/* 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-black: #000000;
    --border-color: #D6E2FF;
    --glow-color: #A5C4FF;
    --white-text: #ffffff;
    --dark-text: #333333;
    --small-padding: 10px;
}

.page-khuyen-mai {
    font-family: Arial, sans-serif;
    color: var(--text-main); /* Default text color for the page */
    background-color: var(--page-bg); /* Page background from custom colors */
    line-height: 1.6;
}

.page-khuyen-mai__article-wrap {
    max-width: 1150px;
    margin: 0 auto;
    padding: 20px;
}

.page-khuyen-mai__hero-section {
    position: relative;
    padding-top: var(--small-padding); /* Rely on body padding-top from shared.css, use small padding here */
    padding-bottom: 40px;
    text-align: center;
    overflow: hidden;
    background-color: var(--primary-color);
}

.page-khuyen-mai__hero-image-wrapper {
    width: 100%;
    max-height: 700px;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
}

.page-khuyen-mai__hero-image {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
    filter: brightness(0.7); /* Darken image slightly for text readability */
}

.page-khuyen-mai__hero-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 2;
    color: var(--white-text);
    max-width: 900px;
    padding: 20px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

.page-khuyen-mai__main-title {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 700;
    margin-bottom: 15px;
    line-height: 1.2;
    color: var(--white-text);
}

.page-khuyen-mai__description {
    font-size: 1.15rem;
    margin-bottom: 30px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    color: var(--white-text);
}

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

.page-khuyen-mai__btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    white-space: normal; /* Allow text wrapping */
    word-wrap: break-word; /* Allow text wrapping */
    box-sizing: border-box;
    max-width: 100%;
}

.page-khuyen-mai__btn-primary {
    background: var(--button-gradient);
    color: var(--white-text);
    border: 2px solid transparent;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.page-khuyen-mai__btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.page-khuyen-mai__btn-secondary {
    background: var(--card-bg);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.page-khuyen-mai__btn-secondary:hover {
    background: var(--primary-color);
    color: var(--white-text);
    transform: translateY(-2px);
}

.page-khuyen-mai__section {
    padding: 40px 0;
    background-color: var(--page-bg);
}

.page-khuyen-mai__section-title {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    color: var(--text-main);
    text-align: center;
    margin-bottom: 30px;
    font-weight: 700;
}

.page-khuyen-mai__intro-promo p,
.page-khuyen-mai__terms-conditions p,
.page-khuyen-mai__how-to-claim p,
.page-khuyen-mai__conclusion p {
    font-size: 1rem;
    margin-bottom: 15px;
    color: var(--text-main);
}

.page-khuyen-mai__figure {
    margin: 30px auto;
    text-align: center;
    max-width: 100%;
}

.page-khuyen-mai__image {
    max-width: 100%;
    height: auto;
    display: block;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    margin: 0 auto;
}

.page-khuyen-mai__figcaption {
    font-size: 0.9rem;
    color: var(--dark-text);
    margin-top: 10px;
}

.page-khuyen-mai__promo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.page-khuyen-mai__promo-card {
    background-color: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
    padding: 25px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    color: var(--text-main);
}

.page-khuyen-mai__promo-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.page-khuyen-mai__card-image {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin-bottom: 20px;
    display: block;
    margin-left: auto;
    margin-right: auto;
}

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

.page-khuyen-mai__promo-card p {
    font-size: 0.95rem;
    color: var(--text-main);
    margin-bottom: 20px;
    flex-grow: 1;
}

.page-khuyen-mai__btn-small {
    padding: 8px 18px;
    font-size: 0.9rem;
    border-radius: 6px;
}

.page-khuyen-mai__list,
.page-khuyen-mai__steps-list {
    list-style-type: disc;
    padding-left: 25px;
    margin-bottom: 20px;
    color: var(--text-main);
}

.page-khuyen-mai__steps-list {
    list-style-type: decimal;
}

.page-khuyen-mai__list li,
.page-khuyen-mai__steps-list li {
    margin-bottom: 10px;
    font-size: 1rem;
    color: var(--text-main);
}

.page-khuyen-mai__list strong,
.page-khuyen-mai__steps-list strong {
    color: var(--text-black);
}

.page-khuyen-mai__link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

.page-khuyen-mai__link:hover {
    text-decoration: underline;
}

.page-khuyen-mai__cta-buttons--center {
    margin-top: 40px;
    margin-bottom: 20px;
}

.page-khuyen-mai__cta-buttons--bottom {
    margin-top: 40px;
}

.page-khuyen-mai__faq-list {
    margin-top: 30px;
}

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

.page-khuyen-mai__faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 25px;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-black);
    cursor: pointer;
    list-style: none; /* Hide default marker for details summary */
}

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

.page-khuyen-mai__faq-toggle {
    font-size: 1.5rem;
    line-height: 1;
    transition: transform 0.3s ease;
}

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

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

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

.page-khuyen-mai__copyright {
    text-align: center;
    padding: 20px;
    font-size: 0.9rem;
    color: var(--text-main);
    background-color: var(--page-bg);
}

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

@media (max-width: 1024px) {
    .page-khuyen-mai__article-wrap {
        padding: 0 15px;
    }

    .page-khuyen-mai__hero-content {
        max-width: 80%;
    }

    .page-khuyen-mai__main-title {
        font-size: clamp(2rem, 4.5vw, 3rem);
    }

    .page-khuyen-mai__description {
        font-size: 1.05rem;
    }

    .page-khuyen-mai__promo-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 20px;
    }

    .page-khuyen-mai__section-title {
        font-size: clamp(1.6rem, 3.5vw, 2.2rem);
    }
}

@media (max-width: 768px) {
    /* 1. Top Section (Hero) */
    .page-khuyen-mai__hero-section {
        padding-top: var(--small-padding) !important; /* Small padding, rely on body for header offset */
        padding-bottom: 30px;
    }

    .page-khuyen-mai__hero-content {
        position: static;
        transform: none;
        padding: 20px 15px;
        background-color: rgba(0, 0, 0, 0.5); /* Add background for readability on smaller screens */
        width: 100%;
        box-sizing: border-box;
    }

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

    .page-khuyen-mai__main-title {
        font-size: 1.8rem !important;
        margin-bottom: 10px;
    }

    .page-khuyen-mai__description {
        font-size: 1rem !important;
        margin-bottom: 20px;
    }

    /* 2. Single Column Content Area (article-wrap, section, promo-box, info-card, warning-card) */
    .page-khuyen-mai__article-wrap {
        padding-left: 15px !important;
        padding-right: 15px !important;
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
    }

    .page-khuyen-mai__section {
        padding: 25px 0;
    }

    .page-khuyen-mai__section-title {
        font-size: 1.5rem !important;
        margin-bottom: 20px;
    }

    .page-khuyen-mai__intro-promo p,
    .page-khuyen-mai__terms-conditions p,
    .page-khuyen-mai__how-to-claim p,
    .page-khuyen-mai__conclusion p {
        font-size: 0.95rem;
    }

    .page-khuyen-mai__promo-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

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

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

    .page-khuyen-mai__figure {
        margin: 20px auto;
        width: 100%;
        box-sizing: border-box;
    }

    .page-khuyen-mai__image,
    .page-khuyen-mai__card-image {
        width: 100% !important;
        height: auto !important;
    }

    /* 4. Buttons and Button Containers */
    .page-khuyen-mai__cta-buttons {
        flex-direction: column;
        gap: 10px;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
        padding-left: 15px;
        padding-right: 15px;
    }

    .page-khuyen-mai__btn {
        max-width: 100% !important;
        width: 100% !important;
        padding: 12px 15px;
        font-size: 1rem;
        white-space: normal !important;
        word-wrap: break-word !important;
        box-sizing: border-box !important;
    }

    .page-khuyen-mai__cta-buttons--center,
    .page-khuyen-mai__cta-buttons--bottom {
        padding-left: 0 !important;
        padding-right: 0 !important;
    }

    /* 5. Registration Tutorial and FAQ Blocks */
    .page-khuyen-mai__list,
    .page-khuyen-mai__steps-list {
        padding-left: 20px;
    }

    .page-khuyen-mai__list li,
    .page-khuyen-mai__steps-list li {
        font-size: 0.95rem;
    }

    .page-khuyen-mai__faq-question {
        padding: 15px 20px;
        font-size: 1rem;
    }

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

    .page-khuyen-mai__copyright {
        padding: 15px;
        font-size: 0.85rem;
    }
}