/* ===== Tré Bà Năm — Đặc sản Đà Nẵng ===== */
:root{
  --red:#b3122b;        /* đỏ truyền thống miền Trung */
  --red-dark:#8a0d20;
  --gold:#e0a92e;       /* vàng OCOP */
  --gold-soft:#f4d58a;
  --cream:#fff8ef;      /* nền kem */
  --ink:#241a17;        /* chữ tối */
  --ink-soft:#5b4a44;
  --green:#2f7d4f;      /* lá ổi */
  --white:#ffffff;
  --radius:14px;
  --shadow:0 8px 30px rgba(40,20,15,.10);
  --maxw:1140px;
  --font:"Be Vietnam Pro","Inter","Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--ink);background:var(--cream);line-height:1.7;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:var(--red);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}
h1,h2,h3,h4{line-height:1.25;color:var(--red-dark);font-weight:800}
h1{font-size:clamp(28px,5vw,46px)}
h2{font-size:clamp(24px,3.6vw,34px);margin-bottom:14px}
h3{font-size:20px;margin-bottom:8px}
p{margin-bottom:12px}
.text-gold{color:var(--gold)}
.lead{font-size:clamp(16px,2vw,19px);color:var(--ink-soft)}

/* ===== Header ===== */
header.site{position:sticky;top:0;z-index:50;background:rgba(255,248,239,.92);backdrop-filter:blur(8px);border-bottom:1px solid #f0e2cf}
.nav{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:12px;font-weight:800;color:var(--red-dark);font-size:20px}
.brand .logo{width:42px;height:42px;border-radius:50%;background:var(--red);color:#fff;display:grid;place-items:center;font-size:18px;font-weight:800;border:2px solid var(--gold);flex:none}
.menu{display:flex;gap:26px;list-style:none;align-items:center}
.menu a{color:var(--ink);font-weight:600;font-size:15px}
.menu a:hover{color:var(--red);text-decoration:none}
.btn{display:inline-block;background:var(--red);color:#fff;padding:11px 22px;border-radius:999px;font-weight:700;border:none;cursor:pointer;font-size:15px;transition:.2s;box-shadow:0 4px 14px rgba(179,18,43,.3)}
.btn:hover{background:var(--red-dark);text-decoration:none;transform:translateY(-1px)}
.btn-gold{background:var(--gold);color:var(--ink)}
.btn-gold:hover{background:#cf9515}
.btn-outline{background:transparent;color:var(--red);border:2px solid var(--red)}
.btn-outline:hover{background:var(--red);color:#fff}
.burger{display:none;background:none;border:none;font-size:26px;cursor:pointer;color:var(--red)}

/* ===== Hero ===== */
.hero{position:relative;background:linear-gradient(135deg,#8a0d20,#b3122b 60%,#c8283c);color:#fff;overflow:hidden}
.hero::after{content:"";position:absolute;inset:0;background:radial-gradient(circle at 80% 20%,rgba(224,169,46,.35),transparent 45%)}
.hero .container{position:relative;z-index:2;display:grid;grid-template-columns:1.05fr .95fr;gap:30px;align-items:center;padding:60px 20px}
.hero h1{color:#fff}
.hero h1 .hl{color:var(--gold-soft)}
.hero p.lead{color:#ffe9d6}
.hero .badges{display:flex;gap:10px;flex-wrap:wrap;margin:18px 0}
.badge{background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.3);padding:6px 14px;border-radius:999px;font-size:14px;font-weight:600}
.hero-img{position:relative}
.hero-img img{border-radius:var(--radius);box-shadow:var(--shadow);border:4px solid #fff;width:100%;height:auto;object-fit:contain;display:block;max-height:520px;margin:0 auto}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-top:8px}

/* ===== Sections ===== */
section{padding:64px 0}
.section-head{text-align:center;max-width:720px;margin:0 auto 40px}
.section-head p{color:var(--ink-soft)}

/* ===== Cards / Products ===== */
.grid{display:grid;gap:26px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.card{background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);border:1px solid #f1e6d6;transition:.2s;display:flex;flex-direction:column}
.card:hover{transform:translateY(-4px);box-shadow:0 14px 40px rgba(40,20,15,.16)}
.card img{aspect-ratio:1/1;object-fit:cover;width:100%}
.card-body{padding:20px}
.card-body h3{margin-bottom:6px}
.price{font-weight:800;color:var(--red);font-size:20px;margin:6px 0}
.tag{display:inline-block;background:var(--cream);color:var(--red-dark);font-size:13px;padding:3px 10px;border-radius:999px;margin:3px 4px 3px 0;border:1px solid #f0e2cf}

/* ===== Features ===== */
.features{background:#fff}
.feature{display:flex;gap:16px;align-items:flex-start}
.feature .ic{width:48px;height:48px;flex:none;border-radius:12px;background:var(--cream);color:var(--red);display:grid;place-items:center;font-size:24px;border:1px solid #f0e2cf}
.feature h3{font-size:17px}

/* ===== Steps ===== */
.steps{counter-reset:s}
.step{display:flex;gap:18px;margin-bottom:22px;align-items:flex-start}
.step .num{counter-increment:s;width:42px;height:42px;flex:none;border-radius:50%;background:var(--red);color:#fff;font-weight:800;display:grid;place-items:center}
.step .num::before{content:counter(s)}

/* ===== FAQ ===== */
.faq details{border:1px solid #f0e2cf;background:#fff;border-radius:12px;margin-bottom:12px;padding:4px 18px}
.faq summary{cursor:pointer;font-weight:700;padding:14px 0;color:var(--red-dark);list-style:none;display:flex;justify-content:space-between;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:22px;color:var(--red)}
.faq details[open] summary::after{content:"−"}
.faq p{padding:0 0 16px;color:var(--ink-soft)}

/* ===== Contact ===== */
.contact-wrap{display:grid;grid-template-columns:1fr 1fr;gap:30px}
.info-row{display:flex;gap:12px;margin-bottom:14px;align-items:flex-start}
.info-row .ic{color:var(--red);font-size:20px;flex:none;width:26px;text-align:center}
form .field{margin-bottom:16px}
form label{display:block;font-weight:600;margin-bottom:6px;font-size:14px}
form input,form textarea,form select{width:100%;padding:12px 14px;border:1px solid #e6d6c2;border-radius:10px;font-family:inherit;font-size:15px;background:#fff8ef}
form input:focus,form textarea:focus,form select:focus{outline:none;border-color:var(--red);box-shadow:0 0 0 3px rgba(179,18,43,.12)}
.note{font-size:13px;color:var(--ink-soft)}

/* ===== Footer ===== */
footer.site{background:var(--red-dark);color:#f7e2d8;padding:48px 0 24px}
footer .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:30px}
footer h4{color:#fff;margin-bottom:14px;font-size:16px}
footer a{color:#f7e2d8}
footer a:hover{color:var(--gold-soft)}
.foot-logo{display:flex;align-items:center;gap:12px;font-weight:800;color:#fff;font-size:20px;margin-bottom:12px}
.foot-logo .logo{width:40px;height:40px;border-radius:50%;background:var(--red);color:#fff;display:grid;place-items:center;border:2px solid var(--gold)}
.foot-bottom{border-top:1px solid rgba(255,255,255,.15);margin-top:30px;padding-top:16px;text-align:center;font-size:13px;color:#e9c9bd}

/* ===== Breadcrumb ===== */
.crumb{padding:16px 0;font-size:14px;color:var(--ink-soft)}
.crumb a{color:var(--ink-soft)}
.crumb span{color:var(--red);font-weight:600}

/* ===== Gallery ===== */
.gallery img{border-radius:12px;aspect-ratio:1/1;object-fit:cover;width:100%}

/* ===== Responsive ===== */
@media(max-width:860px){
  .hero .container{grid-template-columns:1fr;padding:44px 20px}
  .grid-3,.grid-2,.contact-wrap{grid-template-columns:1fr}
  .menu{position:fixed;inset:68px 0 auto 0;background:var(--cream);flex-direction:column;padding:20px;gap:8px;box-shadow:var(--shadow);transform:translateY(-120%);transition:.25s;border-bottom:1px solid #f0e2cf}
  .menu.open{transform:translateY(0)}
  .burger{display:block}
  footer .cols{grid-template-columns:1fr}
}