/* HOPS: light theme is a plotted sheet, dark theme is AutoCAD model space. */

@font-face {
  font-family: "osifont";
  src: url("../fonts/osifont-lgpl3fe.woff") format("woff");
  font-display: swap;
}

:root {
  color-scheme: light dark;

  --paper: #ffffff;
  --paper-2: #f2f4f6;
  --ink: #1f2328;
  --ink-2: #59616b;
  --line: #d5dae0;
  --line-strong: #9aa3ad;
  --accent: #c0262d;
  --tile: #ffffff;
  --tile-ink: #1f2328;

  --font-draw: "osifont", "Segoe UI", system-ui, sans-serif;
  --font-body: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-cmd: ui-monospace, "Cascadia Mono", Consolas, "Liberation Mono", monospace;

  --step--1: 0.875rem;
  --step-0: 1.0625rem;
  --step-1: 1.3125rem;
  --step-2: 1.75rem;
  --step-3: 2.25rem;
  --step-4: clamp(2.5rem, 1.7rem + 3.6vw, 4rem);

  --wrap: 68rem;
  --gutter: clamp(16px, 4vw, 40px);
  --radius: 4px;
  --icon: 2.75rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #212830;
    --paper-2: #29313b;
    --ink: #e8ecf0;
    --ink-2: #a3adb8;
    --line: #3a434e;
    --line-strong: #5d6874;
    --accent: #ff6b61;
    --tile: #f4f6f8;
  }
}

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

html { -webkit-text-size-adjust: 100%; scroll-padding-top: 1.5rem; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: var(--step-0)/1.6 var(--font-body);
  overflow-x: hidden;
}

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

a { color: inherit; text-underline-offset: 0.2em; text-decoration-thickness: 1px; }
a:hover { color: var(--accent); }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

code, kbd { font-family: var(--font-cmd); font-size: 0.9em; }

code {
  padding: 0.1em 0.35em;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: var(--paper-2);
  overflow-wrap: anywhere;
}

kbd {
  padding: 0.05em 0.4em;
  border: 1px solid var(--line-strong);
  border-bottom-width: 2px;
  border-radius: 3px;
  white-space: nowrap;
}

.wrap {
  width: 100%;
  max-width: calc(var(--wrap) + 2 * var(--gutter));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.skip {
  position: absolute;
  left: 1rem; top: -4rem;
  padding: 0.5rem 0.9rem;
  background: var(--ink);
  color: var(--paper);
  z-index: 10;
}
.skip:focus { top: 1rem; }

/* Header */

.site-header { border-bottom: 1px solid var(--line); }

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4rem;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  text-decoration: none;
}
.brand-mark { font-family: var(--font-draw); font-size: 1.6rem; line-height: 1; letter-spacing: 0.04em; }
.brand-sub { color: var(--ink-2); font-size: var(--step--1); }

.site-nav { display: flex; align-items: center; gap: 1.25rem; }
.site-nav a:not(.btn) { text-decoration: none; font-size: 0.95rem; }
.site-nav a[aria-current="page"] { text-decoration: underline; }

/* Buttons */

.btn {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  padding: 0.7rem 1.15rem;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font: 600 1rem/1.3 var(--font-body);
  text-decoration: none;
  cursor: pointer;
}
.btn-primary { background: var(--ink); color: var(--paper); }
.btn-primary:hover { background: var(--accent); color: #fff; }
.btn-secondary { border-color: var(--line-strong); background: transparent; color: var(--ink); }
.btn-secondary:hover { border-color: var(--ink); color: var(--ink); }
.btn-small { padding: 0.4rem 0.8rem; font-size: 0.9rem; }
.site-nav .btn-small { background: var(--ink); color: var(--paper); }
.site-nav .btn-small:hover { background: var(--accent); color: #fff; }
.btn-meta { font-weight: 400; font-size: 0.8rem; opacity: 0.8; }

/* Hero */

.hero { padding-block: clamp(2rem, 5vw, 3.25rem) 1rem; }

.hero-text { max-width: 62rem; }

h1, h2 {
  font-family: var(--font-draw);
  font-weight: 400;
  letter-spacing: 0.01em;
  line-height: 1.1;
}

h1 { font-size: var(--step-4); margin: 0 0 1.25rem; }

.lead { font-size: var(--step-1); line-height: 1.5; margin: 0; max-width: 36em; }

.hero-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin: 1.75rem 0 0.9rem; }

.hero-note { margin: 0; color: var(--ink-2); font-size: 0.95rem; }
.hero-note + .hero-note { margin-top: 0.4rem; }

.hero-drawing { margin: clamp(1.75rem, 4vw, 2.75rem) 0 0; }

.drawing-frame { border: 1px solid var(--line); background: var(--paper); }

.drawing { display: block; width: 100%; height: auto; }

.hero-drawing figcaption {
  margin-top: 0.7rem;
  color: var(--ink-2);
  font-size: var(--step--1);
  max-width: 70ch;
}

.drawing .wall-fill { fill: url(#hatch); }
.drawing .hatch-line { stroke: var(--ink); stroke-width: 0.7; opacity: 0.4; }
.drawing .d { fill: none; stroke: var(--ink); stroke-width: 1; }
.drawing .wall { stroke-width: 1.6; }
.drawing .thin { stroke-width: 0.7; }
.drawing .dim { stroke: var(--accent); stroke-width: 0.7; }
.drawing .tick { stroke-width: 1.3; }
.drawing .dim-text { fill: var(--accent); font-family: var(--font-draw); font-size: 11px; text-anchor: middle; }
.drawing .callout { fill: var(--ink-2); font-family: var(--font-cmd); font-size: 10px; }
.drawing .leader { stroke: var(--ink-2); stroke-width: 0.6; }

@media (prefers-reduced-motion: no-preference) {
  .drawing .d {
    stroke-dasharray: 1;
    stroke-dashoffset: 1;
    animation: draw 0.7s cubic-bezier(0.4, 0, 0.2, 1) var(--t, 0s) forwards;
  }
  .drawing .wall-fill,
  .drawing .layer-text,
  .drawing .layer-callouts {
    opacity: 0;
    animation: appear 0.5s ease var(--t, 0s) forwards;
  }
  .drawing .wall-fill { animation-delay: calc(var(--t, 0s) + 0.45s); }
}

@keyframes draw { to { stroke-dashoffset: 0; } }
@keyframes appear { to { opacity: 1; } }

/* Sections */

.install-quick, .catalog { padding-block: clamp(2.5rem, 6vw, 4rem); }
.install-quick { margin-top: clamp(1.5rem, 4vw, 2.5rem); }
.catalog { padding-top: 0; }
.catalog::before {
  content: "";
  display: block;
  margin-bottom: clamp(2.5rem, 6vw, 4rem);
  border-top: 1px solid var(--line);
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem 2rem;
  margin-bottom: 1.75rem;
}
.section-head h2 { font-size: var(--step-3); margin: 0; }
.section-sub { margin: -0.75rem 0 1.75rem; color: var(--ink-2); max-width: 60ch; }
.link { color: var(--ink-2); }

/* Quick install: detail-marker bubbles, the content is a real sequence */

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: step;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 2rem;
}
.steps li { counter-increment: step; position: relative; padding-top: 3.5rem; }
.steps li::before {
  content: counter(step);
  position: absolute;
  top: 0; left: 0;
  width: 2.6rem; height: 2.6rem;
  display: grid;
  place-items: center;
  border: 1.5px solid var(--ink);
  border-radius: 50%;
  padding-top: 0.2rem;
  font: 1.35rem/1 var(--font-draw);
}
.steps h3 { margin: 0 0 0.35rem; font-size: var(--step-0); }
.steps p { margin: 0; color: var(--ink-2); }

/* Catalog */

.toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.25rem;
  margin-bottom: 2rem;
}

.search { flex: 0 1 22rem; }
.search input {
  width: 100%;
  padding: 0.6rem 0.85rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--paper);
  color: var(--ink);
  font: inherit;
}
.search input::placeholder { color: var(--ink-2); }

.chips { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.chip {
  padding: 0.35rem 0.75rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: transparent;
  color: var(--ink);
  font: 0.9rem/1.4 var(--font-body);
  cursor: pointer;
}
.chip:hover { border-color: var(--ink); }
.chip[aria-pressed="true"] { background: var(--ink); border-color: var(--ink); color: var(--paper); }
.chip-count { margin-left: 0.35rem; opacity: 0.65; }

.tool-group + .tool-group { margin-top: 2.5rem; }
.tool-group h3 {
  margin: 0 0 0.5rem;
  font: 600 var(--step--1)/1.4 var(--font-body);
  color: var(--ink-2);
}

.tool-list { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.tool { border-bottom: 1px solid var(--line); }
.tool h4 { margin: 0; font: inherit; }

.tool-toggle {
  display: grid;
  grid-template-columns: var(--icon) minmax(0, 1fr) auto 1.25rem;
  align-items: center;
  gap: 1rem;
  width: 100%;
  padding: 0.9rem 0.5rem;
  border: 0;
  background: none;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}
.tool-toggle:hover { background: var(--paper-2); }

.tool-icon {
  display: grid;
  place-items: center;
  width: var(--icon);
  height: var(--icon);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--tile);
}
.tool-icon img { width: 32px; height: 32px; }
.tool-icon-text { color: var(--tile-ink); font: 600 0.72rem/1 var(--font-cmd); }

.tool-name { display: block; font-weight: 600; }
.tool-summary { display: block; margin-top: 0.1rem; color: var(--ink-2); font-size: 0.95rem; max-width: 64ch; }

.tool-cmds { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 0.35rem; }

.cmd {
  padding: 0.15rem 0.5rem;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: var(--paper-2);
  color: var(--ink);
  font: 0.85rem/1.4 var(--font-cmd);
  white-space: nowrap;
}

.tool-sign { position: relative; width: 14px; height: 14px; justify-self: center; }
.tool-sign::before,
.tool-sign::after {
  content: "";
  position: absolute;
  left: 0; top: 50%;
  width: 14px; height: 1.5px;
  margin-top: -0.75px;
  background: currentColor;
}
.tool-sign::after { transform: rotate(90deg); transition: transform 0.2s ease; }
.tool.open .tool-sign::after { transform: rotate(0deg); }

.tool-panel {
  display: grid;
  grid-template-rows: 0fr;
  visibility: hidden;
  transition: grid-template-rows 0.25s ease, visibility 0s linear 0.25s;
}
.tool.open .tool-panel {
  grid-template-rows: 1fr;
  visibility: visible;
  transition: grid-template-rows 0.25s ease, visibility 0s;
}
.tool-panel-inner { min-height: 0; overflow: hidden; }

.tool-body { padding: 0.25rem 0.5rem 1.75rem calc(var(--icon) + 1.5rem); }

.tool-image {
  display: block;
  height: auto;
  margin: 0 0 1.25rem;
  border: 1px solid var(--line);
}

.tool-cols { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: 1.5rem 2.5rem; }

.tool-body h5 { margin: 0 0 0.5rem; font-size: var(--step--1); font-weight: 600; color: var(--ink-2); }

.tool-steps { margin: 0; padding-left: 1.4rem; }
.tool-steps li + li { margin-top: 0.4rem; }
.tool-steps li::marker { font-family: var(--font-draw); color: var(--ink-2); }

.tool-notes { list-style: none; margin: 0; padding: 0; color: var(--ink-2); font-size: 0.95rem; }
.tool-notes li { position: relative; padding-left: 1rem; }
.tool-notes li + li { margin-top: 0.4rem; }
.tool-notes li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.8em;
  width: 0.45rem; height: 1px;
  background: var(--ink-2);
}

.tool-meta { margin: 1.25rem 0 0; color: var(--ink-2); font-size: var(--step--1); }

.tool-actions { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 0.9rem; }

.empty { padding: 1.5rem 0; border-top: 1px solid var(--line); }
.empty p { margin: 0 0 1rem; }

/* Footer title block */

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-end;
  gap: 1rem 2rem;
  padding-block: 1rem 3rem;
}
.footer-note { margin: 0; color: var(--ink-2); font-size: var(--step--1); }

.title-block {
  border-collapse: collapse;
  border: 1.5px solid var(--ink);
  min-width: min(100%, 30rem);
}
.title-block th,
.title-block td { border: 1px solid var(--ink); padding: 0.35rem 0.6rem; text-align: left; vertical-align: baseline; }
.title-block th { width: 1%; white-space: nowrap; color: var(--ink-2); font-size: 0.72rem; font-weight: 400; }
.title-block td { font: 1rem/1.3 var(--font-draw); }

/* Donation window */

.donate {
  width: min(24rem, calc(100% - 32px));
  max-height: calc(100% - 32px);
  padding: 0;
  border: 1.5px solid var(--ink);
  border-radius: var(--radius);
  background: var(--paper);
  color: var(--ink);
}
.donate::backdrop { background: rgb(15 18 22 / 0.55); }
.donate-inner { padding: 1.5rem; }
.donate h2 { font-size: var(--step-1); line-height: 1.3; margin: 0 0 0.5rem; }
.donate-text { margin: 0 0 1.25rem; }
/* Banking apps want dark modules on white, in dark mode too */
.donate-qr { max-width: 16rem; margin: 0 auto; padding: 0.75rem; border-radius: var(--radius); background: #fff; }
.donate-qr img { display: block; width: 100%; height: auto; }
.donate-hint { margin: 0.75rem 0 1.25rem; color: var(--ink-2); font-size: var(--step--1); text-align: center; }
.donate-actions { display: flex; justify-content: flex-end; margin: 0; }

/* Install guide */

.doc { display: grid; grid-template-columns: 13rem minmax(0, 1fr); gap: 3rem; padding-block: clamp(2.5rem, 6vw, 4rem); }

.toc { position: sticky; top: 1.5rem; align-self: start; font-size: 0.92rem; }
.toc h2 { font: 600 var(--step--1)/1.4 var(--font-body); color: var(--ink-2); margin: 0 0 0.6rem; }
.toc ol { list-style: none; margin: 0; padding: 0; border-left: 1px solid var(--line); }
.toc a { display: block; padding: 0.25rem 0 0.25rem 0.9rem; text-decoration: none; color: var(--ink-2); }
.toc a:hover { color: var(--accent); }

.doc-body { max-width: 44rem; }
.doc-body > h1 { margin-bottom: 1rem; }
.doc-body h2 { font-size: var(--step-2); margin: 3rem 0 0.9rem; padding-top: 1.25rem; border-top: 1px solid var(--line); }
.doc-body h3 { font-size: var(--step-0); margin: 1.75rem 0 0.5rem; }
.doc-body p, .doc-body li { max-width: 68ch; }
.doc-body ol, .doc-body ul { padding-left: 1.4rem; }
.doc-body li + li { margin-top: 0.45rem; }
.doc-body ol > li::marker { font-family: var(--font-draw); color: var(--ink-2); }

.path {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin: 0.6rem 0;
}
.path code { font-size: 0.88rem; padding: 0.35rem 0.6rem; }

.note-box {
  margin: 1.25rem 0;
  padding: 1rem 1.15rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-2);
}
.note-box p { margin: 0; }
.note-box p + p { margin-top: 0.5rem; }

.problems dt { font-weight: 600; margin-top: 1.5rem; }
.problems dd { margin: 0.35rem 0 0; color: var(--ink-2); }
.problems dd p { margin: 0.35rem 0 0; }

/* Custom bundle page (sestava.html) */

.builder-intro { padding-block: clamp(2rem, 5vw, 3.25rem) 0.5rem; max-width: 62rem; }
.builder-intro .hero-note { margin-top: 1rem; }

.builder-step { padding-top: clamp(2.5rem, 6vw, 3.5rem); }
.builder-step:last-of-type { padding-bottom: clamp(2rem, 5vw, 3rem); }
.builder-step::before {
  content: "";
  display: block;
  margin-bottom: clamp(2rem, 5vw, 3rem);
  border-top: 1px solid var(--line);
}

.step-no {
  display: inline-grid;
  place-items: center;
  width: 2.4rem; height: 2.4rem;
  margin-right: 0.5rem;
  padding-top: 0.15rem;
  border: 1.5px solid var(--ink);
  border-radius: 50%;
  font-size: 1.3rem;
  vertical-align: 0.2em;
}

.pick-group + .pick-group { margin-top: 2rem; }
.pick-group h3 { margin: 0 0 0.5rem; font: 600 var(--step--1)/1.4 var(--font-body); color: var(--ink-2); }

.pick-list, .slots { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }

.pick {
  display: grid;
  grid-template-columns: var(--icon) minmax(0, 1fr) auto 11rem;
  align-items: center;
  gap: 0.5rem 1rem;
  padding: 0.75rem 0.5rem;
  border-bottom: 1px solid var(--line);
}
.pick.is-off .tool-icon, .pick.is-off .pick-main { opacity: 0.45; }

.pick-name { display: block; font-weight: 600; }
.pick-cmds { display: flex; flex-wrap: wrap; gap: 0.35rem; margin-top: 0.25rem; }

.badge {
  display: inline-block;
  margin-left: 0.35rem;
  padding: 0.05rem 0.4rem;
  border: 1px solid var(--accent);
  border-radius: 3px;
  color: var(--accent);
  font: 600 0.72rem/1.4 var(--font-body);
  vertical-align: 0.15em;
}

/* Three modes as one segmented control; real radios underneath */
.seg { display: inline-flex; margin: 0; padding: 0; border: 0; min-width: 0; }
.seg-option { position: relative; }
.seg-option input { position: absolute; inset: 0; margin: 0; opacity: 0; cursor: pointer; }
.seg-option span {
  display: block;
  padding: 0.4rem 0.75rem;
  border: 1px solid var(--line-strong);
  background: var(--paper);
  color: var(--ink);
  font-size: 0.9rem;
  line-height: 1.3;
  white-space: nowrap;
}
.seg-option + .seg-option span { border-left: 0; }
.seg-option:first-of-type span { border-radius: var(--radius) 0 0 var(--radius); }
.seg-option:last-of-type span { border-radius: 0 var(--radius) var(--radius) 0; }
.seg-option input:hover + span { background: var(--paper-2); }
.seg-option input:checked + span { background: var(--ink); border-color: var(--ink); color: var(--paper); }
.seg-option input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: 2px; position: relative; }

.alias, .title-input {
  width: 100%;
  padding: 0.45rem 0.65rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--paper);
  color: var(--ink);
  font: 0.95rem/1.3 var(--font-cmd);
}
.alias { text-transform: uppercase; }
.alias::placeholder { text-transform: none; font-family: var(--font-body); }
.alias::placeholder, .title-input::placeholder { color: var(--ink-2); }
.alias:disabled { opacity: 0.45; }
.alias[aria-invalid="true"] { border-color: var(--accent); }
.title-input { font-family: var(--font-body); }

.pick-alias { display: block; }
.field-msg { display: block; margin-top: 0.25rem; color: var(--ink-2); font-size: 0.8rem; line-height: 1.35; }
.field-msg:empty { display: none; }
.field-msg[data-level="error"], .field-msg[data-level="warn"] { color: var(--accent); }
.field-msg[data-level="error"]::before { content: "Chyba: "; font-weight: 600; }

.hint-box { margin: 1.25rem 0 0; color: var(--ink-2); font-size: 0.95rem; max-width: 68ch; }

/* Look of the buttons */

.styles { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0.75rem; margin: 0 0 1.5rem; padding: 0; border: 0; min-width: 0; }
.styles legend { margin-bottom: 0.6rem; padding: 0; font-weight: 600; }
.style-option { position: relative; display: flex; }
.style-option input { position: absolute; top: 1rem; left: 0.9rem; margin: 0; accent-color: var(--ink); }
.style-card {
  display: block;
  width: 100%;
  padding: 0.8rem 0.9rem 0.85rem 2.4rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  cursor: pointer;
}
.style-option:hover .style-card { border-color: var(--line-strong); }
.style-option input:checked + .style-card { border-color: var(--ink); box-shadow: inset 0 0 0 1px var(--ink); }
.style-option input:focus-visible + .style-card { outline: 2px solid var(--accent); outline-offset: 2px; }
.style-name { display: block; font-weight: 600; }
.style-desc { display: block; margin-top: 0.2rem; color: var(--ink-2); font-size: 0.88rem; line-height: 1.4; }

/* Preview of the HOPS tab, in AutoCAD's own light or dark ribbon colours */

.ribbon-preview { margin: 0 0 1.75rem; }
.ribbon-preview figcaption { margin-top: 0.6rem; color: var(--ink-2); font-size: var(--step--1); }

.ribbon {
  --rb-bg: #e9ebee;
  --rb-panel: #f5f6f7;
  --rb-edge: #c3c8ce;
  --rb-ink: #20242a;
  --rb-name: #dde0e4;
  --rb-tab-on: #f5f6f7;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--rb-bg);
  color: var(--rb-ink);
  font: 0.75rem/1.25 "Segoe UI", system-ui, sans-serif;
}
@media (prefers-color-scheme: dark) {
  .ribbon {
    --rb-bg: #2b313a;
    --rb-panel: #3b4453;
    --rb-edge: #4f5a6a;
    --rb-ink: #eef1f4;
    --rb-name: #333b47;
    --rb-tab-on: #3b4453;
  }
}

.rb-tabs { display: flex; gap: 0.1rem; padding: 0.35rem 0.5rem 0; }
.rb-tab { padding: 0.25rem 0.75rem; border-radius: 3px 3px 0 0; opacity: 0.75; white-space: nowrap; }
.rb-tab-on { background: var(--rb-tab-on); opacity: 1; font-weight: 600; }

.rb-strip { display: flex; min-height: 6.6rem; padding: 0.4rem 0.5rem 0.5rem; background: var(--rb-panel); }

.rb-panel { display: flex; flex-direction: column; border: 1px solid var(--rb-edge); border-radius: 2px; }
.rb-body { display: flex; flex-direction: column; justify-content: center; gap: 0.15rem; flex: 1; padding: 0.35rem 0.4rem; }
.rb-row { display: flex; align-items: flex-start; gap: 0.15rem; }
.rb-name { padding: 0.1rem 0.5rem; border-top: 1px solid var(--rb-edge); background: var(--rb-name); text-align: center; }

.rb-btn { display: inline-flex; align-items: center; gap: 0.3rem; border-radius: 2px; white-space: nowrap; }
.rb-btn img { display: block; flex: none; }
.rb-small { min-height: 1.5rem; padding: 0.15rem 0.25rem; }
.ribbon[data-style="small"] .rb-small { min-width: 7rem; }
.rb-large { flex-direction: column; justify-content: flex-start; gap: 0.25rem; width: 4.6rem; padding: 0.2rem 0.15rem; text-align: center; white-space: normal; }
.rb-large .rb-text { overflow-wrap: anywhere; }
.rb-blank { width: 32px; height: 32px; border: 1px dashed var(--rb-edge); border-radius: 2px; }
.rb-btn:hover { background: rgba(127, 140, 155, 0.22); }
.rb-none { align-self: center; padding: 0 0.5rem; opacity: 0.75; }

/* Order of the buttons */

.slot {
  display: grid;
  grid-template-columns: auto 1.5rem var(--icon) minmax(0, 1fr);
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 0.5rem;
  border-bottom: 1px solid var(--line);
}
.slot-move { display: flex; gap: 0.25rem; }
.slot-btn {
  display: grid;
  place-items: center;
  width: 2.25rem; height: 2.25rem;
  padding: 0;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
}
.slot-btn:hover:not(:disabled) { border-color: var(--ink); }
.slot-btn:disabled { opacity: 0.3; cursor: default; }
.slot-btn svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.slot-no { color: var(--ink-2); font: 1.15rem/1 var(--font-draw); text-align: center; }
.slot-field { display: grid; grid-template-columns: minmax(0, 14rem) minmax(0, 20rem); align-items: center; gap: 0.25rem 1rem; }
.slot-label { color: var(--ink-2); font-size: 0.92rem; }
.slots-empty { margin: 0; padding: 1rem 0; border-top: 1px solid var(--line); color: var(--ink-2); }

/* Download */

.builder-summary { margin: 0; font-size: var(--step-1); line-height: 1.45; max-width: 40em; }
.btn:disabled { opacity: 0.6; cursor: progress; }
.builder-message {
  margin: 0 0 1rem;
  padding: 0.85rem 1.1rem;
  border: 1px solid var(--accent);
  border-left-width: 4px;
  border-radius: var(--radius);
}
.builder-message ul { margin: 0; padding-left: 1.1rem; }
.builder-message p { margin: 0.5rem 0 0; }

/* Small screens */

@media (max-width: 52rem) {
  .doc { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .toc { position: static; margin-bottom: 1rem; }
  .toc ol { display: flex; flex-wrap: wrap; gap: 0.25rem 1rem; border-left: 0; }
  .toc a { padding: 0.15rem 0; }
}

@media (max-width: 44rem) {
  .steps { grid-template-columns: minmax(0, 1fr); gap: 1.5rem; }
  .steps li { padding: 0 0 0 3.5rem; min-height: 2.6rem; }

  .tool-toggle { grid-template-columns: var(--icon) minmax(0, 1fr) 1.25rem; gap: 0.25rem 0.85rem; padding-inline: 0.25rem; }
  .tool-cmds { grid-column: 2; grid-row: 2; justify-content: flex-start; }
  .tool-sign { grid-column: 3; grid-row: 1; }
  .tool-body { padding: 0.25rem 0.25rem 1.5rem; }
  .tool-cols { grid-template-columns: minmax(0, 1fr); }

  .search { flex-basis: 100%; }

  .pick { grid-template-columns: var(--icon) minmax(0, 1fr); padding-inline: 0.25rem; }
  .seg, .pick-alias { grid-column: 1 / -1; }
  .seg-option { flex: 1; }
  .seg-option span { text-align: center; padding-inline: 0.4rem; }
  .styles { grid-template-columns: minmax(0, 1fr); }
  .slot { grid-template-columns: auto var(--icon) minmax(0, 1fr); gap: 0.6rem; padding-inline: 0.25rem; }
  .slot-no { display: none; }
  .slot-field { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 40rem) {
  /* Four nav items do not fit beside the brand on a phone; the nav drops under it */
  .header-inner { flex-wrap: wrap; gap: 0.35rem 1rem; padding-block: 0.7rem; }
  .brand-sub { display: none; }
  .lead { font-size: 1.125rem; }
  .site-nav { gap: 0.9rem; }
  .drawing-frame { overflow: hidden; }
  .drawing { width: 190%; max-width: none; }
  .title-block { width: 100%; min-width: 0; }
  .title-block th, .title-block td { padding: 0.3rem 0.4rem; }
}

@media (prefers-reduced-motion: reduce) {
  .tool-panel, .tool.open .tool-panel, .tool-sign::after { transition: none; }
}