/* --- BIẾN MÀU SẮC & FONT (VARIABLES) --- */
@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;500;700&display=swap');

:root {
  --primary-color: #8D6E63;
  --dark-color: #333333;
  --light-color: #FFFFFF;
  --bg-color: #f9f9f9;
  --border-color: #eeeeee;
  --shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 6px 20px rgba(0, 0, 0, 0.12);
}

/* --- THIẾT LẬP CHUNG & RESET --- */
* {
  box-sizing: border-box;
}

body {
  font-family: 'Montserrat', sans-serif;
  margin: 0;
  padding: 0;
  background-color: var(--bg-color);
  color: var(--dark-color);
  line-height: 1.6;
  text-align: center;
}

/* --- HEADER, NAV, FOOTER (Giữ nguyên) --- */
header { display: flex; justify-content: space-between; align-items: center; padding: 15px 40px; background-color: var(--light-color); box-shadow: var(--shadow); position: sticky; top: 0; z-index: 1000; }
.logo img { height: 50px; }
nav ul { list-style: none; display: flex; margin: 0; padding: 0; }
nav li { margin-left: 30px; }
nav a { text-decoration: none; color: var(--dark-color); font-weight: 500; position: relative; padding: 5px 0; transition: color 0.3s ease; }
nav a::after { content: ''; position: absolute; width: 0; height: 2px; bottom: 0; left: 0; background-color: var(--primary-color); transition: width 0.3s ease; }
nav a:hover { color: var(--primary-color); }
nav a:hover::after { width: 100%; }
footer { text-align: center; padding: 20px; background-color: var(--light-color); border-top: 1px solid var(--border-color); margin-top: 40px; }


/* --- BANNER (SWIPER) --- */
.swiper-container, .swiper {
  width: 100%;
  padding: 50px 0;
  margin-bottom: 3rem;
}

.swiper-slide {
  width: 75%; 
  max-width: 1216px;
  
  /* **THAY ĐỔI TỈ LỆ KHUNG ẢNH TẠI ĐÂY** */
  aspect-ratio: 21 / 9;
  
  border-radius: 15px;
  overflow: hidden;
  
  transform: scale(0.8);
  opacity: 0.5;
  
  transition: transform 0.5s ease, opacity 0.5s ease;
}

.swiper-slide-active {
  transform: scale(1);
  opacity: 1;
  box-shadow: 0 8px 30px rgba(0,0,0,0.15);
}

.swiper-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.swiper-button-next, .swiper-button-prev {
  color: white;
}


/* --- KHU VỰC ƯU ĐÃI (OFFERS) --- */
.offers {
  display: grid;
  grid-template-columns: repeat(auto-fit, 280px);
  justify-content: center;
  gap: 2rem;
  padding: 40px 20px;
  max-width: 1216px; 
  margin: 0 auto;
}

/* ... Các CSS còn lại cho .offer giữ nguyên ... */
.offer { text-align: center; background-color: var(--light-color); border-radius: 12px; box-shadow: var(--shadow); overflow: hidden; transition: transform 0.3s ease, box-shadow 0.3s ease; }
.offer:hover { transform: translateY(-8px); box-shadow: var(--shadow-hover); }
.offer img { width: 100%; height: auto; aspect-ratio: 1245 / 1900; object-fit: cover; display: block; }
.offer-content { padding: 20px; }
.offer h3 { margin-top: 0; margin-bottom: 10px; font-size: 1.1rem; }
.offer p { margin-bottom: 0; font-size: 0.9rem; color: #666; }

/* --- RESPONSIVE --- */
@media (max-width: 768px) {
  header {
    flex-direction: column;
    gap: 15px;
  }
  .swiper-slide {
    width: 90%;
  }
  .offers {
    /* Buộc layout chỉ có 1 cột */
    grid-template-columns: 1fr;
  }
}