:root {
    --vi88-primary-color: #113B7A;
    --vi88-secondary-color: #1D5FD1;
    --vi88-button-gradient: linear-gradient(180deg, #2B73F6 0%, #1144A6 100%);
    --vi88-card-bg: #10233F;
    --vi88-text-main: #F3F8FF;
    --vi88-text-secondary: #AFC4E8;
    --vi88-border-color: #244D84;
    --vi88-glow-color: #4FA8FF;
    --vi88-gold-color: #F2C14E;
    --vi88-divider-color: #1B3357;
    --vi88-deep-navy-color: #08162B;
}

.page-khuyen-mai {
    font-family: 'Arial', sans-serif;
    color: var(--vi88-text-main);
    background-color: var(--vi88-deep-navy-color);
    line-height: 1.6;
    overflow-x: hidden;
}

.page-khuyen-mai__container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.page-khuyen-mai__center-content {
    text-align: center;
}

.page-khuyen-mai__section-title {
    font-size: 2.5rem;
    color: var(--vi88-gold-color);
    text-align: center;
    margin-bottom: 20px;
    text-shadow: 0 0 8px rgba(242, 193, 78, 0.5);
    font-weight: bold;
    line-height: 1.2;
}

.page-khuyen-mai__section-description {
    font-size: 1.1rem;
    color: var(--vi88-text-secondary);
    text-align: center;
    margin-bottom: 40px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.page-khuyen-mai__dark-section {
    background-color: var(--vi88-primary-color);
    padding: 60px 0;
    color: var(--vi88-text-main);
}

.page-khuyen-mai__light-bg {
    background-color: #f0f2f5;
    padding: 60px 0;
}

.page-khuyen-mai__dark-text {
    color: #333333;
}

.page-khuyen-mai__btn-primary,
.page-khuyen-mai__btn-secondary {
    display: inline-block;
    padding: 12px 25px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: bold;
    font-size: 1rem;
    transition: all 0.3s ease;
    cursor: pointer;
    box-sizing: border-box;
    white-space: normal;
    word-wrap: break-word;
}

.page-khuyen-mai__btn-primary {
    background: var(--vi88-button-gradient);
    color: var(--vi88-text-main);
    border: 2px solid var(--vi88-primary-color);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.page-khuyen-mai__btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
}

.page-khuyen-mai__btn-secondary {
    background: var(--vi88-text-main);
    color: var(--vi88-primary-color);
    border: 2px solid var(--vi88-primary-color);
}

.page-khuyen-mai__btn-secondary:hover {
    background: var(--vi88-primary-color);
    color: var(--vi88-text-main);
}

.page-khuyen-mai__btn-block {
    display: block;
    width: fit-content;
    margin: 30px auto 0;
    padding: 15px 30px;
    font-size: 1.1rem;
}

.page-khuyen-mai__btn-large {
    padding: 15px 35px;
    font-size: 1.2rem;
    margin-top: 30px;
}

/* Hero Carousel Section */
.page-khuyen-mai__hero-carousel-section {
    padding-top: 10px; /* Small top padding, body handles header offset */
    position: relative;
    overflow: hidden;
    max-width: 100%;
    width: 100%;
    box-sizing: border-box;
}

.page-khuyen-mai__hero-slider {
    position: relative;
    width: 100%;
    max-width: 1020px;
    margin: 0 auto;
    height: 351px; /* Fixed height for desktop */
    overflow: hidden;
    border-radius: 15px;
    box-shadow: 0 0 25px rgba(0,0,0,0.5);
}

.page-khuyen-mai__hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.8s ease-in-out;
    display: flex;
    justify-content: center;
    align-items: center;
}

.page-khuyen-mai__hero-slide.is-active {
    opacity: 1;
}

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

.page-khuyen-mai__hero-content {
    position: absolute;
    bottom: 20px;
    left: 20px;
    right: 20px;
    background: rgba(0, 0, 0, 0.6);
    padding: 20px;
    border-radius: 10px;
    text-align: left;
    max-width: 80%;
}

.page-khuyen-mai__main-title {
    font-size: clamp(2rem, 3vw, 3.5rem);
    color: var(--vi88-gold-color);
    margin-bottom: 10px;
    text-shadow: 0 0 10px rgba(242, 193, 78, 0.7);
    font-weight: bold;
    line-height: 1.2;
}

.page-khuyen-mai__hero-description {
    font-size: 1.1rem;
    color: var(--vi88-text-main);
    margin-bottom: 20px;
}

.page-khuyen-mai__hero-slider-prev,
.page-khuyen-mai__hero-slider-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0, 0, 0, 0.5);
    color: var(--vi88-text-main);
    border: none;
    padding: 10px 15px;
    cursor: pointer;
    z-index: 10;
    font-size: 1.5rem;
    border-radius: 5px;
    transition: background 0.3s ease;
}

.page-khuyen-mai__hero-slider-prev:hover,
.page-khuyen-mai__hero-slider-next:hover {
    background: rgba(0, 0, 0, 0.7);
}

.page-khuyen-mai__hero-slider-prev {
    left: 10px;
}

.page-khuyen-mai__hero-slider-next {
    right: 10px;
}

/* Overview Section */
.page-khuyen-mai__overview-section {
    background-color: var(--vi88-primary-color);
    padding: 60px 0;
    color: var(--vi88-text-main);
}

/* Guide Box Section (5 cards) */
.page-khuyen-mai__guide-box {
    background-color: var(--vi88-text-main);
    padding: 60px 0;
}

.page-khuyen-mai__guide-grid {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
    margin-top: 40px;
}

.page-khuyen-mai__guide-card {
    flex: 0 0 calc(20% - 16px);
    max-width: calc(20% - 16px);
    text-align: center;
    position: relative;
    padding-bottom: 0;
}

.page-khuyen-mai__guide-card img {
    width: 100%;
    height: 350px;
    object-fit: cover;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease;
}

.page-khuyen-mai__guide-card a:hover img {
    transform: translateY(-5px);
}

.page-khuyen-mai__guide-card--pos-1 {
    padding-top: 50px;
}
.page-khuyen-mai__guide-card--pos-2 {
    padding-top: 25px;
}
.page-khuyen-mai__guide-card--pos-3 {
    padding-top: 0;
}
.page-khuyen-mai__guide-card--pos-4 {
    padding-top: 25px;
}
.page-khuyen-mai__guide-card--pos-5 {
    padding-top: 50px;
}

/* Detailed Promotions Section (Home Content Box) */
.page-khuyen-mai__detailed-promotions-section {
    background-color: var(--vi88-primary-color);
    padding: 60px 0;
    color: var(--vi88-text-main);
}

.page-khuyen-mai__home-content-box {
    max-width: 900px;
    margin: 0 auto;
    padding: 30px;
    border: 5px solid var(--vi88-border-color);
    border-radius: 15px;
    box-shadow: 0 0 20px rgba(0,0,0,0.5), 0 0 30px var(--vi88-glow-color);
    height: 700px; /* Fixed height for desktop scrolling */
    background-color: var(--vi88-card-bg);
}

.page-khuyen-mai__home-content-inner {
    height: 100%;
    overflow-y: auto; /* Enable scrolling on desktop */
    padding-right: 15px; /* Space for scrollbar */
}

.page-khuyen-mai__home-content-inner::-webkit-scrollbar {
    width: 8px;
}

.page-khuyen-mai__home-content-inner::-webkit-scrollbar-track {
    background: var(--vi88-primary-color);
    border-radius: 10px;
}

.page-khuyen-mai__home-content-inner::-webkit-scrollbar-thumb {
    background: var(--vi88-gold-color);
    border-radius: 10px;
}

.page-khuyen-mai__content-heading {
    font-size: 1.8rem;
    color: var(--vi88-gold-color);
    margin-top: 30px;
    margin-bottom: 15px;
    font-weight: bold;
}

.page-khuyen-mai__content-paragraph {
    font-size: 1rem;
    color: var(--vi88-text-secondary);
    margin-bottom: 15px;
    line-height: 1.7;
}

/* How to Claim Section */
.page-khuyen-mai__how-to-claim-section {
    background-color: var(--vi88-text-main);
    padding: 60px 0;
}

.page-khuyen-mai__steps-list {
    list-style: none;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.page-khuyen-mai__step-item {
    background-color: #ffffff;
    border: 1px solid var(--vi88-border-color);
    border-radius: 10px;
    padding: 25px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    text-align: center;
    color: #333333;
    transition: transform 0.3s ease;
}

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

.page-khuyen-mai__step-title {
    font-size: 1.5rem;
    color: var(--vi88-primary-color);
    margin-bottom: 10px;
    font-weight: bold;
}

.page-khuyen-mai__step-description {
    font-size: 0.95rem;
    color: #555555;
    margin-bottom: 20px;
}

/* Blog Section */
.page-khuyen-mai__blog-section {
    background-color: var(--vi88-primary-color);
    padding: 60px 0;
    color: var(--vi88-text-main);
}

.page-khuyen-mai__blog-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.page-khuyen-mai__blog-card {
    background-color: var(--vi88-card-bg);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease;
}

.page-khuyen-mai__blog-card:hover {
    transform: translateY(-5px);
}

.page-khuyen-mai__blog-card img {
    width: 100%;
    height: 200px; /* Fixed height for blog card images */
    object-fit: cover;
    display: block;
}

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

.page-khuyen-mai__blog-card-title {
    font-size: 1.3rem;
    margin-bottom: 10px;
    line-height: 1.4;
}

.page-khuyen-mai__blog-card-title a {
    color: var(--vi88-gold-color);
    text-decoration: none;
}

.page-khuyen-mai__blog-card-title a:hover {
    text-decoration: underline;
}

.page-khuyen-mai__blog-card-date {
    font-size: 0.85rem;
    color: var(--vi88-text-secondary);
    margin-bottom: 10px;
}

.page-khuyen-mai__blog-card-excerpt {
    font-size: 0.95rem;
    color: var(--vi88-text-secondary);
    margin-bottom: 20px;
}

.page-khuyen-mai__blog-read-more {
    color: var(--vi88-secondary-color);
    text-decoration: none;
    font-weight: bold;
}

.page-khuyen-mai__blog-read-more:hover {
    text-decoration: underline;
}

.page-khuyen-mai__button-group {
    margin-top: 40px;
    display: flex;
    justify-content: center;
    gap: 20px;
}

/* Final CTA Section */
.page-khuyen-mai__cta-final {
    background-color: var(--vi88-deep-navy-color);
    padding: 80px 0;
    color: var(--vi88-text-main);
}

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

/* Tablet styles */
@media (max-width: 1024px) {
    .page-khuyen-mai__container {
        padding: 15px;
    }

    .page-khuyen-mai__section-title {
        font-size: 2rem;
    }

    .page-khuyen-mai__hero-slider {
        height: 300px;
    }

    .page-khuyen-mai__hero-content {
        max-width: 90%;
        padding: 15px;
        bottom: 15px;
        left: 15px;
        right: 15px;
    }

    .page-khuyen-mai__main-title {
        font-size: 2.5rem;
    }

    .page-khuyen-mai__guide-grid {
        gap: 15px;
    }

    .page-khuyen-mai__guide-card {
        flex: 0 0 calc(33.33% - 10px);
        max-width: calc(33.33% - 10px);
    }

    .page-khuyen-mai__guide-card--pos-1,
    .page-khuyen-mai__guide-card--pos-5 {
        padding-top: 0;
    }

    .page-khuyen-mai__guide-card--pos-2,
    .page-khuyen-mai__guide-card--pos-4 {
        padding-top: 0;
    }

    .page-khuyen-mai__home-content-box {
        max-width: 95%;
        height: 600px;
        padding: 20px;
    }

    .page-khuyen-mai__blog-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
}

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

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

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

    .page-khuyen-mai__section-description {
        font-size: 1rem;
        margin-bottom: 25px;
    }

    /* Hero Carousel Section */
    .page-khuyen-mai__hero-carousel-section {
        padding-top: 10px !important;
        padding-left: 0 !important;
        padding-right: 0 !important;
    }

    .page-khuyen-mai__hero-slider {
        height: 250px;
        border-radius: 0;
        max-width: 100%;
        margin: 0;
    }

    .page-khuyen-mai__hero-content {
        position: static;
        background: none;
        padding: 15px;
        text-align: center;
        max-width: 100%;
        margin-top: -80px; /* Pull content up slightly over image */
    }

    .page-khuyen-mai__hero-slide {
        flex-direction: column;
        justify-content: flex-start;
    }

    .page-khuyen-mai__hero-slide img {
        width: 100% !important;
        height: 100% !important;
        max-width: 100% !important;
    }

    .page-khuyen-mai__main-title {
        font-size: 1.8rem;
        margin-bottom: 5px;
    }

    .page-khuyen-mai__hero-description {
        font-size: 0.9rem;
        margin-bottom: 15px;
    }

    .page-khuyen-mai__hero-slider-prev,
    .page-khuyen-mai__hero-slider-next {
        padding: 5px 10px;
        font-size: 1.2rem;
    }

    /* Guide Box Section */
    .page-khuyen-mai__guide-grid {
        display: grid;
        grid-template-columns: repeat(6, 1fr);
        gap: 10px;
    }

    .page-khuyen-mai__guide-card {
        padding-top: 0 !important;
        flex: none;
        max-width: none;
    }

    .page-khuyen-mai__guide-card--pos-1,
    .page-khuyen-mai__guide-card--pos-2 {
        grid-column: span 3;
    }

    .page-khuyen-mai__guide-card--pos-3,
    .page-khuyen-mai__guide-card--pos-4,
    .page-khuyen-mai__guide-card--pos-5 {
        grid-column: span 2;
    }

    .page-khuyen-mai__guide-card img {
        height: auto !important;
        max-width: 100% !important;
        width: 100% !important;
        aspect-ratio: 250 / 350;
    }

    /* Detailed Promotions Section (Home Content Box) */
    .page-khuyen-mai__home-content-box {
        max-width: 100%;
        height: auto; /* Auto height on mobile */
        overflow: visible;
        padding: 15px;
        border-radius: 10px;
    }

    .page-khuyen-mai__home-content-inner {
        height: auto;
        overflow: visible;
        padding-right: 0;
    }

    .page-khuyen-mai__content-heading {
        font-size: 1.4rem;
        margin-top: 20px;
        margin-bottom: 10px;
    }

    .page-khuyen-mai__content-paragraph {
        font-size: 0.9rem;
        margin-bottom: 10px;
    }

    /* How to Claim Section */
    .page-khuyen-mai__steps-list {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .page-khuyen-mai__step-item {
        padding: 20px;
    }

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

    /* Blog Section */
    .page-khuyen-mai__blog-grid {
        grid-template-columns: 1fr; /* Single column on mobile */
        gap: 20px;
    }

    .page-khuyen-mai__blog-card img {
         /* Adjust height for mobile */
    }

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

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

    .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 !important;
        padding-right: 15px !important;
    }

    .page-khuyen-mai__button-group,
    .page-khuyen-mai__cta-buttons,
    .page-khuyen-mai__btn-container {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        padding-left: 15px !important;
        padding-right: 15px !important;
        flex-wrap: wrap !important;
        gap: 10px;
        flex-direction: column; /* Ensure vertical stacking for button groups */
    }
    .page-khuyen-mai__btn-block {
        width: 100% !important;
    }
}