/*
Theme Name: VNL Kaomoji
Description: Giao diện kho kiến thức CNTT phổ thông, kaomoji & emoji.
Version: 1.0
*/

:root{
  --bg:#fbf8f4;
  --card:#ffffff;
  --text:#2a1a12;
  --muted:#6b5a4f;
  --accent:#7c2d12;
  --accent-2:#b9562f;
  --line:#ece3d8;
  --radius:12px;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"Inter",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.65;
}
h1,h2,h3,h4{
  font-family:"Plus Jakarta Sans","Inter",system-ui,sans-serif;
  font-weight:700;
  line-height:1.25;
  color:var(--text);
}
h1{font-size:clamp(1.7rem,4vw,2.4rem);margin:.2em 0 .4em;}
h2{font-size:clamp(1.25rem,3vw,1.6rem);margin:1.6em 0 .6em;}
h3{font-size:1.1rem;margin:1.2em 0 .5em;}
a{color:var(--accent);text-decoration:none;}
a:hover{text-decoration:underline;}
img{max-width:100%;height:auto;display:block;}
p{margin:0 0 1em;}

.wrap{max-width:1040px;margin:0 auto;padding:0 18px;}

/* header */
.site-header{background:var(--card);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50;}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;padding:12px 18px;gap:12px;}
.brand{display:flex;align-items:center;gap:8px;font-family:"Plus Jakarta Sans",sans-serif;font-weight:800;font-size:1.15rem;color:var(--text);}
.brand img{width:32px;height:32px;border-radius:8px;}
.main-nav{display:flex;flex-wrap:wrap;gap:4px 14px;font-size:.92rem;}
.main-nav a{color:var(--muted);font-weight:600;}
.main-nav a:hover{color:var(--accent);}
.nav-toggle{display:none;}
@media (max-width:760px){
  .main-nav{display:none;width:100%;order:3;padding-top:8px;flex-direction:column;}
  .site-header .wrap{flex-wrap:wrap;}
  .nav-toggle{display:inline-block;background:none;border:1px solid var(--line);border-radius:8px;padding:6px 10px;}
  .nav-toggle[aria-expanded="true"] + .main-nav,
  .main-nav.is-open{display:flex;}
}

/* hero */
.hero{padding:28px 0 8px;}
.hero p.lede{font-size:1.05rem;color:var(--muted);max-width:700px;}

/* tool */
.tool-box{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px;margin:14px 0 22px;}
.tool-row{display:flex;gap:10px;flex-wrap:wrap;}
.tool-row input[type=search]{flex:1 1 240px;padding:10px 14px;border:1px solid var(--line);border-radius:10px;font-size:1rem;}
.tool-row select{padding:10px 12px;border:1px solid var(--line);border-radius:10px;font-size:.95rem;background:#fff;}
.chip-row{display:flex;flex-wrap:wrap;gap:6px;margin-top:12px;}
.chip{border:1px solid var(--line);background:#fff;border-radius:999px;padding:5px 12px;font-size:.82rem;color:var(--muted);cursor:pointer;}
.chip.is-active,.chip:hover{border-color:var(--accent);color:var(--accent);}

/* grid groups */
.kw-group{margin:22px 0;scroll-margin-top:72px;}
.kw-group h2{display:flex;align-items:center;gap:8px;font-size:1.15rem;margin-bottom:10px;}
.kw-group h2 .cnt{font-size:.75rem;background:var(--line);color:var(--muted);border-radius:999px;padding:2px 8px;font-weight:600;}
.kw-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(118px,1fr));gap:8px;}
.kw-item{
  background:var(--card);border:1px solid var(--line);border-radius:10px;
  padding:10px 8px;text-align:center;cursor:pointer;font-size:1rem;
  word-break:break-word;transition:border-color .15s,transform .1s;
}
.kw-item:hover{border-color:var(--accent-2);}
.kw-item:active{transform:scale(.96);}
.kw-item.copied{border-color:var(--accent);background:#fdf1ea;}
.kw-item.copied::after{content:"✓ đã chép";display:block;font-size:.68rem;color:var(--accent);margin-top:2px;font-weight:700;}
.kw-item[hidden]{display:none;}

/* link grid to pillars */
.pillar-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px;margin:18px 0;}
.pillar-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px;}
.pillar-card h3{margin-top:0;font-size:1rem;}
.pillar-card p{font-size:.9rem;color:var(--muted);margin-bottom:8px;}

/* content card */
.content-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px;margin:18px 0;}

table{border-collapse:collapse;width:100%;font-size:.92rem;}
.table-scroll{overflow-x:auto;margin:1em 0;}
.table-scroll table{min-width:420px;}
th,td{border:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top;}
th{background:#f4ece2;}

figure.wp-block-image,.aligncenter{display:block;margin:1.4em auto;text-align:center;}
figure.wp-block-image img{margin:0 auto;}
figcaption{text-align:center;font-size:.85rem;color:var(--muted);margin-top:6px;}

.toc{background:#f4ece2;border-radius:var(--radius);padding:14px 18px;margin:16px 0;font-size:.92rem;}
.toc summary{cursor:pointer;font-weight:700;}
.toc ol{margin:.6em 0 0;padding-left:1.2em;}

.faq-item{border-top:1px solid var(--line);padding:14px 0;}
.faq-item h3{margin:0 0 6px;font-size:1rem;}

.byline{color:var(--muted);font-size:.86rem;margin:4px 0 18px;}

.ugc-box{background:var(--card);border:1px dashed var(--accent-2);border-radius:var(--radius);padding:18px;margin:26px 0;}
.ugc-box textarea,.ugc-box input[type=text]{width:100%;padding:10px;border:1px solid var(--line);border-radius:8px;font-size:.95rem;margin-bottom:8px;}
.ugc-box button{background:var(--accent);color:#fff;border:none;border-radius:999px;padding:9px 20px;font-weight:700;cursor:pointer;}
.ugc-list{margin-top:14px;display:flex;flex-wrap:wrap;gap:8px;}

footer.site-footer{border-top:1px solid var(--line);margin-top:40px;padding:26px 0;font-size:.85rem;color:var(--muted);}
footer.site-footer .wrap{display:flex;flex-wrap:wrap;gap:8px 18px;justify-content:space-between;}
footer.site-footer a{color:var(--muted);}
footer.site-footer a:hover{color:var(--accent);}

.related-posts{margin:30px 0;}
.related-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px;}
.related-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:12px;}
.related-card img{border-radius:8px;margin-bottom:8px;}

.skip-link{position:absolute;left:-999px;top:0;background:var(--accent);color:#fff;padding:8px 14px;z-index:999;}
.skip-link:focus{left:10px;top:10px;}