/* HSK-BASE-002/010: retain the source-paper workspace, accommodate Vietnamese UI. */
body{background:#f7f5f2;color:#292524}
.vi-mock-header,.vi-mock-main,.vi-mock-footer{width:min(1440px,calc(100% - 40px));margin-inline:auto}
.vi-mock-header{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:16px;padding:20px 0;border-bottom:1px solid #d9d1ca}
.vi-mock-brand{font-size:28px;font-weight:800;text-decoration:none}
.vi-mock-header nav{display:flex;flex-wrap:wrap;gap:12px}
.vi-mock-header nav a{min-height:44px;padding:10px 12px;border:1px solid #d9d1ca;border-radius:10px}
.vi-mock-main{padding:24px 0}
.vi-mock-main>h1{font-size:clamp(28px,4vw,42px);line-height:1.3}
.vi-mock-main>p{max-width:950px;line-height:1.65}
.vi-mock-notice{padding:16px;background:#fff4df;border:1px solid #cfad6c;border-radius:12px}
.vi-mock-footer{padding:24px 0;line-height:1.6}
.vi-mock-skip{position:absolute;top:-100px;left:16px;background:white;padding:12px;z-index:100}
.vi-mock-skip:focus{top:10px}
[data-mock-locale=vi]{overflow-wrap:anywhere}
[data-mock-locale=vi] button{white-space:normal;min-height:44px;line-height:1.5}
[data-mock-locale=vi] h2{line-height:1.3}
[data-mock-locale=vi] .source-mock-intro dt{flex-shrink:0;white-space:nowrap}
[data-mock-locale=vi] .source-mock-intro dd{min-width:0}
[data-mock-locale=vi] .source-mock-section-switcher>button{min-width:0}
[data-mock-locale=vi] .source-mock-page-controls{flex-wrap:wrap}
[data-mock-locale=vi] .source-mock-page-controls>span{white-space:nowrap}
[data-mock-locale=vi] .source-mock-paper img{max-width:100%}
[data-mock-locale=vi] .source-mock-audio strong,[data-mock-locale=vi] .source-mock-audio small{display:block}
[data-mock-locale=vi] .source-mock-stage__header--timed{scroll-margin-top:16px}
:focus-visible{outline:3px solid #225db0;outline-offset:4px}
@media(max-width:650px){.vi-mock-header,.vi-mock-main,.vi-mock-footer{width:calc(100% - 24px)}[data-mock-locale=vi] .source-mock-intro__start{flex-wrap:wrap}[data-mock-locale=vi] .source-mock-result__hero h2{font-size:48px}}