/* ContainersAndBoxes.com — see CLAUDE.md "Design" for the token rationale. */
:root {
  --ink: #17202A;
  --ink-soft: #6B7280;
  --line: #D9DEE5;
  --paper: #FFFFFF;
  --paper-tint: #F6F8FA;
  --dim: #1F5FBF;
  --dim-soft: #E3ECFA;
  --tape: #F5C400;
  --radius: 3px;
  --font: "Archivo", "Helvetica Neue", Arial, sans-serif;
  --measure: 62ch;
}
*, *::before, *::after { box-sizing: border-box; }
html { color-scheme: light; }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font-family: var(--font); font-size: 17px; line-height: 1.5;
  font-variant-numeric: tabular-nums; -webkit-font-smoothing: antialiased;
}
a { color: var(--dim); text-underline-offset: 3px; }
a:hover { color: var(--ink); }
:focus-visible { outline: 3px solid var(--tape); outline-offset: 2px; }
img { max-width: 100%; height: auto; }
h1, h2, h3 { font-weight: 700; line-height: 1.1; letter-spacing: -0.01em; margin: 0 0 .5rem; }
h1 { font-size: clamp(2rem, 5vw, 3.4rem); font-stretch: 112%; }
h2 { font-size: clamp(1.35rem, 2.6vw, 1.9rem); margin-top: 2.5rem; }
h3 { font-size: 1.1rem; }
p { max-width: var(--measure); margin: 0 0 1rem; }
.wrap { max-width: 1100px; margin: 0 auto; padding-inline: 20px; }
.muted { color: var(--ink-soft); }
.small { font-size: .9rem; }

/* Header */
.site-head { border-bottom: 1px solid var(--line); }
.site-head .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: var(--ink); text-decoration: none; font-weight: 700; font-size: 1.15rem; letter-spacing: -0.01em; }
.brand svg { width: 30px; height: 30px; }
.site-nav { display: flex; gap: 1.4rem; font-size: .95rem; }
.site-nav a { color: var(--ink); text-decoration: none; padding-block: .3rem; border-bottom: 2px solid transparent; }
.site-nav a[aria-current="page"], .site-nav a:hover { border-bottom-color: var(--dim); }

main { padding-block: 2.5rem 4rem; }
.site-foot { border-top: 1px solid var(--line); padding-block: 1.5rem 3rem; font-size: .9rem; color: var(--ink-soft); }
.site-foot .wrap { display: flex; flex-wrap: wrap; gap: 1rem 2rem; justify-content: space-between; }
.site-foot a { color: inherit; }

/* Hero */
.hero { display: grid; gap: 1rem; margin-bottom: 2rem; }
.hero .lede { font-size: 1.2rem; color: var(--ink-soft); }

/* The dimension box form: an isometric box drawn in SVG, inputs sitting on its edges. */
.dimbox { position: relative; border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper-tint); padding: 1.5rem; }
.dimbox-stage { position: relative; }
.dim { display: flex; flex-direction: column; gap: .3rem; }
.dim-label { font-weight: 600; font-size: .95rem; color: var(--dim); }
.range { display: inline-flex; align-items: center; gap: .35rem; background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: .25rem .5rem; }
.range input { width: 4.2em; border: 0; background: transparent; font: inherit; font-size: 1.05rem; padding: .25rem 0; text-align: right; color: var(--ink); }
.range input::placeholder { color: #A7AEB8; }
.range .to { color: var(--ink-soft); }
.range .unit { color: var(--ink-soft); font-size: .9rem; padding-left: .2rem; border-left: 1px solid var(--line); }
.range input:focus { outline: none; }
.range:focus-within { border-color: var(--dim); box-shadow: 0 0 0 3px var(--dim-soft); }
.dimbox-extra { display: flex; flex-wrap: wrap; gap: 1rem 1.5rem; align-items: end; margin-top: 1.25rem; padding-top: 1.25rem; border-top: 1px solid var(--line); }
.field { display: flex; flex-direction: column; gap: .3rem; font-size: .95rem; }
.field select { font: inherit; padding: .5rem .6rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); color: var(--ink); min-width: 10rem; }
.btn { font: inherit; font-weight: 600; background: var(--ink); color: var(--paper); border: 0; border-radius: var(--radius); padding: .75rem 1.4rem; cursor: pointer; }
.btn:hover { background: var(--dim); }
.btn-quiet { background: transparent; color: var(--ink); border: 1px solid var(--line); }
.btn-quiet:hover { background: var(--paper-tint); color: var(--ink); }
.dimbox-help { margin: 1rem 0 0; font-size: .9rem; color: var(--ink-soft); max-width: none; }


/* Example searches: rows, not cards */
.examples { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.examples li { border-bottom: 1px solid var(--line); }
.examples a { display: grid; grid-template-columns: 1fr auto; gap: .25rem 1.5rem; padding: 1rem 0; color: var(--ink); text-decoration: none; align-items: baseline; }
.examples a:hover .ex-title { color: var(--dim); }
.ex-title { font-weight: 600; font-size: 1.1rem; }
.ex-blurb { grid-column: 1; color: var(--ink-soft); font-size: .95rem; }
.ex-dims { grid-column: 2; grid-row: 1 / span 2; color: var(--dim); white-space: nowrap; font-size: .95rem; align-self: center; }
@media (max-width: 600px) { .examples a { grid-template-columns: 1fr; } .ex-dims { grid-column: 1; grid-row: auto; } }

/* Results */
.results-head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: .5rem 1.5rem; margin: 1.5rem 0 1rem; }
.results-head h1 { font-size: clamp(1.5rem, 3vw, 2.1rem); }
.criteria { color: var(--ink-soft); }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); gap: 1.25rem; list-style: none; margin: 0; padding: 0; }
.tile { border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); display: flex; flex-direction: column; overflow: hidden; }
.tile a { color: inherit; text-decoration: none; display: flex; flex-direction: column; height: 100%; }
.tile a:hover .tile-name { color: var(--dim); }
.tile-img { aspect-ratio: 1; background: var(--paper-tint); display: grid; place-items: center; overflow: hidden; }
.tile-img img { width: 100%; height: 100%; object-fit: contain; }
.tile-img svg { width: 40%; height: auto; opacity: .5; }
.tile-body { padding: .8rem .9rem 1rem; display: flex; flex-direction: column; gap: .3rem; }
.tile-dims { color: var(--dim); font-weight: 600; }
.tile-name { font-size: .95rem; line-height: 1.35; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.tile-meta { font-size: .85rem; color: var(--ink-soft); margin-top: auto; padding-top: .3rem; }
.empty { border: 1px dashed var(--line); border-radius: var(--radius); padding: 2rem; max-width: var(--measure); }
.pagination { display: flex; flex-wrap: wrap; gap: .3rem; list-style: none; padding: 0; margin: 2rem 0 0; }
.pagination a, .pagination span { display: inline-block; padding: .4rem .7rem; border: 1px solid var(--line); border-radius: var(--radius); text-decoration: none; color: var(--ink); }
.pagination .active span { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.pagination .disabled span { color: var(--ink-soft); }

/* Content pages */
.prose img { border: 1px solid var(--line); border-radius: var(--radius); margin: .5rem 0 1.5rem; display: block; }
.prose ul { max-width: var(--measure); padding-left: 1.2rem; }
.prose ul li { margin-bottom: .25rem; }
.two-col { columns: 2; column-gap: 2rem; max-width: 40rem; }
@media (max-width: 600px) { .two-col { columns: 1; } }

@media (prefers-reduced-motion: no-preference) {
  .btn, .site-nav a, .range { transition: background-color .15s, border-color .15s, box-shadow .15s; }
}

/* Results page: same form, smaller drawing */
@media (min-width: 760px) {
  .dimbox-compact .dimbox-stage { max-width: 560px; }
  .dimbox-compact { padding: 1rem 1.5rem; }
}

/* Sliders, drawing and badges (added with the slider form) */
.dimbox-stage { display: grid; gap: 1.5rem; }
@media (min-width: 760px) { .dimbox-stage { grid-template-columns: 3fr 2fr; align-items: start; } }
.dimbox-drawing svg { width: 100%; height: auto; display: block; }
.dimbox-caption { font-size: .85rem; color: var(--ink-soft); margin: .25rem 0 0; text-align: center; max-width: none; }
.dimbox-sliders { display: grid; gap: 1.1rem 1.5rem; grid-template-columns: 1fr auto; align-items: start; }
.dimbox-sliders .dim-vertical { grid-column: 2; grid-row: 1 / span 2; display: flex; flex-direction: column; align-items: center; gap: .3rem; }
.dim-vertical .dim-label { flex-direction: column; align-items: center; gap: .1rem; text-align: center; }
.dual-vbox { width: 32px; height: 120px; overflow: hidden; display: flex; align-items: center; justify-content: center; }
/* The vertical slider is the horizontal one rotated a quarter turn, so the fill and JS stay identical; max ends up at the top. */
.dual-vertical { width: 120px; height: 32px; flex: 0 0 auto; transform: rotate(-90deg); margin: 0; }
fieldset.dim { border: 0; margin: 0; padding: 0; min-width: 0; }
.dim-label { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; width: 100%; padding: 0; }
.dim-readout { color: var(--ink); font-weight: 600; }
.dual { position: relative; height: 32px; margin: .2rem 0 .3rem; }
.dual-track { position: absolute; left: 0; right: 0; top: 14px; height: 4px; background: var(--line); border-radius: 2px; }
.dual-fill { position: absolute; top: 0; bottom: 0; background: var(--dim); border-radius: 2px; }
.dual input[type=range] { position: absolute; left: 0; right: 0; top: 0; width: 100%; height: 32px; margin: 0; background: transparent; -webkit-appearance: none; appearance: none; pointer-events: none; }
.dual input[type=range]::-webkit-slider-runnable-track { background: transparent; height: 32px; }
.dual input[type=range]::-moz-range-track { background: transparent; height: 32px; }
.dual input[type=range]::-webkit-slider-thumb { -webkit-appearance: none; appearance: none; pointer-events: auto; width: 20px; height: 20px; margin-top: 6px; border-radius: 50%; background: var(--paper); border: 2px solid var(--ink); cursor: grab; }
.dual input[type=range]::-moz-range-thumb { pointer-events: auto; width: 16px; height: 16px; border-radius: 50%; background: var(--paper); border: 2px solid var(--ink); cursor: grab; }
.dual input[type=range]:focus-visible { outline: none; }
.dual input[type=range]:focus-visible::-webkit-slider-thumb { outline: 3px solid var(--tape); outline-offset: 2px; }
.dual input[type=range]:focus-visible::-moz-range-thumb { outline: 3px solid var(--tape); outline-offset: 2px; }
.tile-img { position: relative; }
.fits { position: absolute; top: .5rem; left: .5rem; background: var(--tape); color: var(--ink); font-weight: 700; font-size: 1.05rem; line-height: 1; padding: .4rem .5rem; border-radius: var(--radius); z-index: 1; }
@media (min-width: 760px) { .dimbox-compact .dimbox-stage { max-width: none; } }

/* Unit switch: a two-segment control */
.unit-switch { grid-column: 1 / -1; justify-self: end; display: inline-flex; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.unit-switch button { font: inherit; font-size: .85rem; padding: .3rem .7rem; border: 0; background: var(--paper); color: var(--ink-soft); cursor: pointer; }
.unit-switch button + button { border-left: 1px solid var(--line); }
.unit-switch button[aria-pressed="true"] { background: var(--ink); color: var(--paper); }
.unit-switch button:focus-visible { outline-offset: -3px; }
.dimbox-sliders .dim-vertical { grid-row: 2 / span 2; }

/* Mobile: tighter top, no frame around the tool, height slider pulled in from the screen edge */
@media (max-width: 759px) {
  .site-head .wrap { min-height: 52px; row-gap: 0; }
  .site-nav { gap: 1rem; font-size: .9rem; }
  main { padding-block: 1rem 3rem; }
  .hero { gap: .35rem; margin-bottom: 1rem; }
  .hero h1 { font-size: 1.8rem; }
  .hero .lede { font-size: 1rem; margin-bottom: 0; }
  .dimbox { border: 0; background: transparent; padding: 0; border-radius: 0; }
  .dimbox-stage { gap: .75rem; }
  .dimbox-caption { margin-top: 0; }
  .dimbox-sliders { gap: .8rem 1rem; padding-right: 1.5rem; }
  .dimbox-extra { margin-top: 1rem; padding-top: 1rem; }
  .dimbox-help { margin-top: .6rem; }
  h2 { margin-top: 1.75rem; }
  .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .75rem; }
  .tile-body { padding: .6rem .6rem .8rem; gap: .2rem; }
  .tile-dims { font-size: .95rem; }
  .tile-name { font-size: .85rem; }
  .fits { font-size: .95rem; padding: .3rem .4rem; }
}

/* Guide pages */
.guide-hero { margin-bottom: 1.25rem; }
.guide-figure { margin: 0 0 1.5rem; }
.guide-figure img { display: block; width: 100%; height: auto; aspect-ratio: 7 / 4; object-fit: cover; border-radius: var(--radius); border: 1px solid var(--line); }
.guide-figure figcaption { margin-top: .35rem; }
.guide-body { margin-top: 2.5rem; }
.guide-body h2 { margin-top: 1.75rem; }
.guide .results-head h2 { margin-top: 0; }