/* ============ MQH — CSS dùng chung cho blog.html + trang bài đơn ============ */
:root{
--green:#1b6e4f; --green-d:#13513a; --green-l:#e8f3ee;
--gold:#c2933b; --gold-l:#f7efdc;
--ink:#1f2a26; --muted:#6b7a73; --line:#e2e8e4;
--bg:#f4f7f5; --card:#ffffff; --radius:16px;
--shadow:0 4px 18px rgba(20,60,45,.08);
--shadow-lg:0 10px 34px rgba(20,60,45,.14);
--font:"Be Vietnam Pro","Segoe UI",system-ui,-apple-system,Roboto,Arial,sans-serif;
--maxw-read:760px; --maxw:1180px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--bg);color:var(--ink);line-height:1.7}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 18px}
/* Header */
header.site{position:sticky;top:0;z-index:40;background:rgba(255,255,255,.94);
backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.navbar{display:flex;align-items:center;gap:14px;height:62px}
.brand{display:flex;align-items:center;gap:11px;font-weight:800;color:var(--green);font-size:17px}
.brand .mark{width:36px;height:36px;border-radius:11px;background:linear-gradient(135deg,var(--green),var(--green-d));
color:#fff;display:grid;place-items:center;font-size:18px;box-shadow:var(--shadow);overflow:hidden}
.brand .mark:has(img){background:#fff}
.brand .mark img{width:100%;height:100%;object-fit:contain;border-radius:inherit}
footer.site .brand .mark:has(img){background:#fff}
.brand small{display:block;font-size:11px;font-weight:600;color:var(--muted)}
.nav-links{display:flex;gap:4px;margin-left:18px}
.nav-links a{padding:9px 14px;border-radius:10px;color:var(--muted);font-weight:600;font-size:14.5px}
.nav-links a:hover,.nav-links a.on{background:var(--green-l);color:var(--green)}
.nav-right{margin-left:auto}
.btn{border:0;border-radius:11px;padding:9px 16px;font-weight:700;cursor:pointer;font-size:14px;
font-family:var(--font);display:inline-flex;align-items:center;gap:7px;transition:.15s}
.btn.primary{background:var(--green);color:#fff}.btn.primary:hover{background:var(--green-d)}
.btn.ghost{background:var(--green-l);color:var(--green)}.btn.ghost:hover{background:#d8ebe2}
.btn.gold{background:var(--gold);color:#2a1e06}
/* Covers */
.cov-grad.c1,.rc.c1,.art-cover.c1{background:linear-gradient(135deg,#1b6e4f,#13513a)}
.cov-grad.c2,.rc.c2,.art-cover.c2{background:linear-gradient(135deg,#2f7d8f,#1d5360)}
.cov-grad.c3,.rc.c3,.art-cover.c3{background:linear-gradient(135deg,#b8863a,#8a651f)}
.cov-grad.c4,.rc.c4,.art-cover.c4{background:linear-gradient(135deg,#4f7d3a,#356026)}
.cov-grad.g1,.rc.g1,.art-cover.g1{background:linear-gradient(135deg,#1b6e4f,#13513a)}
.cov-grad.g2,.rc.g2,.art-cover.g2{background:linear-gradient(135deg,#3a6f7d,#22505c)}
.cov-grad.g3,.rc.g3,.art-cover.g3{background:linear-gradient(135deg,#8a6a2f,#5f4815)}
/* ===== Blog list ===== */
.page-head{background:linear-gradient(135deg,#0f2a20,#16513a 60%,#1b6e4f);color:#eaf5ef}
.page-head .wrap{padding:46px 18px 50px;max-width:860px}
.page-head .kicker{color:var(--gold);font-weight:700;font-size:13px;letter-spacing:.6px;text-transform:uppercase}
.page-head h1{font-size:clamp(26px,4.6vw,38px);font-weight:800;margin:8px 0 12px}
.page-head p{color:#cfe6db;font-size:16px;max-width:620px}
.list-wrap{padding:40px 0 60px}
.blog-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.bcard{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
box-shadow:var(--shadow);transition:.18s;display:flex;flex-direction:column}
.bcard:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.bcard .cv{height:150px;display:grid;place-items:center;font-size:46px;color:#fff;position:relative;overflow:hidden}
.bcard .cv img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.bcard .bb{padding:16px 18px 20px;display:flex;flex-direction:column;flex:1}
.chip{display:inline-block;background:var(--green-l);color:var(--green);font-weight:700;font-size:12.5px;
padding:5px 11px;border-radius:999px;margin-bottom:10px;align-self:flex-start}
.chip.gold{background:var(--gold-l);color:#8a661f}
.bcard h2{font-size:17px;font-weight:700;line-height:1.35;margin-bottom:8px}
.bcard p{color:var(--muted);font-size:14px;flex:1}
.bcard .date{color:var(--muted);font-size:12.5px;margin-top:12px}
/* ===== Single article ===== */
.art-cover{height:210px;display:grid;place-items:center;font-size:74px;color:#fff;overflow:hidden;position:relative}
.art-cover img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.art-hero{background:linear-gradient(135deg,#0f2a20,#16513a 60%,#1b6e4f);color:#eaf5ef}
.art-hero .wrap{max-width:var(--maxw-read);padding:28px 18px 32px}
.crumb{font-size:13.5px;color:#a9ccbd;margin-bottom:14px}
.crumb a{color:#cfe6db;font-weight:600}.crumb a:hover{color:#fff}
.art-tag{display:inline-block;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.25);
color:#dff0e8;font-weight:700;font-size:12.5px;padding:6px 13px;border-radius:999px;margin-bottom:14px}
.art-hero h1{font-size:clamp(23px,4.2vw,33px);font-weight:800;line-height:1.26;margin-bottom:12px}
.art-hero .lead{color:#cfe6db;font-size:15.5px;font-style:italic;margin-bottom:12px}
.art-meta{display:flex;gap:16px;flex-wrap:wrap;color:#bcdccc;font-size:13.5px}
article.post{max-width:var(--maxw-read);margin:0 auto;padding:32px 18px 36px}
.post .lead-tags{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:20px}
.post p{margin-bottom:15px;color:#33423c;font-size:16.5px}
.post h3{font-size:20px;font-weight:800;color:var(--green-d);margin:26px 0 11px}
.post h4{font-size:17px;font-weight:700;color:var(--ink);margin:18px 0 8px}
.post ul{margin:0 0 16px 22px;color:#33423c}
.post li{margin-bottom:8px;font-size:16px}
.post b{color:var(--ink)}
.post blockquote{border-left:4px solid var(--green);background:#f4f9f6;margin:18px 0;padding:13px 18px;
border-radius:8px;color:#33423c;font-style:italic;font-size:16px}
.post blockquote b{font-style:normal;color:var(--ink)}
.post .note{background:var(--gold-l);border-left:4px solid var(--gold);padding:15px 17px;border-radius:10px;
font-size:14px;color:#6e5824;font-style:italic;margin:22px 0}
.post .note a{color:var(--green);font-weight:700;font-style:normal}
.cta-box{max-width:var(--maxw-read);margin:8px auto 0;padding:0 18px}
.cta-inner{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:22px 24px;
box-shadow:var(--shadow);display:flex;gap:18px;align-items:center;flex-wrap:wrap}
.cta-inner .t b{font-size:17px;display:block;margin-bottom:3px}
.cta-inner .t span{color:var(--muted);font-size:14px}
.cta-inner .act{margin-left:auto;display:flex;gap:10px;flex-wrap:wrap}
.related{max-width:var(--maxw-read);margin:0 auto;padding:26px 18px 40px}
.related h3{font-size:18px;font-weight:800;margin-bottom:16px}
.rel-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.rcard{background:var(--card);border:1px solid var(--line);border-radius:14px;overflow:hidden;
box-shadow:var(--shadow);transition:.16s;display:flex;flex-direction:column}
.rcard:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.rcard .rc{height:96px;display:grid;place-items:center;font-size:34px;color:#fff}
.rcard .rb{padding:13px 15px 16px}
.rcard .rb h3{font-size:15px;font-weight:700;line-height:1.35;color:var(--ink);margin:0}
/* Disclaimer + footer */
.disclaimer{background:var(--gold-l);border-top:1px solid #ecdcb6;border-bottom:1px solid #ecdcb6}
.disclaimer .wrap{max-width:var(--maxw-read);padding:16px 18px;display:flex;gap:12px;align-items:flex-start}
.disclaimer .ic{font-size:19px}.disclaimer p{font-size:13px;color:#6e5824;font-style:italic}
footer.site{background:#0f2a20;color:#9fc0b2;padding:40px 0 90px}
footer.site .cols{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:30px;margin-bottom:22px}
footer.site h5{color:#fff;font-size:14px;font-weight:700;margin-bottom:12px;letter-spacing:.4px}
footer.site a,footer.site p{color:#9fc0b2;font-size:14px;line-height:1.9;display:block}
footer.site a:hover{color:#fff}
footer.site .brand{display:flex;align-items:center;gap:10px;color:#fff;margin-bottom:12px}
footer.site .brand .mark{width:36px;height:36px;border-radius:11px;background:linear-gradient(135deg,var(--green),var(--green-d));display:grid;place-items:center;font-size:18px}
footer.site .brand small{color:#7fa493}
.foot-legal{border-top:1px solid #1d4636;padding-top:16px;margin-bottom:14px}
.foot-legal p{font-size:12px;line-height:1.7;color:#86a89a;margin-bottom:6px}
.foot-legal b{color:#cde0d6}
.foot-bottom{border-top:1px solid #1d4636;padding-top:14px;font-size:12.5px;color:#7fa493}
@media(max-width:720px){footer.site .cols{grid-template-columns:1fr}}
/* Bottom app nav (mobile) */
.appnav{display:none;position:fixed;bottom:0;left:0;right:0;z-index:60;background:#fff;
border-top:1px solid var(--line);box-shadow:0 -4px 18px rgba(20,60,45,.10);
padding:7px 6px calc(7px + env(safe-area-inset-bottom));grid-template-columns:repeat(5,1fr)}
.appnav a{display:flex;flex-direction:column;align-items:center;gap:3px;padding:6px 0;color:var(--muted);font-size:11px;font-weight:600}
.appnav a .ic{font-size:21px;line-height:1}
.appnav a:active{transform:scale(.94)}.appnav a.on{color:var(--green)}
/* =====================================================================
GIAO DIỆN KHOÁ HỌC (khác hẳn blog) — kiểu học viện MQH Academy
===================================================================== */
.course-hero{background:linear-gradient(120deg,#0f2a20,#16513a 55%,#1b6e4f);color:#eaf5ef;position:relative;overflow:hidden}
.course-hero::after{content:"";position:absolute;right:-110px;top:-110px;width:360px;height:360px;
background:radial-gradient(circle,rgba(194,147,59,.34),transparent 70%);border-radius:50%}
.course-hero .wrap{position:relative;z-index:2;display:grid;grid-template-columns:1.5fr .9fr;gap:30px;
align-items:center;padding:34px 18px 40px;max-width:var(--maxw)}
.course-hero .crumb{color:#a9ccbd}.course-hero .crumb a{color:#cfe6db}
.ch-badges{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:12px}
.ch-badge{font-size:12px;font-weight:700;padding:5px 12px;border-radius:999px}
.ch-badge.pub{background:#dff3e7;color:#15633f}.ch-badge.priv{background:#fde9d6;color:#9a5a14}
.ch-badge.lvl{background:rgba(255,255,255,.14);color:#dff0e8;border:1px solid rgba(255,255,255,.25)}
.course-hero h1{font-size:clamp(24px,4vw,34px);font-weight:800;line-height:1.22;margin-bottom:8px}
.course-hero .sub{color:#cfe6db;font-size:15.5px;margin-bottom:16px}
.ch-meta{display:flex;gap:18px;flex-wrap:wrap;color:#cfe6db;font-size:14px;margin-bottom:20px}
.ch-meta b{color:#fff}
.course-hero .btn.gold{box-shadow:0 8px 22px rgba(0,0,0,.2)}
.ch-art{border-radius:18px;overflow:hidden;box-shadow:0 16px 40px rgba(0,0,0,.3);
background:rgba(255,255,255,.08);min-height:200px;display:grid;place-items:center;font-size:84px;position:relative}
.ch-art img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
/* Layout 2 cột */
.course-wrap{max-width:var(--maxw);margin:0 auto;padding:34px 18px 40px;
display:grid;grid-template-columns:1fr 350px;gap:30px;align-items:start}
.course-main{min-width:0}
.course-block{background:var(--card);border:1px solid var(--line);border-radius:16px;
box-shadow:var(--shadow);padding:24px 26px;margin-bottom:22px}
.course-block h2{font-size:19px;font-weight:800;color:var(--green-d);margin-bottom:14px}
.outcomes{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.outcomes .o{display:flex;gap:10px;font-size:15px;color:#33423c}
.outcomes .o .ck{color:var(--green);font-weight:800;flex:none}
/* Curriculum — danh sách bài giảng (như academy) */
.lessonlist{list-style:none}
.lessonlist li{display:flex;align-items:center;gap:13px;padding:14px 14px;border:1px solid var(--line);
border-radius:12px;margin-bottom:10px;background:#fbfdfc}
.lessonlist li:hover{background:var(--green-l)}
.lessonlist .ic{width:42px;height:42px;border-radius:11px;display:grid;place-items:center;font-size:18px;flex:none}
.ic.txt{background:#e7f0ec;color:#1b6e4f}.ic.vid{background:#fdeaea;color:#c0392b}
.ic.pdf{background:var(--gold-l);color:#8a661f}.ic.quiz{background:#e7f0ec;color:#1b6e4f}
.ic.live{background:#e3ecf7;color:#2f5f8f}
.lessonlist .l-main{flex:1;min-width:0}
.lessonlist .l-main b{font-size:14.5px;font-weight:600;display:block}
.lessonlist .l-main small{color:var(--muted);font-size:12.5px}
.lessonlist .l-num{color:var(--muted);font-weight:700;font-size:13px;width:22px;text-align:center;flex:none}
.lessonlist a{color:var(--green-d);font-weight:600}
.lessonlist a:hover{color:var(--green);text-decoration:underline}
.lessonlist .l-go{color:var(--green);font-weight:800;flex:none}
.lessonlist li.soon{opacity:.6;font-style:italic}
/* Mô tả chi tiết khoá (tái dùng .post bên trong) */
.course-detail .post{max-width:none;margin:0;padding:0}
.course-detail .post h3{font-size:18px;margin:20px 0 9px}
.course-detail .post p,.course-detail .post li{font-size:15.5px}
/* Thẻ đăng ký (sticky) — cho chính cột