/* style/khuyen-mai.css */

:root {
    --primary-color: #E53935;
    --secondary-color: #FF5A4F;
    --text-main-color: #333333;
    --card-bg-color: #FFFFFF;
    --background-color: #F5F7FA;
    --border-color: #E0E0E0;
}

.page-khuyen-mai {
    font-family: 'Arial', sans-serif;
    color: var(--text-main-color);
    background-color: var(--background-color);
}

/* General container and section styling */
.page-khuyen-mai__container {
    max-width: 1170px;
    margin: 0 auto;
    padding: 40px 16px;
    box-sizing: border-box;
}

.page-khuyen-mai__section-title {
    font-size: 2.5em;
    font-weight: 700;
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 20px;
    line-height: 1.2;
}

.page-khuyen-mai__section-description {
    font-size: 1.1em;
    color: var(--text-main-color);
    text-align: center;
    max-width: 800px;
    margin: 0 auto 40px;
    line-height: 1.6;
}

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

.page-khuyen-mai__btn-primary {
    background: linear-gradient(180deg, var(--secondary-color) 0%, var(--primary-color) 100%);
    color: #ffffff;
    border: none;
}

.page-khuyen-mai__btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-2px);
}

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

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

.page-khuyen-mai__btn-tertiary {
    background: none;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
    padding: 10px 20px;
    font-size: 0.9em;
}

.page-khuyen-mai__btn-tertiary:hover {
    background: var(--primary-color);
    color: #ffffff;
}

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

/* HERO Section */
.page-khuyen-mai__hero-section {
    padding-top: 10px; /* Small top padding, body handles --header-offset */
    padding-bottom: 60px;
    background-color: var(--background-color);
}

.page-khuyen-mai__hero-container {
    max-width: 1170px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 40px;
    padding: 40px 16px;
}

.page-khuyen-mai__hero-content {
    flex: 1 1 45%;
    min-width: 300px;
    color: var(--text-main-color);
}

.page-khuyen-mai__hero-title {
    font-size: clamp(2em, 4vw, 3.2em); /* Use clamp for H1 */
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 20px;
    line-height: 1.2;
}

.page-khuyen-mai__hero-description {
    font-size: 1.15em;
    line-height: 1.7;
    margin-bottom: 30px;
}

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

.page-khuyen-mai__hero-image {
    flex: 1 1 45%;
    min-width: 300px;
    text-align: center;
}

.page-khuyen-mai__hero-side-image {
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

/* Intro Section (Module 1 - 3 columns with round images) */
.page-khuyen-mai__intro-section {
    background-color: var(--card-bg-color);
    padding-top: 60px;
    padding-bottom: 60px;
}

.page-khuyen-mai__icon-box-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.page-khuyen-mai__icon-box {
    background-color: var(--card-bg-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease;
}

.page-khuyen-mai__icon-box:hover {
    transform: translateY(-5px);
}

.page-khuyen-mai__icon-box-media {
    width: 240px;
    height: 240px;
    aspect-ratio: 1 / 1;
    margin: 0 auto 25px;
    border-radius: 50%;
    overflow: hidden;
    border: 4px solid var(--primary-color);
    box-shadow: 0 0 0 5px rgba(229, 57, 53, 0.2);
}

.page-khuyen-mai__icon-box-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%; /* Ensure roundness */
}

.page-khuyen-mai__icon-box-title {
    font-size: 1.5em;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.page-khuyen-mai__icon-box-text {
    font-size: 1em;
    line-height: 1.6;
    color: var(--text-main-color);
    margin-bottom: 25px;
}

/* Promo Details Section */
.page-khuyen-mai__promo-details-section {
    background-color: var(--background-color);
    padding-top: 60px;
    padding-bottom: 60px;
}

.page-khuyen-mai__promo-card {
    display: flex;
    flex-wrap: wrap;
    background-color: var(--card-bg-color);
    border-radius: 12px;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
    margin-bottom: 40px;
    overflow: hidden;
}

.page-khuyen-mai__promo-card:nth-child(even) {
    flex-direction: row-reverse; /* Alternate layout */
}

.page-khuyen-mai__promo-image {
    flex: 1 1 50%;
    min-width: 300px;
    height: auto;
    object-fit: cover;
}

.page-khuyen-mai__promo-content {
    flex: 1 1 50%;
    min-width: 300px;
    padding: 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.page-khuyen-mai__promo-title {
    font-size: 2em;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 15px;
    line-height: 1.3;
}

.page-khuyen-mai__promo-text {
    font-size: 1.1em;
    line-height: 1.7;
    color: var(--text-main-color);
    margin-bottom: 20px;
}

.page-khuyen-mai__promo-terms {
    font-size: 0.9em;
    color: #666;
    margin-bottom: 25px;
    font-style: italic;
}

/* Guide Section */
.page-khuyen-mai__guide-section {
    background-color: var(--card-bg-color);
    padding-top: 60px;
    padding-bottom: 60px;
}

.page-khuyen-mai__guide-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.page-khuyen-mai__guide-step {
    background-color: var(--background-color);
    border-radius: 12px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.page-khuyen-mai__step-icon {
    width: 60px;
    height: 60px;
    line-height: 60px;
    background-color: var(--primary-color);
    color: #ffffff;
    font-size: 1.8em;
    font-weight: 700;
    border-radius: 50%;
    margin: 0 auto 20px;
}

.page-khuyen-mai__step-title {
    font-size: 1.4em;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 10px;
}

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

.page-khuyen-mai__guide-cta {
    text-align: center;
    margin-top: 50px;
}

/* FAQ Section */
.page-khuyen-mai__faq-section {
    background-color: var(--background-color);
    padding-top: 60px;
    padding-bottom: 60px;
}

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

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

.page-khuyen-mai__faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 25px;
    font-size: 1.15em;
    font-weight: 600;
    color: var(--primary-color);
    cursor: pointer;
    background-color: #f9f9f9;
    border-bottom: 1px solid var(--border-color);
    list-style: none; /* Hide default marker for <summary> */
}

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

.page-khuyen-mai__faq-toggle {
    font-size: 1.5em;
    font-weight: 700;
    color: var(--primary-color);
    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: 20px 25px;
    font-size: 1em;
    line-height: 1.6;
    color: var(--text-main-color);
    border-top: 1px solid var(--border-color);
    margin-top: -1px; /* Overlap border with summary for clean look */
}

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

/* Final CTA Section */
.page-khuyen-mai__cta-section {
    background: linear-gradient(90deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    padding-top: 80px;
    padding-bottom: 80px;
    text-align: center;
}

.page-khuyen-mai__cta-container {
    max-width: 900px;
    padding: 0 16px;
}

.page-khuyen-mai__cta-title {
    font-size: clamp(1.8em, 3.5vw, 2.8em);
    font-weight: 800;
    color: #ffffff;
    margin-bottom: 20px;
    line-height: 1.2;
}

.page-khuyen-mai__cta-description {
    font-size: 1.15em;
    line-height: 1.7;
    color: #f0f0f0;
    max-width: 700px;
    margin: 0 auto 40px;
}

/* Responsive Styles */
@media (max-width: 1024px) {
    .page-khuyen-mai__hero-container,
    .page-khuyen-mai__promo-card {
        flex-direction: column;
        text-align: center;
    }

    .page-khuyen-mai__hero-content,
    .page-khuyen-mai__hero-image,
    .page-khuyen-mai__promo-image,
    .page-khuyen-mai__promo-content {
        flex: 1 1 100%;
    }

    .page-khuyen-mai__promo-card:nth-child(even) {
        flex-direction: column; /* Reset alternate layout for smaller screens */
    }

    .page-khuyen-mai__promo-content {
        padding: 30px;
    }

    .page-khuyen-mai__icon-box-media {
        width: 200px;
        height: 200px;
    }
}

@media (max-width: 768px) {
    .page-khuyen-mai {
        font-size: 16px;
        line-height: 1.6;
    }

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

    /* HERO Section */
    .page-khuyen-mai__hero-section {
        padding-top: 10px !important;
        padding-bottom: 40px !important;
    }

    .page-khuyen-mai__hero-title {
        font-size: 2em !important;
        margin-bottom: 15px !important;
    }

    .page-khuyen-mai__hero-description {
        font-size: 1em !important;
        margin-bottom: 25px !important;
    }

    .page-khuyen-mai__hero-cta-group {
        flex-direction: column !important;
        gap: 10px !important;
    }

    /* Buttons */
    .page-khuyen-mai__btn-primary,
    .page-khuyen-mai__btn-secondary,
    .page-khuyen-mai__btn-tertiary {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        white-space: normal !important;
        word-wrap: break-word !important;
        padding-left: 15px !important;
        padding-right: 15px !important;
    }

    /* Intro Section (Module 1 - Round Images) */
    .page-khuyen-mai__icon-box-grid {
        grid-template-columns: 1fr !important;
    }

    .page-khuyen-mai__icon-box-media {
        width: 180px !important;
        height: 180px !important;
        margin-bottom: 20px !important;
    }

    .page-khuyen-mai__icon-box-title {
        font-size: 1.3em !important;
    }

    /* Promo Details Section */
    .page-khuyen-mai__promo-card {
        margin-bottom: 30px !important;
    }

    .page-khuyen-mai__promo-image {
        height: 200px !important; /* Fixed height for mobile promo images */
        object-fit: cover !important;
    }

    .page-khuyen-mai__promo-content {
        padding: 25px !important;
    }

    .page-khuyen-mai__promo-title {
        font-size: 1.5em !important;
    }

    .page-khuyen-mai__promo-text {
        font-size: 0.95em !important;
    }

    /* Guide Section */
    .page-khuyen-mai__guide-steps {
        grid-template-columns: 1fr !important;
    }

    .page-khuyen-mai__guide-step {
        padding: 25px !important;
    }

    /* FAQ Section */
    .page-khuyen-mai__faq-list {
        margin-top: 30px !important;
    }

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

    .page-khuyen-mai__faq-answer {
        padding: 15px 20px !important;
        font-size: 0.9em !important;
    }

    /* Final CTA Section */
    .page-khuyen-mai__cta-section {
        padding-top: 60px !important;
        padding-bottom: 60px !important;
    }

    .page-khuyen-mai__cta-title {
        font-size: 1.8em !important;
    }

    .page-khuyen-mai__cta-description {
        font-size: 1em !important;
        margin-bottom: 30px !important;
    }

    /* General Images and Containers */
    .page-khuyen-mai img:not(.page-khuyen-mai__icon-box-media img) {
        max-width: 100% !important;
        width: 100% !important;
        height: auto !important;
    }

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