/* =========================================================
   BẾP SINH — header.css
   Top bar, main header, primary nav, mega menu, mobile nav
   ========================================================= */

.topbar{
  background:var(--bs-green-900);
  color:#CDE7DA;
  font-size:12.5px;
}
.topbar .container{
  display:flex; align-items:center; justify-content:space-between;
  height:34px;
}
.topbar-left{display:flex; gap:20px;}
.topbar-left span{display:inline-flex; align-items:center; gap:6px;}
.topbar-right{display:flex; gap:18px; align-items:center;}
.topbar-right a:hover{color:#fff;}
.topbar-lang{display:flex; align-items:center; gap:5px; font-weight:600;}

.site-header{
  position:sticky; top:0; z-index:900;
  background:#fff;
  border-bottom:1px solid var(--bs-gray-200);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:var(--header-h);
  gap:28px;
}

.primary-nav{display:flex; align-items:center; gap:2px;}
.primary-nav > li{position:relative;}
.primary-nav > li > a,
.primary-nav > li > button{
  display:flex; align-items:center; gap:5px;
  padding:12px 14px;
  font-family:var(--font-display);
  font-weight:600;
  font-size:13.5px;
  color:var(--bs-ink);
  background:none; border:none;
  border-bottom:2px solid transparent;
  transition:color .2s, border-color .2s;
}
.primary-nav > li > a:hover,
.primary-nav > li.is-open > button{
  color:var(--bs-green-700);
  border-bottom-color:var(--bs-green-700);
}
.primary-nav .caret{
  width:8px; height:8px;
  border-right:1.5px solid currentColor;
  border-bottom:1.5px solid currentColor;
  transform:rotate(45deg);
  transition:transform .2s;
  margin-top:-3px;
}
.primary-nav li.is-open .caret{transform:rotate(-135deg); margin-top:3px;}

.brand-logo{
  display:flex; flex-direction:column; align-items:flex-start; order:-1;
  line-height:1;
  white-space:nowrap;
}
.brand-logo .mark{
  font-family:var(--font-display);
  font-weight:800;
  font-size:22px;
  color:var(--bs-green-900);
  letter-spacing:0.01em;
}
.brand-logo .mark span{color:var(--bs-green-600);}
.brand-logo .sub{
  font-size:9px;
  letter-spacing:.18em;
  color:var(--bs-blue-700);
  font-weight:700;
  margin-top:2px;
}

.header-actions{display:flex; align-items:center; gap:4px;}
.icon-btn{
  display:flex; align-items:center; justify-content:center;
  width:38px; height:38px;
  border:none; background:none; border-radius:50%;
  color:var(--bs-ink);
  transition:background .2s;
}
.icon-btn:hover{background:var(--bs-gray-50); color:var(--bs-green-700);}
.icon-btn svg{width:19px; height:19px;}
.header-actions .divider{width:1px; height:22px; background:var(--bs-gray-200); margin:0 6px;}
.hamburger{display:none;}

/* ---- Search overlay ---- */
.search-overlay{
  position:fixed; inset:0; z-index:1200;
  background:rgba(11,58,43,0.55);
  display:flex; align-items:flex-start; justify-content:center;
  padding-top:120px;
  opacity:0; pointer-events:none;
  transition:opacity .2s var(--ease);
}
.search-overlay.open{opacity:1; pointer-events:auto;}
.search-box{
  background:#fff; width:min(640px,90vw);
  border-radius:6px; padding:22px;
  box-shadow:0 24px 60px rgba(0,0,0,.3);
}
.search-box form{display:flex; gap:10px; border-bottom:2px solid var(--bs-green-700); padding-bottom:10px;}
.search-box input{flex:1; border:none; outline:none; font-size:18px; font-family:var(--font-display);}
.search-box .close-search{border:none; background:none; font-size:22px; color:var(--bs-gray-600);}
.search-suggest{margin-top:16px; font-size:13px; color:var(--bs-gray-600);}
.search-suggest a{display:inline-block; margin:6px 8px 0 0; padding:6px 12px; background:var(--bs-gray-50); border-radius:20px; color:var(--bs-ink);}
.search-suggest a:hover{background:var(--bs-green-100); color:var(--bs-green-700);}

/* ---- Mega Menu ---- */
.mega-menu{
  position:absolute; top:100%; left:50%;
  transform:translate(-50%,8px);
  width:940px; max-width:92vw;
  background:#fff;
  border:1px solid var(--bs-gray-200);
  border-top:3px solid var(--bs-green-700);
  box-shadow:0 20px 48px rgba(11,58,43,0.16);
  padding:30px;
  display:none;
  opacity:0;
  transition:opacity .18s var(--ease);
  z-index:120;
}
li.is-open .mega-menu{display:block; opacity:1;}
.mega-grid{
  display:grid;
  grid-template-columns:1fr 1fr 1fr 1.2fr;
  gap:28px;
}
.mega-col h4{
  font-size:11.5px; letter-spacing:.08em; text-transform:uppercase;
  color:var(--bs-green-700); margin-bottom:14px;
  border-bottom:1px solid var(--bs-gray-200); padding-bottom:8px;
}
.mega-col li a{
  display:block; padding:7px 0; font-size:13.5px; color:var(--bs-ink-soft);
  transition:color .15s, padding-left .15s;
}
.mega-col li a:hover{color:var(--bs-green-700); padding-left:4px;}
.mega-featured{display:flex; flex-direction:column; gap:12px;}
.mega-feat-item{
  display:flex; gap:12px; align-items:center;
  background:var(--bs-off-white);
  padding:8px; border-radius:4px;
}
.mega-feat-item img{width:56px; height:56px; object-fit:cover; border-radius:3px; background:var(--bs-gray-200);}
.mega-feat-item .name{font-size:12.5px; font-weight:600; color:var(--bs-ink); line-height:1.3;}
.mega-feat-item .price{font-size:12px; color:var(--bs-green-700); font-weight:700; margin-top:2px;}
.mega-cta{
  display:block; margin-top:6px; text-align:center;
  background:var(--bs-green-900); color:#fff; padding:10px; border-radius:3px;
  font-size:12.5px; font-weight:700; text-transform:uppercase; letter-spacing:.04em;
}
.mega-cta:hover{background:var(--bs-green-700);}

/* ---- Simple dropdown (non-mega) ---- */
.dropdown{
  position:absolute; top:100%; left:0;
  transform:translateY(8px);
  min-width:220px; background:#fff;
  border:1px solid var(--bs-gray-200); border-top:3px solid var(--bs-green-700);
  box-shadow:0 20px 48px rgba(11,58,43,0.16);
  padding:10px; display:none; z-index:120;
}
li.is-open .dropdown{display:block;}
.dropdown a{display:block; padding:9px 12px; font-size:13.5px; border-radius:3px; color:var(--bs-ink-soft);}
.dropdown a:hover{background:var(--bs-green-100); color:var(--bs-green-700);}

/* =========================================================
   Mobile navigation
   ========================================================= */
@media (max-width:1024px){
  .primary-nav{display:none;}
  .topbar-left span:nth-child(2){display:none;}
  .hamburger{
    display:flex; align-items:center; justify-content:center;
    width:38px; height:38px; border:none; background:none;
    flex-direction:column; gap:4px;
  }
  .hamburger span{width:20px; height:2px; background:var(--bs-ink); display:block;}

  .mobile-nav{
    position:fixed; top:0; right:0; bottom:0; width:min(360px,86vw);
    z-index:1300; background:#fff; transform:translateX(100%);
    transition:transform .28s var(--ease);
    overflow-y:auto; box-shadow:-18px 0 38px rgba(0,0,0,.22);
    border-left:1px solid rgba(17, 82, 56, 0.08);
  }
  .mobile-nav.open{transform:translateX(0);}
  .mobile-nav-head{
    display:flex; align-items:center; justify-content:space-between;
    padding:22px 20px; background:var(--bs-green-900); color:#fff;
    box-shadow:0 5px 18px rgba(11,58,43,.18);
  }
  .mobile-nav-head .mark{
    font-size:18px; letter-spacing:.08em; text-transform:uppercase;
  }
  .mobile-nav-head button{background:none; border:none; color:#fff; font-size:24px; line-height:1;}
  .mobile-nav ul{padding:14px 8px 22px;}
  .mobile-nav > ul > li{border-bottom:1px solid var(--bs-gray-200);}
  .mobile-nav > ul > li:last-child{border-bottom:none;}
  .mobile-nav a, .mobile-nav .m-toggle{
    display:flex; align-items:center; justify-content:space-between;
    width:100%; padding:16px 16px; font-family:var(--font-display); font-weight:700;
    font-size:14.2px; color:var(--bs-ink); background:none; border:none; text-align:left;
    transition:background .2s, color .2s;
    min-height:54px;
  }
  .mobile-nav a:hover, .mobile-nav .m-toggle:hover{background:var(--bs-gray-50); color:var(--bs-green-700);}
  .mobile-nav .m-toggle{
    border-radius:14px; background:var(--bs-gray-50);
  }
  .mobile-nav .sub{
    display:none; padding:10px 14px 16px;
    background:#F8FBF7; border-radius:14px;
    margin:0 12px 12px;
  }
  .mobile-nav li.open > .sub{display:block;}
  .mobile-nav .sub a{
    display:block; font-weight:500; font-size:14px; padding:12px 14px;
    color:var(--bs-ink-soft); border-radius:12px;
    margin-bottom:10px;
    transition:background .2s, color .2s;
  }
  .mobile-nav .sub a:hover{background:#fff; color:var(--bs-green-700);}
  .mobile-nav .sub a:last-child{margin-bottom:0;}
  .mobile-nav .caret{
    width:10px; height:10px;
    border-right:2px solid currentColor;
    border-bottom:2px solid currentColor;
    transform:rotate(45deg);
    margin-top:-2px;
  }
  .mobile-nav li.open > .m-toggle .caret{transform:rotate(-135deg);}
  .mobile-overlay{
    position:fixed; inset:0; z-index:1250; background:rgba(0,0,0,.45);
    opacity:0; pointer-events:none; transition:opacity .28s;
  }
  .mobile-overlay.open{opacity:1; pointer-events:auto;}
}