/* style/khuyen-mai.css */

:root {
    --primary-color: #2F6BFF;
    --secondary-color: #6FA3FF;
    --button-gradient: linear-gradient(180deg, #4A8BFF 0%, #2F6BFF 100%);
    --card-bg: #FFFFFF;
    --page-bg: #F4F7FB;
    --text-main: #1F2D3D;
    --text-dark: #000000;
    --border-color: #D6E2FF;
    --glow-color: #A5C4FF;
    --white-text: #ffffff;
    --header-offset: 122px; /* Default value, assumed from shared.css */
}

.page-khuyen-mai {
    font-family: 'Arial', sans-serif;
    color: var(--text-main);
    background-color: var(--page-bg);
    line-height: 1.6;
    padding-bottom: 40px;
}

.page-khuyen-mai__container {
    max-width: 1150px;
    margin: 0 auto;
    padding: 0 20px;
    box-sizing: border-box;
}

/* Top Section / Hero Section */
.page-khuyen-mai__hero-section {
    position: relative;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding-top: 10px; /* Small top padding, relies on body padding-top for header offset */
    background-color: var(--primary-color);
    overflow: hidden;
}

.page-khuyen-mai__hero-image-wrap {
    width: 100%;
    max-height: 600px; /* Adjust height as needed */
    overflow: hidden;
}

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

.page-khuyen-mai__hero-content {
    padding: 40px 20px;
    text-align: center;
    color: var(--white-text);
    max-width: 900px;
    margin-top: -120px; /* Adjust to overlap slightly with image below */
    position: relative;
    z-index: 1;
    background: linear-gradient(to top, var(--primary-color) 0%, rgba(47, 107, 255, 0.8) 50%, rgba(47, 107, 255, 0) 100%);
    border-radius: 15px;
    margin-bottom: 40px;
}

.page-khuyen-mai__main-title {
    font-size: clamp(2.2rem, 4vw, 3.2rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
    color: var(--white-text);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.page-khuyen-mai__hero-description {
    font-size: 1.1rem;
    margin-bottom: 30px;
    opacity: 0.9;
}

.page-khuyen-mai__hero-cta {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
}

/* General Section Styles */
.page-khuyen-mai__section {
    padding: 60px 0;
}

.page-khuyen-mai__section-title {
    font-size: clamp(1.8rem, 3.5vw, 2.5rem);
    font-weight: 700;
    color: var(--text-dark);
    text-align: center;
    margin-bottom: 40px;
    line-height: 1.3;
}

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

.page-khuyen-mai__text-block {
    font-size: 1rem;
    line-height: 1.7;
    margin-bottom: 20px;
    text-align: justify;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

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

/* Buttons */
.page-khuyen-mai__btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    white-space: normal;
    word-wrap: break-word;
    max-width: 100%;
    box-sizing: border-box;
    text-align: center;
}

.page-khuyen-mai__btn-primary {
    background: var(--button-gradient);
    color: var(--white-text);
    border: 2px solid transparent;
    box-shadow: 0 4px 15px rgba(47, 107, 255, 0.4);
}

.page-khuyen-mai__btn-primary:hover {
    box-shadow: 0 6px 20px rgba(47, 107, 255, 0.6);
    transform: translateY(-2px);
}

.page-khuyen-mai__btn-secondary {
    background: var(--card-bg);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.page-khuyen-mai__btn-secondary:hover {
    background: var(--primary-color);
    color: var(--white-text);
    box-shadow: 0 4px 12px rgba(47, 107, 255, 0.3);
    transform: translateY(-2px);
}

/* Promo Categories Grid */
.page-khuyen-mai__promo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.page-khuyen-mai__promo-card {
    background-color: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    padding: 30px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.page-khuyen-mai__promo-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.page-khuyen-mai__card-image {
    width: 100%;
    height: 220px; /* Fixed height for consistency */
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 25px;
    display: block;
    min-width: 200px; /* Minimum size requirement */
    min-height: 200px;
}

.page-khuyen-mai__card-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 15px;
    line-height: 1.3;
}

.page-khuyen-mai__card-description {
    font-size: 0.95rem;
    color: var(--text-main);
    margin-bottom: 25px;
    flex-grow: 1;
    text-align: justify;
}

.page-khuyen-mai__card-btn {
    margin-top: auto; /* Push button to bottom */
    width: 100%;
}

/* How to Claim Section */
.page-khuyen-mai__image-figure {
    margin: 40px auto;
    max-width: 800px;
    text-align: center;
}

.page-khuyen-mai__content-image {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    min-width: 200px;
    min-height: 200px;
}

.page-khuyen-mai__image-caption {
    font-size: 0.9rem;
    color: var(--text-main);
    margin-top: 15px;
    opacity: 0.8;
}

.page-khuyen-mai__step-list {
    list-style: none;
    padding: 0;
    counter-reset: step-counter;
    max-width: 900px;
    margin: 0 auto 40px auto;
}

.page-khuyen-mai__step-item {
    counter-increment: step-counter;
    margin-bottom: 20px;
    padding-left: 50px;
    position: relative;
    font-size: 1.05rem;
    line-height: 1.7;
}

.page-khuyen-mai__step-item::before {
    content: counter(step-counter);
    position: absolute;
    left: 0;
    top: 0;
    width: 35px;
    height: 35px;
    background-color: var(--primary-color);
    color: var(--white-text);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
    box-shadow: 0 2px 8px rgba(47, 107, 255, 0.4);
}

.page-khuyen-mai__cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 40px;
    flex-wrap: wrap;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    overflow: hidden;
}

/* Terms & Conditions */
.page-khuyen-mai__info-list {
    list-style: disc;
    padding-left: 25px;
    max-width: 900px;
    margin: 0 auto 30px auto;
}

.page-khuyen-mai__list-item {
    margin-bottom: 10px;
    font-size: 1rem;
    line-height: 1.7;
}

.page-khuyen-mai__warning-text {
    font-size: 1rem;
    color: #cc0000; /* Red for warning */
    font-weight: 600;
    text-align: center;
}

/* Why Choose Section */
.page-khuyen-mai__feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.page-khuyen-mai__feature-item {
    background-color: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    padding: 30px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border-top: 5px solid var(--primary-color);
}

.page-khuyen-mai__feature-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.12);
}

.page-khuyen-mai__feature-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.page-khuyen-mai__feature-description {
    font-size: 0.95rem;
    color: var(--text-main);
    line-height: 1.6;
}

/* FAQ Section */
.page-khuyen-mai__faq-list {
    max-width: 900px;
    margin: 40px auto 0 auto;
}

.page-khuyen-mai__faq-item {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 15px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.page-khuyen-mai__faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 25px;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-dark);
    cursor: pointer;
    list-style: none; /* For details/summary */
}

.page-khuyen-mai__faq-question::-webkit-details-marker, /* Hide default marker */
.page-khuyen-mai__faq-question::marker {
    display: none;
}

.page-khuyen-mai__faq-qtext {
    flex-grow: 1;
}

.page-khuyen-mai__faq-toggle {
    font-size: 1.8rem;
    font-weight: 500;
    line-height: 1;
    margin-left: 15px;
    transition: transform 0.3s ease;
    color: var(--primary-color);
}

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

.page-khuyen-mai__faq-answer {
    padding: 0 25px 20px 25px;
    font-size: 1rem;
    color: var(--text-main);
    line-height: 1.7;
}

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

/* Final CTA Section */
.page-khuyen-mai__final-cta {
    background: var(--primary-color);
    padding: 80px 0;
    text-align: center;
}

.page-khuyen-mai__final-cta-content {
    max-width: 900px;
}

/* --- Responsive Styles --- */

/* Desktop/Tablet (max-width: 1024px) - General adjustments */
@media (max-width: 1024px) {
    .page-khuyen-mai__hero-content {
        margin-top: -80px;
        padding: 30px 20px;
    }

    .page-khuyen-mai__section {
        padding: 50px 0;
    }

    .page-khuyen-mai__promo-grid,
    .page-khuyen-mai__feature-grid {
        gap: 25px;
    }

    .page-khuyen-mai__card-image {
        height: 200px;
    }

    .page-khuyen-mai__promo-card,
    .page-khuyen-mai__feature-item {
        padding: 25px;
    }

    .page-khuyen-mai__faq-question {
        padding: 18px 20px;
    }

    .page-khuyen-mai__faq-answer {
        padding: 0 20px 18px 20px;
    }
}

/* Mobile (max-width: 768px) - Must include all required sections */
@media (max-width: 768px) {
    /* 1. Top Section / Hero Section */
    .page-khuyen-mai__hero-section {
        padding-top: 10px !important; /* Small top padding for mobile */
    }

    .page-khuyen-mai__hero-image-wrap {
        max-height: 300px;
    }

    .page-khuyen-mai__hero-content {
        margin-top: -60px; /* Smaller overlap */
        padding: 25px 15px;
        border-radius: 10px;
        margin-bottom: 20px;
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
    }

    .page-khuyen-mai__main-title {
        font-size: 1.8rem !important;
        margin-bottom: 15px;
    }

    .page-khuyen-mai__hero-description {
        font-size: 0.95rem;
        margin-bottom: 20px;
    }

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

    /* 2. Single-Column Long Text (General sections) */
    .page-khuyen-mai__section {
        padding: 40px 0;
    }

    .page-khuyen-mai__container {
        padding-left: 15px !important;
        padding-right: 15px !important;
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
    }

    .page-khuyen-mai__section-title {
        font-size: 1.5rem !important;
        margin-bottom: 30px;
    }

    .page-khuyen-mai__text-block {
        font-size: 0.95rem;
    }

    /* Promo Categories Grid */
    .page-khuyen-mai__promo-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .page-khuyen-mai__promo-card {
        padding: 20px;
    }

    .page-khuyen-mai__card-title {
        font-size: 1.3rem;
    }

    /* How to Claim Section */
    .page-khuyen-mai__image-figure {
        margin: 30px auto;
    }

    /* 3. General Images and Figure */
    .page-khuyen-mai img {
        max-width: 100% !important;
        width: 100% !important;
        height: auto !important;
    }

    .page-khuyen-mai__card-image,
    .page-khuyen-mai__content-image {
        min-width: 200px !important;
        min-height: 200px !important;
        height: auto !important;
    }

    .page-khuyen-mai__image-caption {
        font-size: 0.85rem;
    }

    .page-khuyen-mai__step-item {
        font-size: 0.95rem;
        padding-left: 45px;
    }

    .page-khuyen-mai__step-item::before {
        width: 30px;
        height: 30px;
        font-size: 1rem;
    }

    /* Terms & Conditions */
    .page-khuyen-mai__info-list {
        padding-left: 20px;
    }

    .page-khuyen-mai__list-item {
        font-size: 0.95rem;
    }

    .page-khuyen-mai__warning-text {
        font-size: 0.95rem;
    }

    /* Why Choose Section */
    .page-khuyen-mai__feature-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .page-khuyen-mai__feature-item {
        padding: 25px;
    }

    .page-khuyen-mai__feature-title {
        font-size: 1.2rem;
    }

    .page-khuyen-mai__feature-description {
        font-size: 0.9rem;
    }

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

    .page-khuyen-mai__faq-toggle {
        font-size: 1.5rem;
    }

    .page-khuyen-mai__faq-answer {
        font-size: 0.95rem;
        padding: 0 20px 15px 20px;
    }

    /* Final CTA Section */
    .page-khuyen-mai__final-cta {
        padding: 60px 0;
    }

    .page-khuyen-mai__final-cta-content {
        padding-left: 15px !important;
        padding-right: 15px !important;
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
    }

    /* 4. Buttons and Button Containers */
    .page-khuyen-mai__btn,
    .page-khuyen-mai__btn-primary,
    .page-khuyen-mai__btn-secondary,
    .page-khuyen-mai a[class*="button"],
    .page-khuyen-mai 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-left: 15px;
        padding-right: 15px;
    }

    .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;
        flex-wrap: wrap !important;
        gap: 10px;
        flex-direction: column;
    }
}

/* Ensure contrast for various backgrounds */
.page-khuyen-mai__dark-bg {
    background-color: var(--primary-color);
    color: var(--white-text);
}

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

.page-khuyen-mai__promo-card .page-khuyen-mai__card-title {
    color: var(--text-dark); /* Ensure dark text on light card background */
}

.page-khuyen-mai__faq-item .page-khuyen-mai__faq-question .page-khuyen-mai__faq-qtext {
    color: var(--text-dark); /* Ensure dark text on light FAQ summary */
}