/* ============================================================
   NSM SKINLAB — Style dùng chung cho toàn site
   Thanh điều hướng + chân trang + biến màu và bộ chữ
   File này được nạp ở MỌI trang. Sửa 1 lần, đổi cả site.
   ============================================================ */

:root{
  --font-title:'Playfair Display',Georgia,'Times New Roman',serif;
  --font-body:'Be Vietnam Pro',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Arial,sans-serif;
  --gold:#B8860B; --gold-2:#D4AF37; --gold-3:#E8D9A0;
  --ink:#1F1810; --ink-2:#5A4B38; --cream:#FDFAF3; --cream-2:#F5EDDD;
  --line:rgba(184,134,11,.22); --radius:14px;
  --shadow:0 10px 40px rgba(120,90,20,.10); --max:1140px;
}

/* ===== THANH ĐIỀU HƯỚNG ===== */
.nav{
  position:sticky;top:0;z-index:100;
  background:rgba(253,250,243,.94);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.nav-in{
  max-width:var(--max);margin:0 auto;padding:0 20px;
  display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:66px;
}
.nav-logo{
  font-family:var(--font-title);font-size:21px;font-weight:700;letter-spacing:.2em;
  color:var(--gold);text-decoration:none;line-height:1;white-space:nowrap;
}
.nav-logo small{
  display:block;font-size:8.5px;letter-spacing:.36em;color:var(--ink-2);
  margin-top:3px;font-family:var(--font-body);font-weight:500;
}
.nav-links{display:flex;align-items:center;gap:4px;list-style:none;margin:0;padding:0}
.nav-links a{
  display:block;padding:9px 14px;border-radius:100px;text-decoration:none;
  font-size:14.5px;font-weight:500;color:var(--ink-2);transition:background .18s,color .18s;
}
.nav-links a:hover{background:rgba(184,134,11,.09);color:var(--ink)}
.nav-links a.on{color:var(--gold);font-weight:700;background:rgba(184,134,11,.11)}
.nav-cta{
  background:linear-gradient(135deg,var(--gold-2),var(--gold));color:#fff !important;
  font-weight:700 !important;padding:10px 22px !important;
  box-shadow:0 5px 16px rgba(184,134,11,.3);white-space:nowrap;
}
.nav-cta:hover{background:linear-gradient(135deg,var(--gold),var(--gold-2))}
.nav-toggle{
  display:none;background:none;border:1px solid var(--line);border-radius:9px;
  padding:8px 11px;cursor:pointer;font-size:17px;color:var(--gold);line-height:1;
}

@media(max-width:900px){
  .nav-toggle{display:block}
  .nav-links{
    display:none;position:absolute;top:100%;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:2px;
    background:var(--cream);border-bottom:1px solid var(--line);
    padding:12px 20px 18px;box-shadow:0 14px 30px rgba(120,90,20,.13);
  }
  .nav-links.open{display:flex}
  .nav-links a{padding:12px 14px;font-size:15.5px}
  .nav-cta{text-align:center;margin-top:6px}
}

/* ===== CHÂN TRANG ===== */
.ft{background:#15100C;color:#9A8A70;font-size:14px;line-height:1.85;margin-top:0}
.ft-in{max-width:var(--max);margin:0 auto;padding:52px 20px 30px}
.ft-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:38px}
.ft-logo{font-family:var(--font-title);font-size:23px;font-weight:700;letter-spacing:.2em;color:var(--gold-3)}
.ft-logo small{display:block;font-size:9px;letter-spacing:.36em;color:#7A6A52;margin-top:4px;font-family:var(--font-body)}
.ft-tag{
  display:inline-block;margin-top:14px;font-family:var(--font-title);font-size:12.5px;
  letter-spacing:.2em;text-transform:uppercase;color:var(--gold);
  border-top:1px solid rgba(184,134,11,.3);border-bottom:1px solid rgba(184,134,11,.3);padding:5px 15px;
}
.ft h4{
  font-family:var(--font-title);font-size:16px;font-weight:600;color:var(--gold-3);
  margin:0 0 12px;letter-spacing:.01em;
}
.ft ul{list-style:none;margin:0;padding:0}
.ft li{margin-bottom:8px}
.ft a{color:#9A8A70;text-decoration:none;transition:color .18s}
.ft a:hover{color:var(--gold-3)}
.ft-hot{color:var(--gold-3);font-weight:700;font-size:17px;text-decoration:none}
.ft-bot{
  border-top:1px solid rgba(184,134,11,.18);margin-top:34px;padding-top:22px;
  font-size:12.4px;color:#7A6A52;line-height:1.75;
}
.ft-bot .disc{max-width:80ch;margin-top:9px;font-size:11.8px;opacity:.9}
@media(max-width:760px){
  .ft-grid{grid-template-columns:1fr;gap:28px}
}

/* ===== NÚT GỌI NHANH (mobile) ===== */
.call-fab{
  position:fixed;right:16px;bottom:88px;z-index:99;display:none;
  width:54px;height:54px;border-radius:50%;
  background:linear-gradient(135deg,var(--gold-2),var(--gold));
  box-shadow:0 8px 24px rgba(184,134,11,.45);
  align-items:center;justify-content:center;font-size:24px;text-decoration:none;
}
@media(max-width:900px){.call-fab{display:flex}}