/*
Theme Name: SBV Knowledge Hub
Theme URI: https://sucbenvatlieu.com/
Author: Hien Anh Group
Description: Theme kỹ thuật tối ưu cho Knowledge Hub Sức bền vật liệu.
Version: 1.0.0
Text Domain: sbv
*/
:root{--ink:#10202d;--muted:#607080;--line:#e6edf2;--bg:#f5f8fa;--brand:#0d5c63;--accent:#e9a23b;--white:#fff;--radius:16px}
*{box-sizing:border-box}body{margin:0;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:#fff;line-height:1.7}
a{color:var(--brand);text-decoration:none}a:hover{text-decoration:underline}.wrap{width:min(1180px,92%);margin:auto}
.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}
.header-row{min-height:72px;display:flex;align-items:center;gap:24px}.brand{font-weight:900;font-size:20px;color:var(--ink)}.brand span{color:var(--brand)}
.nav{margin-left:auto;display:flex;gap:18px;flex-wrap:wrap}.nav a{font-weight:650;color:var(--ink)}
.hero{background:linear-gradient(135deg,#eef6f6,#fbf5ea);padding:72px 0}.hero-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:40px;align-items:center}
.eyebrow{display:inline-block;font-weight:800;color:var(--brand);letter-spacing:.05em;text-transform:uppercase;font-size:13px}
h1{font-size:clamp(36px,6vw,62px);line-height:1.05;margin:.3em 0}h2{font-size:30px;line-height:1.2}h3{line-height:1.3}.lead{font-size:19px;color:var(--muted)}
.hero-card,.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 12px 30px rgba(16,32,45,.06)}
.hero-card{padding:28px}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.card{padding:22px}.section{padding:56px 0}.soft{background:var(--bg)}
.badge{display:inline-block;background:#eef6f6;padding:5px 10px;border-radius:999px;font-size:12px;font-weight:800}
.post-wrap{display:grid;grid-template-columns:minmax(0,760px) 300px;gap:36px;padding:42px 0}.article{font-size:17px}.article h2{margin-top:1.7em}.article table{width:100%;border-collapse:collapse}.article td,.article th{border:1px solid var(--line);padding:10px}
.sidebar{position:sticky;top:96px;height:max-content}.toc{padding:20px;border:1px solid var(--line);border-radius:14px;background:#fff}
.site-footer{background:#10202d;color:#dce6ec;padding:42px 0}.site-footer a{color:#fff}
.cta-float{position:fixed;right:18px;bottom:18px;z-index:50;display:flex;flex-direction:column;gap:10px}.cta-float a{padding:12px 16px;border-radius:999px;color:white;font-weight:850;box-shadow:0 8px 20px rgba(0,0,0,.18)}.cta-phone{background:#137333}.cta-zalo{background:#0866ff}
@media(max-width:860px){.hero-grid,.grid,.post-wrap{grid-template-columns:1fr}.nav{display:none}.sidebar{position:static}}

.formula{padding:18px 20px;border-left:4px solid var(--brand);background:var(--bg);border-radius:10px;margin:22px 0;font-size:18px}
.sbv-related{margin-top:40px;padding:24px;background:var(--bg);border-radius:var(--radius)}
.sbv-source-note{margin-top:30px;padding:18px;border:1px solid var(--line);border-radius:12px}
.breadcrumb{font-size:14px;color:var(--muted);margin-bottom:18px}
.sbv-calc input{width:min(100%,360px);padding:10px;border:1px solid var(--line);border-radius:8px}
.sbv-calc button{padding:10px 18px;border:0;border-radius:8px;background:var(--brand);color:#fff;font-weight:800;cursor:pointer}