/*
Theme Name: SWC Fieldbook
Theme URI: https://www.stormwatercenter.net/
Author: Stormwater Center
Author URI: https://www.stormwatercenter.net/
Description: Engineering lab-notebook reference theme for stormwatercenter.net — graph-paper sections, technical hairline borders, slab display type, figure-caption conventions.
Version: 1.0.0
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: swc-fieldbook
Tags: custom-menu, featured-images, custom-post-types
*/

/* ---------- Fonts (self-hosted) ---------- */
@font-face {
  font-family: 'Zilla Slab';
  src: url('assets/fonts/zilla-slab-v12-latin-regular.woff2') format('woff2');
  font-weight: 400; font-style: normal; font-display: swap;
}
@font-face {
  font-family: 'Zilla Slab';
  src: url('assets/fonts/zilla-slab-v12-latin-500.woff2') format('woff2');
  font-weight: 500; font-style: normal; font-display: swap;
}
@font-face {
  font-family: 'Zilla Slab';
  src: url('assets/fonts/zilla-slab-v12-latin-700.woff2') format('woff2');
  font-weight: 700; font-style: normal; font-display: swap;
}
@font-face {
  font-family: 'Source Sans 3';
  src: url('assets/fonts/source-sans-3-v19-latin-regular.woff2') format('woff2');
  font-weight: 400; font-style: normal; font-display: swap;
}
@font-face {
  font-family: 'Source Sans 3';
  src: url('assets/fonts/source-sans-3-v19-latin-600.woff2') format('woff2');
  font-weight: 600; font-style: normal; font-display: swap;
}
@font-face {
  font-family: 'Source Sans 3';
  src: url('assets/fonts/source-sans-3-v19-latin-700.woff2') format('woff2');
  font-weight: 700; font-style: normal; font-display: swap;
}
@font-face {
  font-family: 'Caveat';
  src: url('assets/fonts/caveat-v23-latin-regular.woff2') format('woff2');
  font-weight: 400; font-style: normal; font-display: swap;
}

/* ---------- Tokens ---------- */
:root {
  --paper: #FDFCF8;
  --paper-dim: #F6F4EC;
  --ink: #233044;
  --ink-soft: #4A5A72;
  --gridline: #DFE5EC;
  --hairline: #C8D0DA;
  --accent: #EE6C1E;
  --accent-deep: #BC4F0C;
  --accent-wash: #FBEADD;
  --good: #2F7D4F;
  --mono: 'SFMono-Regular', 'Menlo', 'Consolas', monospace;
  --display: 'Zilla Slab', 'Rockwell', serif;
  --body: 'Source Sans 3', 'Segoe UI', sans-serif;
  --annot: 'Caveat', cursive;
  --measure: 940px;
  --gutter: clamp(1rem, 4vw, 2.5rem);
}

/* ---------- Base ---------- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--body);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
}
h1, h2, h3, h4 { font-family: var(--display); line-height: 1.15; color: var(--ink); }
h1 { font-size: clamp(2rem, 5vw, 3.25rem); font-weight: 700; margin: 0 0 .6em; }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); font-weight: 700; margin: 2em 0 .6em; }
h3 { font-size: 1.3rem; font-weight: 500; margin: 1.6em 0 .5em; }
a { color: var(--accent-deep); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: var(--accent); }
img { max-width: 100%; height: auto; }
code, kbd { font-family: var(--mono); font-size: .85em; background: var(--paper-dim); padding: .1em .35em; border: 1px solid var(--gridline); }

.wrap { max-width: 1180px; margin: 0 auto; padding: 0 var(--gutter); }
.wrap-narrow { max-width: 860px; margin: 0 auto; padding: 0 var(--gutter); }

/* graph-paper field */
.gridfield {
  background-image:
    linear-gradient(var(--gridline) 1px, transparent 1px),
    linear-gradient(90deg, var(--gridline) 1px, transparent 1px);
  background-size: 22px 22px;
}

/* ---------- Header ---------- */
.masthead {
  position: sticky; top: 0; z-index: 60;
  background: rgba(253, 252, 248, .96);
  border-bottom: 2px solid var(--ink);
  backdrop-filter: blur(3px);
}
.masthead-bar { display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; height: 66px; }
.brandmark { display: flex; align-items: center; gap: .7rem; text-decoration: none; color: var(--ink); }
.brandmark svg { display: block; }
.brandmark-word { font-family: var(--display); font-weight: 700; font-size: 1.18rem; letter-spacing: .02em; text-transform: uppercase; white-space: nowrap; }
.brandmark-word small { display: block; font-family: var(--mono); font-size: .55rem; font-weight: 400; letter-spacing: .22em; color: var(--ink-soft); }

.mainnav { display: flex; align-items: center; }
.mainnav ul { display: flex; gap: 1.4rem; list-style: none; margin: 0; padding: 0; }
.mainnav a {
  font-size: .76rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase;
  color: var(--ink); text-decoration: none; padding: .4rem 0; border-bottom: 2px solid transparent;
}
.mainnav a:hover, .mainnav .current-menu-item > a { border-bottom-color: var(--accent); color: var(--ink); }
.nav-toggle { display: none; background: none; border: 1px solid var(--ink); padding: .45rem .6rem; font-family: var(--mono); font-size: .7rem; letter-spacing: .1em; cursor: pointer; }

@media (max-width: 920px) {
  .nav-toggle { display: block; }
  .mainnav { display: none; position: absolute; top: 66px; left: 0; right: 0; background: var(--paper); border-bottom: 2px solid var(--ink); }
  .mainnav.open { display: block; }
  .mainnav ul { flex-direction: column; gap: 0; padding: .5rem var(--gutter) 1rem; }
  .mainnav a { display: block; padding: .65rem 0; border-bottom: 1px solid var(--gridline); }
}

/* ---------- Hero ---------- */
.hero { padding: clamp(3rem, 7vw, 5.5rem) 0; border-bottom: 1px solid var(--hairline); position: relative; }
.hero-cols { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: 3rem; align-items: center; }
@media (max-width: 920px) { .hero-cols { grid-template-columns: 1fr; } }
.hero p.lede { font-size: 1.2rem; max-width: 38em; color: var(--ink-soft); }

.annot { font-family: var(--annot); font-size: 1.05rem; color: var(--ink-soft); }
.annot-tilt { display: inline-block; transform: rotate(-2.5deg); }

.btn {
  display: inline-block; padding: .8rem 1.5rem;
  font-family: var(--body); font-size: .78rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase;
  text-decoration: none; cursor: pointer; border: 1px solid var(--ink);
}
.btn-primary {
  background: var(--accent); color: #fff; border-color: var(--accent-deep);
  box-shadow: 3px 3px 0 var(--accent-deep);
}
.btn-primary:hover { color: #fff; transform: translate(1px, 1px); box-shadow: 2px 2px 0 var(--accent-deep); }
.btn-ghost { background: transparent; color: var(--ink); }
.btn-ghost:hover { background: var(--ink); color: var(--paper); }

/* ---------- Section furniture ---------- */
.section { padding: clamp(2.5rem, 6vw, 4.5rem) 0; }
.section-alt { background: #fff; border-top: 1px solid var(--hairline); border-bottom: 1px solid var(--hairline); }
.rulehead { display: flex; align-items: center; gap: 1.1rem; margin-bottom: 2.2rem; }
.rulehead h2 { margin: 0; text-transform: uppercase; letter-spacing: .01em; }
.rulehead .rule { flex: 1; height: 1px; background: var(--hairline); }
.rulehead .secno { font-family: var(--mono); font-size: .8rem; color: var(--accent-deep); letter-spacing: .1em; }

.figcap {
  font-family: var(--mono); font-size: .68rem; letter-spacing: .08em; text-transform: uppercase;
  color: var(--ink-soft); margin-top: .6rem;
}

/* plate = bordered technical panel */
.plate { border: 1px solid var(--ink); background: #fff; }
.plate-shadow { box-shadow: 4px 4px 0 var(--ink); }
.plate-pad { padding: 1.6rem; }

/* ledger grid (bordered cells, no rounded cards) */
.ledger { display: grid; border-top: 1px solid var(--ink); border-left: 1px solid var(--ink); }
.ledger-3 { grid-template-columns: repeat(3, 1fr); }
.ledger-2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 920px) { .ledger-3 { grid-template-columns: 1fr; } .ledger-2 { grid-template-columns: 1fr; } }
.ledger-cell { padding: 1.7rem; border-right: 1px solid var(--ink); border-bottom: 1px solid var(--ink); background: #fff; }
.ledger-cell:nth-child(even) { background: rgba(246, 244, 236, .55); }
.ledger-cell h3 { margin: .4rem 0 .7rem; text-transform: uppercase; font-weight: 700; font-size: 1.12rem; }
.ledger-cell p { font-size: .95rem; color: var(--ink-soft); margin: 0 0 1.1rem; }
.cell-link {
  font-size: .72rem; font-weight: 700; letter-spacing: .16em; text-transform: uppercase;
  color: var(--accent-deep); text-decoration: none;
}
.cell-link::after { content: ' \2192'; }
.cell-link:hover { color: var(--accent); }

/* ---------- Data tables ---------- */
.datatable-frame { border: 2px solid var(--ink); box-shadow: 4px 4px 0 var(--ink); overflow-x: auto; background: #fff; }
table.datatable { width: 100%; border-collapse: collapse; font-size: .88rem; }
table.datatable th {
  background: var(--ink); color: #fff; text-align: left;
  font-size: .7rem; letter-spacing: .12em; text-transform: uppercase;
  padding: .7rem .9rem; border-right: 1px solid var(--ink-soft);
}
table.datatable td { padding: .65rem .9rem; border-bottom: 1px solid var(--gridline); border-right: 1px solid var(--gridline); font-variant-numeric: tabular-nums; }
table.datatable tbody tr:hover { background: var(--accent-wash); }
table.datatable td.num { font-family: var(--mono); font-size: .82rem; }

/* ---------- Article / entry content ---------- */
.entry { padding: clamp(2rem, 5vw, 3.5rem) 0; }
.entry-header { max-width: var(--measure); margin: 0 auto 2rem; }
.entry-meta { font-family: var(--mono); font-size: .7rem; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-soft); display: flex; gap: 1.2rem; flex-wrap: wrap; }
.entry-content { max-width: var(--measure); margin: 0 auto; }
.entry-figure { max-width: var(--measure); margin: 0 auto 2rem; border: 1px solid var(--ink); }
.entry-figure img { display: block; width: 100%; height: auto; }
.entry-aside { max-width: var(--measure); margin: 3rem auto 0; }
.entry .worksheet-head { max-width: var(--measure); margin-left: auto; margin-right: auto; }
.entry-content h2 { padding-top: .4em; border-top: 1px solid var(--hairline); }
.entry-content table { width: 100%; border-collapse: collapse; font-size: .92rem; margin: 1.5em 0; }
.entry-content table th { background: var(--ink); color: #fff; padding: .55rem .8rem; text-align: left; font-size: .75rem; text-transform: uppercase; letter-spacing: .08em; }
.entry-content table td { padding: .55rem .8rem; border-bottom: 1px solid var(--gridline); border-right: 1px solid var(--gridline); }
.entry-content table tr td:first-child { border-left: 1px solid var(--gridline); }
.entry-content blockquote { margin: 1.5em 0; padding: 1em 1.4em; border: 1px solid var(--hairline); border-left: 3px solid var(--accent); background: #fff; font-style: normal; }
.entry-content figure { margin: 2em 0; }
.entry-content ul, .entry-content ol { padding-left: 1.4em; }
.entry-content li { margin-bottom: .4em; }

/* site-specific callout: "margin note" — annotated field-note, not a tinted box */
.fieldnote { position: relative; margin: 1.8em 0; padding: 1.1em 1.3em 1.1em 2.6em; border: 1px solid var(--ink); background: #fff; }
.fieldnote::before {
  content: '\270E'; position: absolute; left: .85em; top: .95em;
  font-size: 1rem; color: var(--accent-deep);
}
.fieldnote .fieldnote-tag { font-family: var(--annot); font-size: 1.1rem; color: var(--accent-deep); display: block; margin-bottom: .15em; }
.fieldnote p { margin: 0; font-size: .95rem; }

/* breadcrumbs */
.crumbs { font-family: var(--mono); font-size: .68rem; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-soft); padding: 1rem 0 0; }
.crumbs a { color: var(--ink-soft); }

/* ---------- FAQ accordions ---------- */
.faqset details { border: 1px solid var(--ink); background: #fff; margin-bottom: .6rem; }
.faqset summary {
  cursor: pointer; padding: .9rem 1.2rem; font-weight: 700; font-size: 1rem;
  list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 1rem;
}
.faqset summary::-webkit-details-marker { display: none; }
.faqset summary::after { content: '+'; font-family: var(--mono); color: var(--accent-deep); font-size: 1.1rem; }
.faqset details[open] summary::after { content: '\2212'; }
.faqset details[open] summary { border-bottom: 1px solid var(--gridline); }
.faqset .faq-a { padding: .9rem 1.2rem; font-size: .97rem; }
.faqset .faq-a > :first-child { margin-top: 0; }
.faqset .faq-a > :last-child { margin-bottom: 0; }

/* ---------- Calculator / tool UI ---------- */
.tool-shell { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 2rem; max-width: var(--measure); margin: 2rem auto; }
@media (max-width: 920px) { .tool-shell { grid-template-columns: 1fr; } }
.tool-inputs { border: 2px solid var(--ink); background: #fff; padding: 1.5rem; align-self: start; }
.tool-inputs h3 { margin-top: 0; text-transform: uppercase; font-size: 1rem; letter-spacing: .04em; }
.tool-field { margin-bottom: 1.05rem; }
.tool-field label { display: block; font-size: .78rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; margin-bottom: .3rem; }
.tool-field .hint { font-size: .78rem; color: var(--ink-soft); font-weight: 400; text-transform: none; letter-spacing: 0; }
.tool-field input[type="number"], .tool-field select {
  width: 100%; padding: .55rem .7rem; font-family: var(--mono); font-size: .95rem;
  border: 1px solid var(--ink); background: var(--paper); color: var(--ink);
}
.tool-field input:focus, .tool-field select:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
.tool-field .unit { font-family: var(--mono); font-size: .75rem; color: var(--ink-soft); margin-left: .4rem; }
.tool-actions { display: flex; gap: .8rem; flex-wrap: wrap; margin-top: 1.3rem; }

.tool-results { min-width: 0; }
.tool-results .resultcard { border: 2px solid var(--ink); box-shadow: 4px 4px 0 var(--ink); background: #fff; padding: 1.5rem; margin-bottom: 1.5rem; }
.result-headline { display: flex; flex-wrap: wrap; gap: 1.5rem; }
.result-stat { min-width: 9rem; }
.result-stat .stat-label { font-family: var(--mono); font-size: .65rem; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-soft); }
.result-stat .stat-value { font-family: var(--display); font-size: 2rem; font-weight: 700; color: var(--accent-deep); }
.result-stat .stat-unit { font-family: var(--mono); font-size: .8rem; color: var(--ink-soft); }

.steps-ledger { margin-top: 1.2rem; }
.steps-ledger .step { border: 1px solid var(--hairline); border-left: 3px solid var(--accent); background: #fff; padding: .9rem 1.1rem; margin-bottom: .6rem; }
.steps-ledger .step-no { font-family: var(--mono); font-size: .68rem; letter-spacing: .1em; color: var(--accent-deep); text-transform: uppercase; }
.steps-ledger .step-title { font-weight: 700; margin: .15rem 0 .3rem; }
.steps-ledger .step-math { font-family: var(--mono); font-size: .85rem; background: var(--paper-dim); border: 1px solid var(--gridline); padding: .45rem .65rem; margin: .35rem 0; overflow-x: auto; white-space: pre-wrap; }
.steps-ledger .step-note { font-size: .88rem; color: var(--ink-soft); }

.tool-warn { border: 1px solid var(--accent-deep); background: var(--accent-wash); padding: .8rem 1.1rem; font-size: .92rem; margin: .8rem 0; }
.tool-ok { border: 1px solid var(--good); background: #EAF4EE; padding: .8rem 1.1rem; font-size: .92rem; margin: .8rem 0; }

/* selector wizard */
.selector-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: .9rem; }
@media (max-width: 700px) { .selector-grid { grid-template-columns: 1fr; } }
.bmp-result { border: 1px solid var(--ink); background: #fff; margin-bottom: .8rem; }
.bmp-result-head { display: flex; justify-content: space-between; align-items: center; gap: 1rem; padding: .85rem 1.1rem; }
.bmp-result-head h4 { margin: 0; font-size: 1.05rem; text-transform: uppercase; }
.bmp-score { font-family: var(--mono); font-size: .78rem; padding: .25rem .6rem; border: 1px solid var(--ink); white-space: nowrap; }
.bmp-score.s-good { background: #EAF4EE; border-color: var(--good); color: var(--good); }
.bmp-score.s-mid { background: var(--accent-wash); border-color: var(--accent-deep); color: var(--accent-deep); }
.bmp-result-body { padding: 0 1.1rem .9rem; font-size: .92rem; color: var(--ink-soft); }
.bmp-flags { font-family: var(--mono); font-size: .72rem; }
.bmp-flags li { margin-bottom: .25rem; }

/* db filter bar */
.filterbar { display: flex; gap: 1rem; flex-wrap: wrap; align-items: flex-end; border: 1px solid var(--ink); background: #fff; padding: 1rem 1.2rem; margin-bottom: 1.4rem; }
.filterbar .tool-field { margin: 0; min-width: 12rem; flex: 1; }

/* embed snippet block */
.embedbox { margin: 2rem 0; }
.embedbox textarea {
  width: 100%; height: 5.2rem; font-family: var(--mono); font-size: .72rem;
  border: 1px solid var(--ink); background: var(--paper-dim); padding: .6rem; resize: vertical;
}
.embedbox .figcap { margin-top: .3rem; }

/* ---------- Footer ---------- */
.colophon { background: var(--ink); color: #B9C3D2; margin-top: 4rem; }
.colophon-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 2.5rem; padding: 3rem 0 2rem; }
@media (max-width: 920px) { .colophon-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px) { .colophon-grid { grid-template-columns: 1fr; } }
.colophon h4 { color: #fff; font-family: var(--mono); font-size: .7rem; letter-spacing: .18em; text-transform: uppercase; margin: 0 0 1rem; opacity: .65; }
.colophon ul { list-style: none; margin: 0; padding: 0; }
.colophon li { margin-bottom: .5rem; }
.colophon a { color: #D7DEE8; text-decoration: none; font-size: .9rem; }
.colophon a:hover { color: var(--accent); }
.colophon .about-blurb { font-size: .88rem; line-height: 1.7; max-width: 30em; }
.colophon-base { border-top: 1px solid #3A4A62; padding: 1.2rem 0 1.6rem; font-family: var(--mono); font-size: .66rem; letter-spacing: .12em; text-transform: uppercase; opacity: .55; display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }

/* ---------- Archive listings ---------- */
.doclist { border-top: 1px solid var(--ink); }
.docrow { display: grid; grid-template-columns: minmax(0, 3fr) minmax(0, 7fr) auto; gap: 1.5rem; align-items: baseline; padding: 1.1rem 0; border-bottom: 1px solid var(--gridline); }
@media (max-width: 700px) { .docrow { grid-template-columns: 1fr; gap: .3rem; } }
.docrow h3 { margin: 0; font-size: 1.12rem; }
.docrow h3 a { color: var(--ink); text-decoration: none; }
.docrow h3 a:hover { color: var(--accent-deep); }
.docrow .doc-extract { font-size: .92rem; color: var(--ink-soft); margin: 0; }
.docrow .doc-id { font-family: var(--mono); font-size: .68rem; color: var(--ink-soft); letter-spacing: .08em; white-space: nowrap; }

/* pagination */
.pager { display: flex; gap: .5rem; margin: 2.5rem 0; font-family: var(--mono); font-size: .8rem; }
.pager .page-numbers { padding: .45rem .8rem; border: 1px solid var(--ink); text-decoration: none; color: var(--ink); }
.pager .page-numbers.current { background: var(--ink); color: #fff; }

/* ---------- 404 / search ---------- */
.searchform { display: flex; gap: .6rem; max-width: 32rem; }
.searchform input[type="search"] { flex: 1; padding: .6rem .8rem; border: 1px solid var(--ink); font-family: var(--mono); background: #fff; }

/* ---------- Print: design worksheet ---------- */
@media print {
  .masthead, .colophon, .tool-actions, .crumbs, .embedbox, .mainnav, .nav-toggle, .no-print { display: none !important; }
  body { background: #fff; font-size: 11pt; }
  .tool-shell { grid-template-columns: 1fr; gap: 1rem; }
  .tool-inputs, .resultcard { border: 1.5pt solid #000 !important; box-shadow: none !important; }
  .worksheet-head { display: block !important; border-bottom: 2pt solid #000; margin-bottom: 1rem; padding-bottom: .6rem; }
  .steps-ledger .step { break-inside: avoid; }
  a { color: #000; text-decoration: none; }
}
.worksheet-head { display: none; font-family: var(--mono); font-size: .75rem; }
.worksheet-head .ws-title { font-family: var(--display); font-size: 1.4rem; font-weight: 700; }