/* =====================================================================
   CASO Design Việt Nam — Brand stylesheet
   Định vị: kênh THÔNG TIN chuyên nghiệp cho khách lẻ & đại lý (không bán lẻ)
   Brand: đen/trắng tối giản, cao cấp, nhiều khoảng trắng, ảnh sản phẩm lớn
   ===================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;500;600;700;800&family=Inter:wght@300;400;500;600;700&display=swap');

:root{
  --black:#000000;
  --ink:#111111;
  --grey-900:#1a1a1a;
  --grey-700:#3a3a3a;
  --grey-600:#6b6b6b;
  --grey-400:#a0a0a0;
  --grey-300:#d7d7d7;
  --grey-200:#e8e8e8;
  --grey-100:#f5f5f5;
  --white:#ffffff;
  --line:#e6e6e6;

  --font-head:'Montserrat', 'Helvetica Neue', Arial, sans-serif;
  --font-body:'Inter', 'Helvetica Neue', Arial, sans-serif;

  --maxw:1240px;
  --gap:24px;
  --radius:2px;
  --ease:cubic-bezier(.2,.7,.2,1);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-body);
  color:var(--ink);
  background:var(--white);
  line-height:1.6;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease)}
h1,h2,h3,h4,h5{font-family:var(--font-head);font-weight:700;line-height:1.12;letter-spacing:-.01em;color:var(--ink)}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.section{padding:88px 0}
.section--tight{padding:56px 0}
.bg-black{background:var(--black);color:var(--white)}
.bg-grey{background:var(--grey-100)}
.text-center{text-align:center}

/* ---------- Eyebrow / headings ---------- */
.eyebrow{
  font-family:var(--font-head);
  font-size:12px;font-weight:600;letter-spacing:.22em;text-transform:uppercase;
  color:var(--grey-600);margin-bottom:16px;display:inline-block;
}
.bg-black .eyebrow{color:var(--grey-400)}
.section-title{font-size:38px;font-weight:700;letter-spacing:-.02em}
.section-sub{color:var(--grey-600);font-size:17px;max-width:640px;margin-top:16px}
.bg-black .section-sub{color:var(--grey-300)}
@media(max-width:720px){.section-title{font-size:28px}.section{padding:56px 0}}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-head);font-weight:600;font-size:13px;letter-spacing:.12em;text-transform:uppercase;
  padding:15px 30px;border:1px solid var(--ink);background:var(--ink);color:var(--white);
  cursor:pointer;transition:all .25s var(--ease);border-radius:var(--radius);
}
.btn:hover{background:transparent;color:var(--ink)}
.btn--ghost{background:transparent;color:var(--ink)}
.btn--ghost:hover{background:var(--ink);color:var(--white)}
.btn--light{background:var(--white);color:var(--ink);border-color:var(--white)}
.btn--light:hover{background:transparent;color:var(--white)}
.btn--outline-light{background:transparent;color:var(--white);border-color:var(--white)}
.btn--outline-light:hover{background:var(--white);color:var(--ink)}
.btn .arw{font-size:15px}
.link-arrow{font-family:var(--font-head);font-weight:600;font-size:13px;letter-spacing:.1em;text-transform:uppercase;display:inline-flex;align-items:center;gap:8px;border-bottom:1px solid transparent;padding-bottom:2px}
.link-arrow:hover{border-color:currentColor}

/* =====================================================================
   HEADER
   ===================================================================== */
.topbar{background:var(--black);color:var(--grey-300);font-size:12.5px}
.topbar .container{display:flex;justify-content:space-between;align-items:center;height:40px}
.topbar a:hover{color:var(--white)}
.topbar .tb-left{display:flex;gap:22px;align-items:center}
.topbar .tb-right{display:flex;gap:20px;align-items:center}
.topbar .lang a{font-weight:600;letter-spacing:.05em}
.topbar .lang .on{color:var(--white)}
.topbar .dot{color:var(--grey-600)}
@media(max-width:900px){.topbar .tb-left .hide-sm{display:none}}

.site-header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:78px}
.brand{display:flex;align-items:center;gap:12px;font-family:var(--font-head);font-weight:800;letter-spacing:.02em}
.brand .logo{height:30px;width:auto}
.brand .brand-text{font-size:20px;line-height:1}
.brand .brand-text small{display:block;font-size:9px;font-weight:600;letter-spacing:.42em;color:var(--grey-600);margin-top:3px}
.main-nav{display:flex;gap:30px;align-items:center;height:100%}
.main-nav>li{position:relative;height:100%;display:flex;align-items:center}
.main-nav>li>a{
  font-family:var(--font-head);font-weight:600;font-size:13px;letter-spacing:.06em;text-transform:uppercase;
  color:var(--ink);display:flex;align-items:center;gap:6px;height:100%;
}
.main-nav>li>a:hover{color:var(--grey-600)}
.main-nav .caret{font-size:9px;color:var(--grey-400)}
.nav-actions{display:flex;align-items:center;gap:20px}
.nav-actions a{font-size:18px;color:var(--ink)}
.nav-actions .acc{font-family:var(--font-head);font-size:12px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;border:1px solid var(--ink);padding:9px 16px;border-radius:var(--radius)}
.nav-actions .acc:hover{background:var(--ink);color:#fff}

/* dropdown mega */
.dropdown{
  position:absolute;top:100%;left:50%;transform:translateX(-50%) translateY(8px);
  background:var(--white);border:1px solid var(--line);box-shadow:0 24px 60px rgba(0,0,0,.10);
  min-width:280px;padding:14px;opacity:0;visibility:hidden;transition:.22s var(--ease);
}
.main-nav>li:hover .dropdown{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.dropdown a{display:block;padding:10px 14px;font-size:14px;color:var(--grey-700);border-radius:var(--radius)}
.dropdown a:hover{background:var(--grey-100);color:var(--ink)}
.dropdown.mega{min-width:560px;display:grid;grid-template-columns:1fr 1fr;gap:2px}

.burger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:6px}
.burger span{width:24px;height:2px;background:var(--ink);display:block;transition:.2s}

/* mobile nav */
.mobile-nav{position:fixed;inset:0 0 0 auto;width:min(86vw,360px);background:#fff;z-index:120;transform:translateX(100%);transition:.3s var(--ease);padding:24px;overflow-y:auto;box-shadow:-20px 0 60px rgba(0,0,0,.15)}
.mobile-nav.open{transform:translateX(0)}
.mobile-nav .close{font-size:26px;background:none;border:0;cursor:pointer;margin-bottom:12px}
.mobile-nav a{display:block;padding:13px 4px;border-bottom:1px solid var(--line);font-family:var(--font-head);font-weight:600;font-size:14px;letter-spacing:.04em;text-transform:uppercase}
.mobile-nav .sub a{font-weight:400;text-transform:none;font-family:var(--font-body);color:var(--grey-600);padding:9px 14px;border:0}
.backdrop{position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:110;opacity:0;visibility:hidden;transition:.3s}
.backdrop.open{opacity:1;visibility:visible}
@media(max-width:1040px){
  .main-nav,.nav-actions .acc,.nav-actions .search{display:none}
  .burger{display:flex}
}

/* =====================================================================
   HERO
   ===================================================================== */
.hero{position:relative;min-height:76vh;display:flex;align-items:center;background:#0a0a0a;color:#fff;overflow:hidden}
.hero__bg{position:absolute;inset:0}
.hero__bg img{width:100%;height:100%;object-fit:cover;opacity:.62}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(0,0,0,.82) 0%,rgba(0,0,0,.45) 55%,rgba(0,0,0,.15) 100%)}
.hero .container{position:relative;z-index:2}
.hero h1{font-size:60px;font-weight:800;letter-spacing:-.03em;line-height:1.02;max-width:14ch}
.hero p{font-size:19px;color:var(--grey-300);max-width:52ch;margin:24px 0 34px}
.hero .actions{display:flex;gap:16px;flex-wrap:wrap}
@media(max-width:720px){.hero h1{font-size:38px}.hero p{font-size:16px}.hero{min-height:64vh}}

/* ---------- info strip (free shipping style bar of the brand) ---------- */
.usp{border-bottom:1px solid var(--line);background:#fff}
.usp .container{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.usp .item{display:flex;align-items:center;gap:12px;padding:20px 8px;justify-content:center;border-right:1px solid var(--line)}
.usp .item:last-child{border-right:0}
.usp .ic{font-size:20px}
.usp .t{font-family:var(--font-head);font-weight:600;font-size:13px;letter-spacing:.02em}
.usp .s{font-size:12px;color:var(--grey-600)}
@media(max-width:820px){.usp .container{grid-template-columns:1fr 1fr}.usp .item:nth-child(2){border-right:0}.usp .item{border-bottom:1px solid var(--line)}}

/* =====================================================================
   CATEGORY GRID
   ===================================================================== */
.cat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--gap)}
@media(max-width:980px){.cat-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:540px){.cat-grid{grid-template-columns:1fr}}
.cat-card{position:relative;display:block;overflow:hidden;background:var(--grey-100);aspect-ratio:3/4}
.cat-card img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease)}
.cat-card:hover img{transform:scale(1.05)}
.cat-card::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(0,0,0,0) 40%,rgba(0,0,0,.72) 100%)}
.cat-card .meta{position:absolute;left:0;right:0;bottom:0;z-index:2;padding:22px;color:#fff}
.cat-card .meta h3{color:#fff;font-size:18px;font-weight:600}
.cat-card .meta span{font-size:12px;color:var(--grey-300);letter-spacing:.04em}
.cat-card .meta .go{margin-top:8px;font-family:var(--font-head);font-size:12px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;opacity:0;transform:translateY(6px);transition:.25s}
.cat-card:hover .meta .go{opacity:1;transform:translateY(0)}

/* =====================================================================
   PRODUCT CARD (info only — no price/cart)
   ===================================================================== */
.prod-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--gap)}
@media(max-width:980px){.prod-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:540px){.prod-grid{grid-template-columns:1fr 1fr;gap:14px}}
.prod-card{border:1px solid var(--line);background:#fff;transition:.25s var(--ease);display:flex;flex-direction:column}
.prod-card:hover{box-shadow:0 16px 40px rgba(0,0,0,.08);transform:translateY(-3px)}
.prod-card .thumb{aspect-ratio:1/1;background:var(--grey-100);overflow:hidden;display:flex;align-items:center;justify-content:center}
.prod-card .thumb img{width:100%;height:100%;object-fit:cover;mix-blend-mode:multiply}
.prod-card .body{padding:18px 18px 22px}
.prod-card .cat{font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--grey-600);font-family:var(--font-head);font-weight:600}
.prod-card h3{font-size:15.5px;font-weight:600;margin:8px 0 12px;min-height:42px}
.prod-card .more{font-family:var(--font-head);font-size:12px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;display:inline-flex;gap:7px;align-items:center;border-bottom:1px solid var(--ink);padding-bottom:3px}
.tag{display:inline-block;font-family:var(--font-head);font-size:10px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;background:var(--ink);color:#fff;padding:5px 9px;margin-bottom:12px}

/* =====================================================================
   FEATURE / SPLIT
   ===================================================================== */
.split{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:64px}
.split.rev .txt{order:2}
@media(max-width:860px){.split{grid-template-columns:1fr;gap:32px}.split.rev .txt{order:0}}
.split .media img{width:100%;aspect-ratio:4/3;object-fit:cover}
.split .txt h2{font-size:32px;margin-bottom:18px}
.split .txt p{color:var(--grey-600);margin-bottom:14px}
.bg-black .split .txt p{color:var(--grey-300)}

/* ---------- service strip: registration / warranty / dealer ---------- */
.svc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap)}
@media(max-width:860px){.svc-grid{grid-template-columns:1fr}}
.svc-card{border:1px solid rgba(255,255,255,.16);padding:36px 30px;transition:.25s}
.bg-black .svc-card:hover{background:rgba(255,255,255,.05)}
.svc-card .ic{font-size:30px;margin-bottom:20px;display:block}
.svc-card h3{color:#fff;font-size:20px;margin-bottom:12px}
.svc-card p{color:var(--grey-300);font-size:14.5px;margin-bottom:20px}

/* =====================================================================
   PAGE HERO (inner pages)
   ===================================================================== */
.page-hero{background:var(--black);color:#fff;padding:74px 0 66px}
.page-hero .eyebrow{color:var(--grey-400)}
.page-hero h1{font-size:46px;font-weight:800;letter-spacing:-.02em}
.page-hero p{color:var(--grey-300);max-width:60ch;margin-top:16px;font-size:17px}
@media(max-width:720px){.page-hero h1{font-size:32px}}
.breadcrumb{font-size:12.5px;color:var(--grey-600);margin-bottom:14px;letter-spacing:.02em}
.breadcrumb a:hover{color:var(--ink)}
.page-hero .breadcrumb{color:var(--grey-500,#8a8a8a)}
.page-hero .breadcrumb a{color:var(--grey-400)}

/* =====================================================================
   FORMS
   ===================================================================== */
.form-card{background:#fff;border:1px solid var(--line);padding:40px}
.field{margin-bottom:20px}
.field label{display:block;font-family:var(--font-head);font-size:12px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--grey-700);margin-bottom:8px}
.field input,.field select,.field textarea{
  width:100%;padding:14px 16px;border:1px solid var(--grey-300);background:#fff;font-family:var(--font-body);font-size:15px;color:var(--ink);border-radius:var(--radius);transition:.2s
}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--ink)}
.field .hint{font-size:12px;color:var(--grey-600);margin-top:6px}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:20px}
@media(max-width:620px){.grid-2{grid-template-columns:1fr}}
.form-note{font-size:12.5px;color:var(--grey-600);margin-top:6px}

/* steps */
.steps{display:grid;gap:22px}
.step{display:flex;gap:18px;align-items:flex-start}
.step .n{flex:0 0 44px;height:44px;border-radius:50%;background:var(--ink);color:#fff;display:flex;align-items:center;justify-content:center;font-family:var(--font-head);font-weight:700;font-size:17px}
.step h4{font-size:16px;margin-bottom:4px}
.step p{color:var(--grey-600);font-size:14px}

/* checklist */
.check-list{list-style:none;display:grid;gap:14px}
.check-list li{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:var(--grey-700)}
.check-list li::before{content:"✓";color:var(--ink);font-weight:800;font-family:var(--font-head)}

/* info cards row */
.mini-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap)}
@media(max-width:860px){.mini-grid{grid-template-columns:1fr}}
.mini{border:1px solid var(--line);padding:30px 26px;background:#fff}
.mini .ic{font-size:26px;margin-bottom:16px;display:block}
.mini h3{font-size:17px;margin-bottom:10px}
.mini p{color:var(--grey-600);font-size:14px}

/* table */
.table{width:100%;border-collapse:collapse;font-size:14.5px}
.table th,.table td{text-align:left;padding:16px 18px;border-bottom:1px solid var(--line)}
.table th{font-family:var(--font-head);font-size:12px;letter-spacing:.06em;text-transform:uppercase;background:var(--ink);color:#fff}
.table tr:nth-child(even) td{background:var(--grey-100)}

/* dealer / store list */
.store{border:1px solid var(--line);padding:24px;background:#fff}
.store h4{font-size:16px;margin-bottom:8px}
.store p{font-size:14px;color:var(--grey-600);margin-bottom:4px}
.store .badge{display:inline-block;font-family:var(--font-head);font-size:10px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;border:1px solid var(--ink);padding:4px 8px;margin-bottom:12px}

/* =====================================================================
   FOOTER
   ===================================================================== */
.site-footer{background:var(--black);color:var(--grey-400);padding:70px 0 30px;font-size:14px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px}
@media(max-width:900px){.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.footer-grid{grid-template-columns:1fr}}
.site-footer h4{color:#fff;font-size:13px;letter-spacing:.1em;text-transform:uppercase;margin-bottom:20px;font-weight:600}
.site-footer a:hover{color:#fff}
.footer-links{list-style:none;display:grid;gap:11px}
.footer-brand .logo{height:26px;filter:invert(1);margin-bottom:18px}
.footer-brand p{font-size:13.5px;line-height:1.7;color:var(--grey-400)}
.office{margin-bottom:16px}
.office strong{color:#fff;display:block;font-size:13px;margin-bottom:4px;font-weight:600}
.office span{font-size:13px;line-height:1.55;display:block}
.socials{display:flex;gap:14px;margin-top:6px}
.socials a{width:38px;height:38px;border:1px solid rgba(255,255,255,.2);display:flex;align-items:center;justify-content:center;font-size:15px;border-radius:50%}
.socials a:hover{background:#fff;color:#000;border-color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:50px;padding-top:24px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:12.5px;color:var(--grey-600)}
.footer-bottom a:hover{color:#fff}

/* utilities */
.mt-0{margin-top:0}.mb-0{margin-bottom:0}
.stack-lg{display:grid;gap:28px}
.head-row{display:flex;justify-content:space-between;align-items:flex-end;gap:20px;margin-bottom:44px;flex-wrap:wrap}
.pill{display:inline-flex;align-items:center;gap:8px;background:var(--grey-100);border:1px solid var(--line);padding:8px 14px;font-size:12.5px;font-family:var(--font-head);font-weight:600;letter-spacing:.04em}
.notice{background:var(--grey-100);border-left:3px solid var(--ink);padding:18px 22px;font-size:14px;color:var(--grey-700)}
.reveal{opacity:0;transform:translateY(24px);transition:.7s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* =====================================================================
   WORDPRESS menu compatibility (wp_nav_menu output: ul.main-nav > li > ul.sub-menu)
   ===================================================================== */
.main-nav{list-style:none}
.main-nav li{list-style:none}
.main-nav .menu-item-has-children>a::after{content:"▾";font-size:9px;margin-left:6px;color:var(--grey-400)}
.main-nav ul.sub-menu{
  position:absolute;top:100%;left:0;list-style:none;
  background:var(--white);border:1px solid var(--line);box-shadow:0 24px 60px rgba(0,0,0,.10);
  min-width:250px;padding:10px;opacity:0;visibility:hidden;transform:translateY(8px);
  transition:.2s var(--ease);z-index:70;
}
.main-nav>li:hover>ul.sub-menu{opacity:1;visibility:visible;transform:translateY(0)}
.main-nav ul.sub-menu li{height:auto;width:100%}
.main-nav ul.sub-menu a{
  display:block;padding:10px 14px;height:auto;font-family:var(--font-body);
  font-size:14px;font-weight:500;letter-spacing:0;text-transform:none;color:var(--grey-700);border-radius:var(--radius);
}
.main-nav ul.sub-menu a:hover{background:var(--grey-100);color:var(--ink)}
.main-nav .current-menu-item>a,.main-nav .current_page_item>a{color:var(--grey-600)}
/* footer & mobile menus generated by WP */
.mobile-nav ul{list-style:none}
.footer-links li{list-style:none}
.wp-block-post-content,.entry-content{font-size:16px;color:var(--grey-700)}
.entry-content h2{font-size:26px;margin:28px 0 14px}
.entry-content h3{font-size:20px;margin:22px 0 12px}
.entry-content p{margin-bottom:16px}
.entry-content ul{margin:0 0 16px 20px}
.entry-content img{margin:18px 0}