/* shell.css of the design kit, in the layer xoong-standard (tools/kit-css.mjs) */
@layer xoong-standard {
/*
 * Page shell and demo frame (site/demo only: NOT for the framework).
 * Fluid: the page fills the window. Three columns: navigation | content | right rail ("on this page", related, ads of the future).
 * No max-width on the shell; only reading text keeps a comfortable measure, so wide demos use the room.
 */
:root { --gutter: clamp(1rem, 2.4vw, 2.5rem); --nav-w: 16rem; --rail-w: 15rem; --header-h: 4rem; --measure: 74ch; }
body.shell-page header.top .wrap { max-width: none; padding-inline: var(--gutter); }
body.shell-page footer.foot .wrap { max-width: none; padding-inline: var(--gutter); }

.shell { display: grid; grid-template-columns: var(--nav-w) minmax(0, 1fr) var(--rail-w); min-height: calc(100vh - var(--header-h)); }
.shell > nav.side, .shell > aside.rail { position: sticky; top: var(--header-h); align-self: start; max-height: calc(100vh - var(--header-h)); overflow-y: auto; padding: 1.5rem 1rem 2rem var(--gutter); }
.shell > aside.rail { padding: 1.5rem var(--gutter) 2rem 1rem; }
.shell nav.side h2, .rail h2 { margin: 1.3rem 0 .35rem; font: 700 .72rem/1 var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--muted); border: 0; padding: 0; }
.shell nav.side h2:first-child, .rail h2:first-child { margin-top: 0; }
.shell nav.side a { display: flex; align-items: center; gap: .55rem; min-height: 2.1rem; padding: 0 .7rem; border-radius: 8px; color: var(--text); text-decoration: none; font-size: .95rem; }
.shell nav.side a:hover { background: var(--broth); }
.shell nav.side a[aria-current="page"] { background: var(--ember-soft); color: var(--ember-deep); font-weight: 700; }
.shell nav.side .icon { color: var(--muted); --xo-icon: 1.1rem; }
.rail ol { margin: 0; padding: 0; list-style: none; border-left: 1px solid var(--line); }
.rail ol a { display: block; padding: .3rem .8rem; margin-left: -1px; border-left: 2px solid transparent; color: var(--muted); text-decoration: none; font-size: .9rem; }
.rail ol a:hover { color: var(--text); }
.rail ol a[aria-current="true"] { color: var(--ember-deep); border-left-color: var(--ember-deep); font-weight: 600; }
.rail .card-mini { margin-top: 1.5rem; padding: 1rem; border: 1px solid var(--line); border-radius: var(--xo-radius); background: var(--surface); font-size: .9rem; }
.rail .card-mini p { margin: .3rem 0 0; color: var(--muted); }

.content { min-width: 0; padding: 2rem var(--gutter) 5rem; container-type: inline-size; }
.content > h1 { font-size: clamp(2rem, 4vw, 3rem); letter-spacing: -.05em; margin: 0 0 .5rem; }
.content > .lede, .content p, .content ul:not(.chips):not(.cards-row), .content ol { max-width: var(--measure); }
.content h2 { margin: 3rem 0 .7rem; padding-top: 1rem; border-top: 1px solid var(--line); scroll-margin-top: calc(var(--header-h) + 1rem); font-size: clamp(1.5rem, 2.6vw, 2rem); }
.content h3 { margin: 1.8rem 0 .4rem; }
.crumbs { display: flex; align-items: center; gap: .35rem; margin-bottom: 1rem; color: var(--muted); font-size: .875rem; } .crumbs a { color: inherit; } .crumbs .icon { --xo-icon: .9rem; }

/* ---- demo frame: one look for every example ---- */
.example { margin: 1.2rem 0 1.8rem; border: 1px solid var(--line); border-radius: calc(var(--xo-radius) + 4px); background: var(--surface); overflow: hidden; }
.example-head { display: flex; align-items: center; gap: .5rem; padding-right: .6rem; background: var(--broth); border-bottom: 1px solid var(--line); }
.example-head [role="tablist"] { flex: 1; border: 0; padding-left: .5rem; }
.example-head [role="tab"] { margin: 0; min-height: 2.9rem; }
.example-head .actions-end { display: flex; gap: .25rem; }
.preview { padding: clamp(1rem, 2.5vw, 2rem); background: radial-gradient(circle at 1px 1px, var(--dots) 1.1px, transparent 1.3px) 0 0 / 20px 20px, var(--bg); }
.preview > :first-child { margin-top: 0; } .preview > :last-child { margin-bottom: 0; }
.preview .panel { padding: 1.25rem; background: var(--surface); border: 1px solid var(--line); border-radius: calc(var(--xo-radius) + 2px); }
.preview .split { display: grid; grid-template-columns: minmax(0, 1fr); gap: 1.5rem; align-items: start; }
@container (min-width: 56rem) { .preview .split { grid-template-columns: minmax(0, 3fr) minmax(0, 2fr); } .preview .split.even { grid-template-columns: 1fr 1fr; } }
.example pre { margin: 0; border-radius: 0; border: 0; padding: 1.1rem 1.3rem; background: var(--surface); color: var(--text); font-size: .9rem; line-height: 1.65; overflow-x: auto; }
.preview-note { margin-top: .8rem; color: var(--muted); font-size: .85rem; }
.example .t-tag { color: var(--ember-deep); } .example .t-attr { color: light-dark(#7a5a12, #f5c04a); } .example .t-str { color: light-dark(#2f6f48, #8fe0a8); } .example .t-mute { color: var(--muted); }

.cards-row { display: grid; grid-template-columns: repeat(auto-fill, minmax(15rem, 1fr)); gap: 1rem; padding: 0; margin: 1rem 0; list-style: none; }
.person { display: flex; gap: .8rem; align-items: center; padding: .8rem 1rem; background: var(--surface); border: 1px solid var(--line); border-radius: var(--xo-radius); }
.avatar { display: grid; place-items: center; width: 2.5rem; height: 2.5rem; border-radius: 50%; background: var(--ember-soft); color: var(--ember-deep); font-weight: 800; flex: none; }
.person b { display: block; line-height: 1.2; } .person small { color: var(--muted); }

@media (max-width: 80rem) { .shell { grid-template-columns: var(--nav-w) minmax(0, 1fr); } .shell > aside.rail { display: none; } }
@media (max-width: 52rem) { .shell { grid-template-columns: minmax(0, 1fr); } .shell > nav.side { display: none; } .docs-menu { display: block; } .content { padding-top: 1.2rem; } }
@media (min-width: 120rem) { :root { --nav-w: 18rem; --rail-w: 18rem; } }

/* ---- components / icons pages ---- */
.std-row { display: grid; grid-template-columns: 9rem minmax(0, 1fr); gap: 1rem; align-items: center; padding: .65rem 0; border-bottom: 1px dashed var(--line); }
.std-row:last-child { border-bottom: 0; }
.std-label { font: 600 .75rem/1.3 var(--mono); color: var(--muted); }
.std-cells { display: flex; flex-wrap: wrap; gap: .6rem; align-items: center; }
.std-cells input, .std-cells select { width: 11rem; }
@media (max-width: 40rem) { .std-row { grid-template-columns: 1fr; gap: .3rem; } }
.icon-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(7.5rem, 1fr)); gap: .75rem; margin: 1rem 0; }
.icon-cell { display: grid; justify-items: center; gap: .6rem; padding: 1.1rem .5rem .9rem; background: var(--surface); border: 1px solid var(--line); border-radius: var(--xo-radius); transition: border-color .15s ease, transform .15s ease; }
.icon-cell:hover { border-color: var(--ember-deep); transform: translateY(-2px); }
.icon-cell .icon { --xo-icon: 1.75rem; color: var(--text); }
.icon-cell code { padding: 0; background: none; font-size: .72rem; color: var(--muted); }
.sprite { position: absolute; width: 0; height: 0; overflow: hidden; }

/* ---- controls-demo ---- */
.cards-3 { --xo-carousel-items: 1; }
@container (min-width: 36rem) { .cards-3 { --xo-carousel-items: 2; } }
@container (min-width: 56rem) { .cards-3 { --xo-carousel-items: 3; --xo-carousel-gap: 1.25rem; } }
.stage-gap { margin-top: 1rem; max-width: 16rem; }
.dialog-stage { position: relative; display: grid; place-items: start center; padding: 1rem; background: color-mix(in srgb, var(--soot) 8%, transparent); border-radius: var(--xo-radius); }
.dialog-stage dialog { position: static; margin: 0; display: block; }
.preview .field .opt { display: flex; align-items: center; min-height: 2.25rem; padding: 0 .65rem; border-radius: 8px; font-size: .95rem; }
.preview .field .opt.xo-active { background: var(--ember-soft); }
.preview .field .opt[aria-selected="true"] { font-weight: 700; }
.toast-error { border-left: 4px solid var(--danger); }
.example xo-carousel .card { display: block; padding: 1.1rem 1.2rem; background: var(--surface); border: 1px solid var(--line); border-radius: var(--xo-radius); }
.example xo-carousel .card h3 { margin: 0 0 .3rem; font-size: 1.1rem; } .example xo-carousel .card p { margin: 0 0 .5rem; color: var(--muted); }

/* ---- brand flourishes: none left in Mist (the offset shadows were the old Calm look) ---- */

/* a code frame with a single tab: the tab reads as a label (a file name), not as something to click */
[role="tablist"]:has(> [role="tab"]:only-child) [role="tab"] { cursor: default; border-bottom-color: transparent; color: var(--text); }
[role="tablist"]:has(> [role="tab"]:only-child) [role="tab"]:hover { background: none; }
[role="tablist"]:has(> [role="tab"]:only-child) [role="tab"]::before { content: ""; width: 1rem; height: 1rem; background: var(--muted); -webkit-mask: var(--ic-code) center / contain no-repeat; mask: var(--ic-code) center / contain no-repeat; }

/* ---- controls overview: one card per control ---- */
.control-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 17rem), 1fr)); gap: 1rem; padding: 0; margin: 1.5rem 0; list-style: none; max-width: none !important; }
.control-cards .card { display: grid; align-content: start; gap: .35rem; height: 100%; padding: 1.25rem; }
.control-cards .card h3 { margin: .5rem 0 0; font-size: 1.1rem; } .control-cards .card p { margin: 0; color: var(--muted); font-size: .95rem; }
.control-cards .card code { margin-top: .6rem; justify-self: start; font-size: .78rem; color: var(--muted); }
.ctl-icon { display: grid; place-items: center; width: 2.75rem; height: 2.75rem; border-radius: 12px; background: var(--ember-soft); color: var(--ember-deep); }
.shell.no-rail { grid-template-columns: var(--nav-w) minmax(0, 1fr); }

/* ---- overlays sheet: open overlays side by side ---- */
.overlay-set { display: grid; grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr)); gap: 1.25rem; padding: 1.25rem; border: 1px solid var(--line); border-radius: var(--radius); align-items: start; }
.overlay-cell { display: grid; gap: .75rem; align-content: start; min-width: 0; }
.overlay-cell dialog { position: static; margin: 0; display: block; max-width: 100%; }
.overlay-cell .menu-panel .opt { display: flex; align-items: center; min-height: 2.25rem; padding: 0 .65rem; border-radius: 8px; font-size: .95rem; }
.overlay-cell .menu-panel .opt.xo-active { background: var(--xo-color-accent-soft); } .overlay-cell .menu-panel .opt[aria-selected="true"] { font-weight: 700; }

/* headings inside dialogs are not page sections: undo the .content h2 section styling */
.content dialog h2, .content .xo-confirm h2 { margin: 0 0 .5rem; padding: 0; border: 0; font-size: 1.3rem; }
.example > pre { border-top: 0; }

/* ---- focus audit ---- */
.focus-bg { display: flex; flex-wrap: wrap; align-items: center; gap: .9rem; padding: 1rem 1.2rem; border-radius: var(--xo-radius); }
.bg-page { background: var(--xo-color-bg); } .bg-surface { background: var(--xo-color-surface); } .bg-subtle { background: var(--xo-color-subtle); }
.bg-accent-soft { background: var(--xo-color-accent-soft); } .bg-inverse { background: var(--xo-color-inverse); color: var(--xo-color-inverse-text); }
.bg-inverse :is(button, input) { outline-color: var(--xo-color-inverse-text); }
.ring-table td b { font-variant-numeric: tabular-nums; margin-right: .35rem; } .ring-table td.bad b { color: var(--xo-color-danger); }
.ring-table .sw { display: inline-block; width: .9rem; height: .9rem; margin-right: .5rem; vertical-align: -.1em; border: 1px solid var(--xo-color-control-border); border-radius: 4px; background: var(--xo-color-bg); }
.ring-table .sw[data-bg="surface"] { background: var(--xo-color-surface); } .ring-table .sw[data-bg="subtle"] { background: var(--xo-color-subtle); }
.ring-table .sw[data-bg="accent-soft"] { background: var(--xo-color-accent-soft); } .ring-table .sw[data-bg="inverse"] { background: var(--xo-color-inverse); }
.bg-inverse :is(button:not(.primary), [role="tab"]) { color: var(--xo-color-inverse-text); background: transparent; border-color: color-mix(in srgb, var(--xo-color-inverse-text) 45%, transparent); }

/* ---- theme builder ---- */
.presets { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 14rem), 1fr)); gap: .9rem; margin: 1rem 0 1.5rem; max-width: none; }
.preset { position: relative; display: grid; gap: .4rem; align-content: start; padding: 1rem; cursor: pointer; background: var(--surface); border: var(--xo-border-width, 1px) solid var(--line); border-radius: var(--radius); transition: border-color .15s ease, transform .15s ease; }
.preset:hover { border-color: var(--ember-deep); transform: translateY(-2px); }
.preset input { position: absolute; inset: 0; opacity: 0; cursor: pointer; margin: 0; width: 100%; height: 100%; }
.preset:has(input:checked) { border-color: var(--ember-deep); box-shadow: 0 0 0 2px var(--ember-deep); }
.preset:has(input:focus-visible) { outline: 3px solid var(--ember-deep); outline-offset: 3px; }
.preset small { color: var(--muted); line-height: 1.35; }
.preset-dots { display: flex; margin-bottom: .2rem; } .preset-dots i { width: 1.6rem; height: 1.6rem; border-radius: 50%; border: 2px solid var(--surface); margin-right: -.45rem; box-shadow: 0 0 0 1px var(--line); }
.builder { display: grid; grid-template-columns: minmax(0, 1fr); gap: 1.5rem; margin-top: 1rem; align-items: start; container-type: normal; }
@media (min-width: 72rem) { .builder { grid-template-columns: 22rem minmax(0, 1fr); } .builder-preview { position: sticky; top: calc(var(--header-h) + 1rem); } }
.builder-controls fieldset { margin: 0 0 1rem; } .builder-controls .field { margin-bottom: .8rem; }
.colors { display: grid; gap: .55rem; margin: .8rem 0; }
.color-row { display: grid; grid-template-columns: 6.5rem 3.25rem minmax(0, 1fr); gap: .6rem; align-items: center; } .color-row label { font-size: .9rem; font-weight: 600; }
.color-row .hex { font-family: var(--mono); font-size: .9rem; text-transform: lowercase; }
.preview-bar { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-bottom: .6rem; flex-wrap: wrap; }
.theme-preview { display: grid; gap: 1.2rem; padding: clamp(1rem, 2vw, 1.6rem); border: 1px solid var(--line); border-radius: var(--radius); max-width: none; }
.theme-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr)); gap: 1.2rem; align-items: start; }
.theme-preview .panel { padding: 1.1rem; background: var(--xo-color-surface); border: var(--xo-border-width, 1px) solid var(--xo-color-border); border-radius: calc(var(--xo-radius) + 2px); }
.theme-preview p { margin: 0 0 .6rem; max-width: none; } .theme-preview .chips { margin: .8rem 0; }
.theme-preview .menu-panel { max-width: 15rem; }
@media (min-width: 72rem) { .shell.no-rail { grid-template-columns: var(--nav-w) minmax(0, 1fr); } }

}