/* ============================================================
   Thương hiệu cá nhân — Blog tĩnh (no build) | styles.css
   ============================================================ */
:root{
  --bg:#FBF8F3; --surface:#FFFFFF; --surface-2:#F3EBDE;
  --ink:#221E1B; --muted:#6B6259; --line:#E8E0D4;
  --accent:#B0463C; --accent-dark:#8E362E; --gold:#C9A24B;
  --maxw:1120px; --measure:42rem;
  --radius:16px; --shadow:0 14px 40px -18px rgba(60,40,30,.35);
  --serif:'Lora',Georgia,'Times New Roman',serif;
  --sans:'Be Vietnam Pro',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:var(--sans);font-size:18px;line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--accent-dark);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{font-family:var(--serif);line-height:1.2;font-weight:600;letter-spacing:-.01em}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(251,248,243,.85);
  backdrop-filter:saturate(140%) blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{display:flex;align-items:center;gap:12px;font-family:var(--serif);
  font-weight:600;font-size:1.15rem;color:var(--ink)}
.brand:hover{text-decoration:none}
.brand .mark{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;
  background:var(--accent);color:#fff;font-family:var(--serif);font-size:1.1rem}
.nav-links{display:flex;gap:28px;align-items:center;font-size:.97rem}
.nav-links a{color:var(--muted);font-weight:500}
.nav-links a:hover{color:var(--ink);text-decoration:none}
.nav-cta{background:var(--accent);color:#fff!important;padding:10px 18px;border-radius:999px;font-weight:600}
.nav-cta:hover{background:var(--accent-dark);text-decoration:none}

/* ---------- Buttons ---------- */
.btn{display:inline-block;padding:14px 26px;border-radius:999px;font-weight:600;
  font-size:1rem;cursor:pointer;border:2px solid transparent;transition:.18s}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-dark);text-decoration:none;transform:translateY(-1px)}
.btn-ghost{border-color:var(--ink);color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:#fff;text-decoration:none}

/* ---------- Hero ---------- */
.hero{padding:88px 0 64px;position:relative;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center}
.eyebrow{display:inline-block;font-size:.8rem;letter-spacing:.16em;text-transform:uppercase;
  font-weight:700;color:var(--accent);background:var(--surface-2);
  padding:7px 14px;border-radius:999px;margin-bottom:22px}
.hero h1{font-size:clamp(2.3rem,4.6vw,3.6rem);margin:0 0 20px}
.hero p.lead{font-size:1.2rem;color:var(--muted);max-width:34rem;margin:0 0 32px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:32px}
.hero-card .quote{font-family:var(--serif);font-size:1.3rem;font-style:italic;line-height:1.45;margin:0 0 18px}
.hero-card .sig{display:flex;align-items:center;gap:12px;color:var(--muted);font-size:.95rem}
.hero-card .sig .dot{width:42px;height:42px;border-radius:50%;background:var(--surface-2);
  display:grid;place-items:center;color:var(--accent);font-family:var(--serif);font-weight:700}
.hero-blob{position:absolute;right:-120px;top:-120px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle at 30% 30%,#F0D9B5,transparent 70%);opacity:.6;z-index:-1}

/* ---------- Sections ---------- */
.section{padding:64px 0}
.section-head{max-width:var(--measure);margin-bottom:40px}
.section-head .eyebrow{margin-bottom:14px}
.section-head h2{font-size:clamp(1.8rem,3vw,2.4rem);margin:0 0 12px}
.section-head p{color:var(--muted);margin:0}

/* ---------- Post grid ---------- */
.posts{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;display:flex;flex-direction:column;transition:.2s}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.card .thumb{height:150px;background:linear-gradient(135deg,var(--accent),var(--accent-dark));
  display:grid;place-items:center;color:#fff;font-family:var(--serif);font-size:2.6rem;opacity:.95}
.card .thumb.alt{background:linear-gradient(135deg,#C9A24B,#9c7a2e)}
.card .thumb.alt2{background:linear-gradient(135deg,#5C7A6B,#3f5a4d)}
.card .body{padding:24px;display:flex;flex-direction:column;gap:10px;flex:1}
.card .tag{font-size:.78rem;letter-spacing:.08em;text-transform:uppercase;color:var(--accent);font-weight:700}
.card h3{font-size:1.25rem;margin:0}
.card h3 a{color:var(--ink)}
.card p{color:var(--muted);font-size:.97rem;margin:0}
.card .more{margin-top:auto;font-weight:600;color:var(--accent-dark);font-size:.95rem}

/* ---------- CTA band ---------- */
.cta-band{background:linear-gradient(135deg,#2a2320,#3c302a);color:#F6EFE6;border-radius:24px;
  padding:56px;text-align:center;position:relative;overflow:hidden}
.cta-band h2{color:#fff;font-size:clamp(1.8rem,3vw,2.5rem);margin:0 0 14px}
.cta-band p{color:#D9CCBD;max-width:38rem;margin:0 auto 28px}
.cta-band .btn-primary{background:var(--gold);color:#2a2320}
.cta-band .btn-primary:hover{background:#d8b25e}

/* ---------- Newsletter ---------- */
.newsletter{display:flex;gap:12px;max-width:30rem;margin:22px auto 0;flex-wrap:wrap;justify-content:center}
.newsletter input{flex:1;min-width:200px;padding:14px 18px;border-radius:999px;border:1px solid var(--line);
  font-family:var(--sans);font-size:1rem}

/* ---------- Article ---------- */
.article{padding:56px 0 24px}
.article-head{max-width:var(--measure);margin:0 auto 36px;text-align:center}
.article-head .tag{color:var(--accent);font-weight:700;letter-spacing:.08em;text-transform:uppercase;font-size:.8rem}
.article-head h1{font-size:clamp(2rem,4vw,3rem);margin:14px 0 16px}
.article-head .meta{color:var(--muted);font-size:.95rem}
.prose{max-width:var(--measure);margin:0 auto;font-size:1.12rem}
.prose p{margin:0 0 1.3em}
.prose h2{font-size:1.7rem;margin:1.8em 0 .6em}
.prose h3{font-size:1.3rem;margin:1.5em 0 .5em}
.prose ul,.prose ol{margin:0 0 1.3em;padding-left:1.3em}
.prose li{margin:.4em 0}
.prose blockquote{margin:1.6em 0;padding:20px 26px;border-left:4px solid var(--accent);
  background:var(--surface-2);border-radius:0 12px 12px 0;font-family:var(--serif);font-style:italic;font-size:1.2rem}
.prose strong{color:var(--ink)}
.prose .lead{font-size:1.28rem;color:var(--muted);font-family:var(--serif)}
.callout{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px 28px;margin:1.8em 0;box-shadow:var(--shadow)}
.callout h4{margin:0 0 8px;color:var(--accent-dark)}

/* ---------- Footer ---------- */
.site-footer{margin-top:72px;border-top:1px solid var(--line);background:var(--surface-2)}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px;padding:56px 0 32px}
.footer-grid h4{font-family:var(--sans);font-size:.85rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin:0 0 14px}
.footer-grid a{display:block;color:var(--ink);margin-bottom:8px;font-size:.97rem}
.footer-bottom{border-top:1px solid var(--line);padding:20px 0;color:var(--muted);font-size:.88rem;
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}

/* ---------- Responsive ---------- */
@media(max-width:880px){
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .posts{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .nav-links a:not(.nav-cta){display:none}
}
@media(max-width:560px){
  body{font-size:17px}
  .posts{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .cta-band{padding:36px 24px}
  .hero{padding:56px 0 40px}
}