none;
  position: relative;
  padding-right: 2.6rem;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  position: absolute;
  right: 1.1rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--orange);
  line-height: 1;
}
.faq details[open] summary::after { content: "−"; }
.faq summary:hover { background: var(--row-alt); }
.faq details > div { padding: 0 1.1rem .3rem; font-size: .95rem; }

/* ---------- footer ---------- */

.site-footer {
  background: var(--steel-dark);
  color: rgba(255,255,255,.78);
  padding: 2.6rem 0 2rem;
  font-size: .9rem;
}
.footer-cols {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1.6rem;
  margin-bottom: 2rem;
}
.site-footer h3 {
  color: #fff;
  font-size: .78rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  margin: 0 0 .7rem;
}
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin-bottom: .35rem; }
.site-footer a { color: rgba(255,255,255,.78); }
.site-footer a:hover { color: #fff; text-decoration: underline; }
.footer-legal {
  border-top: 1px solid rgba(255,255,255,.16);
  padding-top: 1.3rem;
  font-size: .82rem;
  color: rgba(255,255,255,.6);
  line-height: 1.55;
}
.footer-legal p { margin-bottom: .7rem; }
.footer-legal p:last-child { margin-bottom: 0; }
.footer-legal strong { color: rgba(255,255,255,.85); }

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

@media (max-width: 640px) {
  .site-header .wrap { min-height: 56px; padding-top: .5rem; padding-bottom: .5rem; }
  .site-nav { gap: 1rem; width: 100%; }
  .hero { padding: 2.2rem 0 2rem; }
  table.specs { font-size: .87rem; }
  table.specs th, table.specs td { padding: .5rem .65rem; }
  .facts { grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); }
}

/* ---------- print ----------
   Spec tables are printed and taken into the field, so the print sheet drops
   the chrome, un-scrolls the tables and keeps rows off page breaks. */

@media print {
  :root { --shadow: none; }
  body { background: #fff; font-size: 10.5pt; }
  .site-header, .site-footer, .breadcrumbs, .search, .chip-links,
  .hero .counter, .grid, .callout, .more { display: none !important; }
  main { padding: 0; }
  .wrap { max-width: none; padding: 0; }
  h1 { font-size: 17pt; }
  h2 { font-size: 13pt; margin-top: 1.2rem; page-break-after: avoid; }
  .table-scroll {
    overflow: visible;
    border: 1px solid #999;
    box-shadow: none;
    page-break-inside: auto;
  }
  table.specs { min-width: 0; width: 100%; font-size: 9pt; }
  table.specs thead { display: table-header-group; }
  table.specs tr { page-break-inside: avoid; }
  table.specs th, table.specs td { padding: 3pt 5pt; border-bottom: .5pt solid #bbb; }
  table.specs thead th { background: #e8e8e8 !important; -webkit-print-color-adjust: exact; }
  table.specs tbody tr:nth-child(even) { background: #f4f4f4 !important; -webkit-print-color-adjust: exact; }
  .mm { font-size: 7.5pt; }
  .facts { page-break-inside: avoid; }
  .faq details { border: 0; page-break-inside: avoid; }
  .faq details > div { display: block !important; }
  .faq summary::after { content: ""; }
  a { color: inherit; text-decoration: none; }
}