/* Minimal system font + blue accent */
:root{
  --accent:#2563eb;
  --bg:#f6f7fb;
  --text:#111;
  --muted:#6b7280;
  --border:#e5e7eb;
  --radius:14px;
}

*{ box-sizing:border-box; }

html,body{
  margin:0;
  padding:0;
  font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;
  color:var(--text);
  background:var(--bg);
}

a{ color:inherit; text-decoration:none; }
img{ display:block; max-width:100%; height:auto; border-radius:var(--radius); }

.container{ max-width:1000px; margin:0 auto; padding:20px; }

/* Header */
.site-header{
  background:#fff;
  border-bottom:1px solid var(--border);
  position:sticky; top:0; z-index:10;
}
.header-inner{ display:flex; align-items:center; justify-content:space-between; gap:16px; }
.logo{ font-weight:800; font-size:20px; letter-spacing:.3px; }
.nav{ display:flex; gap:10px; align-items:center; }
.nav-link{ padding:8px 10px; border-radius:10px; }
.nav-link:hover{ background:#f2f3f7; }
.nav-text{ color:var(--muted); font-size:14px; }

/* Banner */
.banner{ position:relative; margin-bottom:24px; }
.banner-img{
  width:100%; height:auto; max-height:380px; object-fit:cover; border-radius:var(--radius);
}
.banner-overlay{
  position:absolute; inset:0;
  display:flex; flex-direction:column; justify-content:center; align-items:center; text-align:center;
  background:rgba(0,0,0,.35); color:#fff; border-radius:var(--radius);
}
.banner-overlay h1{ font-size:2rem; margin:0 0 8px; }
.banner-overlay p{ margin:0 0 16px; }

/* Search */
.search-bar{ display:flex; gap:8px; flex-wrap:wrap; margin:12px 0 20px; }
.search-bar input,
.search-bar select{
  padding:10px 12px; border:1px solid var(--border); border-radius:10px; background:#fff;
}
.search-bar button{
  padding:10px 16px; border-radius:10px; border:none; background:var(--accent); color:#fff; font-weight:600;
}

/* Grid & Card */
.grid{ display:grid; grid-template-columns:repeat(auto-fill,minmax(220px,1fr)); gap:16px; }
.card{
  background:#fff; border:1px solid var(--border); border-radius:var(--radius);
  overflow:hidden; display:flex; flex-direction:column; transition:transform .1s;
}
.card:hover{ transform:translateY(-2px); }
.card-body{ padding:12px; }
.muted{ color:var(--muted); }
.small{ font-size:12px; }

/* Category block */
.cat-block{ margin:18px 0; }
.cat-head{ display:flex; align-items:center; justify-content:space-between; margin-bottom:8px; }
.cat-head h2{ margin:0; }

/* Product detail */
.product-detail{ display:grid; grid-template-columns:1.1fr .9fr; gap:24px; }
@media(max-width:800px){ .product-detail{ grid-template-columns:1fr; } }
.detail-info .price{ font-size:20px; font-weight:800; margin:8px 0; }
.add-cart-form{ display:flex; gap:8px; align-items:center; }
.add-cart-form input[type=number]{
  width:90px; padding:10px; border:1px solid var(--border); border-radius:10px;
}

/* Buttons */
.primary,
.add-cart-form button{
  padding:10px 16px; border-radius:10px; border:none; background:var(--accent); color:#fff; font-weight:700;
}
.secondary{
  padding:10px 16px; border-radius:10px; border:1px solid var(--border); background:#fff;
}
.link{
  background:transparent; border:none; color:var(--accent); cursor:pointer;
}
.link.danger{ color:#ef4444; }

/* Cart */
.cart-table{
  width:100%; border-collapse:collapse; background:#fff;
  border:1px solid var(--border); border-radius:var(--radius); overflow:hidden;
}
.cart-table th,.cart-table td{ padding:12px; border-bottom:1px solid var(--border); vertical-align:middle; }
.cart-item{ display:flex; gap:12px; align-items:center; }
.cart-item img{ width:70px; height:70px; object-fit:cover; border-radius:10px; }
.inline{ display:inline-flex; gap:8px; align-items:center; }
.cart-summary{ margin-top:16px; display:flex; align-items:center; justify-content:space-between; gap:16px; flex-wrap:wrap; }
.cart-summary .actions{ display:flex; gap:10px; align-items:center; }

/* Checkout */
.checkout-grid{ display:grid; grid-template-columns:1fr .8fr; gap:24px; }
@media(max-width:900px){ .checkout-grid{ grid-template-columns:1fr; } }
.checkout-form fieldset{
  background:#fff; border:1px solid var(--border); border-radius:var(--radius);
  padding:12px 12px 4px; margin-bottom:14px;
}
.checkout-form label{ display:grid; gap:6px; margin:8px 0; }
.checkout-form input,
.checkout-form textarea{
  padding:10px; border:1px solid var(--border); border-radius:10px; background:#fff;
}
.radio{ display:flex; gap:8px; align-items:center; margin:4px 0; }

.order-summary{
  background:#fff; border:1px solid var(--border); border-radius:var(--radius); padding:12px;
}
.order-summary ul{ list-style:none; padding:0; margin:0; }
.order-summary li{
  display:flex; justify-content:space-between; padding:6px 0; border-bottom:1px dashed var(--border);
}
.order-summary .summary-line,
.order-summary .summary-total{ display:flex; justify-content:space-between; padding-top:8px; }

/* Success */
.success-card{
  background:#fff; border:1px solid var(--border); border-radius:var(--radius);
  padding:14px; max-width:700px;
}
.success-row{ display:flex; gap:12px; justify-content:space-between; padding:6px 0; }
.divider{ height:1px; background:var(--border); margin:8px 0; }
.success-items{ list-style:none; padding:0; margin:0; }
.success-items li{ display:flex; justify-content:space-between; padding:6px 0; }
.success-total{ display:flex; justify-content:space-between; font-weight:800; font-size:18px; margin-top:6px; }

/* Auth */
.auth-wrapper{ display:flex; justify-content:center; align-items:flex-start; padding:40px 16px; }
.auth-card{
  width:100%; max-width:420px; background:#fff; border:1px solid var(--border);
  border-radius:var(--radius); padding:24px; box-shadow:0 2px 8px rgba(0,0,0,.04);
}
.auth-card h1{ margin:0 0 8px; font-size:1.5rem; }
.auth-card p.muted{ margin:0 0 16px; }
.auth-form{ max-width:420px; background:#fff; border:1px solid var(--border); border-radius:var(--radius); padding:12px; }
.auth-form.one-col{ display:grid; gap:14px; margin-top:12px; }
.auth-form.one-col label{ display:grid; gap:6px; }
.auth-form.one-col input{
  padding:12px; border:1px solid var(--border); border-radius:10px; font-size:15px;
}
.auth-form button.big{ padding:14px; font-size:16px; border-radius:10px; width:100%; }
.auth-card .small{ font-size:13px; text-align:center; margin-top:16px; }

/* Alerts */
.alert{ padding:10px; border-radius:10px; margin:10px 0; }
.alert.error{ background:#fee2e2; color:#991b1b; }
.alert.success{ background:#dcfce7; color:#166534; }

/* Footer */
.site-footer{ margin-top:36px; border-top:1px solid var(--border); padding:20px 0; background:#fff; }

/* Chatbot */
.chat-toggle{
  position:fixed; right:20px; bottom:20px;
  background:var(--accent); color:#fff; border:none; padding:12px 16px;
  border-radius:999px; font-weight:700; box-shadow:0 6px 20px rgba(0,0,0,.15); cursor:pointer;
}
.chat-widget{
  position:fixed; right:20px; bottom:80px; width:320px; max-height:62vh;
  background:#fff; border:1px solid var(--border); border-radius:var(--radius);
  display:none; flex-direction:column; overflow:hidden; box-shadow:0 8px 26px rgba(0,0,0,.15);
}
.chat-header{ display:flex; justify-content:space-between; align-items:center; padding:10px 12px; border-bottom:1px solid var(--border); background:#f9fafb; }
.chat-close{ border:none; background:transparent; font-size:18px; cursor:pointer; }
.chat-messages{ padding:10px; overflow:auto; flex:1; display:flex; flex-direction:column; gap:8px; }
.chat-form{ display:flex; border-top:1px solid var(--border); }
#chat-input{ flex:1; border:none; padding:12px; }
.chat-form button{ border:none; background:var(--accent); color:#fff; padding:0 14px; margin:6px; border-radius:10px; }
.msg{ padding:8px 10px; border-radius:10px; max-width:85%; }
.msg.user{ align-self:flex-end; background:#e0ecff; }
.msg.bot{ align-self:flex-start; background:#f3f4f6; }

/* Category strip */
.cat-strip{ background:#fff; border-bottom:1px solid var(--border); }
.cat-strip-inner{ display:flex; gap:8px; overflow:auto; padding:8px 0; }
.cat-chip{
  padding:6px 10px; border:1px solid var(--border); border-radius:999px; font-size:14px; white-space:nowrap;
}
.cat-chip:hover{ background:#f2f3f7; }

/* Home feature header */
.home-feature .head-row{ display:flex; align-items:center; justify-content:space-between; margin:12px 0; }
.home-feature h2{ margin:0; }

/* 4-up grid (search page) */
.grid-4{ display:grid; gap:16px; }
@media(min-width:960px){ .grid-4{ grid-template-columns:repeat(4,1fr); } }
@media(max-width:959.98px) and (min-width:640px){ .grid-4{ grid-template-columns:repeat(2,1fr); } }
@media(max-width:639.98px){ .grid-4{ grid-template-columns:1fr; } }

/* My Page - Orders */
.orders-stack{ display:grid; gap:16px; margin-top:8px; }
.order-card{ background:#fff; border:1px solid var(--border); border-radius:var(--radius); overflow:hidden; }
.order-head{
  display:flex; justify-content:space-between; gap:12px; padding:12px 14px; border-bottom:1px solid var(--border); align-items:center;
}
.order-code{ font-weight:800; }
.oh-meta{ display:flex; gap:8px; align-items:center; }
.chip{
  display:inline-block; padding:2px 8px; border:1px solid var(--border);
  border-radius:999px; font-size:12px; background:#f8fafc;
}
.order-total{ display:flex; gap:8px; align-items:baseline; }
.order-total span{ color:var(--muted); }
.order-body{ display:grid; grid-template-columns:minmax(0,1.2fr) .8fr; gap:18px; padding:14px; }
@media(max-width:900px){ .order-body{ grid-template-columns:1fr; } }
.mini-table{ width:100%; border-collapse:collapse; }
.mini-table th,.mini-table td{ padding:10px; border-bottom:1px solid var(--border); vertical-align:top; }
.mini-table th{ background:#f8fafc; text-align:left; font-size:13px; }
.t-right{ text-align:right; }
.kv{ list-style:none; margin:0; padding:0; display:grid; gap:8px; }
.kv li{ display:grid; grid-template-columns:110px 1fr; gap:8px; }
.kv li.addr span:last-child{ white-space:pre-wrap; }
.ob-right{ background:#fcfdff; border:1px solid var(--border); border-radius:var(--radius); padding:12px; }