/* Bedding Sourcing — brand guideline v1.0.
   Monochrome ink/paper, một accent cobalt chỉ cho phần tử tương tác. */
:root{
  color-scheme:light;
  --brand-black:#121212; --brand-white:#ffffff;
  --surface:#ffffff; --surface-alt:#f4f5f7; --line:#e3e5ea;
  --ink:#121212; --ink-muted:#5b606b;
  --cobalt:#2b50e0; --cobalt-hover:#1e3fc0; --cobalt-soft:#e8edff; --on-cobalt:#ffffff;
  --danger:#b42318;
  --font-display:Montserrat,"Be Vietnam Pro",system-ui,sans-serif;
  --font-sans:"Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",sans-serif;
  --radius-sm:4px; --radius-md:8px;
  --space-4:16px; --space-6:24px; --space-8:32px;
  --container-max:1200px; --pad:clamp(16px,4vw,32px);
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    color-scheme:dark;
    --surface:#121212; --surface-alt:#1c1d20; --line:#2e3036;
    --ink:#f5f5f3; --ink-muted:#a3a8b3;
    --cobalt:#6c8cff; --cobalt-hover:#8ea7ff; --cobalt-soft:#1a2350; --on-cobalt:#121212;
    --danger:#f97066;
  }
}
:root[data-theme="dark"]{
  color-scheme:dark;
  --surface:#121212; --surface-alt:#1c1d20; --line:#2e3036;
  --ink:#f5f5f3; --ink-muted:#a3a8b3;
  --cobalt:#6c8cff; --cobalt-hover:#8ea7ff; --cobalt-soft:#1a2350; --on-cobalt:#121212;
  --danger:#f97066;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{background:var(--surface);color:var(--ink);font-family:var(--font-sans);font-size:16px;line-height:26px;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
.wrap{max-width:var(--container-max);margin:0 auto;padding-inline:var(--pad)}
h1,h2,h3,h4{font-family:var(--font-display);text-wrap:balance;letter-spacing:-.01em}
:focus-visible{outline:2px solid var(--cobalt);outline-offset:2px}
.eyebrow{font-family:var(--font-display);font-size:12px;line-height:16px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-muted)}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

.logo{display:flex;align-items:center;color:var(--ink)}
.logo svg{height:32px;width:auto}
@media (max-width:1060px){.logo svg{height:24px}}
.on-dark{color:var(--brand-white)}
.on-dark .logo{color:var(--brand-white)}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;border-radius:var(--radius-sm);font-weight:600;font-size:16px;line-height:26px;transition:background .18s,color .18s,border-color .18s;white-space:nowrap}
.btn-primary{background:var(--cobalt);color:var(--on-cobalt)}
.btn-primary:hover{background:var(--cobalt-hover)}
.btn-primary[disabled]{opacity:.55;cursor:default}
.btn-secondary{border:1.5px solid var(--ink);color:var(--ink)}
.btn-secondary:hover{background:var(--ink);color:var(--surface)}
.on-dark .btn-secondary{border-color:rgba(255,255,255,.6);color:var(--brand-white)}
.on-dark .btn-secondary:hover{background:var(--brand-white);color:var(--brand-black)}

.topbar{background:var(--brand-black);color:#c7c9ce;font-size:14px;line-height:20px}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;gap:16px;min-height:40px}
.tb-left{display:flex;gap:24px;align-items:center;min-width:0}
.tb-left span{display:inline-flex;gap:8px;align-items:center;white-space:nowrap}
.topbar a:hover{color:#fff}
.lang{display:flex;gap:2px}
.lang button{font-size:12px;font-weight:600;letter-spacing:.06em;padding:4px 10px;border-radius:var(--radius-sm);color:#9a9ca2}
.lang button[aria-pressed="true"]{background:var(--brand-white);color:var(--brand-black)}
@media (max-width:620px){.tb-addr{display:none}}

.nav{position:sticky;top:0;z-index:40;background:var(--surface);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px}
.menu{display:flex;gap:4px}
.menu a{font-size:15px;font-weight:600;color:var(--ink-muted);padding:8px 14px;border-radius:var(--radius-sm)}
.menu a:hover,.menu a[aria-current="page"]{color:var(--ink);background:var(--surface-alt)}
.nav .btn{padding:9px 18px;font-size:15px}
.burger{display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:var(--radius-sm);align-items:center;justify-content:center}
@media (max-width:1060px){
  .nav .wrap{height:56px}
  .menu{position:absolute;top:100%;left:0;right:0;flex-direction:column;background:var(--surface);border-bottom:1px solid var(--line);padding:4px var(--pad) 12px;display:none}
  .menu.open{display:flex}
  .menu a{padding:12px 2px;border-bottom:1px solid var(--line);border-radius:0}
  .nav>.wrap>.btn{display:none}
  .burger{display:inline-flex}
}

section{scroll-margin-top:72px}
.sec{padding-block:clamp(48px,8vw,96px)}
.sec-head{max-width:70ch;margin-bottom:clamp(28px,4vw,48px)}
.sec-head h2{font-size:clamp(26px,3.6vw,32px);line-height:1.25;font-weight:700;margin-top:12px}
.sec-head p{color:var(--ink-muted);margin-top:12px}
.alt{background:var(--surface-alt)}

footer{background:var(--brand-black);color:#9a9ca2;font-size:14px;line-height:22px;padding-block:clamp(40px,6vw,64px) calc(20px + env(safe-area-inset-bottom,0px))}
.foot{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:var(--space-8)}
.foot h5{font-family:var(--font-display);font-size:12px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--brand-white);margin-bottom:14px}
.foot ul{list-style:none;display:grid;gap:8px}
.foot a:hover{color:var(--brand-white)}
.foot .logo{margin-bottom:16px}
.foot-legal{margin-top:40px;padding-top:18px;border-top:1px solid #2a2a2a;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;color:#7c7e84}
@media (max-width:860px){.foot{grid-template-columns:1fr 1fr}}
@media (max-width:520px){.foot{grid-template-columns:1fr}}

@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important;animation:none!important}}