/* style/support.css */
/* Đảm bảo tất cả các lớp CSS đều tuân thủ quy tắc BEM (page-support__element-name) */

:root {
    --primary-color: #017439;
    --secondary-color: #FFFFFF;
    --text-on-dark: #FFFFFF;
    --text-on-light: #333333;
    --button-register-login-bg: #C30808;
    --button-register-login-text: #FFFFFF; /* Đã điều chỉnh để đảm bảo độ tương phản WCAG AA */
    --body-bg: #121212; /* Lấy từ shared.css */
}

.page-support {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-on-dark); /* Mặc định chữ trắng trên nền tối của body */
}

/* Phần Hero */
.page-support__hero-section {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 60px 20px;
    padding-top: var(--header-offset, 120px); /* Đảm bảo khoảng cách với header cố định */
    background-color: var(--primary-color);
    color: var(--text-on-dark);
    overflow: hidden;
}

.page-support__dark-bg {
    background-color: var(--primary-color);
    color: var(--text-on-dark);
}

.page-support__light-bg {
    background-color: var(--secondary-color);
    color: var(--text-on-light);
}

.page-support__hero-content {
    max-width: 900px;
    z-index: 1;
    margin-bottom: 40px;
}

.page-support__hero-title {
    font-size: 3.2em;
    margin-bottom: 20px;
    font-weight: bold;
    color: var(--text-on-dark);
}

.page-support__hero-description {
    font-size: 1.2em;
    margin-bottom: 30px;
    line-height: 1.8;
    color: var(--text-on-dark);
}

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

.page-support__btn-primary,
.page-support__btn-secondary {
    display: inline-block;
    padding: 15px 30px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: bold;
    font-size: 1.1em;
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
    max-width: 100%;
    box-sizing: border-box;
    white-space: normal;
    word-wrap: break-word;
    text-align: center;
}

.page-support__btn-primary {
    background-color: var(--button-register-login-bg); /* Màu đỏ cho Đăng Ký */
    color: var(--button-register-login-text); /* Chữ trắng để đảm bảo tương phản */
    border: 2px solid var(--button-register-login-bg);
}

.page-support__btn-primary:hover {
    background-color: #a00606; /* Làm tối màu đỏ một chút */
    border-color: #a00606;
}

.page-support__btn-secondary {
    background-color: transparent;
    color: var(--text-on-dark);
    border: 2px solid var(--text-on-dark);
}

.page-support__btn-secondary:hover {
    background-color: var(--text-on-dark);
    color: var(--primary-color);
}

.page-support__hero-image-wrapper {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.1;
    overflow: hidden;
}

.page-support__hero-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    filter: grayscale(50%); /* Chỉ làm mờ, không thay đổi màu sắc */
}

/* Các phần chung */
.page-support__container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.page-support__section-title {
    font-size: 2.5em;
    text-align: center;
    margin-bottom: 20px;
    font-weight: bold;
}

.page-support__section-intro {
    font-size: 1.1em;
    text-align: center;
    max-width: 800px;
    margin: 0 auto 50px auto;
    line-height: 1.7;
}

.page-support__channels-section,
.page-support__faq-section,
.page-support__guide-section,
.page-support__commitment-section,
.page-support__cta-section {
    padding: 80px 0;
}

.page-support__card {
    background-color: var(--secondary-color);
    color: var(--text-on-light);
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    padding: 30px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    height: 100%; /* Đảm bảo chiều cao đồng nhất trong flex/grid */
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.page-support__card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

/* Kênh hỗ trợ */
.page-support__channels-grid,
.page-support__guide-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.page-support__channel-icon,
.page-support__guide-icon {
    width: 100%;
    height: 250px;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 20px;
    display: block;
}

.page-support__channel-title,
.page-support__guide-title {
    font-size: 1.8em;
    margin-bottom: 15px;
    font-weight: bold;
    color: var(--primary-color);
}

.page-support__channel-description {
    font-size: 1em;
    line-height: 1.7;
    margin-bottom: 20px;
    flex-grow: 1;
}

.page-support__btn-small {
    padding: 10px 20px;
    font-size: 0.9em;
}

/* FAQ */
.page-support__faq-list {
    max-width: 900px;
    margin: 0 auto;
}

.page-support__faq-item {
    background-color: var(--secondary-color);
    border-radius: 8px;
    margin-bottom: 15px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.page-support__faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 25px;
    cursor: pointer;
    background-color: #f8f8f8;
    border-bottom: 1px solid #eee;
    color: var(--text-on-light);
    font-weight: bold;
    font-size: 1.1em;
    transition: background-color 0.3s ease;
}

.page-support__faq-question:hover {
    background-color: #f0f0f0;
}

.page-support__faq-question h3 {
    margin: 0;
    font-size: 1.1em;
    color: var(--primary-color);
}

.page-support__faq-toggle {
    font-size: 1.5em;
    font-weight: bold;
    color: var(--primary-color);
    transition: transform 0.3s ease;
}

.page-support__faq-item.active .page-support__faq-toggle {
    transform: rotate(45deg);
}

.page-support__faq-answer {
    max-height: 0;
    overflow: hidden;
    padding: 0 25px;
    transition: max-height 0.3s ease-out, padding 0.3s ease-out;
    background-color: var(--secondary-color);
    color: var(--text-on-light);
}

.page-support__faq-item.active .page-support__faq-answer {
    max-height: 1000px !important; /* Đủ lớn để chứa mọi nội dung */
    padding: 20px 25px;
}

.page-support__faq-answer p {
    margin-bottom: 10px;
    font-size: 1em;
    line-height: 1.7;
}

.page-support__faq-answer a {
    color: var(--primary-color);
    text-decoration: underline;
}

/* Hướng dẫn giải quyết vấn đề */
.page-support__guide-card {
    text-align: left;
    color: var(--text-on-light);
}

.page-support__guide-list {
    list-style: disc;
    padding-left: 20px;
    margin-top: 15px;
    color: var(--text-on-light);
    flex-grow: 1;
}

.page-support__guide-list li {
    margin-bottom: 10px;
}

.page-support__guide-list strong {
    color: var(--primary-color);
}

/* Cam kết dịch vụ */
.page-support__commitment-section {
    background-color: var(--primary-color);
    color: var(--text-on-dark);
    text-align: center;
    padding: 100px 0;
}

.page-support__commitment-content {
    max-width: 900px;
}

.page-support__commitment-description {
    font-size: 1.2em;
    line-height: 1.8;
    margin-bottom: 40px;
}

.page-support__btn-large {
    padding: 18px 40px;
    font-size: 1.2em;
}

/* CTA cuối trang */
.page-support__cta-section {
    background-color: var(--secondary-color);
    color: var(--text-on-light);
    text-align: center;
    padding: 80px 0;
}

.page-support__cta-content {
    max-width: 800px;
}

.page-support__cta-description {
    font-size: 1.1em;
    line-height: 1.7;
    margin-bottom: 40px;
}

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

/* Responsive */
@media (max-width: 1024px) {
    .page-support__hero-title {
        font-size: 2.8em;
    }
    .page-support__section-title {
        font-size: 2em;
    }
}

@media (max-width: 768px) {
    .page-support {
        font-size: 16px;
        line-height: 1.6;
    }
    .page-support__hero-section {
        flex-direction: column;
        text-align: center;
        padding-top: var(--header-offset, 120px) !important; /* Đảm bảo khoảng cách trên di động */
    }
    .page-support__hero-title {
        font-size: 2em;
    }
    .page-support__hero-description {
        font-size: 1em;
    }
    .page-support__hero-buttons {
        flex-direction: column;
        gap: 15px;
    }
    .page-support__btn-primary,
    .page-support__btn-secondary {
        width: 100%;
        max-width: 100% !important;
        box-sizing: border-box !important;
        padding-left: 15px;
        padding-right: 15px;
    }
    .page-support__channels-grid,
    .page-support__guide-grid {
        grid-template-columns: 1fr;
    }
    .page-support__channel-card,
    .page-support__guide-card {
        padding: 20px;
    }
    .page-support__faq-question {
        padding: 15px 20px;
        font-size: 1em;
    }
    .page-support__faq-question h3 {
        font-size: 1em;
    }
    .page-support__faq-answer {
        padding: 15px 20px;
    }
    .page-support__section-title {
        font-size: 1.8em;
    }
    .page-support__section-intro {
        font-size: 0.95em;
        margin-bottom: 30px;
    }
    .page-support__commitment-description,
    .page-support__cta-description {
        font-size: 1em;
    }

    /* Responsive images and videos */
    .page-support img {
        max-width: 100% !important;
        height: auto !important;
        display: block !important;
    }
    .page-support__section,
    .page-support__card,
    .page-support__container {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        padding-left: 15px;
        padding-right: 15px;
    }
    .page-support__video-section {
        padding-top: var(--header-offset, 120px) !important;
    }
    .page-support__cta-buttons {
        flex-direction: column;
        gap: 10px;
        padding-left: 15px;
        padding-right: 15px;
    }
    .page-support__cta-buttons a {
        width: 100%;
    }
}