: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;
    --body-bg: #FFFFFF; /* Assuming body background is light from shared.css */
}

.page-khuyen-mai {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color-dark); /* Default text color for light body bg */
    background-color: var(--body-bg);
}

.page-khuyen-mai__container {
    max-width: 1170px;
    margin: 0 auto;
    padding: 40px 16px;
}

.page-khuyen-mai__section {
    padding: 60px 0;
}

/* Hero Section */
.page-khuyen-mai__hero-section {
    padding-top: 10px; /* Small top padding, header offset handled by body in shared.css */
    padding-bottom: 60px;
    background-color: var(--primary-color); /* Hero background color */
    color: var(--text-color-light); /* Light text for dark hero background */
    text-align: center;
}

.page-khuyen-mai__hero-content-wrapper {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 16px;
}

.page-khuyen-mai__main-title {
    font-size: clamp(2.2rem, 4vw, 3.5rem); /* Using clamp for H1 font size */
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
    color: var(--text-color-light);
}

.page-khuyen-mai__intro-text {
    font-size: 1.15rem;
    margin-bottom: 30px;
    color: var(--text-color-light);
}

.page-khuyen-mai__cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 30px;
    flex-wrap: wrap; /* Allow buttons to wrap on smaller screens */
}

.page-khuyen-mai__btn-primary,
.page-khuyen-mai__btn-secondary {
    display: inline-block;
    padding: 15px 30px;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 700;
    text-decoration: none;
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
    text-align: center;
    box-sizing: border-box;
    max-width: 100%; /* For mobile button adaptation */
    white-space: normal; /* Allow text wrap */
    word-wrap: break-word; /* Allow text wrap */
}

.page-khuyen-mai__btn-primary {
    background-color: var(--button-register); /* Red for register/primary action */
    color: var(--text-color-light); /* White text for contrast */
    border: 2px solid var(--button-register);
}

.page-khuyen-mai__btn-primary:hover {
    background-color: #a30707; /* Darken red */
    border-color: #a30707;
}

.page-khuyen-mai__btn-primary--yellow-text {
    color: var(--button-text-yellow); /* Yellow text for specific buttons */
}

.page-khuyen-mai__btn-secondary {
    background-color: transparent;
    color: var(--text-color-light);
    border: 2px solid var(--text-color-light);
}

.page-khuyen-mai__btn-secondary:hover {
    background-color: var(--text-color-light);
    color: var(--primary-color);
}

/* Section Titles */
.page-khuyen-mai__section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 40px;
    text-align: center;
    color: var(--primary-color); /* Primary color for section titles */
}

.page-khuyen-mai__section-title--white {
    color: var(--text-color-light);
}

.page-khuyen-mai__sub-title {
    font-size: 1.8rem;
    font-weight: 600;
    margin-top: 25px;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.page-khuyen-mai__sub-title--white {
    color: var(--text-color-light);
}

/* Content Wrappers for Image & Text */
.page-khuyen-mai__content-wrapper {
    display: flex;
    gap: 40px;
    align-items: center;
    margin-bottom: 40px;
    flex-wrap: wrap; /* Allow wrapping on smaller screens */
}

.page-khuyen-mai__content-wrapper--reverse {
    flex-direction: row-reverse;
}

.page-khuyen-mai__text-block {
    flex: 1;
    min-width: 300px;
    color: var(--text-color-dark);
}

.page-khuyen-mai__text-block--white {
    color: var(--text-color-light);
}

.page-khuyen-mai__text-block p {
    margin-bottom: 15px;
}

.page-khuyen-mai__image-block {
    flex: 1;
    min-width: 300px;
    text-align: center;
}

.page-khuyen-mai__content-image {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    display: block; /* Ensure it behaves as a block element */
    margin: 0 auto;
}

/* Specific Section Styles */
.page-khuyen-mai__overview-section,
.page-khuyen-mai__daily-weekly-section,
.page-khuyen-mai__terms-section,
.page-khuyen-mai__faq-section {
    background-color: var(--secondary-color); /* Light background for these sections */
    color: var(--text-color-dark);
}

.page-khuyen-mai__new-member-section,
.page-khuyen-mai__vip-section,
.page-khuyen-mai__conclusion-section {
    background-color: var(--primary-color); /* Dark background for these sections */
    color: var(--text-color-light);
}

/* Promo List */
.page-khuyen-mai__promo-list {
    list-style: none;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.page-khuyen-mai__promo-item {
    background-color: var(--secondary-color);
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
    color: var(--text-color-dark);
}

.page-khuyen-mai__promo-item h3 {
    color: var(--primary-color);
    margin-top: 0;
}

/* FAQ Section */
.page-khuyen-mai__faq-list {
    margin-top: 40px;
}

.page-khuyen-mai__faq-item {
    background-color: var(--secondary-color);
    margin-bottom: 15px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    border: 1px solid #eee;
    overflow: hidden;
}

.page-khuyen-mai__faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 25px;
    font-size: 1.15rem;
    font-weight: 600;
    cursor: pointer;
    color: var(--primary-color);
    background-color: var(--secondary-color);
    list-style: none; /* For details/summary */
}

/* Hide default details marker */
.page-khuyen-mai__faq-item summary::-webkit-details-marker,
.page-khuyen-mai__faq-item summary::marker {
    display: none;
    content: "";
}

.page-khuyen-mai__faq-toggle {
    font-size: 1.5rem;
    line-height: 1;
    margin-left: 15px;
    color: var(--primary-color);
}

.page-khuyen-mai__faq-item[open] .page-khuyen-mai__faq-toggle {
    content: "−"; /* Changed by JS */
}

.page-khuyen-mai__faq-answer {
    padding: 0 25px 20px;
    font-size: 1rem;
    color: var(--text-color-dark);
}

.page-khuyen-mai__faq-answer p {
    margin-bottom: 0;
}

/* Conclusion Link */
.page-khuyen-mai__conclusion-link {
    color: var(--button-text-yellow); /* Yellow text for conclusion link */
    text-decoration: underline;
    font-weight: 600;
}

.page-khuyen-mai__conclusion-link:hover {
    color: var(--text-color-light);
}

/* Responsive Styles */
@media (max-width: 1024px) {
    .page-khuyen-mai__main-title {
        font-size: clamp(2rem, 5vw, 3rem);
    }
    .page-khuyen-mai__section-title {
        font-size: 2rem;
    }
    .page-khuyen-mai__sub-title {
        font-size: 1.6rem;
    }
    .page-khuyen-mai__content-wrapper {
        flex-direction: column;
        text-align: center;
    }
    .page-khuyen-mai__content-wrapper--reverse {
        flex-direction: column; /* Keep column for reverse on tablet */
    }
    .page-khuyen-mai__image-block {
        order: -1; /* Image appears above text on tablet for both layouts */
    }
    .page-khuyen-mai__content-wrapper--reverse .page-khuyen-mai__image-block {
        order: -1;
    }
}

@media (max-width: 768px) {
    /* Fixed Header Spacing */
    .page-khuyen-mai__hero-section {
        padding-top: 10px !important; /* Small top padding, header offset handled by body in shared.css */
    }

    .page-khuyen-mai__container {
        padding: 20px 15px;
    }

    .page-khuyen-mai__section {
        padding: 40px 0;
    }

    /* HERO Section */
    .page-khuyen-mai__main-title {
        font-size: clamp(1.8rem, 7vw, 2.5rem) !important;
        margin-bottom: 15px !important;
    }
    .page-khuyen-mai__intro-text {
        font-size: 1rem !important;
        margin-bottom: 20px !important;
    }
    .page-khuyen-mai__cta-buttons {
        flex-direction: column !important;
        gap: 10px !important;
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        padding-left: 15px;
        padding-right: 15px;
        overflow-x: hidden;
    }
    .page-khuyen-mai__btn-primary,
    .page-khuyen-mai__btn-secondary {
        max-width: 100% !important;
        width: 100% !important;
        padding: 12px 20px !important;
        font-size: 1rem !important;
        white-space: normal !important;
        word-wrap: break-word !important;
    }

    /* Section Titles */
    .page-khuyen-mai__section-title {
        font-size: 1.8rem !important;
        margin-bottom: 30px !important;
    }
    .page-khuyen-mai__sub-title {
        font-size: 1.4rem !important;
        margin-top: 20px !important;
        margin-bottom: 10px !important;
    }

    /* Content Wrappers */
    .page-khuyen-mai__content-wrapper,
    .page-khuyen-mai__content-wrapper--reverse {
        flex-direction: column !important; /* Ensure column layout on mobile */
        gap: 20px !important;
    }
    .page-khuyen-mai__image-block {
        order: -1 !important; /* Image always on top on mobile */
    }

    /* Promo List */
    .page-khuyen-mai__promo-list {
        grid-template-columns: 1fr !important;
        gap: 20px !important;
    }
    .page-khuyen-mai__promo-item {
        padding: 20px !important;
    }

    /* FAQ Section */
    .page-khuyen-mai__faq-question {
        padding: 15px 20px !important;
        font-size: 1rem !important;
    }
    .page-khuyen-mai__faq-answer {
        padding: 0 20px 15px !important;
    }

    /* All Images Responsive */
    .page-khuyen-mai img {
        max-width: 100% !important;
        width: 100% !important;
        height: auto !important;
        box-sizing: border-box !important;
    }

    /* All containing elements for images/buttons */
    .page-khuyen-mai__section,
    .page-khuyen-mai__card,
    .page-khuyen-mai__container,
    .page-khuyen-mai__cta-buttons,
    .page-khuyen-mai__button-group,
    .page-khuyen-mai__btn-container {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        padding-left: 15px;
        padding-right: 15px;
        overflow-x: hidden;
    }
}