@charset "UTF-8";

.usage-dialog {
  --usage-ink: var(--ws-ink, var(--ink));
  --usage-muted: var(--ws-muted, var(--muted));
  --usage-panel: var(--ws-panel, var(--surface));
  --usage-soft: var(--ws-soft, var(--surface-soft));
  --usage-line: var(--ws-line, var(--line));
  --usage-accent: var(--ws-accent-text, var(--accent-dark));
  width: min(1040px, 95vw);
  max-width: 1040px;
  max-height: calc(100dvh - 40px);
  padding: 0;
  overflow: hidden;
  border: 1px solid var(--ws-grid, var(--line));
  border-radius: 0;
  background: var(--usage-panel);
  color: var(--usage-ink);
  font-size: 16px;
  line-height: 1.8;
}
.usage-dialog[open] { display: flex; flex-direction: column; }
.usage-dialog::backdrop { background: rgb(0 0 0 / 60%); }
.usage-header { display: flex; align-items: center; justify-content: space-between; flex-shrink: 0; gap: 24px; padding: 22px 30px; border-bottom: 1px solid var(--usage-line); }
.usage-kicker { margin-bottom: 5px; color: var(--usage-muted); font-size: 15px; line-height: 1.5; letter-spacing: .04em; }
.usage-header h2 { font-size: 26px; font-weight: 700; line-height: 1.4; letter-spacing: -.035em; }
.usage-close { display: grid; flex-shrink: 0; place-items: center; width: 48px; height: 48px; padding: 0; border: 1px solid var(--usage-line); background: transparent; color: var(--usage-ink); font-size: 32px; font-weight: 400; line-height: 1; }
.usage-section-tabs { display: grid; grid-template-columns: 1fr 1fr 1fr 1.6fr; flex-shrink: 0; padding: 0 30px; border-bottom: 1px solid var(--usage-line); }
.usage-section-tab { min-width: 0; min-height: 62px; padding: 12px 10px; border-bottom: 3px solid transparent; background: transparent; color: var(--usage-muted); font-size: 16px; line-height: 1.5; }
.usage-section-tab[aria-selected="true"] { border-bottom-color: var(--usage-accent); color: var(--usage-ink); font-weight: 700; }
.usage-content { flex: 1 1 auto; min-height: 0; padding: 26px 30px 30px; overflow: auto; overscroll-behavior: contain; scrollbar-gutter: stable; }
.usage-pane { min-width: 0; }
.usage-topic-tabs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 26px; }
.usage-topic-tab { min-height: 44px; padding: 8px 15px; border: 1px solid var(--usage-line); background: transparent; color: var(--usage-muted); font-size: 15px; line-height: 1.7; }
.usage-topic-tab[aria-selected="true"] { border-color: var(--usage-ink); background: var(--usage-ink); color: var(--usage-panel); }
.usage-lesson { min-width: 0; }
.usage-lesson-heading { margin-bottom: 24px; }
.usage-lesson-heading h3 { margin: 0 0 7px; color: var(--usage-ink); font-size: 24px; font-weight: 700; line-height: 1.45; letter-spacing: -.025em; }
.usage-lesson-heading p { color: var(--usage-muted); font-size: 16px; line-height: 1.8; }
.usage-lesson-grid { display: grid; grid-template-columns: minmax(0, .92fr) minmax(0, 1.15fr); align-items: start; gap: 30px; }
.usage-figure { min-width: 0; margin: 0; padding: 14px 16px 18px; border: 1px solid var(--usage-line); background: var(--usage-soft); }
.usage-diagram { display: block; width: 100%; max-width: 410px; height: auto; margin: 0 auto; overflow: visible; color: var(--usage-ink); font-family: inherit; font-size: 18px; }
.usage-diagram text:not([fill]) { fill: currentColor; }
.usage-figure figcaption { margin-top: 12px; color: var(--usage-muted); font-size: 15px; line-height: 1.8; }
.usage-svg-line { fill: none; stroke: currentColor; stroke-width: 1.6; }
.usage-svg-grid { fill: none; stroke: var(--usage-muted); stroke-width: 1; opacity: .35; }
.usage-svg-box { fill: var(--usage-panel); stroke: var(--usage-line); stroke-width: 1.5; }
.usage-svg-photo { fill: #c3c5c5; stroke: var(--usage-line); }
.usage-svg-chart { fill: none; stroke: var(--usage-accent); stroke-width: 3; stroke-linejoin: round; }
.usage-svg-ray { fill: none; stroke: currentColor; stroke-width: 1.2; stroke-dasharray: 4 4; opacity: .5; }
.usage-svg-cluster { fill: none; stroke: var(--usage-accent); stroke-width: 7; stroke-linecap: round; stroke-linejoin: round; opacity: .8; }
.usage-svg-cloud { fill: var(--usage-accent); opacity: .6; }
.usage-svg-red { color: #b3342b; }
.usage-svg-green { color: #24664b; }
.usage-svg-blue { color: #2b5d99; }
.usage-svg-cyan { color: #146f74; }
.usage-svg-magenta { color: #8f3985; }
.usage-svg-yellow { color: #745607; }
.usage-diagram circle[class^="usage-svg-"]:not(.usage-svg-grid):not(.usage-svg-cloud) { fill: currentColor; }
.usage-svg-cluster:is(.usage-svg-red, .usage-svg-green, .usage-svg-blue), .usage-svg-ray:is(.usage-svg-red, .usage-svg-green, .usage-svg-blue, .usage-svg-cyan, .usage-svg-magenta, .usage-svg-yellow) { stroke: currentColor; }
.usage-svg-outline-a, .usage-svg-outline-b { fill: none; stroke-width: 3; }
.usage-svg-outline-a { stroke: #f2d0ac; }
.usage-svg-outline-b { stroke: #a9edeb; }
.usage-svg-a { color: var(--usage-accent); font-weight: 700; }
.usage-svg-b { color: #236d6a; font-weight: 700; }
.usage-reading { display: grid; gap: 19px; margin: 0; padding: 0; list-style: none; }
.usage-reading li { display: grid; grid-template-columns: 29px minmax(0, 1fr); align-items: start; gap: 12px; }
.usage-step-number { padding-top: 1px; color: var(--usage-accent); font-size: 16px; font-weight: 700; line-height: 1.8; font-variant-numeric: tabular-nums; }
.usage-reading h4, .usage-notes h4 { margin: 0 0 5px; color: var(--usage-ink); font-size: 16px; font-weight: 700; line-height: 1.8; }
.usage-reading p, .usage-notes p { margin: 0; color: var(--usage-ink); font-size: 16px; line-height: 1.85; overflow-wrap: anywhere; }
.usage-notes { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; margin-top: 28px; padding-top: 24px; border-top: 1px solid var(--usage-line); }
.usage-example, .usage-caution { min-width: 0; padding-left: 15px; border-left: 2px solid var(--usage-line); }
.usage-example { border-left-color: var(--usage-accent); }
.usage-next { display: flex; flex-wrap: wrap; gap: 8px 22px; margin-top: 22px; }
.usage-link { display: inline-flex; align-items: center; justify-content: flex-start; gap: 7px; min-height: 44px; padding: 8px 0; background: transparent; color: var(--usage-accent); font-size: 15px; line-height: 1.7; text-align: left; text-decoration: underline; text-underline-offset: 4px; }
.usage-dialog :focus-visible { outline: 3px solid var(--usage-accent); outline-offset: 3px; }
.usage-pane:focus-visible, .usage-lesson:focus-visible { outline-offset: 5px; }
body[data-home-theme="dark"] .usage-dialog { --usage-accent: var(--ws-accent-text, #f4796b); box-shadow: 0 28px 90px rgb(0 0 0 / 55%); }
body[data-home-theme="dark"] .usage-svg-red { color: #f6988f; }
body[data-home-theme="dark"] .usage-svg-green { color: #92cbaa; }
body[data-home-theme="dark"] .usage-svg-blue { color: #94bff2; }
body[data-home-theme="dark"] .usage-svg-cyan { color: #8cdae0; }
body[data-home-theme="dark"] .usage-svg-magenta { color: #dfa3d6; }
body[data-home-theme="dark"] .usage-svg-yellow { color: #ddc57e; }
body[data-home-theme="dark"] .usage-svg-b { color: #8cdae0; }
@media (hover: hover) {
  .usage-close:hover, .usage-section-tab:hover, .usage-topic-tab:not([aria-selected="true"]):hover { background: var(--usage-soft); color: var(--usage-ink); }
  .usage-link:hover { color: var(--usage-ink); }
}
@media (max-width: 800px) {
  .usage-lesson-grid { grid-template-columns: 1fr; gap: 25px; }
  .usage-figure { padding: 16px 18px; }
  .usage-diagram { max-width: 400px; }
}
@media (max-width: 540px) {
  .usage-dialog { max-height: calc(100dvh - 24px); }
  .usage-header { gap: 12px; padding: 16px; }
  .usage-header h2 { font-size: 22px; }
  .usage-kicker { font-size: 15px; }
  .usage-close { width: 44px; height: 44px; }
  .usage-section-tabs { grid-template-columns: repeat(2, minmax(0, 1fr)); padding: 0 16px; }
  .usage-section-tab { min-height: 48px; padding: 9px 4px; font-size: 15px; }
  .usage-content { padding: 20px 16px 24px; }
  .usage-topic-tabs { gap: 7px; margin-bottom: 22px; }
  .usage-topic-tab { padding: 8px 11px; }
  .usage-lesson-heading { margin-bottom: 20px; }
  .usage-lesson-heading h3 { font-size: 22px; }
  .usage-figure { padding: 12px 5px 16px; }
  .usage-figure figcaption { padding: 0 7px; }
  .usage-reading li { grid-template-columns: 26px minmax(0, 1fr); gap: 9px; }
  .usage-notes { grid-template-columns: 1fr; gap: 20px; margin-top: 24px; padding-top: 22px; }
  .usage-next { display: grid; gap: 4px; }
}
@media (prefers-reduced-motion: reduce) {
  .usage-dialog[open] { animation: none; }
}