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

.page-khuyen-mai {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-main); /* Default text color for dark body background */
    background-color: var(--color-deep-navy); /* Ensure consistency with shared body 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;
    text-align: center;
    margin-bottom: 20px;
    color: var(--text-main);
}

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

/* Text color overrides for specific sections */
.page-khuyen-mai__text-main {
    color: var(--text-main);
}
.page-khuyen-mai__text-secondary {
    color: var(--text-secondary);
}

/* Buttons */
.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;
    transition: all 0.3s ease;
    cursor: pointer;
    text-align: center;
    box-sizing: border-box;
    white-space: normal;
    word-wrap: break-word;
}

.page-khuyen-mai__btn-primary {
    background: var(--btn-gradient);
    color: #ffffff;
    border: none;
}

.page-khuyen-mai__btn-primary:hover {
    filter: brightness(1.1);
    box-shadow: 0 0 15px var(--color-glow);
}

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

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

.page-khuyen-mai__btn-small {
    padding: 8px 18px;
    font-size: 0.9em;
}

.page-khuyen-mai__btn-large {
    padding: 15px 30px;
    font-size: 1.1em;
}

.page-khuyen-mai__cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 30px;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    overflow: hidden;
}

.page-khuyen-mai__center-buttons {
    display: flex;
    justify-content: center;
    margin-top: 40px;
}

.page-khuyen-mai__link {
    color: var(--color-accent);
    text-decoration: underline;
}
.page-khuyen-mai__link:hover {
    color: var(--color-glow);
}

/* HERO Section */
.page-khuyen-mai__hero-section {
    padding-top: 10px; /* Small top padding as body has padding-top */
    padding-bottom: 60px;
    background-color: var(--color-deep-navy); /* Ensure consistency */
}

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

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

.page-khuyen-mai__hero-title {
    font-size: clamp(2em, 3.5vw, 3.2em); /* Use clamp for H1 */
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
    color: var(--text-main);
}

.page-khuyen-mai__hero-description {
    font-size: 1.15em;
    margin-bottom: 30px;
    color: var(--text-secondary);
}

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

.page-khuyen-mai__hero-side-image {
    max-width: 600px;
    width: 100%;
    height: 600px;
    object-fit: cover;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    display: block; /* Ensure it behaves as a block element */
}

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

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

.page-khuyen-mai__feature-item {
    text-align: center;
    padding: 25px;
    background-color: var(--bg-card);
    border-radius: 12px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
    border: 1px solid var(--color-border);
}

.page-khuyen-mai__icon-box-media {
    width: 200px; /* Adjusted to 200px for 400x400 image display, maintains 1:1 aspect */
    height: 200px;
    aspect-ratio: 1/1;
    margin: 0 auto 20px;
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid var(--color-gold);
    display: flex;
    justify-content: center;
    align-items: center;
}

.page-khuyen-mai__icon-box-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%; /* Ensure image inside is also round */
    display: block;
}

.page-khuyen-mai__feature-title {
    font-size: 1.5em;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-main);
}

.page-khuyen-mai__feature-text {
    font-size: 1em;
    color: var(--text-secondary);
}

/* Promo Types Section */
.page-khuyen-mai__promo-types-section {
    padding: 60px 0;
    background-color: var(--color-primary); /* Darker background for this section */
}

.page-khuyen-mai__dark-section {
    background-color: var(--color-primary);
    color: var(--text-main);
}

.page-khuyen-mai__promo-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(--bg-card);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
    border: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
}

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

.page-khuyen-mai__promo-card-content {
    padding: 20px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.page-khuyen-mai__promo-card-title {
    font-size: 1.4em;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-main);
}

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

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

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

.page-khuyen-mai__step-item {
    background-color: var(--bg-card);
    border-radius: 12px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
    border: 1px solid var(--color-border);
    position: relative;
    overflow: hidden;
}

.page-khuyen-mai__step-icon {
    width: 50px;
    height: 50px;
    background: var(--btn-gradient);
    color: #ffffff;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.8em;
    font-weight: bold;
    margin: 0 auto 20px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.3);
}

.page-khuyen-mai__step-title {
    font-size: 1.6em;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--text-main);
}

.page-khuyen-mai__step-text {
    font-size: 1em;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.page-khuyen-mai__step-image {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin-top: 20px;
    display: block;
}

/* Terms Section */
.page-khuyen-mai__terms-section {
    padding: 60px 0;
    background-color: var(--color-primary); /* Darker background */
}

.page-khuyen-mai__terms-list {
    list-style: none;
    padding: 0;
    margin-top: 40px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.page-khuyen-mai__terms-item {
    background-color: var(--bg-card);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 18px 25px;
    margin-bottom: 15px;
    font-size: 1.05em;
    color: var(--text-secondary);
    position: relative;
    padding-left: 40px;
}

.page-khuyen-mai__terms-item::before {
    content: "✓";
    color: var(--color-gold);
    font-weight: bold;
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.2em;
}

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

.page-khuyen-mai__faq-list {
    max-width: 800px;
    margin: 40px auto 0;
}

.page-khuyen-mai__faq-item {
    background-color: var(--bg-card);
    border: 1px solid var(--color-border);
    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: 1.15em;
    font-weight: 600;
    color: var(--text-main);
    cursor: pointer;
    background-color: var(--bg-card);
    transition: background-color 0.3s ease;
    list-style: none; /* For details/summary */
}

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

.page-khuyen-mai__faq-question:hover {
    background-color: rgba(255, 255, 255, 0.05);
}

.page-khuyen-mai__faq-toggle {
    font-size: 1.5em;
    font-weight: bold;
    color: var(--color-accent);
}

.page-khuyen-mai__faq-answer {
    padding: 0 25px 20px;
    font-size: 1em;
    color: var(--text-secondary);
    line-height: 1.7;
}

.page-khuyen-mai__faq-answer p {
    margin: 0;
    color: var(--text-secondary);
}

/* CTA Section */
.page-khuyen-mai__cta-section {
    padding: 60px 0;
    background-color: var(--color-primary); /* Darker background */
}

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

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

/* Mobile responsive styles */
@media (max-width: 1024px) {
    .page-khuyen-mai__hero-container {
        flex-direction: column;
        text-align: center;
    }
    .page-khuyen-mai__hero-content {
        text-align: center;
    }
    .page-khuyen-mai__hero-image {
        order: -1; /* Image above text on smaller screens */
        margin-bottom: 30px;
    }
    .page-khuyen-mai__hero-title {
        font-size: clamp(2.2em, 5vw, 2.8em);
    }
}

@media (max-width: 768px) {
    /* HERO Section mobile */
    .page-khuyen-mai__hero-section {
        padding-top: 10px !important; /* Small top padding for mobile */
        padding-bottom: 40px;
    }
    .page-khuyen-mai__hero-container {
        padding: 30px 15px;
        gap: 25px;
    }
    .page-khuyen-mai__hero-title {
        font-size: 2.2em;
    }
    .page-khuyen-mai__hero-description {
        font-size: 1em;
    }
    .page-khuyen-mai__cta-buttons {
        flex-direction: column;
        gap: 15px;
    }
    .page-khuyen-mai__btn-primary,
    .page-khuyen-mai__btn-secondary {
        max-width: 100% !important;
        width: 100% !important;
        padding-left: 15px;
        padding-right: 15px;
        font-size: 1em;
    }
    .page-khuyen-mai__btn-large {
        padding: 12px 20px;
    }
    .page-khuyen-mai__hero-side-image {
        height: auto !important;
    }

    /* Intro Section mobile */
    .page-khuyen-mai__intro-section {
        padding: 40px 0;
    }
    .page-khuyen-mai__container {
        padding: 30px 15px;
    }
    .page-khuyen-mai__section-title {
        font-size: 2em;
    }
    .page-khuyen-mai__section-description {
        font-size: 0.95em;
    }
    .page-khuyen-mai__features-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    .page-khuyen-mai__icon-box-media {
        width: 150px;
        height: 150px;
        margin-bottom: 15px;
    }
    .page-khuyen-mai__icon-box-media img {
        height: 100% !important;
        object-fit: cover !important;
    }
    .page-khuyen-mai__feature-title {
        font-size: 1.3em;
    }
    .page-khuyen-mai__feature-text {
        font-size: 0.9em;
    }

    /* Promo Types Section mobile */
    .page-khuyen-mai__promo-types-section {
        padding: 40px 0;
    }
    .page-khuyen-mai__promo-grid {
        grid-template-columns: 1fr;
        gap: 25px;
    }
    .page-khuyen-mai__promo-card-image {
        height: 180px !important;
    }
    .page-khuyen-mai__promo-card-title {
        font-size: 1.25em;
    }
    .page-khuyen-mai__promo-card-text {
        font-size: 0.9em;
    }

    /* How To Claim Section mobile */
    .page-khuyen-mai__how-to-claim-section {
        padding: 40px 0;
    }
    .page-khuyen-mai__steps-grid {
        grid-template-columns: 1fr;
        gap: 25px;
    }
    .page-khuyen-mai__step-item {
        padding: 25px;
    }
    .page-khuyen-mai__step-icon {
        width: 40px;
        height: 40px;
        font-size: 1.5em;
        margin-bottom: 15px;
    }
    .page-khuyen-mai__step-title {
        font-size: 1.4em;
    }
    .page-khuyen-mai__step-text {
        font-size: 0.95em;
    }
    .page-khuyen-mai__step-image {
        height: auto !important;
    }

    /* Terms Section mobile */
    .page-khuyen-mai__terms-section {
        padding: 40px 0;
    }
    .page-khuyen-mai__terms-list {
        margin-top: 30px;
    }
    .page-khuyen-mai__terms-item {
        padding: 15px 20px 15px 35px;
        font-size: 0.95em;
        margin-bottom: 10px;
    }
    .page-khuyen-mai__terms-item::before {
        left: 10px;
    }

    /* FAQ Section mobile */
    .page-khuyen-mai__faq-section {
        padding: 40px 0;
    }
    .page-khuyen-mai__faq-list {
        margin-top: 30px;
    }
    .page-khuyen-mai__faq-question {
        padding: 15px 20px;
        font-size: 1em;
    }
    .page-khuyen-mai__faq-toggle {
        font-size: 1.2em;
    }
    .page-khuyen-mai__faq-answer {
        padding: 0 20px 15px;
        font-size: 0.9em;
    }

    /* CTA Section mobile */
    .page-khuyen-mai__cta-section {
        padding: 40px 0;
    }

    /* General image responsiveness for mobile */
    .page-khuyen-mai img {
        max-width: 100% !important;
        width: 100% !important;
        height: auto !important;
    }
    .page-khuyen-mai__section,
    .page-khuyen-mai__card,
    .page-khuyen-mai__container,
    .page-khuyen-mai__hero-container,
    .page-khuyen-mai__promo-card,
    .page-khuyen-mai__feature-item,
    .page-khuyen-mai__step-item,
    .page-khuyen-mai__faq-item {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        padding-left: 15px;
        padding-right: 15px;
    }
    .page-khuyen-mai__cta-buttons {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        padding-left: 15px;
        padding-right: 15px;
        flex-wrap: wrap !important;
        gap: 10px;
    }
    .page-khuyen-mai__center-buttons {
        padding-left: 15px;
        padding-right: 15px;
    }
}