/* General Styles for Khuyến Mãi Page */
.page-khuyen-mai {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-main, #F3F8FF); /* Default text color for the page */
    background-color: var(--deep-navy, #08162B); /* Ensure dark background */
}

.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: bold;
    color: var(--text-main, #F3F8FF);
    text-align: center;
    margin-bottom: 20px;
}

.page-khuyen-mai__section-description {
    font-size: 1.1em;
    color: var(--text-secondary, #AFC4E8);
    text-align: center;
    max-width: 800px;
    margin: 0 auto 40px;
}

.page-khuyen-mai__btn-primary,
.page-khuyen-mai__btn-secondary,
.page-khuyen-mai__btn-small {
    display: inline-block;
    padding: 12px 25px;
    border-radius: 8px;
    font-weight: bold;
    text-decoration: none;
    transition: background-color 0.3s ease, transform 0.2s ease;
    text-align: center;
    box-sizing: border-box;
    white-space: normal;
    word-wrap: break-word;
    max-width: 100%;
}

.page-khuyen-mai__btn-primary {
    background: linear-gradient(180deg, #2B73F6 0%, #1144A6 100%);
    color: var(--text-main, #F3F8FF);
    border: none;
}

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

.page-khuyen-mai__btn-secondary {
    background: transparent;
    color: var(--text-main, #F3F8FF);
    border: 2px solid var(--border-color, #244D84);
}

.page-khuyen-mai__btn-secondary:hover {
    transform: translateY(-2px);
    background: var(--border-color, #244D84);
    opacity: 0.9;
}

.page-khuyen-mai__btn-small {
    padding: 8px 15px;
    font-size: 0.9em;
    border-radius: 5px;
    background: linear-gradient(180deg, #2B73F6 0%, #1144A6 100%);
    color: var(--text-main, #F3F8FF);
    border: none;
}

.page-khuyen-mai__btn-small:hover {
    transform: translateY(-1px);
    opacity: 0.9;
}

.page-khuyen-mai__inline-link {
    color: var(--auxiliary-color, #1D5FD1);
    text-decoration: underline;
}

.page-khuyen-mai__inline-link:hover {
    color: var(--glow-color, #4FA8FF);
}

/* HERO Section */
.page-khuyen-mai__hero-section {
    padding-top: 10px; /* Small top padding, relying on body padding for header offset */
    padding-bottom: 60px;
    background-color: var(--deep-navy, #08162B);
}

.page-khuyen-mai__hero-container {
    max-width: 1170px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    padding: 40px 16px;
    gap: 30px;
}

.page-khuyen-mai__hero-content {
    flex: 1 1 50%;
    min-width: 300px;
    color: var(--text-main, #F3F8FF);
    text-align: left;
}

.page-khuyen-mai__hero-title {
    font-size: 3.2em;
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: 20px;
    color: var(--text-main, #F3F8FF);
    max-width: 600px;
}

.page-khuyen-mai__hero-description {
    font-size: 1.2em;
    color: var(--text-secondary, #AFC4E8);
    margin-bottom: 30px;
    max-width: 600px;
}

.page-khuyen-mai__hero-cta-buttons {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
    max-width: 400px; /* Constrain buttons width */
}

.page-khuyen-mai__hero-image {
    flex: 1 1 40%;
    text-align: center;
    min-width: 250px;
}

.page-khuyen-mai__hero-side-image {
    max-width: 600px;
    width: 100%;
    height: auto;
    display: block;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

/* Intro Section (Feature Grid) */
.page-khuyen-mai__intro-section {
    background-color: var(--deep-navy, #08162B);
    padding: 60px 0;
}

.page-khuyen-mai__feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 40px;
    text-align: center;
}

.page-khuyen-mai__feature-item {
    background-color: var(--card-bg, #10233F);
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    height: 100%; /* Ensure equal height */
}

.page-khuyen-mai__icon-box-media {
    width: 200px; /* Fixed size for circular images */
    height: 200px;
    aspect-ratio: 1 / 1;
    margin: 0 auto 25px;
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid var(--glow-color, #4FA8FF);
    box-shadow: 0 0 15px rgba(79, 168, 255, 0.5);
}

.page-khuyen-mai__icon-box-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    display: block;
}

.page-khuyen-mai__feature-title {
    font-size: 1.6em;
    font-weight: bold;
    color: var(--text-main, #F3F8FF);
    margin-bottom: 15px;
}

.page-khuyen-mai__feature-text {
    font-size: 1em;
    color: var(--text-secondary, #AFC4E8);
    flex-grow: 1; /* Pushes content to bottom */
}

/* Promo Grid Section */
.page-khuyen-mai__promo-grid-section {
    background-color: var(--deep-navy, #08162B);
    padding: 60px 0;
}

.page-khuyen-mai__promo-card-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, #10233F);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.page-khuyen-mai__promo-card-image {
    width: 100%;
    height: 220px; /* Fixed height for consistent card image appearance */
    object-fit: cover;
    display: block;
}

.page-khuyen-mai__promo-card-content {
    padding: 25px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.page-khuyen-mai__promo-card-title {
    font-size: 1.4em;
    font-weight: bold;
    color: var(--text-main, #F3F8FF);
    margin-bottom: 15px;
}

.page-khuyen-mai__promo-card-text {
    font-size: 1em;
    color: var(--text-secondary, #AFC4E8);
    margin-bottom: 20px;
    flex-grow: 1; /* Pushes button to bottom */
}

/* Guide Section */
.page-khuyen-mai__guide-section {
    background-color: var(--deep-navy, #08162B);
    padding: 60px 0;
}

.page-khuyen-mai__guide-list {
    list-style: none;
    padding: 0;
    margin-top: 40px;
}

.page-khuyen-mai__guide-item {
    background-color: var(--card-bg, #10233F);
    border-radius: 15px;
    padding: 25px 30px;
    margin-bottom: 20px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.page-khuyen-mai__guide-step-title {
    font-size: 1.5em;
    color: var(--glow-color, #4FA8FF);
    margin-bottom: 10px;
    font-weight: bold;
}

.page-khuyen-mai__guide-step-text {
    font-size: 1em;
    color: var(--text-secondary, #AFC4E8);
}

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

/* Terms Section */
.page-khuyen-mai__terms-section {
    background-color: var(--deep-navy, #08162B);
    padding: 60px 0;
}

.page-khuyen-mai__terms-list {
    list-style: disc;
    padding-left: 25px;
    margin-top: 30px;
    color: var(--text-secondary, #AFC4E8);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.page-khuyen-mai__terms-list li {
    margin-bottom: 10px;
    font-size: 1em;
}

/* FAQ Section */
.page-khuyen-mai__faq-section {
    background-color: var(--deep-navy, #08162B);
    padding: 60px 0;
}

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

.page-khuyen-mai__faq-item {
    background-color: var(--card-bg, #10233F);
    border-radius: 10px;
    margin-bottom: 15px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
    overflow: hidden; /* For smooth animation */
}

.page-khuyen-mai__faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 25px;
    cursor: pointer;
    font-weight: bold;
    font-size: 1.2em;
    color: var(--text-main, #F3F8FF);
    list-style: none; /* Remove default marker */
    position: relative;
}

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

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

.page-khuyen-mai__faq-toggle {
    font-size: 1.8em;
    line-height: 1;
    margin-left: 15px;
    color: var(--glow-color, #4FA8FF);
}

.page-khuyen-mai__faq-item[open] .page-khuyen-mai__faq-toggle {
    content: "−"; /* Change to minus when open */
}

.page-khuyen-mai__faq-answer {
    padding: 0 25px 20px;
    font-size: 1em;
    color: var(--text-secondary, #AFC4E8);
}

/* CTA Bottom Section */
.page-khuyen-mai__cta-bottom-section {
    background-color: var(--primary-color, #113B7A); /* Use primary brand color */
    padding: 80px 0;
    text-align: center;
}

.page-khuyen-mai__cta-bottom-content {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.page-khuyen-mai__cta-bottom-title {
    font-size: 2.8em;
    font-weight: bold;
    color: var(--text-main, #F3F8FF);
    margin-bottom: 20px;
    max-width: 800px;
}

.page-khuyen-mai__cta-bottom-description {
    font-size: 1.2em;
    color: var(--text-secondary, #AFC4E8);
    margin-bottom: 40px;
    max-width: 700px;
}

.page-khuyen-mai__cta-bottom-buttons {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    justify-content: center;
    max-width: 500px;
}

/* --- Responsive Styles (Mobile First Approach) --- */

/* Mobile Adaption for Images */
.page-khuyen-mai img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Mobile Adaption for Buttons and Containers */
.page-khuyen-mai__hero-cta-buttons,
.page-khuyen-mai__cta-bottom-buttons,
.page-khuyen-mai__promo-card-content .page-khuyen-mai__btn-small {
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    overflow: hidden;
}

@media (max-width: 768px) {
    .page-khuyen-mai {
        font-size: 15px;
        line-height: 1.5;
    }

    .page-khuyen-mai__container {
        padding: 30px 15px;
    }

    /* HERO Section */
    .page-khuyen-mai__hero-section {
        padding-top: 10px !important; /* Small top padding, no var(--header-offset) */
        padding-bottom: 40px;
    }
    .page-khuyen-mai__hero-container {
        flex-direction: column;
        padding: 20px 15px;
        gap: 20px;
    }
    .page-khuyen-mai__hero-content {
        text-align: center;
        flex: 1 1 100%;
    }
    .page-khuyen-mai__hero-title {
        font-size: 2.2em;
        max-width: 100%;
        margin-bottom: 15px;
    }
    .page-khuyen-mai__hero-description {
        font-size: 1em;
        max-width: 100%;
        margin-bottom: 20px;
    }
    .page-khuyen-mai__hero-cta-buttons {
        flex-direction: column;
        gap: 10px;
        max-width: 100%;
    }
    .page-khuyen-mai__hero-cta-buttons .page-khuyen-mai__btn-primary,
    .page-khuyen-mai__hero-cta-buttons .page-khuyen-mai__btn-secondary {
        width: 100% !important;
        max-width: 100% !important;
        padding: 10px 15px;
    }
    .page-khuyen-mai__hero-image {
        flex: 1 1 100%;
        min-width: unset;
    }
    .page-khuyen-mai__hero-side-image {
        max-width: 100% !important;
        width: 100% !important;
        height: auto !important;
    }

    /* Intro Section */
    .page-khuyen-mai__intro-section {
        padding: 40px 0;
    }
    .page-khuyen-mai__section-title {
        font-size: 1.8em;
        margin-bottom: 15px;
    }
    .page-khuyen-mai__section-description {
        font-size: 0.95em;
        margin-bottom: 30px;
    }
    .page-khuyen-mai__feature-grid {
        grid-template-columns: 1fr; /* Single column */
        gap: 20px;
    }
    .page-khuyen-mai__icon-box-media {
        width: 150px; /* Adjust size for mobile */
        height: 150px;
        margin-bottom: 20px;
    }
    .page-khuyen-mai__icon-box-media img {
        width: 100% !important;
        height: 100% !important;
        object-fit: cover;
    }
    .page-khuyen-mai__feature-title {
        font-size: 1.4em;
    }

    /* Promo Grid Section */
    .page-khuyen-mai__promo-grid-section {
        padding: 40px 0;
    }
    .page-khuyen-mai__promo-card-grid {
        grid-template-columns: 1fr; /* Single column */
        gap: 20px;
    }
    .page-khuyen-mai__promo-card-image {
        height: 180px; /* Adjust height for mobile */
    }
    .page-khuyen-mai__promo-card-content {
        padding: 20px;
    }
    .page-khuyen-mai__promo-card-title {
        font-size: 1.2em;
    }
    .page-khuyen-mai__promo-card-text {
        font-size: 0.9em;
    }
    .page-khuyen-mai__promo-card-content .page-khuyen-mai__btn-small {
        width: 100% !important;
        max-width: 100% !important;
        padding: 10px 15px;
    }

    /* Guide Section */
    .page-khuyen-mai__guide-section {
        padding: 40px 0;
    }
    .page-khuyen-mai__guide-item {
        padding: 20px;
    }
    .page-khuyen-mai__guide-step-title {
        font-size: 1.3em;
    }
    .page-khuyen-mai__guide-step-text {
        font-size: 0.9em;
    }
    .page-khuyen-mai__guide-cta .page-khuyen-mai__btn-primary {
        width: 100% !important;
        max-width: 100% !important;
        padding: 10px 15px;
    }

    /* Terms Section */
    .page-khuyen-mai__terms-section {
        padding: 40px 0;
    }
    .page-khuyen-mai__terms-list {
        padding-left: 20px;
    }
    .page-khuyen-mai__terms-list li {
        font-size: 0.9em;
    }

    /* FAQ Section */
    .page-khuyen-mai__faq-section {
        padding: 40px 0;
    }
    .page-khuyen-mai__faq-question {
        padding: 15px 20px;
        font-size: 1.1em;
    }
    .page-khuyen-mai__faq-toggle {
        font-size: 1.5em;
    }
    .page-khuyen-mai__faq-answer {
        padding: 0 20px 15px;
        font-size: 0.9em;
    }

    /* CTA Bottom Section */
    .page-khuyen-mai__cta-bottom-section {
        padding: 60px 0;
    }
    .page-khuyen-mai__cta-bottom-title {
        font-size: 2em;
        margin-bottom: 15px;
    }
    .page-khuyen-mai__cta-bottom-description {
        font-size: 1em;
        margin-bottom: 30px;
    }
    .page-khuyen-mai__cta-bottom-buttons {
        flex-direction: column;
        gap: 10px;
        max-width: 100%;
    }
    .page-khuyen-mai__cta-bottom-buttons .page-khuyen-mai__btn-primary,
    .page-khuyen-mai__cta-bottom-buttons .page-khuyen-mai__btn-secondary {
        width: 100% !important;
        max-width: 100% !important;
        padding: 10px 15px;
    }

    /* Universal responsive image handling for content sections */
    .page-khuyen-mai__section img,
    .page-khuyen-mai__promo-card img,
    .page-khuyen-mai__guide-item img {
        max-width: 100% !important;
        width: 100% !important;
        height: auto !important;
    }

    /* Container padding for mobile to prevent overflow */
    .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;
    }
}

/* Ensure images in content area are responsive, except specific cases like icon-box-media */
.page-khuyen-mai__content-area img,
.page-khuyen-mai__promo-card-image,
.page-khuyen-mai__guide-item img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Specific styling for icon-box-media img to maintain circular shape */
.page-khuyen-mai__icon-box-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

/* Ensure buttons and button containers are responsive */
.page-khuyen-mai__cta-button,
.page-khuyen-mai__btn-primary,
.page-khuyen-mai__btn-secondary,
.page-khuyen-mai__btn-small,
.page-khuyen-mai a[class*="button"],
.page-khuyen-mai a[class*="btn"] {
    max-width: 100%;
    box-sizing: border-box;
    white-space: normal;
    word-wrap: break-word;
}

.page-khuyen-mai__hero-cta-buttons,
.page-khuyen-mai__cta-bottom-buttons,
.page-khuyen-mai__button-group,
.page-khuyen-mai__btn-container {
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    overflow: hidden;
}

@media (max-width: 768px) {
    .page-khuyen-mai__cta-button,
    .page-khuyen-mai__btn-primary,
    .page-khuyen-mai__btn-secondary,
    .page-khuyen-mai__btn-small,
    .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;
    }

    .page-khuyen-mai__hero-cta-buttons,
    .page-khuyen-mai__cta-bottom-buttons,
    .page-khuyen-mai__button-group,
    .page-khuyen-mai__btn-container {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        flex-wrap: wrap !important;
        gap: 10px;
    }

    .page-khuyen-mai__hero-cta-buttons,
    .page-khuyen-mai__cta-bottom-buttons {
        display: flex;
        flex-direction: column; /* For vertical stacking on mobile */
    }
}