:root {
  --capsai-column-gap: clamp(1rem, 2vw, 1.75rem);
  --capsai-card-radius: var(--surface-radius);
  --capsai-card-inset: clamp(1rem, 1.6vw, 1.5rem);
  --capsai-viewer-size: clamp(34rem, 70svh, 52rem);
}

main { width: min(1600px, 100%); margin: 0 auto; padding: 0 clamp(1rem, 3.5vw, 3.25rem) 4rem; }
.intro { max-width: 70rem; padding: clamp(2.5rem, 6vw, 5rem) 0 clamp(2rem, 4vw, 3rem); }
.eyebrow { margin: 0 0 .5rem; color: var(--accent); font-size: .76rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }
.intro h1 { max-width: 18ch; margin: 0; font-size: clamp(2.5rem, 6vw, 4.75rem); line-height: 1; }
.intro .lede { max-width: 72ch; margin-top: 1rem; }
.concept-note { margin: 1.25rem 0 0; color: var(--muted); font-size: .9rem; }
.comparison { margin-top: .5rem; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 1.5rem; margin-bottom: 1rem; }
.section-heading h2 { margin: 0; font-size: clamp(1.65rem, 3vw, 2.25rem); letter-spacing: -.025em; }
.viewer-hint { max-width: 42ch; margin: 0; color: var(--muted); font-size: .92rem; }
.comparison-key { display: flex; flex-wrap: wrap; gap: .5rem 1.5rem; margin: 0 0 1rem; color: var(--muted); font-size: .85rem; }
.comparison-key strong { color: var(--text); }
.design-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--capsai-column-gap); align-items: stretch; }
.model-card { display: grid; grid-template-rows: subgrid; grid-row: span 4; row-gap: 0; min-width: 0; overflow: hidden; border: 1px solid var(--line); border-radius: var(--capsai-card-radius); background: var(--paper-surface); background-size: var(--paper-texture-size); box-shadow: var(--shadow-raised); }
.card-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 1rem; padding: var(--capsai-card-inset) var(--capsai-card-inset) .85rem; }
.card-head > div { min-inline-size: 0; }
.card-head h3 { max-width: 24ch; margin: 0; font-size: clamp(1.2rem, 1.7vw, 1.55rem); line-height: 1.15; letter-spacing: -.02em; }
.card-description { max-width: 54ch; margin: .55rem 0 0; color: var(--muted); font-size: .9rem; line-height: 1.5; }
.design-tag { flex: 0 0 auto; padding: .3rem .6rem; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); font-size: .72rem; font-weight: 650; letter-spacing: .06em; text-transform: uppercase; }
.viewer-status { min-height: 1.25rem; margin: 0; padding: 0 var(--capsai-card-inset) .55rem; color: var(--muted); font-size: .8rem; }
.viewer-status[data-state="error"] { color: var(--status-error); }
.viewer-frame { position: relative; overflow: hidden; min-inline-size: 0; block-size: var(--capsai-viewer-size); background: var(--bg); border-block: 1px solid var(--line); }
.model-frame { display: block; inline-size: 100%; block-size: 100%; border: 0; background: var(--bg); }
.model-card[data-state="error"] .viewer-frame { outline: 1px solid var(--status-error); outline-offset: -1px; }
.card-actions { display: flex; flex-wrap: wrap; align-items: center; gap: .75rem 1rem; min-height: 3.5rem; padding: .7rem var(--capsai-card-inset); font-size: .86rem; }
.card-actions a { text-underline-offset: .18em; }
.card-actions button { min-height: var(--control-size); padding: .45rem .8rem; border: 1px solid var(--control-edge); border-radius: var(--control-radius); color: var(--text); background: var(--surface-raised); font: inherit; cursor: pointer; }
.card-actions button:hover { border-color: var(--accent); }
.card-actions button:focus-visible, .card-actions a:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }
.card-actions [hidden] { display: none; }
.comparison-note { margin: 1rem 0 0; color: var(--muted); font-size: .85rem; }
.noscript { width: min(100% - 2rem, 80rem); margin: 1rem auto; padding: 1rem; border: 1px solid var(--line); }
.workspace-toolbar, .workspace-views { display: flex; flex-wrap: wrap; align-items: end; gap: .75rem; }
.workspace-toolbar { justify-content: space-between; }
.workspace-toolbar label, .component-details label { display: grid; gap: .4rem; min-width: 0; }
.workspace-toolbar select, .component-details select { width: 100%; max-width: 26rem; }
.workspace-toolbar button, .workspace-toolbar select, .component-details select, #workspace-retry { min-height: var(--control-size); padding: .6rem .85rem; border: 1px solid var(--control-edge); border-radius: var(--control-radius); background: var(--surface-raised); color: var(--text); font: inherit; box-shadow: var(--shadow-control); }
.workspace-toolbar button, #workspace-retry { cursor: pointer; }
.workspace-toolbar button[aria-pressed="true"] { border-color: var(--accent); background: var(--panel-2); box-shadow: var(--shadow-inset); text-decoration: underline; text-underline-offset: .3em; }
.workspace-toolbar :focus-visible, .component-details :focus-visible, #workspace-retry:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }
.workspace-status { min-height: 1.5em; color: var(--muted); }
.workspace-status[data-state="error"] { color: var(--status-error); }
.model-card[data-selected="true"] { border-color: var(--accent); }
.diagram-panel { border: 1px solid var(--line); border-radius: var(--capsai-card-radius); background: var(--paper-surface); background-size: var(--paper-texture-size); padding: clamp(.75rem, 2vw, 1.5rem); box-shadow: var(--shadow-raised); }
.component-details { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 2fr); gap: 1.5rem; margin-top: 1.5rem; padding: 1.25rem; border: 1px solid var(--line); border-radius: var(--capsai-card-radius); background: var(--paper-surface); background-size: var(--paper-texture-size); overflow-wrap: anywhere; box-shadow: var(--shadow-inset); }
.component-details h3 { margin: 0 0 1rem; }
.component-details p { margin-top: 0; }
.component-details details { margin-top: 1rem; }
.component-details summary { cursor: pointer; padding-block: .5rem; }
[hidden] { display: none !important; }
:focus-visible { scroll-margin-block: 1rem; }

@media (max-width: 960px) {
  .design-grid { grid-template-columns: 1fr; max-width: 56rem; margin-inline: auto; }
}

@media (max-width: 600px) {
  main { padding-inline: 1rem; }
  .workspace-toolbar { align-items: stretch; }
  .workspace-toolbar > label, .workspace-views { width: 100%; }
  .workspace-views button { flex: 1; }
  .component-details { grid-template-columns: minmax(0, 1fr); }
  .section-heading { align-items: flex-start; flex-direction: column; gap: .65rem; }
  .card-head { gap: .65rem; }
}

@media (max-width: 360px) {
  main { padding-inline: .75rem; }
  .intro h1 { font-size: clamp(2rem, 11vw, 2.5rem); }
  .card-head { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}