/*=====================================================================
  Trang: Khuyến Mãi - da ga c4
  File: khuyen-mai.css
  Mô tả: CSS cho trang khuyến mãi với chủ đề Black Gold
  =====================================================================*/

/* ---- Hero Banner: Bắt buộc desktop + mobile ---- */
.page-khuyen-mai__hero {
  background-color: #0A0A0A;
  padding-top: 10px; /* Khoảng cách trên nhỏ sau header cố định */
  padding-bottom: 20px;
}

.page-khuyen-mai__hero-image-wrapper {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 16px;
}

.page-khuyen-mai__hero-image {
  width: 100%;
  height: auto;
  aspect-ratio: 17 / 5;
  object-fit: cover;
  display: block;
  border-radius: 8px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.4);
}

.page-khuyen-mai__hero-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 16px 0;
  text-align: center;
}

.page-khuyen-mai__hero-title {
  font-size: clamp(1.4rem, 4vw, 2.2rem);
  font-weight: 700;
  line-height: 1.3;
  color: #FFF6D6;
  margin-bottom: 16px;
  text-shadow: 0 2px 4px rgba(0,0,0,0.5);
}

.page-khuyen-mai__hero-subtitle {
  font-size: 1rem;
  line-height: 1.6;
  color: #FFE9B3;
  max-width: 800px;
  margin: 0 auto 24px;
}

.page-khuyen-mai__hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ---- Buttons: Áp dụng gradient tùy chỉnh ---- */
.page-khuyen-mai__btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: 50px;
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.5;
  text-decoration: none;
  text-align: center;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.page-khuyen-mai__btn--primary {
  background: linear-gradient(180deg, #FFD86A 0%, #DDA11D 100%);
  color: #1a1a1a;
  box-shadow: 0 4px 12px rgba(242, 193, 78, 0.3);
}

.page-khuyen-mai__btn--secondary {
  background: linear-gradient(180deg, #FFD86A 0%, #DDA11D 100%);
  color: #1a1a1a;
  box-shadow: 0 4px 12px rgba(242, 193, 78, 0.3);
}

.page-khuyen-mai__btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(242, 193, 78, 0.5);
}

/* ---- Logo Grid: 4 cột desktop, mục 5&6 ép vào giữa ---- */
.page-khuyen-mai__logo-grid-section {
  background-color: #0A0A0A;
  padding: 40px 16px 20px;
}

.page-khuyen-mai__section-title {
  text-align: center;
  font-size: clamp(1.4rem, 4vw, 2rem);
  font-weight: 600;
  color: #FFF6D6;
  margin-bottom: 8px;
  line-height: 1.3;
}

.page-khuyen-mai__section-desc {
  text-align: center;
  color: #E8D9B5;
  max-width: 700px;
  margin: 0 auto 32px;
}

.page-khuyen-mai__logo-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px 16px;
  justify-items: center;
  max-width: 1200px;
  margin: 0 auto;
}

.page-khuyen-mai__logo-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  max-width: 280px;
  width: 100%;
  background-color: #111111;
  border: 1px solid #3A2A12;
  border-radius: 8px;
  padding: 20px 16px;
  transition: box-shadow 0.3s ease;
}

.page-khuyen-mai__logo-item:hover {
  box-shadow: 0 0 16px rgba(255, 211, 107, 0.3);
}

.page-khuyen-mai__logo-image {
  width: 100%;
  aspect-ratio: 2 / 1;
  object-fit: contain;
  border-radius: 4px;
}

.page-khuyen-mai__logo-cta {
  padding: 10px 24px;
  border-radius: 50px;
  background: linear-gradient(180deg, #FFD86A 0%, #DDA11D 100%);
  color: #1a1a1a;
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  text-align: center;
  transition: transform 0.2s ease;
}

.page-khuyen-mai__logo-cta:hover {
  transform: scale(1.05);
}

/* Đặt 2 mục cuối ở giữa cho đủ 6 mục với grid 4 cột */
.page-khuyen-mai__logo-item:nth-child(5) {
  grid-column: 2;
}

.page-khuyen-mai__logo-item:nth-child(6) {
  grid-column: 3;
}

/* ---- Guide / Hướng dẫn nhận khuyến mãi ---- */
.page-khuyen-mai__guide-section {
  background-color: #0A0A0A;
}

.page-khuyen-mai__guide-inner {
  max-width: 1000px;
  margin: 0 auto;
  padding: 20px 16px 64px;
}

.page-khuyen-mai__guide-title {
  text-align: center;
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 600;
  color: #F2C14E;
  margin-bottom: 8px;
}

.page-khuyen-mai__guide-intro {
  text-align: center;
  color: #E8D9B5;
  max-width: 800px;
  margin: 0 auto 40px;
}

.page-khuyen-mai__guide-step {
  margin-bottom: 48px;
  text-align: center;
}

.page-khuyen-mai__guide-figure {
  margin: 0 0 24px;
}

.page-khuyen-mai__guide-figure img {
  width: 100%;
  max-width: 800px;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid #3A2A12;
}

.page-khuyen-mai__guide-subtitle {
  font-size: clamp(1.2rem, 3vw, 1.5rem);
  font-weight: 500;
  color: #FFF6D6;
  margin-bottom: 12px;
}

.page-khuyen-mai__guide-text {
  color: #E8D9B5;
  line-height: 1.7;
  max-width: 700px;
  margin: 0 auto 24px;
}

/* ---- Responsive: Tablet & Mobile (bắt buộc) ---- */
@media (max-width: 1024px) {
  .page-khuyen-mai__logo-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-khuyen-mai__logo-item:nth-child(5) {
    grid-column: auto;
  }
  .page-khuyen-mai__logo-item:nth-child(6) {
    grid-column: auto;
  }
}

@media (max-width: 768px) {
  /* Hero */
  .page-khuyen-mai__hero-image {
    aspect-ratio: 2 / 1;
    max-width: 100%;
    height: auto;
  }

  .page-khuyen-mai__hero-title {
    font-size: clamp(1rem, 6vw, 1.5rem);
  }

  .page-khuyen-mai__hero-subtitle {
    font-size: 0.9rem;
  }

  .page-khuyen-mai__hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .page-khuyen-mai__btn {
    max-width: 100%;
    box-sizing: border-box;
    white-space: normal;
    word-wrap: break-word;
    width: 100%;
  }

  /* Logo Grid 2 cột, bỏ định vị đặc biệt */
  .page-khuyen-mai__logo-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .page-khuyen-mai__logo-item:nth-child(5),
  .page-khuyen-mai__logo-item:nth-child(6) {
    grid-column: auto;
  }

  .page-khuyen-mai__logo-item {
    max-width: 100%;
  }

  .page-khuyen-mai__logo-image {
    width: 100%;
    height: auto;
  }

  .page-khuyen-mai__logo-cta {
    max-width: 100%;
    box-sizing: border-box;
    white-space: normal;
    word-wrap: break-word;
  }

  /* Guide */
  .page-khuyen-mai__guide-inner {
    padding: 16px 12px 48px;
  }

  /* Đảm bảo mọi ảnh trong nội dung không tràn viewport */
  .page-khuyen-mai img {
    max-width: 100% !important;
    height: auto !important;
  }
}

/* Giữ đúng màu chủ đạo và không dùng filter đổi màu ảnh */