:root{--paper:#f8f8f2;--ink:#202620;--muted:#6b7064;--line:#dddfd4;--orange:#ec633c;--green:#426538}
*{box-sizing:border-box}
body{margin:0;background:var(--paper);color:var(--ink);font-family:'Be Vietnam Pro',system-ui,sans-serif;font-size:16px;line-height:1.7}
a{color:inherit}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--orange);outline-offset:3px}
.dg-head,.dg-main,.dg-foot{max-width:720px;margin:0 auto;padding-left:16px;padding-right:16px}
.dg-head{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px 16px;padding-top:18px;padding-bottom:14px;border-bottom:1px solid var(--line)}
.logo{font-family:'Space Grotesk',system-ui,sans-serif;font-weight:700;font-size:24px;text-decoration:none;letter-spacing:-1px}
.logo span{color:var(--orange)}
.dg-head .logo{margin-right:auto}
.site-nav{display:flex;gap:4px;font-size:14px}
.site-nav a{text-decoration:none;color:var(--muted);font-weight:600;padding:6px 12px;border-radius:999px;white-space:nowrap}
.site-nav a:hover{color:var(--ink);background:#eceee4}
.site-nav a[aria-current]{background:var(--ink);color:#fff}
.langs{display:flex;gap:4px;font-size:14px}
.langs a{padding:4px 10px;border-radius:6px;text-decoration:none;color:var(--muted)}
.langs [aria-current]{background:#e6edda;color:var(--green);font-weight:700}
@media (max-width:560px){.site-nav{order:3;width:100%;justify-content:space-between}.site-nav a{flex:1;text-align:center}}
.dg-main{padding-top:28px;padding-bottom:48px}
h1{font-size:clamp(26px,5vw,36px);line-height:1.3;letter-spacing:-.5px;margin:0 0 8px;overflow-wrap:anywhere}
.meta{color:var(--muted);font-size:14px;margin:0 0 20px}
.intro{margin:20px 0 8px}
.subscribe{background:#edf1e5;border:1px solid #dbe2ce;border-radius:12px;padding:16px;margin:20px 0}
.subscribe label{display:block;font-size:14px;font-weight:600;margin-bottom:8px}
.subscribe-row{display:flex;gap:8px;flex-wrap:wrap}
.subscribe input[type=email]{flex:1 1 200px;min-width:0;padding:10px 12px;border:1px solid #cdd6be;border-radius:8px;background:#fffdf8;font:inherit}
.subscribe button{padding:10px 18px;border:0;border-radius:8px;background:var(--ink);color:#fff;font:inherit;font-weight:600;cursor:pointer}
.subscribe button:disabled{opacity:.6;cursor:wait}
.subscribe p{margin:8px 0 0;font-size:14px;min-height:1.2em}
.subscribe .error{color:#a03626}
.trap{position:absolute;left:-10000px;width:1px;height:1px;overflow:hidden}
.dg-section h2{font-size:14px;letter-spacing:1px;text-transform:uppercase;color:var(--green);border-bottom:1px solid var(--line);padding-bottom:6px;margin:36px 0 16px}
.dg-item{margin-bottom:24px}
.dg-item h3{font-size:19px;line-height:1.5;margin:0 0 6px;overflow-wrap:anywhere}
.dg-item p{margin:0 0 6px;overflow-wrap:anywhere}
.dg-item .sources{font-size:13px;color:var(--muted)}
.dg-item .sources a{color:var(--green);font-weight:600}
.archive{list-style:none;padding:0;margin:20px 0}
.archive li{display:flex;justify-content:space-between;gap:12px;padding:12px 0;border-bottom:1px solid var(--line)}
.archive a{font-weight:600;text-decoration:none}
.archive a:hover{text-decoration:underline}
.archive span{color:var(--muted);font-size:14px}
.dg-foot{display:flex;justify-content:space-between;gap:12px;padding-top:18px;padding-bottom:30px;border-top:1px solid var(--line);color:var(--muted);font-size:13px}
.dg-foot .logo{font-size:18px;color:var(--ink)}
.donate-card{margin:40px 0 0;background:#f4e8dc;border:1px solid #e8d5c3;padding:24px;border-radius:12px}
.donate-card .eyebrow{font-size:11px;font-weight:700;letter-spacing:1.2px;color:#84705c}
.donate-heart{display:block;font-size:36px;color:#c96843;margin:12px 0 6px}
.donate-card h3{font-size:22px;line-height:1.35;margin:0 0 12px}
.donate-card p{font-size:14px;line-height:1.8;color:#706252;margin:0 0 12px}
.donate-card small{display:block;font-size:12px;line-height:1.7;margin-top:16px;color:#84705c}
.donate-pending{border-top:1px solid #dfc9b3;padding-top:12px}
.donate-qr{display:block;position:relative;overflow:hidden;aspect-ratio:1;max-width:260px;margin:16px auto 8px;background:#fff;border:10px solid #fff;border-radius:10px}
.donate-qr img{position:absolute;width:180%;max-width:none;height:auto;left:-40%;top:-130%;display:block}
.donate-qr:focus-visible{outline:3px solid #c96843;outline-offset:3px}
.donate-card .donate-qr-help{font-size:12px;text-align:center}
.donate-qr-help a{text-decoration:underline;text-underline-offset:3px}
.donate-bank{margin:16px 0;background:#fff9f1;padding:14px;border-radius:8px}
.donate-bank>div+div{margin-top:12px}
.donate-bank dt{font-size:12px;color:#8c7965;margin-bottom:2px}
.donate-bank dd{margin:0;font-size:15px;font-weight:600;overflow-wrap:anywhere}
.donate-link{display:inline-block;margin-top:8px;padding:10px 18px;border-radius:8px;background:var(--ink);color:#fff;font-size:14px;font-weight:600;text-decoration:none}
.share{margin:16px 0}
.share-label{display:block;font-size:13px;color:var(--muted);margin-bottom:8px}
.share-row{display:flex;flex-wrap:wrap;gap:8px}
.share-btn{display:inline-flex;align-items:center;min-height:36px;padding:6px 14px;border:1px solid var(--line);border-radius:999px;background:#fffdf8;color:var(--ink);font:inherit;font-size:14px;font-weight:600;text-decoration:none;cursor:pointer}
.share-btn:hover{border-color:var(--ink)}
.share-btn[hidden]{display:none}
.share-native{background:var(--orange);border-color:var(--orange);color:#fff}
.share-native:hover{border-color:#c94f2c;background:#d9552f}
.share-end{margin:36px 0 0;padding:20px;border:1px dashed #cdd6be;border-radius:12px;background:#fffdf8}
.share-end .share-label{font-size:16px;font-weight:600;color:var(--ink)}

.eyebrow{font-size:11px;font-weight:700;letter-spacing:1.2px;text-transform:uppercase;color:var(--muted);margin:0}
.dg-pager{display:flex;justify-content:space-between;gap:12px;margin:36px 0 0;padding-top:16px;border-top:1px solid var(--line);font-size:15px}
.dg-pager a{text-decoration:none;font-weight:600}
.dg-pager a[rel=next]{text-align:right}
.dg-pager small{display:block;font-size:12px;font-weight:400;color:var(--muted)}
.dg-pager a:hover{color:var(--green)}
.teaser{display:block;margin:32px 0 0;padding:16px 18px;border:1px solid var(--line);border-left:4px solid var(--orange);border-radius:12px;background:#fffdf8;text-decoration:none}
.teaser-news{border-left-color:var(--green)}
.teaser strong{display:block;font-size:17px;line-height:1.45;margin:4px 0;overflow-wrap:anywhere}
.teaser-meta{font-size:13px;color:var(--muted)}
.teaser:hover{border-color:var(--ink)}
.archive-jump{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0 4px}
.archive-jump a{padding:6px 14px;border:1px solid var(--line);border-radius:999px;background:#fffdf8;text-decoration:none;font-size:14px;font-weight:600}
.archive-group h2{font-size:14px;letter-spacing:1px;text-transform:uppercase;color:var(--green);margin:32px 0 0}
#nghien-cuu h2{color:#b4512f}
/* Research roundups */
.pp-hero{padding-bottom:4px}
.pp-eyebrow{color:#b4512f;margin-bottom:8px}
.pp-intro{margin:16px 0 0;padding:14px 16px;background:#fffdf8;border:1px solid var(--line);border-left:3px solid var(--orange);border-radius:0 10px 10px 0;font-size:16px}
.pp-toc{display:flex;flex-wrap:wrap;gap:8px;margin:20px 0 0}
.pp-toc a{display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border:1px solid var(--line);border-radius:999px;background:#fffdf8;font-size:13px;font-weight:600;text-decoration:none}
.pp-toc a:hover{border-color:var(--ink)}
.pp-toc span{display:inline-grid;place-items:center;min-width:20px;height:20px;padding:0 5px;border-radius:999px;background:#f4e8dc;color:#8a4a2c;font-size:11px}
.pp-section{scroll-margin-top:16px}
.pp-section h2{display:flex;align-items:center;gap:10px;font-size:14px;letter-spacing:1px;text-transform:uppercase;color:#b4512f;margin:40px 0 14px}
.pp-section h2::after{content:"";flex:1;height:1px;background:var(--line)}
.pp-card{background:#fffdf8;border:1px solid var(--line);border-radius:14px;padding:18px 20px;margin:0 0 14px;box-shadow:0 1px 0 rgba(32,38,32,.04)}
.pp-card:target{border-color:var(--orange)}
.pp-card-head{display:flex;align-items:flex-start;gap:12px;margin-bottom:10px}
.pp-num{flex:none;display:inline-grid;place-items:center;width:28px;height:28px;margin-top:2px;border-radius:50%;background:var(--ink);color:#fff;font-size:13px;font-weight:700}
.pp-card h3{font-size:19px;line-height:1.45;margin:0;overflow-wrap:anywhere}
.pp-summary{margin:0 0 10px;overflow-wrap:anywhere}
.pp-why{margin:0 0 12px;padding:10px 14px;background:#edf1e5;border-radius:10px;font-size:15px;line-height:1.65;overflow-wrap:anywhere}
.pp-why strong{display:block;font-size:11px;letter-spacing:1px;text-transform:uppercase;color:var(--green);margin-bottom:2px}
.pp-links{display:flex;flex-wrap:wrap;gap:8px;margin:0}
.pp-src{display:inline-flex;align-items:center;gap:4px;min-height:32px;padding:4px 12px;border:1px solid #cdd6be;border-radius:999px;color:var(--green);font-size:13px;font-weight:600;text-decoration:none;overflow-wrap:anywhere}
.pp-src:hover{background:#e6edda}
.pp-src-pdf{border-color:#e8d5c3;color:#b4512f}
.pp-src-pdf:hover{background:#f4e8dc}
@media (max-width:560px){.pp-card{padding:16px}.pp-card h3{font-size:17px}}