/* Dinh Dưỡng Nội Tiết — mobile-first, tông sáng kem/xanh dương */
:root{--cream:#fdf9f1;--cream2:#f7efdf;--ink:#2d2a26;--muted:#6b6259;--blue:#2b6cb0;--blue-d:#1f4e7d;--line:#e8dcc8;--card:#fffdf8;--radius:14px}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;background:var(--cream);color:var(--ink);font-size:17px;line-height:1.75}
img{max-width:100%;height:auto;display:block}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3{line-height:1.35;color:#1f2a37}
h1{font-size:1.65rem;margin:.4em 0 .6em}
h2{font-size:1.35rem;margin:1.6em 0 .6em;padding-top:.4em;border-top:1px solid var(--line)}
h3{font-size:1.15rem;margin:1.4em 0 .5em}
p{margin:0 0 1em}
ul,ol{margin:0 0 1em;padding-left:1.4em}
li{margin-bottom:.45em}
blockquote{margin:1em 0;padding:.6em 1em;border-left:4px solid var(--blue);background:var(--cream2);border-radius:0 8px 8px 0}
hr{border:0;border-top:1px solid var(--line);margin:1.8em 0}
.container{max-width:720px;margin:0 auto;padding:0 16px}
.wide{max-width:960px}
/* header */
.site-header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.site-header .container{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:10px;padding-bottom:10px}
.brand{font-size:1.25rem;font-weight:800;color:var(--blue-d);white-space:nowrap}
.brand small{display:block;font-size:.8rem;font-weight:600;color:var(--muted)}
.main-nav{display:flex;gap:4px;flex-wrap:wrap;justify-content:flex-end}
.main-nav a{color:var(--ink);font-size:.95rem;padding:10px 10px;border-radius:8px;min-height:44px;display:inline-flex;align-items:center}
.main-nav a:hover{background:var(--cream2);text-decoration:none}
.main-nav a.active{color:var(--blue);font-weight:700}
/* hero */
.hero{background:linear-gradient(180deg,#eaf2fa,#fdf9f1);padding:28px 0 22px;text-align:center}
.hero h1{font-size:1.8rem;margin:0 0 .3em}
.hero .slogan{font-size:1.1rem;color:var(--blue-d);font-weight:600;margin:0 0 .8em}
.hero .intro{max-width:620px;margin:0 auto;color:#3d3a35}
/* article list */
.section{padding:26px 0}
.section h2{border:0;padding:0;margin:0 0 .2em;font-size:1.4rem}
.section .sub{color:var(--muted);margin:0 0 1.2em}
.cards{display:grid;gap:16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.card img{width:100%;aspect-ratio:3/2;object-fit:cover}
.card-body{padding:14px 16px 16px}
.card-body h3{margin:0 0 .35em;font-size:1.15rem}
.card-body h3 a{color:var(--ink)}
.card-date{font-size:.85rem;color:var(--muted);margin-bottom:.4em}
.card-excerpt{color:#4a443c;margin:0;font-size:.98rem}
.badge{display:inline-block;background:#e3eefb;color:var(--blue-d);font-size:.8rem;font-weight:700;padding:3px 10px;border-radius:999px;margin-bottom:.5em}
.cluster-grid{display:grid;grid-template-columns:1fr;gap:12px}
.cluster-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px}
.cluster-card h3{margin:0 0 .3em;font-size:1.1rem}
.cluster-card h3 a{color:var(--ink)}
.cluster-card p{margin:0;color:var(--muted);font-size:.95rem}
.cluster-card .count{font-size:.85rem;color:var(--blue);font-weight:600}
/* article */
.article{padding:22px 0 8px}
.article-meta{color:var(--muted);font-size:.92rem;margin-bottom:.4em}
.article-meta a{color:var(--muted)}
.article h1{margin-top:.1em}
.art-img{margin:1.4em 0}
.art-img img{border-radius:12px;width:100%}
.art-img figcaption{font-size:.85rem;color:var(--muted);text-align:center;margin-top:.4em}
.read-more{background:#eef5fd;border:1px solid #cfe2f5;border-radius:10px;padding:12px 16px;margin:1.2em 0}
.read-more p{margin:0}
.read-more a{font-weight:700}
.future-link{color:var(--ink)}
.related-list{list-style:none;padding:0}
.related-list li{margin-bottom:.6em}
.table-wrap{overflow-x:auto;margin:1.2em 0;border:1px solid var(--line);border-radius:10px}
.table-wrap table{width:100%;border-collapse:collapse;font-size:.95rem;min-width:480px}
.table-wrap th,.table-wrap td{padding:10px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.table-wrap th{background:var(--cream2);font-weight:700}
.table-wrap tr:last-child td{border-bottom:0}
.disclaimer{background:#fdf3e3;border:1px solid #f0dcb8;border-radius:10px;padding:14px 16px;font-size:.95rem;margin:1.6em 0}
.sources{font-size:.95rem;color:var(--muted)}
.sources p{margin-bottom:.3em}
/* share */
.share{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:16px 0;margin:1.8em 0}
.share p{font-weight:700;margin:0 0 .7em}
.share-btns{display:flex;gap:10px;flex-wrap:wrap}
.share-btn{display:inline-flex;align-items:center;gap:6px;min-height:44px;padding:10px 16px;border-radius:999px;border:1px solid var(--line);background:#fff;color:var(--ink);font-size:.95rem;font-weight:600;cursor:pointer}
.share-btn:hover{text-decoration:none;background:var(--cream2)}
.share-btn.fb{color:#1877f2}.share-btn.zalo{color:#008fe5}.share-btn.pin{color:#e60023}
.share-note{font-size:.85rem;color:var(--muted);margin-top:.6em}
/* comments */
.comments{margin:1.8em 0 2em}
.comments h2{border:0;padding:0}
/* forms */
.form label{display:block;font-weight:700;margin:0 0 .35em}
.form input,.form textarea{width:100%;padding:12px 14px;font-size:1rem;border:1px solid #d8cbb2;border-radius:10px;font-family:inherit;margin-bottom:1em;background:#fff}
.form textarea{min-height:140px;resize:vertical}
.btn{display:inline-block;min-height:48px;padding:12px 26px;border:0;border-radius:999px;background:var(--blue);color:#fff;font-size:1rem;font-weight:700;cursor:pointer}
.btn:hover{background:var(--blue-d)}
/* footer */
.site-footer{background:#fff;border-top:1px solid var(--line);padding:26px 0 30px;margin-top:20px}
.site-footer nav{display:flex;gap:4px;flex-wrap:wrap;margin-bottom:12px}
.site-footer nav a{color:var(--ink);padding:8px 10px;font-size:.95rem;min-height:44px;display:inline-flex;align-items:center}
.site-footer p{color:var(--muted);font-size:.9rem;margin:.3em 0}
.empty-note{background:var(--card);border:1px dashed var(--line);border-radius:var(--radius);padding:20px;text-align:center;color:var(--muted)}
@media(min-width:640px){
  h1{font-size:2rem}
  .cards{grid-template-columns:1fr 1fr}
  .cluster-grid{grid-template-columns:1fr 1fr}
  .card.featured{grid-column:1/-1}
  .card.featured img{aspect-ratio:16/7}
}