/* ===================================================================
 * Cẩm nang Ôbobun — style dùng chung cho trang blog + bài viết
 * Kế thừa Ôbobun Design System v1.0
 * =================================================================== */
@font-face{font-family:'Overlock';src:url('/fonts/Overlock-Regular.ttf') format('truetype');font-weight:400;font-display:swap}
@font-face{font-family:'Overlock';src:url('/fonts/Overlock-Bold.ttf') format('truetype');font-weight:700;font-display:swap}
@font-face{font-family:'Overlock';src:url('/fonts/Overlock-Black.ttf') format('truetype');font-weight:900;font-display:swap}
@font-face{font-family:'Linotte';src:url('/fonts/Linotte-Light.ttf') format('truetype');font-weight:300;font-display:swap}
@font-face{font-family:'Linotte';src:url('/fonts/Linotte-Regular.ttf') format('truetype');font-weight:400;font-display:swap}
@font-face{font-family:'Linotte';src:url('/fonts/Linotte-Bold.ttf') format('truetype');font-weight:700;font-display:swap}
@font-face{font-family:'MyriadPro';src:url('/fonts/MyriadPro-Regular.otf') format('opentype');font-weight:400;font-display:swap}

:root{
  --vert:#578223;--vert-deep:#1F3A1E;--cream:#EDE2CC;--cream-soft:#F6EFDF;
  --clay:#B84C2B;--amber:#D4A762;--lichen:#87A645;--poivre:#3D3F3A;
  --nuit:#0D0F0C;--grey:#B8B5AC;--grey-light:#E8E4D9;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased}
body{font-family:'Linotte','Trebuchet MS',sans-serif;font-size:18px;line-height:1.65;color:var(--nuit);background:var(--cream)}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.wrap{max-width:1180px;margin:0 auto;padding:0 32px}
.kicker{font-family:'MyriadPro',sans-serif;font-size:12px;letter-spacing:.22em;text-transform:uppercase;color:var(--vert);font-weight:400}
@media(max-width:640px){.wrap{padding:0 22px}}

/* TOP BAR */
.topbar{position:sticky;top:0;z-index:50;padding:16px 0;border-bottom:1px solid var(--grey-light);
  background:rgba(246,239,223,.92);backdrop-filter:saturate(180%) blur(8px)}
.topbar-inner{display:flex;justify-content:space-between;align-items:center;max-width:1180px;margin:0 auto;padding:0 32px}
.brand-logo img{height:36px;width:auto}
.tb-nav{display:flex;gap:26px;align-items:center}
.tb-nav a{font-family:'MyriadPro',sans-serif;font-size:12px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--poivre);padding-bottom:4px;border-bottom:1.5px solid transparent;transition:.2s}
.tb-nav a:hover,.tb-nav a.active{color:var(--vert);border-bottom-color:var(--vert)}
.tb-cta{background:var(--vert);color:#fff!important;padding:9px 18px;border-radius:8px;border:none!important;font-weight:700}
.tb-cta:hover{background:var(--vert-deep)}
@media(max-width:680px){.tb-nav a:not(.tb-cta){display:none}.brand-logo img{height:28px}}

/* ========== TRANG INDEX ========== */
.blog-hero{background:linear-gradient(160deg,var(--cream),var(--cream-soft));padding:72px 0 56px;text-align:center}
.blog-hero h1{font-family:'Overlock',serif;font-weight:900;font-size:clamp(34px,5vw,60px);color:var(--vert-deep);
  letter-spacing:-.025em;line-height:1.02;margin:16px auto 16px;max-width:18ch}
.blog-hero p{font-size:clamp(17px,2vw,20px);color:var(--poivre);max-width:54ch;margin:0 auto}

.filters{display:flex;flex-wrap:wrap;gap:9px;justify-content:center;padding:30px 0 8px}
.chip{background:#fff;border:1.5px solid var(--grey-light);border-radius:30px;padding:9px 17px;font-size:14px;
  color:var(--poivre);font-weight:700;transition:.15s}
.chip:hover{border-color:var(--vert)}
.chip.active{background:var(--vert);color:#fff;border-color:var(--vert)}

.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;padding:30px 0 80px}
@media(max-width:900px){.grid{grid-template-columns:1fr 1fr}}
@media(max-width:600px){.grid{grid-template-columns:1fr}}
.post-card{background:#fff;border-radius:16px;overflow:hidden;border:1px solid var(--grey-light);
  display:flex;flex-direction:column;transition:transform .2s,box-shadow .2s}
.post-card:hover{transform:translateY(-5px);box-shadow:0 18px 40px rgba(31,58,30,.12)}
.post-card .cat-strip{height:6px;background:var(--vert)}
.post-card .body{padding:24px 22px;display:flex;flex-direction:column;flex:1}
.cat-badge{display:inline-flex;align-items:center;gap:6px;align-self:flex-start;font-size:12px;font-weight:700;
  letter-spacing:.04em;text-transform:uppercase;background:var(--cream-soft);color:var(--vert);padding:5px 11px;border-radius:20px;margin-bottom:14px}
.post-card h2{font-family:'Overlock',serif;font-weight:700;font-size:21px;color:var(--vert-deep);line-height:1.18;margin-bottom:10px}
.post-card .excerpt{font-size:15.5px;color:var(--poivre);flex:1}
.post-card .meta{font-size:13px;color:var(--grey);margin-top:16px;display:flex;gap:10px;align-items:center}
.empty-blog{text-align:center;color:var(--poivre);padding:60px 20px;grid-column:1/-1}

/* ========== TRANG BÀI VIẾT ========== */
.article-head{background:linear-gradient(160deg,var(--cream),var(--cream-soft));padding:56px 0 44px}
.article-head .wrap{max-width:760px}
.article-head .cat-badge{margin-bottom:18px}
.article-head h1{font-family:'Overlock',serif;font-weight:900;font-size:clamp(30px,4.4vw,50px);color:var(--vert-deep);
  letter-spacing:-.02em;line-height:1.07;margin-bottom:18px}
.article-head .amenu{font-size:14px;color:var(--poivre);display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.article-head .back{color:var(--vert);font-weight:700}

.prose{max-width:760px;margin:0 auto;padding:48px 32px 24px}
.prose p{font-size:19px;line-height:1.8;color:var(--nuit);margin-bottom:22px}
.prose h2{font-family:'Overlock',serif;font-weight:900;font-size:28px;color:var(--vert-deep);margin:42px 0 16px;line-height:1.12}
.prose h3{font-family:'Overlock',serif;font-weight:700;font-size:21px;color:var(--vert);margin:30px 0 12px}
.prose ul,.prose ol{margin:0 0 22px 26px}
.prose li{font-size:19px;line-height:1.75;margin-bottom:9px}
.prose strong{font-weight:700;color:var(--vert-deep)}
.prose blockquote{border-left:4px solid var(--clay);background:var(--cream-soft);padding:16px 22px;border-radius:8px;
  margin:0 0 24px;font-size:18px;color:var(--poivre)}
.prose table{width:100%;border-collapse:collapse;margin:0 0 26px;font-size:16px;background:#fff;border-radius:10px;overflow:hidden;
  box-shadow:0 6px 20px rgba(31,58,30,.07)}
.prose th,.prose td{text-align:left;padding:12px 15px;border-bottom:1px solid var(--grey-light)}
.prose th{background:var(--vert-deep);color:var(--cream);font-family:'MyriadPro',sans-serif;font-size:13px;letter-spacing:.04em;text-transform:uppercase}
@media(max-width:640px){.prose{padding:34px 22px 18px}.prose p,.prose li{font-size:17px}}

.disclaimer{max-width:760px;margin:14px auto;padding:0 32px}
.disclaimer .box{background:#faf3e6;border:1px solid var(--amber);border-radius:12px;padding:16px 20px;font-size:15px;color:var(--poivre)}
.disclaimer .box strong{color:var(--clay)}

.cta-box{max-width:760px;margin:36px auto;padding:0 32px}
.cta-box .inner{background:var(--vert-deep);color:var(--cream);border-radius:18px;padding:34px 34px;text-align:center}
.cta-box h3{font-family:'Overlock',serif;font-weight:900;font-size:25px;color:#fff;margin-bottom:12px}
.cta-box p{font-size:17px;opacity:.9;margin-bottom:22px}
.cta-box a{display:inline-block;background:var(--amber);color:var(--nuit);font-weight:700;padding:14px 30px;border-radius:10px;
  font-family:'MyriadPro',sans-serif;letter-spacing:.04em;transition:.2s}
.cta-box a:hover{filter:brightness(1.06);transform:translateY(-2px)}

.author{max-width:760px;margin:30px auto;padding:0 32px}
.author .inner{display:flex;align-items:center;gap:16px;border-top:1px solid var(--grey-light);padding-top:24px}
.author .av{width:54px;height:54px;border-radius:50%;background:var(--vert);color:#fff;display:flex;align-items:center;
  justify-content:center;font-family:'Overlock',serif;font-weight:900;font-size:22px;flex-shrink:0}
.author .nm{font-weight:700;color:var(--vert-deep);font-size:17px}
.author .ti{font-size:14px;color:var(--poivre)}

/* FOOTER */
footer{background:var(--nuit);color:var(--cream);padding:46px 0 36px;text-align:center;margin-top:30px}
footer .flogo img{height:32px;margin:0 auto 16px;opacity:.92}
footer p{font-size:14px;opacity:.7;margin:5px 0}
footer a.fl{color:var(--amber)}