/* Biến màu sắc tùy chỉnh */
:root {
    --color-primary: #C61F1F;
    --color-secondary: #E53030;
    --color-button-gradient-start: #FFB04A;
    --color-button-gradient-end: #D86A14;
    --color-card-bg: #2A1212;
    --color-background-main: #140C0C;
    --color-text-main: #FFF1E8;
    --color-border: #6A1E1E;
    --color-gold: #F3C54D;
    --color-deep-red: #7E0D0D;
    --color-light-bg: #f9f9f9;
    --color-dark-text: #333333;
    --color-light-text: #ffffff;
}

/* Quy tắc chung cho trang blog */
.page-blog {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    color: var(--color-dark-text); /* Mặc định cho nền sáng */
    background-color: var(--color-light-bg);
}

.page-blog__container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.page-blog__dark-section {
    background-color: var(--color-background-main);
    color: var(--color-text-main);
}

.page-blog__light-bg {
    background-color: var(--color-light-bg);
    color: var(--color-dark-text);
}

.page-blog__section-title {
    font-size: clamp(28px, 4vw, 42px);
    font-weight: 700;
    text-align: center;
    margin-bottom: 20px;
    color: var(--color-primary);
    line-height: 1.2;
}

.page-blog__dark-section .page-blog__section-title {
    color: var(--color-gold);
}

.page-blog__subtitle {
    font-size: clamp(16px, 2.5vw, 20px);
    text-align: center;
    margin-bottom: 40px;
    color: #666;
}

.page-blog__dark-section .page-blog__subtitle {
    color: var(--color-text-main);
    opacity: 0.8;
}

.page-blog__text-content {
    font-size: 17px;
    margin-bottom: 15px;
    line-height: 1.7;
}

.page-blog__sub-title {
    font-size: clamp(22px, 3vw, 32px);
    font-weight: 600;
    margin-top: 35px;
    margin-bottom: 20px;
    color: var(--color-primary);
}

.page-blog__list,
.page-blog__ordered-list {
    list-style-position: inside;
    margin-bottom: 20px;
    padding-left: 20px;
}

.page-blog__list li,
.page-blog__ordered-list li {
    margin-bottom: 10px;
    font-size: 17px;
}

.page-blog__article-figure {
    display: block;
    max-width: 100%;
    height: auto;
    margin: 30px auto;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

/* Hero Section */
.page-blog__hero-section {
    position: relative;
    overflow: hidden;
    padding-top: 10px; /* Rely on body padding for header offset */
    padding-bottom: 50px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.page-blog__hero-image-wrapper {
    width: 100%;
    max-height: 500px;
    overflow: hidden;
}

.page-blog__hero-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    filter: brightness(0.6);
    transition: filter 0.3s ease;
}

.page-blog__hero-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 2;
    color: var(--color-text-main);
    max-width: 900px;
    width: 90%;
    padding: 20px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 10px;
}

.page-blog__main-title {
    font-size: clamp(32px, 5vw, 56px);
    font-weight: 800;
    margin-bottom: 15px;
    line-height: 1.2;
    color: var(--color-gold);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.page-blog__hero-content .page-blog__subtitle {
    font-size: clamp(18px, 2.5vw, 24px);
    margin-bottom: 30px;
    color: var(--color-text-main);
}

.page-blog__cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 20px;
    flex-wrap: wrap;
}

/* Buttons */
.page-blog__btn-primary,
.page-blog__btn-secondary,
.page-blog__btn-tertiary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    border-radius: 8px;
    font-size: 18px;
    font-weight: 700;
    text-decoration: none;
    transition: all 0.3s ease;
    white-space: nowrap;
    cursor: pointer;
    box-sizing: border-box;
}

.page-blog__btn-primary {
    background: linear-gradient(180deg, var(--color-button-gradient-start) 0%, var(--color-button-gradient-end) 100%);
    color: var(--color-light-text);
    border: none;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.page-blog__btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
    filter: brightness(1.1);
}

.page-blog__btn-secondary {
    background: transparent;
    color: var(--color-gold);
    border: 2px solid var(--color-gold);
}

.page-blog__btn-secondary:hover {
    background: var(--color-gold);
    color: var(--color-background-main);
    transform: translateY(-2px);
}

.page-blog__btn-tertiary {
    background: var(--color-deep-red);
    color: var(--color-text-main);
    border: 1px solid var(--color-deep-red);
    padding: 10px 20px;
    font-size: 16px;
    font-weight: 600;
}

.page-blog__btn-tertiary:hover {
    background: var(--color-secondary);
    border-color: var(--color-secondary);
}

/* Categories Section */
.page-blog__categories-section {
    padding: 60px 0;
    background-color: var(--color-background-main);
}

.page-blog__categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.page-blog__category-card {
    background: var(--color-card-bg);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
    text-align: center;
    padding-bottom: 20px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.page-blog__category-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
}

.page-blog__category-card .page-blog__card-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    margin-bottom: 15px;
    border-bottom: 1px solid var(--color-border);
}

.page-blog__category-card .page-blog__card-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-gold);
    margin-bottom: 10px;
    padding: 0 15px;
}

.page-blog__category-card .page-blog__card-description {
    font-size: 16px;
    color: var(--color-text-main);
    margin-bottom: 20px;
    padding: 0 15px;
}

/* Featured Articles Section */
.page-blog__featured-articles {
    padding: 60px 0;
}

.page-blog__articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.page-blog__article-card {
    background: var(--color-light-bg);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
    color: var(--color-dark-text);
}

.page-blog__article-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.page-blog__article-card .page-blog__card-image {
    width: 100%;
    height: 250px;
    object-fit: cover;
    display: block;
}

.page-blog__article-card .page-blog__card-content {
    padding: 20px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.page-blog__article-card .page-blog__card-title {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 10px;
    line-height: 1.3;
    flex-grow: 1;
}

.page-blog__article-card .page-blog__card-title a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.page-blog__article-card .page-blog__card-title a:hover {
    color: var(--color-secondary);
}

.page-blog__article-card .page-blog__card-meta {
    font-size: 14px;
    color: #888;
    margin-bottom: 15px;
}

.page-blog__article-card .page-blog__card-description {
    font-size: 16px;
    color: #555;
    margin-bottom: 20px;
    flex-grow: 1;
}

.page-blog__read-more {
    display: inline-block;
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

.page-blog__read-more:hover {
    color: var(--color-secondary);
    text-decoration: underline;
}

.page-blog__all-posts-cta {
    text-align: center;
    margin-top: 50px;
}

/* Detailed Guide Section */
.page-blog__detailed-guide {
    padding: 60px 0;
}

.page-blog__article-body {
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
    background: #ffffff;
    border-radius: 10px;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
}

/* FAQ Section */
.page-blog__faq-section {
    padding: 60px 0;
}

details.page-blog__faq-item {
  margin-bottom: 15px;
  border-radius: 5px;
  border: 1px solid var(--color-border);
  overflow: hidden;
  background: var(--color-card-bg);
  color: var(--color-text-main);
}
details.page-blog__faq-item summary.page-blog__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 20px;
  cursor: pointer;
  user-select: none;
  list-style: none;
  transition: background-color 0.3s ease;
  background-color: var(--color-card-bg);
}
details.page-blog__faq-item summary.page-blog__faq-question::-webkit-details-marker {
  display: none;
}
details.page-blog__faq-item summary.page-blog__faq-question:hover {
  background: var(--color-deep-red);
}
.page-blog__faq-qtext {
  flex: 1;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.5;
  text-align: left;
  color: var(--color-gold);
}
.page-blog__faq-toggle {
  font-size: 24px;
  font-weight: bold;
  color: var(--color-gold);
  flex-shrink: 0;
  margin-left: 15px;
  width: 28px;
  text-align: center;
}
details.page-blog__faq-item .page-blog__faq-answer {
  padding: 0 20px 20px;
  background: rgba(42, 18, 18, 0.8);
  border-radius: 0 0 5px 5px;
  color: var(--color-text-main);
  font-size: 16px;
}

/* CTA Bottom Section */
.page-blog__cta-bottom {
    padding: 60px 0;
    text-align: center;
}

/* Responsive Styles */
@media (max-width: 1024px) {
    .page-blog__container {
        padding: 20px 30px;
    }

    .page-blog__hero-content {
        padding: 15px;
    }

    .page-blog__main-title {
        font-size: clamp(28px, 4.5vw, 48px);
    }

    .page-blog__hero-content .page-blog__subtitle {
        font-size: clamp(16px, 2.2vw, 20px);
    }

    .page-blog__btn-primary,
    .page-blog__btn-secondary {
        padding: 12px 24px;
        font-size: 16px;
    }

    .page-blog__categories-grid,
    .page-blog__articles-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }

    .page-blog__category-card .page-blog__card-title {
        font-size: 22px;
    }

    .page-blog__article-card .page-blog__card-title {
        font-size: 20px;
    }

    details.page-blog__faq-item summary.page-blog__faq-question {
        padding: 15px 18px;
    }
    .page-blog__faq-qtext {
        font-size: 17px;
    }
    .page-blog__faq-toggle {
        font-size: 22px;
    }
    details.page-blog__faq-item .page-blog__faq-answer {
        padding: 0 18px 18px;
    }
}

@media (max-width: 849px) {
    .page-blog__hero-image-wrapper {
        max-height: 400px;
    }
    .page-blog__hero-image {
        object-fit: contain !important;
        aspect-ratio: unset !important;
        height: auto;
    }
    .page-blog__hero-content {
        background: rgba(0, 0, 0, 0.5);
        border-radius: 5px;
    }
}

@media (max-width: 768px) {
    .page-blog {
        font-size: 16px;
        line-height: 1.6;
    }

    .page-blog__container {
        padding: 15px;
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
    }

    .page-blog__hero-section {
        padding-top: 10px;
        padding-bottom: 30px;
    }

    .page-blog__hero-image-wrapper {
        max-height: 300px;
    }

    .page-blog__hero-image {
        max-width: 100% !important;
        width: 100% !important;
        height: auto !important;
    }

    .page-blog__hero-content {
        width: 95%;
        padding: 10px;
    }

    .page-blog__main-title {
        font-size: clamp(24px, 7vw, 40px);
        margin-bottom: 10px;
    }

    .page-blog__hero-content .page-blog__subtitle {
        font-size: clamp(15px, 3.5vw, 18px);
        margin-bottom: 20px;
    }

    .page-blog__cta-buttons {
        flex-direction: column;
        gap: 10px;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
        padding: 0 15px;
    }

    .page-blog__btn-primary,
    .page-blog__btn-secondary,
    .page-blog__btn-tertiary,
    .page-blog a[class*="button"],
    .page-blog a[class*="btn"] {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        white-space: normal !important;
        word-wrap: break-word !important;
        padding: 12px 15px;
        font-size: 16px;
    }

    .page-blog__section-title {
        font-size: clamp(24px, 6vw, 36px);
        margin-bottom: 15px;
    }

    .page-blog__subtitle {
        font-size: clamp(14px, 3.5vw, 18px);
        margin-bottom: 30px;
    }

    .page-blog__text-content {
        font-size: 16px;
    }

    .page-blog__sub-title {
        font-size: clamp(20px, 5vw, 28px);
        margin-top: 25px;
        margin-bottom: 15px;
    }

    .page-blog__list li,
    .page-blog__ordered-list li {
        font-size: 16px;
    }

    .page-blog__categories-section,
    .page-blog__featured-articles,
    .page-blog__detailed-guide,
    .page-blog__faq-section,
    .page-blog__cta-bottom {
        padding: 40px 0;
    }

    .page-blog__categories-grid,
    .page-blog__articles-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .page-blog__category-card .page-blog__card-title {
        font-size: 20px;
    }

    .page-blog__article-card .page-blog__card-title {
        font-size: 18px;
    }

    .page-blog__article-card .page-blog__card-image {
        height: 200px;
    }

    .page-blog__article-body {
        padding: 15px;
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
    }

    .page-blog img {
        max-width: 100% !important;
        width: 100% !important;
        height: auto !important;
    }

    details.page-blog__faq-item summary.page-blog__faq-question {
        padding: 15px;
    }
    .page-blog__faq-qtext {
        font-size: 16px;
    }
    .page-blog__faq-toggle {
        font-size: 20px;
        width: 24px;
        height: 24px;
    }
    details.page-blog__faq-item .page-blog__faq-answer {
        padding: 0 15px 15px;
        font-size: 15px;
    }
    .page-blog__faq-list {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        padding-left: 15px;
        padding-right: 15px;
    }
    .page-blog__all-posts-cta {
        padding: 0 15px;
        box-sizing: border-box;
    }
}