:root {
    --primary-color: #017439;
    --secondary-color: #FFFFFF;
    --text-color-dark: #333333;
    --text-color-light: #ffffff;
    --button-register: #C30808;
    --button-login: #C30808;
    --button-text-yellow: #FFFF00;
    --background-white: #FFFFFF;
    --border-light: #e0e0e0;
}

.page-khuyen-mai-hoan-tra {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    color: var(--text-color-dark); /* Default text color for light body background */
    background-color: var(--background-white); /* Explicitly set for clarity, though body is white */
}

.page-khuyen-mai-hoan-tra__container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* Hero Section */
.page-khuyen-mai-hoan-tra__hero-section {
    padding-top: 10px; /* Rely on shared.css for body padding-top */
    margin-bottom: 40px;
    position: relative;
}

.page-khuyen-mai-hoan-tra__hero-image {
    width: 100%;
    height: auto;
    overflow: hidden;
}

.page-khuyen-mai-hoan-tra__hero-image img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
    min-width: 200px; /* Minimum image size */
    min-height: 200px; /* Minimum image size */
}

.page-khuyen-mai-hoan-tra__hero-content {
    background-color: var(--background-white);
    padding: 30px 0;
    text-align: center;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.page-khuyen-mai-hoan-tra__main-title {
    font-size: clamp(28px, 4vw, 48px); /* H1 font size with clamp */
    color: var(--primary-color);
    margin-bottom: 15px;
    font-weight: 700;
    line-height: 1.2;
}

.page-khuyen-mai-hoan-tra__description {
    font-size: 18px;
    color: var(--text-color-dark);
    max-width: 800px;
    margin: 0 auto 30px auto;
}

.page-khuyen-mai-hoan-tra__cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap; /* Allow wrapping on smaller screens */
}

.page-khuyen-mai-hoan-tra__btn-primary,
.page-khuyen-mai-hoan-tra__btn-secondary {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: bold;
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
    max-width: 100%; /* Button responsiveness */
    box-sizing: border-box; /* Button responsiveness */
    white-space: normal; /* Button text wrapping */
    word-wrap: break-word; /* Button text wrapping */
}

.page-khuyen-mai-hoan-tra__btn-primary {
    background-color: var(--button-register); /* Register color for primary CTA */
    color: var(--button-text-yellow);
    border: 2px solid var(--button-register);
}

.page-khuyen-mai-hoan-tra__btn-primary:hover {
    background-color: #a30606; /* Darker red */
    border-color: #a30606;
}

.page-khuyen-mai-hoan-tra__btn-secondary {
    background-color: var(--secondary-color);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.page-khuyen-mai-hoan-tra__btn-secondary:hover {
    background-color: var(--primary-color);
    color: var(--secondary-color);
}

/* General Section Styling */
.page-khuyen-mai-hoan-tra__section {
    padding: 60px 0;
    margin-bottom: 20px;
}

.page-khuyen-mai-hoan-tra__section-title {
    font-size: clamp(24px, 3.5vw, 40px);
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 30px;
    font-weight: 700;
}

.page-khuyen-mai-hoan-tra__sub-title {
    font-size: clamp(20px, 2.5vw, 30px);
    color: var(--primary-color);
    margin-top: 40px;
    margin-bottom: 20px;
    font-weight: 600;
}

.page-khuyen-mai-hoan-tra__text-block {
    font-size: 16px;
    margin-bottom: 15px;
    color: var(--text-color-dark);
}

.page-khuyen-mai-hoan-tra__image-content {
    margin: 30px 0;
    text-align: center;
}

.page-khuyen-mai-hoan-tra__image-content img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    min-width: 200px; /* Minimum image size */
    min-height: 200px; /* Minimum image size */
}

.page-khuyen-mai-hoan-tra__image-caption {
    font-size: 14px;
    color: #666;
    margin-top: 10px;
}

.page-khuyen-mai-hoan-tra__list {
    list-style: disc;
    padding-left: 25px;
    margin-bottom: 20px;
    color: var(--text-color-dark);
}

.page-khuyen-mai-hoan-tra__ordered-list {
    list-style: decimal;
    padding-left: 25px;
    margin-bottom: 20px;
    color: var(--text-color-dark);
}

.page-khuyen-mai-hoan-tra__list-item {
    margin-bottom: 10px;
    font-size: 16px;
}

/* Dark background sections */
.page-khuyen-mai-hoan-tra__dark-section {
    background-color: var(--primary-color);
    color: var(--text-color-light);
}

.page-khuyen-mai-hoan-tra__dark-section .page-khuyen-mai-hoan-tra__section-title,
.page-khuyen-mai-hoan-tra__dark-section .page-khuyen-mai-hoan-tra__sub-title {
    color: var(--secondary-color);
}

.page-khuyen-mai-hoan-tra__dark-section .page-khuyen-mai-hoan-tra__text-block,
.page-khuyen-mai-hoan-tra__dark-section .page-khuyen-mai-hoan-tra__list,
.page-khuyen-mai-hoan-tra__dark-section .page-khuyen-mai-hoan-tra__ordered-list,
.page-khuyen-mai-hoan-tra__dark-section .page-khuyen-mai-hoan-tra__list-item {
    color: var(--text-color-light);
}

/* Table Styling */
.page-khuyen-mai-hoan-tra__table-wrapper {
    overflow-x: auto;
    margin-bottom: 30px;
    border: 1px solid var(--border-light);
    border-radius: 8px;
}

.page-khuyen-mai-hoan-tra__cashback-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 600px; /* Ensure table is readable on smaller screens by allowing scroll */
}

.page-khuyen-mai-hoan-tra__cashback-table th,
.page-khuyen-mai-hoan-tra__cashback-table td {
    padding: 12px 15px;
    border: 1px solid var(--border-light);
    text-align: left;
    font-size: 16px;
}

.page-khuyen-mai-hoan-tra__cashback-table th {
    background-color: var(--primary-color);
    color: var(--secondary-color);
    font-weight: bold;
}

.page-khuyen-mai-hoan-tra__cashback-table tbody tr:nth-child(even) {
    background-color: #f8f8f8;
}

.page-khuyen-mai-hoan-tra__dark-section .page-khuyen-mai-hoan-tra__cashback-table th {
    background-color: #00562e; /* Darker primary for contrast */
    color: var(--secondary-color);
}

.page-khuyen-mai-hoan-tra__dark-section .page-khuyen-mai-hoan-tra__cashback-table tbody tr:nth-child(even) {
    background-color: rgba(255, 255, 255, 0.05);
}

.page-khuyen-mai-hoan-tra__dark-section .page-khuyen-mai-hoan-tra__cashback-table td {
    color: var(--text-color-light);
    border-color: rgba(255, 255, 255, 0.2);
}

/* FAQ Section */
.page-khuyen-mai-hoan-tra__faq-list {
    margin-top: 30px;
}

.page-khuyen-mai-hoan-tra__faq-item {
    background-color: rgba(255, 255, 255, 0.1); /* Light background for FAQ items in dark section */
    border-radius: 8px;
    margin-bottom: 15px;
    overflow: hidden;
    color: var(--text-color-light);
}

.page-khuyen-mai-hoan-tra__faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    font-weight: bold;
    font-size: 18px;
    cursor: pointer;
    background-color: rgba(255, 255, 255, 0.05); /* Slightly darker for summary */
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    list-style: none; /* Hide default marker for details */
}

.page-khuyen-mai-hoan-tra__faq-question::-webkit-details-marker {
    display: none;
}

.page-khuyen-mai-hoan-tra__faq-question::marker {
    display: none;
}

.page-khuyen-mai-hoan-tra__faq-toggle {
    font-size: 24px;
    transition: transform 0.3s ease;
}

.page-khuyen-mai-hoan-tra__faq-item[open] .page-khuyen-mai-hoan-tra__faq-toggle {
    transform: rotate(45deg);
}

.page-khuyen-mai-hoan-tra__faq-answer {
    padding: 15px 20px;
    font-size: 16px;
    color: var(--text-color-light);
}

.page-khuyen-mai-hoan-tra__faq-answer p {
    margin-bottom: 0;
    color: var(--text-color-light);
}

.page-khuyen-mai-hoan-tra__cta-bottom {
    text-align: center;
    margin-top: 50px;
}

/* Responsive Styles */
@media (max-width: 768px) {
    .page-khuyen-mai-hoan-tra {
        font-size: 16px;
        line-height: 1.6;
    }

    .page-khuyen-mai-hoan-tra__hero-section {
        padding-top: 10px; /* Mobile top padding */
        margin-bottom: 20px;
    }

    .page-khuyen-mai-hoan-tra__hero-content {
        padding: 20px 0;
    }

    .page-khuyen-mai-hoan-tra__main-title {
        font-size: 32px;
        margin-bottom: 10px;
    }

    .page-khuyen-mai-hoan-tra__description {
        font-size: 16px;
        margin-bottom: 20px;
    }

    .page-khuyen-mai-hoan-tra__cta-buttons {
        flex-direction: column; /* Stack buttons vertically */
        gap: 15px;
        padding-left: 15px;
        padding-right: 15px;
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
    }

    .page-khuyen-mai-hoan-tra__btn-primary,
    .page-khuyen-mai-hoan-tra__btn-secondary {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        padding: 12px 20px !important;
        white-space: normal !important;
        word-wrap: break-word !important;
    }

    .page-khuyen-mai-hoan-tra__section {
        padding: 40px 0;
    }

    .page-khuyen-mai-hoan-tra__section-title {
        font-size: 28px;
        margin-bottom: 20px;
    }

    .page-khuyen-mai-hoan-tra__sub-title {
        font-size: 22px;
        margin-top: 30px;
        margin-bottom: 15px;
    }

    .page-khuyen-mai-hoan-tra__text-block,
    .page-khuyen-mai-hoan-tra__list-item,
    .page-khuyen-mai-hoan-tra__cashback-table th,
    .page-khuyen-mai-hoan-tra__cashback-table td,
    .page-khuyen-mai-hoan-tra__faq-question,
    .page-khuyen-mai-hoan-tra__faq-answer {
        font-size: 15px;
    }

    /* Image responsiveness for all images and containers */
    .page-khuyen-mai-hoan-tra img {
        max-width: 100% !important;
        width: 100% !important;
        height: auto !important;
        display: block !important;
    }

    .page-khuyen-mai-hoan-tra__section,
    .page-khuyen-mai-hoan-tra__container,
    .page-khuyen-mai-hoan-tra__hero-image,
    .page-khuyen-mai-hoan-tra__hero-content,
    .page-khuyen-mai-hoan-tra__table-wrapper,
    .page-khuyen-mai-hoan-tra__faq-list,
    .page-khuyen-mai-hoan-tra__cta-bottom {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        padding-left: 15px;
        padding-right: 15px;
    }

    .page-khuyen-mai-hoan-tra__table-wrapper {
        padding: 0; /* Remove padding from wrapper to let table scroll */
    }

    .page-khuyen-mai-hoan-tra__cashback-table {
        min-width: unset; /* Allow table to shrink, but still scroll */
        width: auto;
    }

    .page-khuyen-mai-hoan-tra__card {
        padding: 20px;
        box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    }
}