.sources-page{max-width:700px;margin:auto;padding:28px 24px 64px;background:var(--app-paper,#f7f0df);color:var(--app-ink,#362f25);--sources-body:16px;--sources-small:13px}
.sources-header{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:48px}
.sources-home{display:flex;align-items:center;gap:10px;font:400 var(--sources-small)/1.4 "Google Sans",sans-serif;color:inherit}.sources-home .brand-mark{width:24px;height:32px}
.sources-page main{width:100%;padding:0!important;margin:0;max-width:none;text-align:start}.sources-page main[hidden]{display:none}
.sources-page h1{font:500 clamp(28px,5vw,34px)/1.1 "Google Sans",sans-serif;margin:0 0 28px;text-wrap:balance;letter-spacing:-.02em}
.sources-page h2{font:500 21px/1.2 "Google Sans",sans-serif;margin:40px 0 14px;text-wrap:balance;letter-spacing:0}
.sources-page p{font:400 var(--sources-body)/1.6 "Google Sans",sans-serif;margin:0 0 16px;max-width:68ch;overflow-wrap:break-word;text-wrap:pretty}
.sources-page main a{text-decoration:underline;text-underline-position:from-font;text-decoration-thickness:from-font;text-underline-offset:3px;text-decoration-skip-ink:auto}.source-links{display:flex;flex-wrap:wrap;gap:8px 18px}.sources-page .source-links{font-size:var(--sources-small);margin-block:20px 24px}
.sources-page table{width:100%;border-collapse:collapse;font:400 var(--sources-small)/1.5 "Google Sans",sans-serif;font-variant-numeric:tabular-nums}
.sources-page td,.sources-page th{padding:12px 6px;text-align:end;border-bottom:1px solid var(--line,#ded3bf)}.sources-page th{font-weight:500}.sources-page th:first-child{text-align:start;width:29%}.sources-page thead th{vertical-align:bottom}.sources-page tbody th{font-weight:400}
@media(max-width:480px){.sources-page{padding:20px 18px 40px;--sources-small:12px}.sources-header{gap:8px;margin-bottom:36px}.sources-page td,.sources-page th{padding:10px 4px}.site-language-picker button{min-height:40px;padding-inline:9px}}
.project-credit strong{font-weight:600}.sources-page .project-credit{max-width:52ch;margin-bottom:28px}
.about-tabs{display:flex;gap:4px;padding:4px;border-radius:6px;background:var(--soft);margin:0 0 30px;overflow-x:auto}
.about-tabs button{flex:1;min-height:42px;padding:8px 10px;font:500 13px/1.25 "Google Sans",sans-serif;color:var(--quiet);border-radius:4px;white-space:nowrap}
.about-tabs [aria-selected=true]{background:var(--paper);color:var(--ink)}.about-tabs button:focus-visible{outline:2px solid var(--vilna-accent);outline-offset:-2px}
.sources-page [role=tabpanel][hidden]{display:none}.sources-page [role=tabpanel]>h2:first-child{margin-top:0}
.release-entry{padding:22px 0;border-bottom:1px solid var(--rule)}.release-entry:first-child{padding-top:0}.release-entry small{font-size:12px;color:var(--quiet)}.sources-page h3{font:500 18px/1.35 "Google Sans",sans-serif;margin:10px 0}
.release-entry ul{padding-left:20px;margin:14px 0;font:14px/1.6 "Google Sans",sans-serif}.release-entry li{margin:8px 0}
.sources-page .history-note,.sources-page .history-metric,.sources-page .history-intro{font-size:13px;color:var(--quiet)}.history-warning{padding:14px;border-left:2px solid #994143;background:var(--soft);font-size:14px!important}
.matching-stage{border-bottom:1px solid var(--rule);padding:0 0 18px;margin-bottom:12px}.matching-stage summary{display:flex;justify-content:space-between;align-items:center;gap:14px;cursor:pointer;min-height:54px;font:500 14px/1.4 "Google Sans",sans-serif;list-style:none}.matching-stage summary::after{content:'+';font-size:20px}.matching-stage[open] summary::after{content:'−'}.matching-stage summary span{flex:1}.matching-stage summary strong{font-variant-numeric:tabular-nums}
.matching-stage>p{font-size:14px}.history-table-wrap{overflow:auto;margin:20px 0}.history-table-wrap table{min-width:440px}.history-table-wrap caption{text-align:left;font-size:12px;color:var(--quiet);margin-bottom:8px}.matching-stage>a{font-size:12px}
@media(max-width:480px){.about-tabs button{font-size:12px;padding:8px 6px}.matching-stage summary{font-size:13px}.sources-page .project-credit{font-size:15px}}
/* About uses the stable warm interface palette, independent of reader paper. */
.sources-page{--history-accent:var(--vilna-accent,#8e4147);--history-line:color-mix(in srgb,var(--app-ink,#362f25) 15%,transparent)}
.about-tabs{position:relative;isolation:isolate;background:color-mix(in srgb,var(--app-ink,#362f25) 5%,transparent);overflow:visible}
.about-tabs::before{content:'';position:absolute;z-index:-1;inset:4px auto 4px 4px;width:calc((100% - 16px)/3);background:var(--history-accent);border-radius:4px;transform:translateX(calc(var(--active-tab,0) * (100% + 4px)));transition:transform 200ms cubic-bezier(.2,.7,.2,1)}
.about-tabs button{background:transparent;color:inherit;transition:color 160ms,background 160ms}.about-tabs [aria-selected=true]{background:transparent;color:#fff}.about-tabs button:not([aria-selected=true]):hover{background:color-mix(in srgb,var(--app-ink,#362f25) 6%,transparent)}
.matching-stage{border-color:var(--history-line)}.matching-stage summary{flex-wrap:wrap;gap:6px 12px;padding-block:10px;transition:color 160ms}.matching-stage summary:hover{color:var(--history-accent)}.matching-stage summary>span{min-width:55%;flex:1}.matching-stage summary strong{font-size:16px}.matching-stage summary .coverage-change{font:500 12px/1.4 "Google Sans",sans-serif;white-space:nowrap;color:var(--history-accent)}.matching-stage summary::after{transition:transform 180ms;content:'+'}.matching-stage[open] summary::after{content:'+';transform:rotate(45deg)}
.sources-page .history-rules{padding-left:20px;font:14px/1.65 "Google Sans",sans-serif}.history-rules li{padding-left:4px;margin-bottom:12px}.history-rules li::marker{color:var(--history-accent)}
.history-examples{display:grid;gap:0;margin:14px 0 28px;border-block:1px solid var(--history-line)}.history-examples article{padding:18px 0}.history-examples article+article{border-top:1px solid var(--history-line)}.history-examples a{display:block;font-size:13px;margin-bottom:14px;color:var(--history-accent)}.history-examples small{display:block;font:12px/1.5 "Google Sans",sans-serif;opacity:.7}.sources-page .example-opening,.history-examples blockquote{font-size:20px;line-height:1.6;margin:4px 0 12px;text-align:right}.history-examples blockquote{padding:0;border:0}.history-warning{background:color-mix(in srgb,var(--history-accent) 5%,transparent);border-color:var(--history-accent)}.history-table-wrap tbody tr{transition:background 140ms}.history-table-wrap tbody tr:hover{background:color-mix(in srgb,var(--history-accent) 5%,transparent)}
@media(prefers-reduced-motion:reduce){.about-tabs::before,.about-tabs button,.matching-stage summary,.matching-stage summary::after,.history-table-wrap tbody tr{transition:none}}
.sources-page .about-tabs button[aria-selected=true]:hover:not(:disabled){background:transparent;color:#fff}

@media(max-width:720px){
 .about-tabs button{min-width:0;min-height:48px;white-space:normal;font-size:14px}
 .sources-page .project-credit,.matching-stage>p,.history-rules,.history-examples a,.history-examples small,.history-table-wrap caption{font-size:16px}
 .sources-page th{white-space:nowrap}
 .sources-page input,.sources-page select{font-size:16px;min-height:48px}
 .matching-stage summary{min-height:48px}
}

.coverage-table-wrap{max-width:100%;overflow-x:auto}.coverage-table-wrap table{min-width:360px}