:root {
    --primary-color: #26A9E0;
    --secondary-color: #FFFFFF;
    --login-color: #EA7C07;
    --text-dark: #333333;
    --text-light: #ffffff;
    --background-light: #FFFFFF;
    --border-light: #e0e0e0;
    --padding-section: 60px 0;
    --padding-section-mobile: 30px 0;
}

.page-khuyen-mai {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark); /* Default text color for light backgrounds */
    background-color: var(--background-light); /* Default light background */
}

/* --- General Container & Section Styling --- */
.page-khuyen-mai__container {
    max-width: 1150px;
    margin: 0 auto;
    padding: 0 20px;
    box-sizing: border-box;
}

.page-khuyen-mai__section-title {
    font-size: clamp(2.2em, 4vw, 2.8em);
    font-weight: 700;
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 40px;
    line-height: 1.2;
}

.page-khuyen-mai__text-block {
    font-size: 1.1em;
    text-align: center;
    max-width: 800px;
    margin: 0 auto 30px auto;
}

.page-khuyen-mai__text-block a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: bold;
}

.page-khuyen-mai__text-block a:hover {
    text-decoration: underline;
}

/* --- Hero Section --- */
.page-khuyen-mai__hero-section {
    padding: 10px 0 var(--padding-section) 0; /* Small top padding, then larger bottom */
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-khuyen-mai__dark-bg {
    background-color: var(--primary-color);
    color: var(--text-light); /* Ensure light text on dark background */
}

.page-khuyen-mai__dark-bg .page-khuyen-mai__section-title,
.page-khuyen-mai__dark-bg .page-khuyen-mai__text-block a {
    color: var(--text-light); /* Override for links in dark section */
}

.page-khuyen-mai__light-bg {
    background-color: var(--background-light);
    color: var(--text-dark); /* Ensure dark text on light background */
}

.page-khuyen-mai__light-bg .page-khuyen-mai__section-title {
    color: var(--primary-color);
}

.page-khuyen-mai__main-title {
    font-size: clamp(2.5em, 5vw, 3.8em);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 20px;
    color: var(--text-light); /* Hero title is always light */
}

.page-khuyen-mai__hero-description {
    font-size: 1.2em;
    max-width: 900px;
    margin: 0 auto 40px auto;
    color: var(--text-light);
}

.page-khuyen-mai__hero-description a {
    color: var(--secondary-color);
    text-decoration: none;
    font-weight: bold;
}

.page-khuyen-mai__hero-description a:hover {
    text-decoration: underline;
}

.page-khuyen-mai__cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-bottom: 40px;
    flex-wrap: wrap; /* Allow wrapping for multiple buttons */
}

.page-khuyen-mai__btn-primary,
.page-khuyen-mai__btn-secondary {
    display: inline-block;
    padding: 15px 30px;
    border-radius: 8px;
    font-weight: bold;
    text-decoration: none;
    transition: all 0.3s ease;
    max-width: 300px; /* Limit button width */
    box-sizing: border-box;
    white-space: normal; /* Allow text wrapping */
    word-wrap: break-word; /* Allow long words to break */
    text-align: center;
}

.page-khuyen-mai__btn-primary {
    background-color: var(--login-color); /* Use login color for primary action */
    color: var(--secondary-color);
    border: 2px solid var(--login-color);
}

.page-khuyen-mai__btn-primary:hover {
    background-color: #d16e07; /* Slightly darker EA7C07 */
    border-color: #d16e07;
}

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

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

.page-khuyen-mai__hero-image {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
    border-radius: 10px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

/* --- Intro Section --- */
.page-khuyen-mai__intro-section {
    padding: var(--padding-section);
}

.page-khuyen-mai__feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.page-khuyen-mai__feature-item {
    background-color: var(--secondary-color);
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    text-align: center;
    border: 1px solid var(--border-light);
}

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

.page-khuyen-mai__feature-item p {
    color: var(--text-dark);
}

/* --- Promo Types Section --- */
.page-khuyen-mai__promo-types {
    padding: var(--padding-section);
}

.page-khuyen-mai__promo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.page-khuyen-mai__promo-card {
    background-color: var(--secondary-color);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    text-align: center;
    border: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
}

.page-khuyen-mai__card-image {
    width: 100%;
    height: 200px; /* Fixed height for consistency */
    object-fit: cover;
    display: block;
}

.page-khuyen-mai__promo-card h3 {
    font-size: 1.4em;
    color: var(--primary-color);
    margin: 20px 15px 10px 15px;
}

.page-khuyen-mai__promo-card p {
    font-size: 0.95em;
    color: var(--text-dark);
    padding: 0 15px 20px 15px;
    flex-grow: 1; /* Make paragraph take available space */
}

.page-khuyen-mai__card-btn {
    display: inline-block;
    background-color: var(--primary-color);
    color: var(--secondary-color);
    padding: 10px 20px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: bold;
    margin: 0 15px 20px 15px;
    transition: background-color 0.3s ease;
    max-width: calc(100% - 30px); /* Adjust for padding */
    box-sizing: border-box;
    white-space: normal;
    word-wrap: break-word;
}

.page-khuyen-mai__card-btn:hover {
    background-color: #2197cc; /* Slightly darker 26A9E0 */
}

/* --- Claim Guide Section --- */
.page-khuyen-mai__claim-guide {
    padding: var(--padding-section);
}

.page-khuyen-mai__steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.page-khuyen-mai__step-item {
    background-color: var(--secondary-color);
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    text-align: center;
    border: 1px solid var(--border-light);
}

.page-khuyen-mai__step-icon {
    width: 60px;
    height: 60px;
    background-color: var(--primary-color);
    color: var(--secondary-color);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 2em;
    font-weight: bold;
    margin: 0 auto 20px auto;
}

.page-khuyen-mai__step-title {
    font-size: 1.3em;
    color: var(--login-color); /* Use login color for step titles */
    margin-bottom: 15px;
}

.page-khuyen-mai__mid-image {
    max-width: 800px;
    height: auto;
    display: block;
    margin: 50px auto 0 auto;
    border-radius: 10px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

/* --- Terms Section --- */
.page-khuyen-mai__terms-section {
    padding: var(--padding-section);
}

.page-khuyen-mai__terms-list {
    list-style: disc;
    max-width: 800px;
    margin: 30px auto 40px auto;
    text-align: left;
    padding-left: 25px;
    color: var(--text-light); /* Light text on dark background */
}

.page-khuyen-mai__terms-list li {
    margin-bottom: 10px;
    font-size: 1.1em;
}

/* --- FAQ Section --- */
.page-khuyen-mai__faq-section {
    padding: var(--padding-section);
}

.page-khuyen-mai__faq-list {
    max-width: 900px;
    margin: 50px auto 0 auto;
    text-align: left;
}

.page-khuyen-mai__faq-item {
    background-color: var(--secondary-color);
    border: 1px solid var(--border-light);
    border-radius: 8px;
    margin-bottom: 15px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    overflow: hidden;
}

.page-khuyen-mai__faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 25px;
    font-size: 1.15em;
    font-weight: bold;
    color: var(--primary-color);
    cursor: pointer;
    background-color: #f9f9f9;
    border-bottom: 1px solid var(--border-light);
    list-style: none; /* Hide default marker for summary */
}

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

.page-khuyen-mai__faq-qtext {
    flex-grow: 1;
    color: var(--primary-color);
}

.page-khuyen-mai__faq-qtext a {
    color: var(--primary-color);
    text-decoration: none;
}

.page-khuyen-mai__faq-qtext a:hover {
    text-decoration: underline;
}

.page-khuyen-mai__faq-toggle {
    font-size: 1.5em;
    margin-left: 15px;
    color: var(--primary-color);
    transition: transform 0.3s ease;
}

.page-khuyen-mai__faq-answer {
    padding: 15px 25px 20px 25px;
    font-size: 1em;
    color: var(--text-dark);
}

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

.page-khuyen-mai__faq-answer a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: bold;
}

.page-khuyen-mai__faq-answer a:hover {
    text-decoration: underline;
}

/* --- Call to Action Section --- */
.page-khuyen-mai__call-to-action {
    padding: var(--padding-section);
    text-align: center;
}

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

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

.page-khuyen-mai__call-to-action .page-khuyen-mai__text-block a {
    color: var(--secondary-color);
}

.page-khuyen-mai__call-to-action .page-khuyen-mai__text-block a:hover {
    text-decoration: underline;
}

/* Ensure text colors are explicitly set for contrast */
.page-khuyen-mai__dark-bg .page-khuyen-mai__text-block { color: var(--text-light); }
.page-khuyen-mai__light-bg .page-khuyen-mai__text-block { color: var(--text-dark); }
.page-khuyen-mai__dark-bg .page-khuyen-mai__terms-list li { color: var(--text-light); }


/* --- Responsive Design --- */
@media (max-width: 1024px) {
    .page-khuyen-mai__section-title {
        font-size: clamp(2em, 4.5vw, 2.5em);
    }
    .page-khuyen-mai__main-title {
        font-size: clamp(2.2em, 5.5vw, 3.2em);
    }
    .page-khuyen-mai__hero-description {
        font-size: 1.1em;
    }
    .page-khuyen-mai__container {
        padding: 0 15px;
    }
    .page-khuyen-mai__card-image {
        height: 180px;
    }
    .page-khuyen-mai__mid-image {
        max-width: 100%;
    }
}

@media (max-width: 768px) {
    /* 1. Top Section (Hero) - padding/spacing/stacking */
    .page-khuyen-mai__hero-section {
        padding: 10px 0 var(--padding-section-mobile) 0 !important;
    }
    .page-khuyen-mai__main-title {
        font-size: clamp(1.8em, 7vw, 2.5em);
        margin-bottom: 15px;
    }
    .page-khuyen-mai__hero-description {
        font-size: 1em;
        margin-bottom: 30px;
    }
    .page-khuyen-mai__cta-buttons {
        flex-direction: column !important; /* Stack buttons vertically */
        gap: 15px;
        margin-bottom: 30px;
        padding-left: 15px;
        padding-right: 15px;
    }
    .page-khuyen-mai__btn-primary,
    .page-khuyen-mai__btn-secondary {
        max-width: 100% !important;
        width: 100% !important;
        padding: 12px 20px;
        font-size: 1em;
        box-sizing: border-box !important;
        white-space: normal !important;
        word-wrap: break-word !important;
    }

    /* 2. Single Column Long Text Container - padding, font size, max-width */
    .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: clamp(1.8em, 6vw, 2.2em);
        margin-bottom: 25px;
    }
    .page-khuyen-mai__text-block {
        font-size: 1em;
        margin-bottom: 20px;
        text-align: left;
    }
    .page-khuyen-mai__intro-section,
    .page-khuyen-mai__promo-types,
    .page-khuyen-mai__claim-guide,
    .page-khuyen-mai__terms-section,
    .page-khuyen-mai__faq-section,
    .page-khuyen-mai__call-to-action {
        padding: var(--padding-section-mobile) 0;
    }

    /* 3. Generic Images and Figure - max-width: 100% */
    .page-khuyen-mai img {
        max-width: 100% !important;
        width: 100% !important;
        height: auto !important;
        box-sizing: border-box !important;
        display: block !important;
    }
    .page-khuyen-mai__hero-image,
    .page-khuyen-mai__mid-image {
        border-radius: 5px;
        box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    }
    .page-khuyen-mai__card-image {
        height: 160px;
    }
    .page-khuyen-mai__feature-grid, .page-khuyen-mai__promo-grid, .page-khuyen-mai__steps-grid {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        padding-left: 15px;
        padding-right: 15px;
    }

    /* 4. Buttons and Button Containers - max-width: 100%, flex wrapping */
    .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;
        display: flex;
        flex-direction: column !important;
    }
    .page-khuyen-mai__card-btn {
        max-width: 100% !important;
        width: 100% !important;
        margin-left: 0;
        margin-right: 0;
        padding: 10px 15px;
        box-sizing: border-box !important;
        white-space: normal !important;
        word-wrap: break-word !important;
    }

    /* Feature Grid */
    .page-khuyen-mai__feature-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    .page-khuyen-mai__feature-item {
        padding: 20px;
    }

    /* Promo Grid */
    .page-khuyen-mai__promo-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    .page-khuyen-mai__promo-card h3 {
        font-size: 1.2em;
        margin: 15px 10px 8px 10px;
    }
    .page-khuyen-mai__promo-card p {
        font-size: 0.9em;
        padding: 0 10px 15px 10px;
    }

    /* Steps Grid */
    .page-khuyen-mai__steps-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    .page-khuyen-mai__step-item {
        padding: 20px;
    }
    .page-khuyen-mai__step-icon {
        width: 50px;
        height: 50px;
        font-size: 1.8em;
        margin-bottom: 15px;
    }
    .page-khuyen-mai__step-title {
        font-size: 1.2em;
        margin-bottom: 10px;
    }

    /* Terms List */
    .page-khuyen-mai__terms-list {
        font-size: 1em;
        margin: 20px auto 30px auto;
        padding-left: 20px;
    }

    /* FAQ List */
    .page-khuyen-mai__faq-question {
        padding: 15px 20px;
        font-size: 1.05em;
    }
    .page-khuyen-mai__faq-answer {
        padding: 10px 20px 15px 20px;
        font-size: 0.95em;
    }
}