/* EDDM quick reference. Look: a blueprint drafting set. Deep drafting blue sheets with white linework,
   a fine grid, dimension lines, sheet numbers and a title block. Reading pages sit on pale drafting paper
   with a faint blue grid. Square geometry, hairline rules, monospaced labels. Prefix bp-. */
@font-face { font-family: "Space Grotesk"; src: url("/assets/fonts/SpaceGrotesk-400.woff2") format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: "Space Grotesk"; src: url("/assets/fonts/SpaceGrotesk-700.woff2") format("woff2"); font-weight: 700; font-display: swap; }
@font-face { font-family: "JetBrains Mono"; src: url("/assets/fonts/JetBrainsMono-500.woff2") format("woff2"); font-weight: 500; font-display: swap; }

:root {
  --bp-blue: #0f2f57;
  --bp-blue-2: #173f71;
  --bp-line: rgba(255, 255, 255, .86);
  --bp-grid-dark: rgba(255, 255, 255, .07);
  --bp-paper: #f3f6fa;
  --bp-paper-2: #ffffff;
  --bp-grid: #e1e9f3;
  --bp-ink: #10213b;
  --bp-ink-2: #4a5d78;
  --bp-rule: #b9c8db;
  --bp-accent: #1b63b5;
  --bp-red: #c8372d;
  --bp-ok: #17795e;
  --bp-amber: #f2b33d;
  --bp-sans: "Space Grotesk", "Segoe UI", system-ui, -apple-system, sans-serif;
  --bp-mono: "JetBrains Mono", ui-monospace, Menlo, Consolas, monospace;
  --bp-max: 1100px;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bp-blue: #0a2240;
    --bp-blue-2: #12325c;
    --bp-paper: #0d1a2c;
    --bp-paper-2: #12233a;
    --bp-grid: #15263d;
    --bp-ink: #e4ecf7;
    --bp-ink-2: #9fb2cb;
    --bp-rule: #2b4466;
    --bp-accent: #6fb1ff;
    --bp-red: #ff7a6e;
    --bp-ok: #4fd1a5;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bp-paper); color: var(--bp-ink); font: 17px/1.62 var(--bp-sans); overflow-x: clip; }
img, svg { max-width: 100%; height: auto; }
a { color: var(--bp-accent); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px dashed var(--bp-amber); outline-offset: 3px; }
sup { font-size: .55em; vertical-align: super; line-height: 0; }
.bp-skip { position: absolute; left: -999px; }
.bp-skip:focus { left: 12px; top: 12px; z-index: 40; background: var(--bp-paper-2); padding: 8px 12px; }
.bp-wrap { max-width: var(--bp-max); margin: 0 auto; padding: 0 24px; }
.bp-small { font-size: .82rem; color: var(--bp-ink-2); }

/* header */
.bp-header { background: var(--bp-blue); color: #fff; border-bottom: 1px solid var(--bp-line); }
.bp-header__in { display: flex; align-items: center; justify-content: space-between; gap: 18px; flex-wrap: wrap; padding-top: 12px; padding-bottom: 12px; }
.bp-brand { display: inline-flex; align-items: center; gap: 10px; color: #fff; text-decoration: none; font-weight: 700; font-size: 1.3rem; letter-spacing: .02em; }
.bp-brand small { font: 500 .7rem var(--bp-mono); letter-spacing: .14em; text-transform: uppercase; opacity: .75; }
.bp-mark { color: #fff; }
.bp-nav { list-style: none; display: flex; flex-wrap: wrap; gap: 4px; margin: 0; padding: 0; }
.bp-nav a { display: block; color: #fff; text-decoration: none; font: 500 .8rem var(--bp-mono); letter-spacing: .06em; text-transform: uppercase; padding: 7px 10px; border: 1px solid transparent; }
.bp-nav a:hover, .bp-nav a[aria-current] { border-color: var(--bp-line); }

/* hero: the blueprint sheet */
.bp-hero { position: relative; background-color: var(--bp-blue); color: #fff;
  background-image: linear-gradient(var(--bp-grid-dark) 1px, transparent 1px), linear-gradient(90deg, var(--bp-grid-dark) 1px, transparent 1px),
    linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
  background-size: 96px 96px, 96px 96px, 24px 24px, 24px 24px; }
.bp-hero::after { content: ""; position: absolute; inset: 14px; border: 1px solid rgba(255,255,255,.35); pointer-events: none; }
.bp-hero__in { display: grid; grid-template-columns: 1fr auto; gap: 32px; align-items: end; padding-top: 52px; padding-bottom: 46px; position: relative; z-index: 1; }
.bp-hero--home .bp-hero__in { padding-top: 76px; padding-bottom: 64px; }
.bp-hero h1 { font-size: clamp(2rem, 4.6vw, 3.3rem); line-height: 1.08; margin: 0 0 14px; letter-spacing: -.01em; }
.bp-hero--home h1 { font-size: clamp(2.4rem, 6vw, 4.2rem); }
.bp-lede { font-size: 1.15rem; max-width: 40em; margin: 0; color: rgba(255,255,255,.88); }
.bp-kicker { font: 500 .78rem var(--bp-mono); letter-spacing: .16em; text-transform: uppercase; color: var(--bp-amber); margin: 0 0 10px; }
.bp-crumbs { font: 500 .75rem var(--bp-mono); letter-spacing: .06em; margin-bottom: 16px; display: flex; gap: 8px; color: rgba(255,255,255,.7); }
.bp-crumbs a { color: #fff; }
.bp-tb { border-collapse: collapse; font: 500 .75rem var(--bp-mono); min-width: 230px; border: 1px solid var(--bp-line); }
.bp-tb th, .bp-tb td { border: 1px solid rgba(255,255,255,.45); padding: 6px 10px; text-align: left; }
.bp-tb th { text-transform: uppercase; letter-spacing: .12em; font-weight: 500; color: rgba(255,255,255,.65); width: 1%; white-space: nowrap; }

/* reading area: drafting paper */
.bp-paper { background-color: var(--bp-paper); background-image: linear-gradient(var(--bp-grid) 1px, transparent 1px), linear-gradient(90deg, var(--bp-grid) 1px, transparent 1px); background-size: 24px 24px; }
.bp-body { padding-top: 40px; padding-bottom: 64px; }
.bp-body > * { max-width: 760px; }
.bp-body > .bp-glance, .bp-body > .bp-formats, .bp-body > .bp-panel, .bp-body > .bp-fig, .bp-body > .bp-cheat { max-width: 960px; }
.bp-body h2 { font-size: 1.6rem; line-height: 1.2; margin: 2.2em 0 .6em; padding-top: .6em; border-top: 1px solid var(--bp-rule); display: flex; gap: 12px; align-items: baseline; }
.bp-body h2::before { content: "§"; font: 500 1rem var(--bp-mono); color: var(--bp-accent); }
.bp-body h3 { font-size: 1.15rem; margin: 1.6em 0 .4em; }
.bp-body > p, .bp-body > ul > li, .bp-body > ol > li { background: var(--bp-paper); }
.bp-body ul, .bp-body ol { padding-left: 1.3em; }
.bp-body li { margin: .3em 0; }
.bp-body li::marker { color: var(--bp-accent); }
.bp-plain { font-family: var(--bp-mono); }
code { font: 500 .88em var(--bp-mono); background: var(--bp-paper-2); border: 1px solid var(--bp-rule); padding: 1px 5px; }

/* tables */
.bp-table { overflow-x: auto; margin: 1.2em 0; border: 1px solid var(--bp-ink); background: var(--bp-paper-2); }
.bp-table table { border-collapse: collapse; width: 100%; font-size: .95rem; }
.bp-table th, .bp-table td { border-bottom: 1px solid var(--bp-rule); padding: 9px 12px; text-align: left; vertical-align: top; }
.bp-table th { font: 500 .74rem var(--bp-mono); letter-spacing: .1em; text-transform: uppercase; background: var(--bp-blue); color: #fff; }
.bp-table td + td, .bp-table th + th { border-left: 1px solid var(--bp-rule); }
.bp-table tr:last-child td { border-bottom: 0; }
.bp-ok { color: var(--bp-ok); font-weight: 700; }
.bp-no { color: var(--bp-red); font-weight: 700; }

/* home: at-a-glance tiles and sheet index */
.bp-glance { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; border: 1px solid var(--bp-ink); background: var(--bp-paper-2); margin: 0 0 1em; }
.bp-tile { display: flex; flex-direction: column; gap: 6px; padding: 22px 20px 18px; text-decoration: none; color: var(--bp-ink); border-right: 1px solid var(--bp-rule); border-bottom: 1px solid var(--bp-rule); position: relative; }
.bp-tile:nth-child(3n) { border-right: 0; }
.bp-tile:nth-last-child(-n+3) { border-bottom: 0; }
.bp-tile::before { content: ""; position: absolute; left: 20px; right: 20px; top: 12px; height: 7px; border-left: 1px solid var(--bp-accent); border-right: 1px solid var(--bp-accent);
  background: linear-gradient(var(--bp-accent), var(--bp-accent)) center / 100% 1px no-repeat; opacity: .55; }
.bp-tile__n { font-size: 2rem; font-weight: 700; letter-spacing: -.01em; margin-top: 8px; }
.bp-tile__l { font: 500 .74rem var(--bp-mono); letter-spacing: .08em; text-transform: uppercase; color: var(--bp-ink-2); }
.bp-tile:hover { background: var(--bp-paper); }
.bp-sheets { list-style: none; padding: 0 !important; border-top: 1px solid var(--bp-ink); }
.bp-sheets li { margin: 0; border-bottom: 1px solid var(--bp-rule); }
.bp-sheets a { display: grid; grid-template-columns: 52px 200px 1fr; gap: 12px; align-items: baseline; padding: 12px 4px; text-decoration: none; color: var(--bp-ink); }
.bp-sheets a:hover { background: var(--bp-paper-2); }
.bp-sheet__no { font: 500 .9rem var(--bp-mono); color: var(--bp-accent); }
.bp-sheet__name { font-weight: 700; }
.bp-sheet__blurb { color: var(--bp-ink-2); font-size: .95rem; }

/* drawings */
.bp-fig, .bp-format { margin: 1.4em 0; }
.bp-fig svg, .bp-format svg { display: block; background: var(--bp-blue); width: 100%; }
.bp-fig figcaption, .bp-format figcaption { font: 500 .78rem var(--bp-mono); color: var(--bp-ink-2); margin-top: 8px; }
.bp-formats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.bp-format { margin: 0; }
.bp-format figcaption { text-transform: uppercase; letter-spacing: .1em; }
.bp-line { fill: none; stroke: var(--bp-line); stroke-width: 1.5; }
.bp-line--max { stroke-width: 2; }
.bp-line--piece { stroke-width: 2; fill: rgba(255,255,255,.06); }
.bp-line--dash { stroke-dasharray: 6 5; stroke-width: 1.2; }
.bp-hatch { fill: rgba(200, 55, 45, .28); stroke: none; }
.bp-dim { color: var(--bp-amber); stroke: var(--bp-amber); stroke-width: 1.2; fill: none; }
.bp-dim text { fill: var(--bp-amber); stroke: none; font: 500 13px var(--bp-mono); }
.bp-dim__bg { fill: var(--bp-blue); stroke: none; }
.bp-note { fill: #fff; font: 700 14px var(--bp-sans); letter-spacing: .12em; }
.bp-note--sm { font: 500 11px var(--bp-mono); letter-spacing: .02em; fill: rgba(255,255,255,.75); }
.bp-piece { fill: rgba(242, 179, 61, .2); stroke: var(--bp-amber); stroke-width: 2; }
.bp-piece--bad { fill: rgba(255, 122, 110, .25); stroke: #ff8a7e; }

/* calculators: instrument panels */
.bp-panel { border: 1px solid var(--bp-ink); background: var(--bp-paper-2); padding: 22px 22px 18px; margin: 1.2em 0 1.6em; position: relative; }
.bp-panel::before { content: ""; position: absolute; inset: -7px 14px auto auto; width: 60px; height: 12px; background: var(--bp-amber); }
.bp-panel__t { font: 500 .78rem var(--bp-mono); letter-spacing: .16em; text-transform: uppercase; color: var(--bp-accent); margin: 0 0 14px; }
.bp-fields { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 14px 18px; }
.bp-field { display: flex; flex-direction: column; gap: 6px; }
.bp-field__l { font: 500 .74rem var(--bp-mono); letter-spacing: .08em; text-transform: uppercase; color: var(--bp-ink-2); }
.bp-field__in { display: flex; align-items: center; border: 1px solid var(--bp-ink); background: var(--bp-paper); }
.bp-field__in em { font: 500 .8rem var(--bp-mono); font-style: normal; padding: 0 10px; color: var(--bp-ink-2); }
.bp-field input, .bp-field select { font: 700 1.15rem var(--bp-sans); color: var(--bp-ink); background: transparent; border: 0; padding: 9px 10px; width: 100%; min-width: 0; }
.bp-field select { border: 1px solid var(--bp-ink); background: var(--bp-paper); font-size: .95rem; }
.bp-field small { font-size: .78rem; color: var(--bp-ink-2); }
.bp-field--check { flex-direction: row; align-items: center; gap: 10px; align-self: end; padding-bottom: 8px; font-size: .9rem; }
.bp-field--check input { width: 18px; height: 18px; accent-color: var(--bp-accent); }
.bp-out { display: grid; grid-template-columns: repeat(5, 1fr); margin: 20px 0 0; border-top: 1px solid var(--bp-ink); }
.bp-out div { padding: 12px 10px 0 0; }
.bp-out dt { font: 500 .7rem var(--bp-mono); letter-spacing: .1em; text-transform: uppercase; color: var(--bp-ink-2); }
.bp-out dd { margin: 4px 0 0; font-size: 1.35rem; font-weight: 700; }
.bp-out__total dd { color: var(--bp-accent); }
.bp-say { font-weight: 700; margin: 14px 0 0; }
.bp-size__draw { margin: 18px 0 8px; }
.bp-size__draw { background: var(--bp-blue); }
.bp-size__draw svg { width: 100%; max-width: 620px; margin: 0 auto; background: var(--bp-blue); display: block; }
.bp-tests { list-style: none; padding: 0 !important; margin: 10px 0 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 6px 18px; font-size: .92rem; }
.bp-tests li { display: flex; gap: 8px; background: none !important; }
.bp-tests b { font-family: var(--bp-mono); }
.bp-tests .is-ok b { color: var(--bp-ok); }
.bp-tests .is-bad b { color: var(--bp-red); }
.bp-bundles { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; align-items: flex-end; min-height: 40px; }
.bp-bundle { width: 64px; border: 1px solid var(--bp-ink); background: repeating-linear-gradient(0deg, var(--bp-paper) 0 3px, var(--bp-rule) 3px 4px); position: relative; }
.bp-bundle span { position: absolute; left: 0; right: 0; bottom: -22px; text-align: center; font: 500 .75rem var(--bp-mono); }
.bp-bundle::after { content: ""; position: absolute; left: 50%; top: 0; bottom: 0; border-left: 2px solid var(--bp-amber); }
.bp-bundles + .bp-say { margin-top: 34px; }
.bp-btn { font: 500 .85rem var(--bp-mono); letter-spacing: .08em; text-transform: uppercase; background: var(--bp-blue); color: #fff; border: 1px solid var(--bp-blue); padding: 10px 16px; cursor: pointer; }
.bp-btn:hover { background: var(--bp-blue-2); }

/* cheat sheet */
.bp-cheat { border: 2px solid var(--bp-ink); background: var(--bp-paper-2); padding: 0; }
.bp-cheat__head { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; background: var(--bp-blue); color: #fff; padding: 14px 18px; }
.bp-cheat__t { margin: 0; font-weight: 700; font-size: 1.3rem; }
.bp-cheat__d { margin: 0; font: 500 .78rem var(--bp-mono); align-self: center; }
.bp-cheat table { border-collapse: collapse; width: 100%; font-size: .95rem; }
.bp-cheat th, .bp-cheat td { padding: 8px 18px; border-bottom: 1px solid var(--bp-rule); text-align: left; vertical-align: top; }
.bp-cheat th { font: 500 .74rem var(--bp-mono); letter-spacing: .06em; text-transform: uppercase; width: 34%; color: var(--bp-ink-2); }
.bp-cheat__f { font: 500 .74rem var(--bp-mono); padding: 10px 18px; margin: 0; color: var(--bp-ink-2); }

/* faq + sources */
.bp-faq details { border-top: 1px solid var(--bp-rule); background: var(--bp-paper); }
.bp-faq details:last-child { border-bottom: 1px solid var(--bp-rule); }
.bp-faq summary { cursor: pointer; font-weight: 700; padding: 13px 0; list-style: none; display: flex; gap: 12px; }
.bp-faq summary::-webkit-details-marker { display: none; }
.bp-faq summary::before { content: "+"; font: 500 1rem var(--bp-mono); color: var(--bp-accent); width: 14px; }
.bp-faq details[open] summary::before { content: "−"; }
.bp-faq details > div { padding: 0 0 12px 26px; }
.bp-faq details p { margin: 0; }
.bp-sources { margin-top: 3em; border: 1px dashed var(--bp-rule); padding: 16px 20px; background: var(--bp-paper); }
.bp-sources__t { font: 500 .75rem var(--bp-mono); letter-spacing: .16em; text-transform: uppercase; margin: 0 0 6px; color: var(--bp-accent); }
.bp-sources ol { margin: 0 0 8px; font-size: .92rem; }

/* footer */
.bp-foot { background: var(--bp-blue); color: rgba(255,255,255,.85); padding: 40px 0 28px; font-size: .92rem; }
.bp-foot a { color: #fff; }
.bp-foot__grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 32px; margin-bottom: 26px; }
.bp-foot__name { font-weight: 700; font-size: 1.15rem; color: #fff; margin: 0 0 6px; }
.bp-foot__h { font: 500 .74rem var(--bp-mono); letter-spacing: .16em; text-transform: uppercase; color: var(--bp-amber); margin: 0 0 8px; }
.bp-foot__links, .bp-foot__list { list-style: none; padding: 0; margin: 12px 0 0; display: flex; flex-wrap: wrap; gap: 6px 16px; }
.bp-foot__list { columns: 2; display: block; margin: 0; }
.bp-foot__list li { margin: 0 0 6px; }
.bp-titleblock { width: 100%; border-collapse: collapse; font: 500 .74rem var(--bp-mono); border: 1px solid var(--bp-line); }
.bp-titleblock th, .bp-titleblock td { border: 1px solid rgba(255,255,255,.4); padding: 7px 10px; text-align: left; vertical-align: top; }
.bp-titleblock th { text-transform: uppercase; letter-spacing: .12em; color: rgba(255,255,255,.6); font-weight: 500; width: 1%; white-space: nowrap; }

@media (max-width: 860px) {
  .bp-hero__in { grid-template-columns: 1fr; }
  .bp-tb { min-width: 0; }
  .bp-formats { grid-template-columns: repeat(2, 1fr); }
  .bp-out { grid-template-columns: repeat(2, 1fr); }
  .bp-foot__grid { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  .bp-wrap { padding: 0 16px; }
  .bp-glance { grid-template-columns: repeat(2, 1fr); }
  .bp-tile { border-right: 1px solid var(--bp-rule) !important; border-bottom: 1px solid var(--bp-rule) !important; }
  .bp-tile:nth-child(2n) { border-right: 0 !important; }
  .bp-tile:nth-last-child(-n+2) { border-bottom: 0 !important; }
  .bp-tile__n { font-size: 1.5rem; }
  .bp-sheets a { grid-template-columns: 40px 1fr; }
  .bp-sheet__blurb { grid-column: 2; }
  .bp-hero::after { inset: 8px; }
  .bp-nav a { padding: 6px 7px; font-size: .72rem; }
  .bp-cheat th { width: 40%; padding: 8px 10px; }
  .bp-cheat td { padding: 8px 10px; }
}

@media print {
  .bp-header, .bp-foot, .bp-hero, .bp-btn, .bp-sources, .bp-body > :not(.bp-cheat) { display: none !important; }
  body, .bp-paper { background: #fff !important; color: #000; }
  .bp-cheat { border-color: #000; }
  .bp-cheat__head { background: #fff !important; color: #000 !important; border-bottom: 2px solid #000; }
}