*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:var(--font-sys);font-size:16px;line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:16px}
img{max-width:100%;height:auto;display:block}
.logo img {
    max-width: fit-content;
}
@media (max-width:820px){
.logo img {
    max-width: 100%;
}
}
a{color:var(--link);text-decoration:none}
a:hover{text-decoration:underline}
:focus-visible{outline:2px solid var(--green-dark);outline-offset:2px}

h1,h2,h3{font-family:var(--font-sys);line-height:1.25;margin:0 0 .5em;color:#1B1F21}
h1{font-size:clamp(27px,4.6vw,42px);font-weight:700;letter-spacing:-.01em}
h2{font-size:clamp(21px,3vw,29px);font-weight:700}
h3{font-size:clamp(17px,2vw,20px);font-weight:600}
p{margin:0 0 1em}

.eyebrow{
  font-size:12px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--green-dark);font-weight:700;margin-bottom:8px;
}
.section{padding:48px 0}
.section--white{background:var(--white);border-block:1px solid var(--line)}
.lead{color:var(--muted);max-width:64ch}

/* ============ HEADER + MENU RESPONSIVE ============ */
.site-head{position:sticky;top:0;z-index:50;background:var(--white);box-shadow:0 1px 3px rgba(0,0,0,.08)}
.head-top{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:30px 0}
/* LOGO 150px CĂN GIỮA */
.logo{width:150px;margin-inline:auto;display:block}
.logo svg{width:100%;height:auto;display:block}
.btn-burger{
  display:none;width:42px;height:38px;border:1px solid var(--line);
  background:var(--white);border-radius:4px;cursor:pointer;
}
.btn-burger span{display:block;width:18px;height:2px;background:var(--text);margin:3px auto;border-radius:2px}
.head-cta{font-size:13px;color:var(--muted);white-space:nowrap}

.nav{background:var(--green)}
.nav ul{display:flex;flex-wrap:wrap;justify-content:center;gap:0;list-style:none;margin:0;padding:0}
.nav a{
  display:block;padding:12px 18px;font-size:14px;font-weight:600;
  color:#fff;text-decoration:none;
}
.nav a:hover,.nav a[aria-current="page"]{background:var(--green-dark);text-decoration:none}

@media (max-width:820px){
  .btn-burger{display:block}
  .head-cta{display:none}
  .logo{width:130px;margin:0 auto}
  .nav{display:none}
  .nav.is-open{display:block}
  .nav ul{flex-direction:column;align-items:stretch}
  .nav a{padding:13px 16px;border-bottom:1px solid rgba(255,255,255,.22)}
}

/* ============ HERO + ẢNH NỀN ============ */
.hero{
  text-align:center;padding:40px 0 52px;border-bottom:1px solid var(--line);
  /* Thay URL bên dưới bằng ảnh của bạn: background-image:url('/img/hero.jpg') */
  background-image:
    linear-gradient(180deg,rgba(255,255,255,.90) 0%,rgba(255,255,255,.96) 100%),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='1200' height='560'%3E%3Crect width='1200' height='560' fill='%23EAF2DC'/%3E%3Cg fill='none' stroke='%237CB518' stroke-opacity='.5'%3E%3Cpath d='M600 80 L320 280 L600 480 L880 280 Z'/%3E%3Cpath d='M600 150 L400 280 L600 410 L800 280 Z'/%3E%3Cpath d='M0 280 H1200 M600 0 V560'/%3E%3C/g%3E%3Cg fill='%237CB518'%3E%3Ccircle cx='320' cy='280' r='5'/%3E%3Ccircle cx='880' cy='280' r='5'/%3E%3Ccircle cx='600' cy='80' r='5'/%3E%3Ccircle cx='600' cy='480' r='5'/%3E%3Ccircle cx='600' cy='280' r='7'/%3E%3C/g%3E%3C/svg%3E");
  background-size:cover;background-position:center;
}
.hero h1 span{color:var(--green-dark)}
.hero .lead{margin-inline:auto}

/* ============ THANH TÌM KIẾM ============ */
.search{
  margin:24px auto 14px;max-width:680px;display:flex;gap:0;
  background:var(--white);border:1px solid #C9CFD4;border-radius:var(--radius);
  box-shadow:0 1px 2px rgba(0,0,0,.05);overflow:hidden;
}
.search select,.search input{
  background:var(--white);border:0;color:var(--text);
  font-family:var(--font-sys);font-size:15px;padding:12px 14px;min-width:0;
}
.search select{font-size:14px;color:var(--muted);border-right:1px solid var(--line);flex:0 0 auto;cursor:pointer}
.search input{flex:1 1 auto}
.search input::placeholder{color:#9AA4AE}
.search button{
  flex:0 0 auto;border:0;cursor:pointer;background:var(--green);color:#fff;
  font-family:var(--font-sys);font-weight:700;font-size:15px;padding:12px 26px;
}
.search button:hover{background:var(--green-dark)}
.tags{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;list-style:none;margin:0;padding:0;font-size:13px}
.tags a{display:inline-block;padding:5px 12px;background:var(--white);border:1px solid var(--line);border-radius:99px;color:var(--muted);text-decoration:none}
.tags a:hover{border-color:var(--green);color:var(--green-dark)}
@media (max-width:560px){
  .search{flex-wrap:wrap}
  .search select{width:100%;border-right:0;border-bottom:1px solid var(--line)}
  .search input{width:100%;flex:1 1 100%;border-bottom:1px solid var(--line)}
  .search button{width:100%}
}

/* ============ THẺ DANH MỤC ============ */
.cards{list-style:none;margin:0;padding:0;display:grid;gap:14px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
.cards li{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:18px}
.cards li:hover{border-color:var(--green);box-shadow:0 2px 8px rgba(0,0,0,.06)}
.cards h3{margin-bottom:2px}
.cards p{margin:0;font-size:14px;color:var(--muted)}
.cards .count{font-size:12px;color:var(--green-dark);font-weight:700;margin-bottom:6px}

/* ============ BẢNG ============ */
.table-scroll{overflow-x:auto;background:var(--white);border:1px solid var(--line);border-radius:var(--radius)}
table{width:100%;border-collapse:collapse;min-width:660px;font-size:14px;background:var(--white)}
caption{caption-side:top;text-align:left;padding:12px 14px;font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);border-bottom:1px solid var(--line)}
th,td{padding:11px 14px;text-align:left;border-bottom:1px solid var(--line);vertical-align:middle}
thead th{background:var(--green-soft);font-size:12px;letter-spacing:.05em;text-transform:uppercase;color:var(--green-dark);font-weight:700}
tbody tr:nth-child(even){background:#FAFBFB}
tbody tr:hover{background:var(--green-soft)}
tbody tr:last-child td{border-bottom:0}
.seed{font-family:var(--font-mono);color:var(--green-dark);font-weight:700}
.leech{font-family:var(--font-mono);color:var(--amber)}
.size{font-family:var(--font-mono);color:var(--muted);white-space:nowrap}
.magnet{display:inline-block;font-size:12px;font-weight:700;padding:5px 11px;background:var(--green-soft);border:1px solid #CFE39E;border-radius:4px;color:var(--green-dark);white-space:nowrap}
.magnet:hover{background:var(--green);color:#fff;border-color:var(--green);text-decoration:none}

/* ============ HÌNH ẢNH CĂN GIỮA ============ */
figure{margin:24px auto;text-align:center;max-width:720px}
figure img{margin-inline:auto;border:1px solid var(--line);border-radius:var(--radius);width:100%;background:var(--white)}
figcaption{font-size:13px;color:var(--muted);margin-top:9px}

/* ============ BLOCKQUOTE ============ */
blockquote{
  margin:24px 0;padding:16px 20px;background:var(--green-soft);
  border-left:4px solid var(--green);border-radius:0 var(--radius) var(--radius) 0;
  font-size:17px;color:#2C3327;
}
blockquote cite{display:block;margin-top:8px;font-size:13px;color:var(--muted);font-style:normal}

/* ============ DANH SÁCH ============ */
.list{padding-left:20px;margin:0 0 1em}
.list li{margin-bottom:7px}
.list li::marker{color:var(--green)}

/* ============ NÚT WINDOW.OPEN ============ */
.btn-open{
  display:inline-flex;align-items:center;gap:8px;cursor:pointer;
  background:var(--green);color:#fff;border:0;border-radius:var(--radius);
  font-family:var(--font-sys);font-weight:700;font-size:15px;padding:13px 24px;
}
.btn-open:hover{background:var(--green-dark)}
.btn-ghost{
  display:inline-flex;align-items:center;gap:8px;cursor:pointer;
  background:var(--white);color:var(--text);border:1px solid #C9CFD4;
  border-radius:var(--radius);font-family:var(--font-sys);font-weight:600;font-size:15px;padding:13px 24px;
}
.btn-ghost:hover{border-color:var(--green);color:var(--green-dark)}
.btn-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:18px}

/* ============ ARTICLE ============ */
.article{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:clamp(20px,4vw,40px)}
.article h2{margin-top:0}
.article h3{margin-top:1.6em}
.article table{min-width:0}
.article a{text-decoration:underline}

/* ============ FOOTER ============ */
.site-foot{background:var(--white);border-top:1px solid var(--line);padding:34px 0;font-size:14px;color:var(--muted)}
.foot-grid{display:grid;gap:26px;grid-template-columns:repeat(auto-fit,minmax(180px,1fr))}
.foot-grid h3{font-size:13px;letter-spacing:.08em;text-transform:uppercase;color:var(--text)}
.foot-grid ul{list-style:none;margin:0;padding:0}
.foot-grid li{margin-bottom:7px}
.foot-grid a{color:var(--muted)}
.foot-grid a:hover{color:var(--green-dark)}
.copyright{margin-top:26px;padding-top:18px;border-top:1px solid var(--line);text-align:center;font-size:13px}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{animation:none!important;transition:none!important}
}