/* Viện Sinh Hóa Đông Y Dược — giao diện dùng chung cho các trang chính */
:root{
  --green:#0c5f52;--green-dark:#083f37;--green-soft:#e3f2ec;--gold:#c8912f;--gold-soft:#fff6e0;
  --ink:#1d302e;--muted:#5a6d6a;--line:#d6e2de;--bg:#fafaf7;--card:#ffffff;
  --radius:14px;--shadow:0 6px 24px rgba(12,63,55,.08);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:"Be Vietnam Pro","Segoe UI",Arial,sans-serif;line-height:1.65;font-size:17px;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--green)}
a:hover{color:var(--green-dark)}
.wrap{max-width:1140px;margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-999px}.skip:focus{left:12px;top:12px;background:#fff;padding:8px 12px;z-index:10}

/* Header */
.site-header{background:var(--green);color:#fff;position:sticky;top:0;z-index:20;box-shadow:0 2px 10px rgba(0,0,0,.12)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:72px}
.brand{display:flex;align-items:center;gap:12px;color:#fff;text-decoration:none}
.brand img{height:46px;width:auto;background:#fff;border-radius:8px;padding:3px 6px}
.brand strong{display:block;font-size:17px;letter-spacing:.02em;text-transform:uppercase;line-height:1.2}
.brand small{display:block;font-size:12.5px;opacity:.85;font-style:italic}
.brand:hover{color:#fff}
.nav{display:flex;gap:4px;flex-wrap:wrap;justify-content:flex-end}
.nav a{color:#fff;text-decoration:none;font-weight:600;font-size:15px;padding:8px 10px;border-radius:8px;white-space:nowrap}
.nav a:hover{background:rgba(255,255,255,.12);color:#fff}
.nav a[aria-current="page"]{background:rgba(255,255,255,.18)}

/* Hero */
.hero{position:relative;color:#fff;background:var(--green-dark)}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.35}
.hero .wrap{position:relative;padding:96px 20px 88px}
.hero h1{font-size:clamp(34px,5.4vw,58px);line-height:1.1;margin:0 0 18px;letter-spacing:-.02em;max-width:820px}
.hero p.lede{font-size:clamp(18px,2.2vw,22px);max-width:720px;margin:0 0 30px;color:#e9f4f0}
.eyebrow{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:#8c6521;margin-bottom:12px}
.hero .eyebrow{color:#f3cf86}
.page-head{background:var(--green-soft);border-bottom:1px solid var(--line)}
.page-head .wrap{padding:56px 20px 44px}
.page-head h1{font-size:clamp(30px,4.4vw,46px);line-height:1.15;margin:0 0 12px;color:var(--green-dark);letter-spacing:-.015em}
.page-head p{max-width:780px;color:var(--muted);font-size:19px;margin:0}
.crumbs{font-size:14px;color:var(--muted);margin-bottom:14px}.crumbs a{color:var(--muted)}

/* Buttons */
.btns{display:flex;flex-wrap:wrap;gap:12px}
.btn{display:inline-block;padding:13px 24px;border-radius:999px;font-weight:700;text-decoration:none;border:2px solid transparent;font-size:16px}
.btn-primary{background:var(--gold);color:#fff}.btn-primary:hover{background:#b07d22;color:#fff}
.btn-ghost{border-color:#fff;color:#fff}.btn-ghost:hover{background:#fff;color:var(--green-dark)}
.btn-green{background:var(--green);color:#fff}.btn-green:hover{background:var(--green-dark);color:#fff}
.btn-outline{border-color:var(--green);color:var(--green)}.btn-outline:hover{background:var(--green);color:#fff}

/* Sections */
section.block{padding:72px 0}
section.alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{max-width:760px;margin-bottom:34px}
.sec-head h2{font-size:clamp(26px,3.4vw,36px);line-height:1.2;margin:0 0 10px;color:var(--green-dark);letter-spacing:-.01em}
.sec-head p{color:var(--muted);margin:0;font-size:18px}
.grid{display:grid;gap:22px}
.g2{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(3,1fr)}.g4{grid-template-columns:repeat(4,1fr)}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}
.card h3{margin:0 0 8px;font-size:20px;line-height:1.3;color:var(--green-dark)}
.card p{margin:0 0 10px;color:var(--muted)}
.card .tag{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--green);background:var(--green-soft);padding:3px 10px;border-radius:999px;margin-bottom:12px}
.card .tag.gold{color:#8a5d10;background:var(--gold-soft)}
.card .tag.grey{color:#56615f;background:#eef1f0}
a.card{display:block;text-decoration:none;color:inherit;transition:transform .15s,box-shadow .15s}
a.card:hover{transform:translateY(-3px);box-shadow:0 10px 30px rgba(12,63,55,.14)}
.more{font-weight:700;text-decoration:none}
.num{font-size:40px;font-weight:800;color:var(--green);line-height:1}
.step{counter-increment:step}
.steps{counter-reset:step}
.step h3::before{content:counter(step,decimal-leading-zero);display:block;color:var(--gold);font-size:15px;letter-spacing:.1em;margin-bottom:6px}

/* Split media */
.split{display:grid;grid-template-columns:1.05fr 1fr;gap:44px;align-items:center}
.split img{border-radius:var(--radius);box-shadow:var(--shadow)}
.split h2{font-size:clamp(26px,3.2vw,34px);color:var(--green-dark);margin:0 0 14px;line-height:1.2}

/* Prose */
.prose{max-width:800px}
.prose h2{font-size:28px;color:var(--green-dark);margin:44px 0 12px;line-height:1.25}
.prose h3{font-size:21px;color:var(--green-dark);margin:28px 0 8px}
.prose p,.prose li{font-size:17.5px}
.prose ul,.prose ol{padding-left:1.3em}
.prose li{margin:.35em 0}
table.tbl{width:100%;border-collapse:collapse;margin:18px 0;background:#fff;font-size:15.5px}
.tbl th,.tbl td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}
.tbl th{background:var(--green-soft);color:var(--green-dark)}
.tbl-wrap{overflow-x:auto}

/* Notices */
.notice{background:var(--gold-soft);border-left:5px solid var(--gold);padding:16px 20px;border-radius:8px;margin:24px 0;font-size:16px}
.notice.green{background:var(--green-soft);border-color:var(--green)}
.notice strong{color:#6e4a0c}.notice.green strong{color:var(--green-dark)}

/* Product */
.product{display:grid;grid-template-columns:320px 1fr;gap:34px;align-items:start}
.product img{border-radius:var(--radius)}
.pmeta{display:grid;grid-template-columns:140px 1fr;gap:6px 14px;margin:14px 0;font-size:16px}
.pmeta dt{font-weight:700;color:var(--green-dark)}.pmeta dd{margin:0;color:var(--ink)}
.plist .card{display:flex;flex-direction:column}
.plist .card .pmeta{grid-template-columns:110px 1fr;font-size:15px}
.law{font-size:14px;color:#7a4f06;background:var(--gold-soft);padding:8px 12px;border-radius:8px;margin-top:auto}

/* List of articles */
.list{list-style:none;padding:0;margin:0;display:grid;gap:12px}
.list li a{display:block;background:#fff;border:1px solid var(--line);border-radius:10px;padding:14px 18px;text-decoration:none;color:var(--ink)}
.list li a strong{display:block;color:var(--green-dark);font-size:17px}
.list li a span{display:block;color:var(--muted);font-size:15px;margin-top:3px}
.list li a:hover{border-color:var(--green)}

/* Form */
form.contact{display:grid;gap:16px}
form.contact label{font-weight:700;font-size:15px;color:var(--green-dark)}
form.contact input,form.contact textarea,form.contact select{width:100%;font:inherit;padding:12px 14px;border:1px solid #bfd0cb;border-radius:10px;background:#fff;color:var(--ink)}
form.contact input:focus,form.contact textarea:focus{outline:3px solid rgba(12,95,82,.2);border-color:var(--green)}
form.contact .opt{font-weight:400;color:var(--muted)}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:16px}

/* CTA */
.cta{background:var(--green);color:#fff;border-radius:22px;padding:48px;text-align:center}
.cta h2{margin:0 0 10px;font-size:clamp(26px,3.2vw,34px)}
.cta p{margin:0 auto 24px;max-width:640px;color:#e3f2ec}

/* Footer */
.site-footer{background:#0b2724;color:#c9d9d5;margin-top:0;padding:56px 0 30px;font-size:15px}
.site-footer .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:34px}
.site-footer h3{color:#fff;font-size:16px;margin:0 0 12px}
.site-footer a{color:#e8f3f0;text-decoration:none}.site-footer a:hover{text-decoration:underline;color:#fff}
.site-footer ul{list-style:none;padding:0;margin:0}.site-footer li{margin:6px 0}
.site-footer p{margin:6px 0}
.site-footer .legal{border-top:1px solid rgba(255,255,255,.12);margin-top:34px;padding-top:20px;font-size:13.5px;color:#9fb5b0}

/* 8 mục nav (thêm Công cụ): giữ một dòng ở màn hình vừa */
@media (min-width:961px){
  .nav{gap:0;flex-wrap:nowrap}
  .nav a{font-size:14.5px;padding:7px 9px}
  .brand strong{font-size:15.5px;white-space:nowrap}
}
@media (min-width:961px) and (max-width:1150px){
  .nav a{font-size:14px;padding:7px 7px}
  .brand small{display:none}
}
@media (max-width:960px){
  .g4{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(2,1fr)}
  .split,.product{grid-template-columns:1fr}
  .site-footer .cols{grid-template-columns:1fr 1fr}
  .site-header .wrap{flex-direction:column;align-items:flex-start;padding-top:10px;padding-bottom:6px;gap:6px}
  .nav{justify-content:flex-start;flex-wrap:nowrap;overflow-x:auto;width:100%;-webkit-overflow-scrolling:touch;padding-bottom:4px}
  .nav a{white-space:nowrap;padding:6px 10px}
  .site-header{position:static}
}
@media (max-width:640px){
  body{font-size:16px}
  .g2,.g3,.g4,.row2{grid-template-columns:1fr}
  .hero .wrap{padding:60px 16px 56px}
  .wrap{padding:0 16px}
  section.block{padding:52px 0}
  .cta{padding:34px 20px}
  .site-footer .cols{grid-template-columns:1fr}
  .pmeta{grid-template-columns:1fr}
  .brand strong{font-size:15px}.brand img{height:40px}
}