/* style/khuyen-mai.css */
:root {
    --primary-color: #C91F17;
    --secondary-color: #E53935;
    --text-main-color: #FFF5E1;
    --background-dark-color: #B71C1C;
    --card-bg-color: #D32F2F;
    --button-gradient: linear-gradient(180deg, #FFD86A 0%, #E6B800 100%);
    --border-color: #F2B544;
    --glow-color: #FFCC66;
    --gold-color: #F4D34D;
    --deep-red-color: #7A0E0E;
    --spacing-md: 20px;
    --spacing-lg: 40px;
    --spacing-xl: 60px;
}

.page-khuyen-mai {
    font-family: 'Arial', sans-serif;
    background-color: var(--background-dark-color);
    color: var(--text-main-color);
    line-height: 1.6;
    padding-bottom: var(--spacing-xl);
}

.page-khuyen-mai__container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.page-khuyen-mai__section-title {
    font-size: 2.8em;
    color: var(--gold-color);
    text-align: center;
    margin-bottom: var(--spacing-md);
    font-weight: bold;
    line-height: 1.2;
    letter-spacing: 0.05em;
}

.page-khuyen-mai__section-description {
    font-size: 1.1em;
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--spacing-xl);
    color: rgba(255, 245, 225, 0.8);
}

/* Hero Section */
.page-khuyen-mai__hero-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding-top: 10px; /* Small top padding, body handles header offset */
    padding-bottom: var(--spacing-xl);
    background-color: var(--deep-red-color);
    border-bottom: 5px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.page-khuyen-mai__hero-image-container {
    width: 100%;
    max-height: 675px;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
}

.page-khuyen-mai__hero-image {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
    max-height: 675px;
}

.page-khuyen-mai__hero-content {
    text-align: center;
    padding: var(--spacing-lg) var(--spacing-md);
    max-width: 900px;
    margin-top: -80px; /* Overlap slightly for visual effect */
    position: relative;
    z-index: 1;
    background: rgba(0, 0, 0, 0.6);
    border-radius: 15px;
    border: 2px solid var(--border-color);
    box-shadow: 0 0 20px rgba(244, 211, 77, 0.5);
}

.page-khuyen-mai__main-title {
    font-size: clamp(2.2em, 4vw, 3.5em);
    color: var(--gold-color);
    margin-bottom: var(--spacing-md);
    font-weight: 700;
    line-height: 1.2;
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
}

.page-khuyen-mai__intro-text {
    font-size: 1.2em;
    margin-bottom: var(--spacing-lg);
    color: var(--text-main-color);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.page-khuyen-mai__cta-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

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

.page-khuyen-mai__btn-primary {
    background: var(--button-gradient);
    color: var(--deep-red-color);
    border: 2px solid var(--gold-color);
    box-shadow: 0 4px 15px rgba(255, 216, 106, 0.4);
}

.page-khuyen-mai__btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(255, 216, 106, 0.6);
    opacity: 0.9;
}

.page-khuyen-mai__btn-secondary {
    background: transparent;
    color: var(--gold-color);
    border: 2px solid var(--gold-color);
    box-shadow: 0 4px 15px rgba(244, 211, 77, 0.2);
}

.page-khuyen-mai__btn-secondary:hover {
    transform: translateY(-3px);
    background: var(--gold-color);
    color: var(--deep-red-color);
    box-shadow: 0 6px 20px rgba(244, 211, 77, 0.4);
}

/* Why Choose Us Section */
.page-khuyen-mai__why-choose-us-section {
    padding: var(--spacing-xl) 0;
    background-color: var(--background-dark-color);
}

.page-khuyen-mai__features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.page-khuyen-mai__feature-item {
    background-color: var(--card-bg-color);
    padding: var(--spacing-md);
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease;
}

.page-khuyen-mai__feature-item:hover {
    transform: translateY(-5px);
}

.page-khuyen-mai__feature-icon {
    width: 100%;
    max-width: 250px;
    height: auto;
    margin-bottom: var(--spacing-md);
    display: block;
    margin-left: auto;
    margin-right: auto;
    border-radius: 8px;
    object-fit: contain;
}

.page-khuyen-mai__feature-title {
    font-size: 1.8em;
    color: var(--gold-color);
    margin-bottom: 10px;
}

.page-khuyen-mai__feature-text {
    font-size: 1em;
    color: rgba(255, 245, 225, 0.7);
}

/* Promo Types Section */
.page-khuyen-mai__promo-types-section {
    padding: var(--spacing-xl) 0;
    background-color: var(--deep-red-color);
}

.page-khuyen-mai__promo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-lg);
}

.page-khuyen-mai__promo-card {
    background-color: var(--card-bg-color);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.4);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease;
}

.page-khuyen-mai__promo-card:hover {
    transform: translateY(-7px);
}

.page-khuyen-mai__promo-image {
    width: 100%;
    height: 250px; /* Fixed height for consistency */
    object-fit: cover;
    display: block;
}

.page-khuyen-mai__promo-content {
    padding: var(--spacing-md);
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.page-khuyen-mai__promo-title {
    font-size: 1.7em;
    color: var(--gold-color);
    margin-bottom: 10px;
    font-weight: 600;
}

.page-khuyen-mai__promo-text {
    font-size: 1em;
    color: rgba(255, 245, 225, 0.7);
    margin-bottom: var(--spacing-md);
    flex-grow: 1;
}

.page-khuyen-mai__btn-card {
    margin-top: auto; /* Push button to bottom */
    background: var(--button-gradient);
    color: var(--deep-red-color);
    border: 2px solid var(--gold-color);
    box-shadow: 0 4px 10px rgba(255, 216, 106, 0.3);
}

.page-khuyen-mai__btn-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(255, 216, 106, 0.5);
}

/* How To Claim Section */
.page-khuyen-mai__how-to-claim-section {
    padding: var(--spacing-xl) 0;
    background-color: var(--background-dark-color);
}

.page-khuyen-mai__steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.page-khuyen-mai__step-item {
    background-color: var(--card-bg-color);
    padding: var(--spacing-md);
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
}

.page-khuyen-mai__step-number {
    font-size: 2.5em;
    font-weight: bold;
    color: var(--gold-color);
    margin-bottom: 10px;
    background: var(--deep-red-color);
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0 auto 15px;
    border: 2px solid var(--border-color);
}

.page-khuyen-mai__step-title {
    font-size: 1.6em;
    color: var(--gold-color);
    margin-bottom: 10px;
}

.page-khuyen-mai__step-text {
    font-size: 1em;
    color: rgba(255, 245, 225, 0.7);
    margin-bottom: var(--spacing-md);
}

.page-khuyen-mai__step-image {
    width: 100%;
    height: auto;
    max-width: 400px;
    display: block;
    margin: 0 auto;
    border-radius: 8px;
    object-fit: contain;
}

.page-khuyen-mai__cta-bottom {
    text-align: center;
    margin-top: var(--spacing-xl);
}

/* Terms and Conditions Section */
.page-khuyen-mai__terms-conditions-section {
    padding: var(--spacing-xl) 0;
    background-color: var(--deep-red-color);
}

.page-khuyen-mai__terms-list {
    list-style: none;
    padding: 0;
    max-width: 900px;
    margin: var(--spacing-lg) auto;
    background-color: var(--card-bg-color);
    border-radius: 10px;
    border: 1px solid var(--border-color);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

.page-khuyen-mai__terms-item {
    padding: var(--spacing-md);
    border-bottom: 1px solid rgba(242, 181, 68, 0.3);
    color: var(--text-main-color);
    font-size: 1.1em;
}

.page-khuyen-mai__terms-item:last-child {
    border-bottom: none;
}

.page-khuyen-mai__read-more-link {
    text-align: center;
    margin-top: var(--spacing-lg);
}

/* FAQ Section */
.page-khuyen-mai__faq-section {
    padding: var(--spacing-xl) 0;
    background-color: var(--background-dark-color);
}

.page-khuyen-mai__faq-list {
    max-width: 900px;
    margin: var(--spacing-lg) auto;
}

.page-khuyen-mai__faq-item {
    background-color: var(--card-bg-color);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    margin-bottom: 15px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
}

.page-khuyen-mai__faq-item[open] {
    background-color: var(--deep-red-color);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.4);
}

.page-khuyen-mai__faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    font-size: 1.2em;
    font-weight: bold;
    color: var(--gold-color);
    cursor: pointer;
    list-style: none; /* Remove default marker */
}

.page-khuyen-mai__faq-question::-webkit-details-marker {
    display: none;
}

.page-khuyen-mai__faq-toggle {
    font-size: 1.5em;
    line-height: 1;
    margin-left: 10px;
    color: var(--gold-color);
}

.page-khuyen-mai__faq-answer {
    padding: 0 var(--spacing-md) var(--spacing-md);
    font-size: 1em;
    color: var(--text-main-color);
}

/* Final CTA Section */
.page-khuyen-mai__cta-final-section {
    padding: var(--spacing-xl) 0;
    text-align: center;
    background-color: var(--deep-red-color);
    border-top: 5px solid var(--border-color);
}

/* General Image Styling */
.page-khuyen-mai img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Responsive Styles */
@media (max-width: 1024px) {
    .page-khuyen-mai__section-title {
        font-size: 2.5em;
    }

    .page-khuyen-mai__hero-content {
        margin-top: -60px;
        padding: var(--spacing-md);
    }

    .page-khuyen-mai__main-title {
        font-size: clamp(2em, 4vw, 3em);
    }

    .page-khuyen-mai__promo-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }
}

@media (max-width: 768px) {
    .page-khuyen-mai__container {
        padding: 0 15px;
    }

    .page-khuyen-mai__section-title {
        font-size: 2em;
        margin-bottom: var(--spacing-md);
    }

    .page-khuyen-mai__section-description {
        font-size: 1em;
        margin-bottom: var(--spacing-lg);
    }

    .page-khuyen-mai__hero-section {
        padding-bottom: var(--spacing-lg);
    }

    .page-khuyen-mai__hero-image-container {
        max-height: 400px;
    }

    .page-khuyen-mai__hero-image {
        object-fit: contain !important; /* Mobile: contain, not cover */
        max-height: none !important; /* Remove max-height for mobile */
        aspect-ratio: unset !important; /* Remove aspect-ratio for mobile */
    }

    .page-khuyen-mai__hero-content {
        margin-top: -40px; /* Adjust overlap */
        padding: var(--spacing-md) 15px;
    }

    .page-khuyen-mai__main-title {
        font-size: clamp(1.8em, 5vw, 2.5em);
    }

    .page-khuyen-mai__intro-text {
        font-size: 1em;
    }

    .page-khuyen-mai__cta-buttons {
        flex-direction: column;
        gap: 10px;
    }

    .page-khuyen-mai__btn-primary,
    .page-khuyen-mai__btn-secondary,
    .page-khuyen-mai__btn-card {
        width: 100% !important;
        max-width: 100% !important;
        padding: 12px 20px;
        font-size: 1em;
        white-space: normal !important;
        word-wrap: break-word !important;
    }

    /* General Image & Container for mobile */
    .page-khuyen-mai img {
        max-width: 100% !important;
        width: 100% !important;
        height: auto !important;
    }
    
    .page-khuyen-mai__hero-section,
    .page-khuyen-mai__why-choose-us-section,
    .page-khuyen-mai__promo-types-section,
    .page-khuyen-mai__how-to-claim-section,
    .page-khuyen-mai__terms-conditions-section,
    .page-khuyen-mai__faq-section,
    .page-khuyen-mai__cta-final-section {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        padding-left: 15px;
        padding-right: 15px;
    }

    .page-khuyen-mai__features-grid,
    .page-khuyen-mai__promo-grid,
    .page-khuyen-mai__steps-grid {
        grid-template-columns: 1fr; /* Single column layout */
        gap: var(--spacing-md);
    }

    .page-khuyen-mai__feature-item,
    .page-khuyen-mai__promo-card,
    .page-khuyen-mai__step-item {
        padding: var(--spacing-md);
    }

    .page-khuyen-mai__promo-image {
        height: 200px; /* Adjust height for mobile cards */
    }

    .page-khuyen-mai__faq-question {
        font-size: 1.1em;
        padding: 15px;
    }

    .page-khuyen-mai__faq-answer {
        padding: 0 15px 15px;
    }
}

/* Ensure color contrast for main text against assumed dark body background */
.page-khuyen-mai p,
.page-khuyen-mai li,
.page-khuyen-mai__section-description,
.page-khuyen-mai__intro-text,
.page-khuyen-mai__feature-text,
.page-khuyen-mai__promo-text,
.page-khuyen-mai__step-text,
.page-khuyen-mai__faq-answer {
    color: var(--text-main-color); /* #FFF5E1 for dark background */
}

.page-khuyen-mai__card-bg {
    background: var(--card-bg-color);
    color: var(--text-main-color);
}

.page-khuyen-mai__dark-section {
    background: var(--deep-red-color);
    color: var(--text-main-color);
}