/* style/khuyen-mai.css */
:root {
    --primary-color: #E53935;
    --secondary-color: #FF5A4F;
    --text-main-color: #333333;
    --card-bg-color: #FFFFFF;
    --page-bg-color: #F5F7FA;
    --border-color: #E0E0E0;
}

.page-khuyen-mai {
    font-family: Arial, sans-serif;
    color: var(--text-main-color);
    background-color: var(--page-bg-color);
    line-height: 1.6;
}

.page-khuyen-mai__hero-section {
    background-color: var(--primary-color);
    color: #ffffff;
    padding: 40px 20px;
    text-align: center;
    padding-top: 10px; /* Small top padding, assuming body handles header offset */
}

.page-khuyen-mai__hero-content {
    max-width: 900px;
    margin: 0 auto;
}

.page-khuyen-mai__main-title {
    font-size: clamp(2em, 4vw, 3.5em);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 15px;
    color: #ffffff;
}

.page-khuyen-mai__intro-text {
    font-size: 1.1em;
    margin-bottom: 30px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.page-khuyen-mai__cta-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
}

.page-khuyen-mai__cta-buttons--center {
    margin-top: 40px;
    margin-bottom: 40px;
}

.page-khuyen-mai__btn {
    display: inline-block;
    padding: 12px 25px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 700;
    transition: background-color 0.3s ease, transform 0.2s ease;
    max-width: 100%;
    box-sizing: border-box;
    white-space: normal;
    word-wrap: break-word;
    text-align: center;
}

.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 {
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

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

.page-khuyen-mai__btn-secondary:hover {
    background-color: var(--primary-color);
    color: #ffffff;
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.page-khuyen-mai__btn-small {
    display: inline-block;
    padding: 8px 15px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 600;
    background: linear-gradient(180deg, var(--secondary-color) 0%, var(--primary-color) 100%);
    color: #ffffff;
    border: none;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

.page-khuyen-mai__btn-small:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.page-khuyen-mai__section {
    padding: 60px 0;
    background-color: var(--page-bg-color);
}

.page-khuyen-mai__section:nth-of-type(even) {
    background-color: #fcfcfc;
}

.page-khuyen-mai__article-wrap {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
}

.page-khuyen-mai__article-wrap--center {
    text-align: center;
}

.page-khuyen-mai__section-title {
    font-size: 2.5em;
    font-weight: 700;
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 40px;
    line-height: 1.2;
}

.page-khuyen-mai__sub-title {
    font-size: 1.8em;
    font-weight: 600;
    color: var(--text-main-color);
    margin-top: 30px;
    margin-bottom: 20px;
}

.page-khuyen-mai p {
    margin-bottom: 15px;
    color: var(--text-main-color);
}

.page-khuyen-mai__figure {
    margin: 30px auto;
    text-align: center;
    max-width: 680px;
}

.page-khuyen-mai__figure img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    display: block;
    margin: 0 auto;
    min-width: 200px; /* Minimum size requirement */
    min-height: 200px; /* Minimum size requirement */
}

.page-khuyen-mai__figcaption {
    font-style: italic;
    font-size: 0.9em;
    color: #666;
    margin-top: 10px;
}

.page-khuyen-mai__list {
    list-style: disc;
    margin-left: 25px;
    margin-bottom: 20px;
    color: var(--text-main-color);
}

.page-khuyen-mai__list li {
    margin-bottom: 10px;
}

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

.page-khuyen-mai__promo-card {
    background-color: var(--card-bg-color);
    border-radius: 12px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    padding: 25px;
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid var(--border-color);
    color: var(--text-main-color);
}

.page-khuyen-mai__promo-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

.page-khuyen-mai__promo-card .page-khuyen-mai__figure {
    margin-top: 0;
    margin-left: -25px;
    margin-right: -25px;
    margin-bottom: 20px;
    max-width: calc(100% + 50px);
}

.page-khuyen-mai__promo-card .page-khuyen-mai__figure img {
    border-top-left-radius: 12px;
    border-top-right-radius: 12px;
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
    box-shadow: none;
}

.page-khuyen-mai__card-title {
    font-size: 1.5em;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 15px;
}

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

.page-khuyen-mai__step-item {
    background-color: var(--card-bg-color);
    border-radius: 10px;
    padding: 25px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
    text-align: center;
    border: 1px solid var(--border-color);
    color: var(--text-main-color);
}

.page-khuyen-mai__step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: #ffffff;
    font-size: 1.8em;
    font-weight: 700;
    margin-bottom: 20px;
}

.page-khuyen-mai__step-title {
    font-size: 1.3em;
    font-weight: 600;
    color: var(--text-main-color);
    margin-bottom: 15px;
}

.page-khuyen-mai__warning-box {
    background-color: #fff3cd; /* Light yellow for warning */
    border-left: 5px solid #ffc107; /* Yellow border */
    padding: 15px 20px;
    margin-top: 30px;
    border-radius: 5px;
    color: #664d03; /* Dark yellow text */
}

.page-khuyen-mai__warning-box p {
    margin-bottom: 0;
}

.page-khuyen-mai__faq-list {
    margin-top: 30px;
}

.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;
    color: var(--text-main-color);
}

.page-khuyen-mai__faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    font-weight: 600;
    font-size: 1.1em;
    cursor: pointer;
    background-color: #f9f9f9;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-main-color);
    list-style: none; /* For details/summary */
}

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

.page-khuyen-mai__faq-question:hover {
    background-color: #f0f0f0;
}

.page-khuyen-mai__faq-item[open] .page-khuyen-mai__faq-question {
    border-bottom: 1px solid var(--border-color);
}

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

.page-khuyen-mai__faq-toggle {
    font-size: 1.5em;
    line-height: 1;
    margin-left: 15px;
    color: var(--primary-color);
}

.page-khuyen-mai__faq-answer {
    padding: 15px 20px;
    font-size: 0.95em;
    color: #555;
    background-color: #ffffff;
}

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

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

@media (max-width: 1024px) {
    .page-khuyen-mai__section-title {
        font-size: 2.2em;
    }

    .page-khuyen-mai__sub-title {
        font-size: 1.6em;
    }

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

    .page-khuyen-mai__intro-text {
        font-size: 1em;
    }

    .page-khuyen-mai__promo-grid,
    .page-khuyen-mai__steps-grid {
        gap: 20px;
    }

    .page-khuyen-mai__article-wrap {
        padding: 0 15px;
    }
}

@media (max-width: 768px) {
    /* 1. Top section title + dual CTA */
    .page-khuyen-mai__hero-section {
        padding-top: 10px !important; /* Small top padding, overridden by important */
        padding-bottom: 30px;
    }

    .page-khuyen-mai__main-title {
        font-size: 2em;
        margin-bottom: 10px;
    }

    .page-khuyen-mai__intro-text {
        font-size: 0.95em;
        margin-bottom: 25px;
    }

    .page-khuyen-mai__cta-buttons {
        flex-direction: column;
        gap: 10px;
        padding-left: 15px;
        padding-right: 15px;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
    }

    /* Buttons must be full width on mobile */
    .page-khuyen-mai__btn {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
        white-space: normal !important;
        word-wrap: break-word !important;
        padding-left: 15px;
        padding-right: 15px;
    }

    /* 2. Single-column long text containers */
    .page-khuyen-mai__article-wrap {
        padding-left: 15px !important;
        padding-right: 15px !important;
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
    }

    .page-khuyen-mai__section {
        padding: 40px 0;
    }

    .page-khuyen-mai__section-title {
        font-size: 1.8em;
        margin-bottom: 30px;
    }

    .page-khuyen-mai__sub-title {
        font-size: 1.4em;
        margin-top: 25px;
        margin-bottom: 15px;
    }

    .page-khuyen-mai p,
    .page-khuyen-mai__list li {
        font-size: 1em;
    }

    .page-khuyen-mai__warning-box {
        padding: 10px 15px;
        font-size: 0.9em;
    }

    /* 3. Generic images and figures */
    .page-khuyen-mai img {
        max-width: 100% !important;
        width: 100% !important;
        height: auto !important;
        min-width: 200px !important;
        min-height: 200px !important;
        box-sizing: border-box !important;
    }

    .page-khuyen-mai__figure {
        margin: 20px auto;
        padding: 0;
    }

    .page-khuyen-mai__figcaption {
        font-size: 0.8em;
    }

    .page-khuyen-mai__promo-grid,
    .page-khuyen-mai__steps-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .page-khuyen-mai__promo-card .page-khuyen-mai__figure {
        margin-left: -25px;
        margin-right: -25px;
        max-width: calc(100% + 50px);
    }

    .page-khuyen-mai__promo-card .page-khuyen-mai__figure img {
        border-top-left-radius: 12px;
        border-top-right-radius: 12px;
        border-bottom-left-radius: 0;
        border-bottom-right-radius: 0;
    }

    /* 4. Buttons and button containers (already covered above with .page-khuyen-mai__btn and .page-khuyen-mai__cta-buttons) */

    /* 5. FAQ section */
    .page-khuyen-mai__faq-question {
        font-size: 1em;
        padding: 12px 15px;
    }

    .page-khuyen-mai__faq-toggle {
        font-size: 1.3em;
    }

    .page-khuyen-mai__faq-answer {
        padding: 12px 15px;
        font-size: 0.9em;
    }

    .page-khuyen-mai__faq-item {
        margin-bottom: 10px;
    }
}