/* ===========================================
   🌟 STYLE CHUNG CHO TẤT TẦN TẬP
   Tone: trắng (#fff) + accent vàng (#fbc849),
         xanh ngọc (#52b5b5), cam (#f08146)
   Font: sans-serif
=========================================== */

/* ===== RESET & BASE ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Helvetica Neue', Arial, sans-serif;
  background-color: #ffffff;
  color: #222;
  line-height: 1.6;
}

/* ===== HEADER ===== */
.site-header {
  background-color: #fff;
  border-bottom: 2px solid #fbc849;
  padding: 15px 10%;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.site-header .header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.logo img {
  height: 60px;
}

.main-nav ul {
  list-style: none;
  display: flex;
  gap: 25px;
}

.main-nav a {
  text-decoration: none;
  color: #333;
  font-weight: 600;
  transition: color 0.2s;
}

.main-nav a:hover,
.main-nav a.active {
  color: #f08146;
}

/* ===== HERO ===== */
.hero {
  position: relative;
  text-align: center;
  color: #fff;
}

.hero img {
  width: 100%;
  height: 400px;
  object-fit: cover;
  filter: brightness(70%);
}

.hero-inner {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.hero-inner h1 {
  font-size: 2.5rem;
  letter-spacing: 1px;
}

.hero-inner .tagline {
  font-size: 1.2rem;
  margin-top: 10px;
}

/* ===== FEATURES ===== */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 25px;
  padding: 50px 10%;
  background-color: #f9f9f9;
}

.feature {
  background: #fff;
  border-radius: 12px;
  padding: 25px;
  box-shadow: 0 3px 8px rgba(0, 0, 0, 0.05);
  text-align: center;
  transition: transform 0.2s ease;
}

.feature:hover {
  transform: translateY(-5px);
}

.feature h3 {
  color: #52b5b5;
  margin-bottom: 10px;
}

/* ===== PRODUCT SECTION ===== */
.product-section {
  padding: 60px 10%;
  text-align: center;
}

.product-section h2 {
  color: #f08146;
  font-size: 2rem;
  margin-bottom: 30px;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
  justify-items: center;
}

/* Product card base */
.product-card {
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 3px 10px rgba(0,0,0,0.05);
  overflow: hidden;
  width: 280px;
  transition: transform 0.2s ease;
}

.product-card:hover {
  transform: translateY(-5px);
}

/* ✅ Giữ ảnh sản phẩm tỷ lệ 1:1 (vuông) */
.product-media {
  display: block;
  width: 100%;
  aspect-ratio: 1 / 1;      /* Tạo khung vuông */
  overflow: hidden;
  border-bottom: 1px solid #eee;
}

.product-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;        /* Lấp đầy khung, không méo ảnh */
  display: block;
}

/* Product body */
.product-body {
  padding: 15px 18px;
}

.product-title a {
  color: #222;
  text-decoration: none;
  font-weight: 600;
}

.product-meta {
  font-size: 0.9rem;
  color: #555;
  margin-top: 6px;
  min-height: 40px;
}

.product-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 10px;
}

.price {
  color: #f08146;
  font-weight: bold;
}

.add-to-cart {
  background: #52b5b5;
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 8px 12px;
  cursor: pointer;
  transition: background 0.2s;
}

.add-to-cart:hover {
  background: #fbc849;
  color: #222;
}

/* Slideshow (nếu có nhiều ảnh thay nhau) */
.product-slideshow {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  overflow: hidden;
}

.product-slideshow img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  opacity: 0;
  transition: opacity 0.8s ease;
}

.product-slideshow img.active {
  opacity: 1;
}

/* ===== PROMO ===== */
.promo {
  padding: 70px 10%;
  background-color: #fbc849;
  text-align: center;
  color: #222;
}

.promo h2 {
  margin-bottom: 15px;
}

.btn-secondary {
  display: inline-block;
  margin-top: 15px;
  padding: 10px 20px;
  background-color: #f08146;
  color: #fff;
  text-decoration: none;
  border-radius: 8px;
  transition: background 0.2s;
}

.btn-secondary:hover {
  background-color: #52b5b5;
}

/* ===== FOOTER ===== */
.footer-support {
  text-align: center;
  width: 100%;
  margin-top: 20px;
}

.footer-support ul {
  list-style: none;
  display: flex;
  justify-content: center;
  gap: 40px;
  padding: 0;
  margin: 0;
}

.footer-support ul li a {
  text-decoration: none;
  color: #555;
  font-weight: 500;
  transition: color 0.2s;
}

.footer-support ul li a:hover {
  color: #52b5b5;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .main-nav ul {
    flex-direction: column;
    gap: 10px;
  }

  .site-header {
    padding: 20px;
  }

  .hero img {
    height: 250px;
  }
}

/* ===== MOBILE OPTIMIZATION ===== */
@media (max-width: 768px) {
  /* Header */
  .site-header {
    flex-direction: column;
    align-items: flex-start;
    padding: 15px;
  }

  .logo img {
    height: 50px;
  }

  .main-nav ul {
    flex-direction: column;
    width: 100%;
    gap: 10px;
    margin-top: 10px;
  }

  .main-nav ul li {
    text-align: left;
  }

  /* Hero / banner */
  .hero img {
    height: 200px;
    object-fit: cover;
  }

  .hero-inner h1 {
    font-size: 1.6rem;
  }

  .hero-inner .tagline {
    font-size: 1rem;
  }

  /* Features */
  .features {
    padding: 30px 5%;
    grid-template-columns: 1fr;
  }

  /* Product section */
  .product-section {
    padding: 30px 5%;
  }

  .product-grid {
    grid-template-columns: 1fr; /* 1 sản phẩm mỗi hàng */
    gap: 20px;
  }

  .product-card {
    width: 100%;
  }

  .product-media {
    aspect-ratio: 1 / 1;
  }

  /* Promo */
  .promo {
    padding: 40px 5%;
  }

  /* Footer */
  .footer-support ul {
    flex-direction: column;
    gap: 10px;
  }
}