.page-su-kien {
    --primary-color: #FF8C1A;
    --secondary-color: #FFA53A;
    --card-bg-color: #17191F;
    --bg-color: #0D0E12;
    --text-main-color: #FFF3E6;
    --border-color: #A84F0C;
    --glow-color: #FFB04D;
    --deep-orange: #D96800;

    font-family: Arial, sans-serif;
    color: var(--text-main-color); /* Light text for dark body background */
    line-height: 1.6;
    background-color: var(--bg-color);
}

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

.page-su-kien__highlight-text {
    color: var(--secondary-color);
    font-weight: bold;
}

/* Hero Section */
.page-su-kien__hero-section {
    padding-top: 10px; /* Small top padding, body handles --header-offset */
    margin-bottom: 40px;
    position: relative;
    overflow: hidden;
}

.page-su-kien__hero-content-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.page-su-kien__hero-image {
    width: 100%;
    max-width: 100%;
    height: auto;
    display: block;
    border-radius: 10px;
    box-shadow: 0 0 20px var(--glow-color);
    object-fit: cover;
}

.page-su-kien__hero-text-block {
    text-align: center;
    padding: 20px 0;
}

.page-su-kien__main-title {
    font-size: 3.2em;
    font-weight: bold;
    color: var(--secondary-color);
    margin-bottom: 15px;
    line-height: 1.2;
    text-shadow: 0 0 10px rgba(255, 165, 58, 0.5);
}

.page-su-kien__hero-description {
    font-size: 1.2em;
    color: var(--text-main-color);
    margin-bottom: 30px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* Buttons */
.page-su-kien__btn-primary,
.page-su-kien__btn-secondary,
.page-su-kien__btn-small {
    display: inline-block;
    padding: 12px 25px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: bold;
    font-size: 1.1em;
    transition: all 0.3s ease;
    cursor: pointer;
    text-align: center;
    max-width: 100%;
    box-sizing: border-box;
    white-space: normal;
    word-wrap: break-word;
}

.page-su-kien__btn-primary {
    background: linear-gradient(180deg, var(--secondary-color) 0%, var(--deep-orange) 100%);
    color: #ffffff;
    border: 2px solid var(--secondary-color);
    box-shadow: 0 5px 15px rgba(255, 165, 58, 0.4);
}

.page-su-kien__btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(255, 165, 58, 0.6);
    opacity: 0.9;
}

.page-su-kien__btn-secondary {
    background: transparent;
    color: var(--secondary-color);
    border: 2px solid var(--secondary-color);
    box-shadow: 0 5px 15px rgba(255, 165, 58, 0.2);
    margin-left: 20px;
}

.page-su-kien__btn-secondary:hover {
    transform: translateY(-3px);
    background: var(--secondary-color);
    color: var(--bg-color);
    box-shadow: 0 8px 20px rgba(255, 165, 58, 0.4);
}

.page-su-kien__btn-small {
    font-size: 0.9em;
    padding: 8px 18px;
    border-radius: 5px;
    background: linear-gradient(180deg, var(--secondary-color) 0%, var(--deep-orange) 100%);
    color: #ffffff;
    border: 1px solid var(--secondary-color);
    box-shadow: 0 3px 10px rgba(255, 165, 58, 0.3);
}

.page-su-kien__btn-small:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 12px rgba(255, 165, 58, 0.5);
    opacity: 0.9;
}

/* General Section Styles */
.page-su-kien__intro-section,
.page-su-kien__featured-events,
.page-su-kien__upcoming-events,
.page-su-kien__how-to-participate,
.page-su-kien__faq-section,
.page-su-kien__cta-bottom-section {
    padding: 50px 0;
    margin-bottom: 20px;
}

.page-su-kien__section-title {
    font-size: 2.5em;
    color: var(--secondary-color);
    text-align: center;
    margin-bottom: 40px;
    text-shadow: 0 0 8px rgba(255, 165, 58, 0.4);
}

.page-su-kien__sub-title {
    font-size: 1.8em;
    color: var(--primary-color);
    margin-top: 30px;
    margin-bottom: 20px;
    text-align: center;
}

.page-su-kien__text-block {
    font-size: 1.1em;
    color: var(--text-main-color);
    margin-bottom: 20px;
    text-align: justify;
}

/* Intro Section */
.page-su-kien__list {
    list-style: none;
    padding: 0;
    margin-bottom: 30px;
}

.page-su-kien__list-item {
    background-color: var(--card-bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 15px 20px;
    margin-bottom: 10px;
    font-size: 1.05em;
    color: var(--text-main-color);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.page-su-kien__list-item strong {
    color: var(--secondary-color);
}

/* Featured Events */
.page-su-kien__event-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.page-su-kien__event-card {
    background-color: var(--card-bg-color);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.4);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid var(--border-color);
}

.page-su-kien__event-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(255, 165, 58, 0.4);
}

.page-su-kien__event-card-image {
    width: 100%;
    height: 250px;
    object-fit: cover;
    display: block;
}

.page-su-kien__event-card-content {
    padding: 20px;
}

.page-su-kien__event-card-title {
    font-size: 1.5em;
    color: var(--secondary-color);
    margin-bottom: 10px;
    line-height: 1.3;
}

.page-su-kien__event-card-date {
    font-size: 0.9em;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.page-su-kien__event-card-description {
    font-size: 1em;
    color: var(--text-main-color);
    margin-bottom: 20px;
}

/* Upcoming Events */
.page-su-kien__event-list {
    list-style: none;
    padding: 0;
    max-width: 800px;
    margin: 0 auto 30px auto;
}

.page-su-kien__event-list-item {
    background-color: var(--card-bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 15px 20px;
    margin-bottom: 15px;
    font-size: 1.1em;
    color: var(--text-main-color);
    display: flex;
    align-items: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.page-su-kien__event-list-date {
    font-weight: bold;
    color: var(--primary-color);
    margin-right: 15px;
    min-width: 150px;
}

/* How to Participate */
.page-su-kien__steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.page-su-kien__step-card {
    background-color: var(--card-bg-color);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.4);
    border: 1px solid var(--border-color);
    text-align: center;
    padding-bottom: 20px;
}

.page-su-kien__step-card-image {
    width: 100%;
    height: 220px;
    object-fit: cover;
    display: block;
    margin-bottom: 15px;
}

.page-su-kien__step-card-content {
    padding: 0 20px;
}

.page-su-kien__step-card-title {
    font-size: 1.6em;
    color: var(--secondary-color);
    margin-bottom: 10px;
}

.page-su-kien__step-card-description {
    font-size: 1em;
    color: var(--text-main-color);
}

/* FAQ Section */
.page-su-kien__faq-list {
    max-width: 900px;
    margin: 0 auto 40px auto;
}

.page-su-kien__faq-item {
    background-color: var(--card-bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 15px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.page-su-kien__faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    font-size: 1.2em;
    font-weight: bold;
    color: var(--primary-color);
    cursor: pointer;
    list-style: none;
}

.page-su-kien__faq-question::-webkit-details-marker {
    display: none;
}

.page-su-kien__faq-toggle {
    font-size: 1.5em;
    line-height: 1;
    transition: transform 0.3s ease;
}

.page-su-kien__faq-item[open] .page-su-kien__faq-toggle {
    transform: rotate(45deg);
}

.page-su-kien__faq-answer {
    padding: 0 20px 15px;
    font-size: 1em;
    color: var(--text-main-color);
    border-top: 1px solid rgba(var(--border-color), 0.5);
    margin-top: 10px;
}

.page-su-kien__faq-answer p {
    margin-top: 10px;
    margin-bottom: 0;
}

.page-su-kien__faq-answer a {
    color: var(--secondary-color);
    text-decoration: none;
}

.page-su-kien__faq-answer a:hover {
    text-decoration: underline;
}

/* CTA Bottom Section */
.page-su-kien__cta-bottom-section {
    text-align: center;
    background-color: var(--card-bg-color);
    padding: 60px 20px;
    border-top: 2px solid var(--primary-color);
    border-bottom: 2px solid var(--primary-color);
    box-shadow: 0 0 20px rgba(255, 140, 26, 0.5);
}

.page-su-kien__cta-bottom-section .page-su-kien__section-title {
    color: var(--secondary-color);
    margin-bottom: 20px;
}

.page-su-kien__cta-bottom-section .page-su-kien__text-block {
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: 30px;
}

.page-su-kien__cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    overflow: hidden;
}

/* Responsive Styles */
@media (max-width: 1024px) {
    .page-su-kien__main-title {
        font-size: 2.8em;
    }

    .page-su-kien__section-title {
        font-size: 2em;
    }

    .page-su-kien__event-card-image {
        height: 200px;
    }

    .page-su-kien__step-card-image {
        height: 180px;
    }

    .page-su-kien__event-card-title {
        font-size: 1.3em;
    }

    .page-su-kien__step-card-title {
        font-size: 1.4em;
    }
}

@media (max-width: 768px) {
    .page-su-kien__hero-section {
        padding-top: 10px !important;
    }

    .page-su-kien__hero-content-wrapper {
        padding: 15px;
    }

    .page-su-kien__main-title {
        font-size: 2em !important;
        margin-bottom: 10px !important;
    }

    .page-su-kien__hero-description {
        font-size: 1em !important;
        margin-bottom: 20px !important;
    }

    .page-su-kien__btn-primary,
    .page-su-kien__btn-secondary {
        font-size: 1em !important;
        padding: 10px 20px !important;
        margin-left: 0 !important;
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
    }

    .page-su-kien__btn-small {
        font-size: 0.8em !important;
        padding: 6px 15px !important;
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
    }

    .page-su-kien__cta-buttons {
        flex-direction: column !important;
        gap: 15px !important;
        padding: 0 15px;
    }

    .page-su-kien__container {
        padding: 15px;
    }

    .page-su-kien__section-title {
        font-size: 1.8em !important;
        margin-bottom: 30px !important;
    }

    .page-su-kien__sub-title {
        font-size: 1.5em !important;
    }

    .page-su-kien__text-block {
        font-size: 1em !important;
    }

    .page-su-kien img {
        max-width: 100% !important;
        width: 100% !important;
        height: auto !important;
        display: block !important;
    }

    .page-su-kien__event-grid,
    .page-su-kien__steps-grid {
        grid-template-columns: 1fr !important;
        gap: 20px !important;
    }

    .page-su-kien__event-card-image {
        height: 180px !important;
    }

    .page-su-kien__step-card-image {
        height: 160px !important;
    }

    .page-su-kien__event-list-item {
        flex-direction: column;
        align-items: flex-start;
        padding: 10px 15px;
    }

    .page-su-kien__event-list-date {
        margin-bottom: 5px;
        min-width: unset;
    }

    .page-su-kien__faq-question {
        font-size: 1.1em !important;
        padding: 12px 15px !important;
    }

    .page-su-kien__faq-answer {
        padding: 0 15px 12px !important;
    }

    /* Ensure all content containers are responsive */
    .page-su-kien__intro-section,
    .page-su-kien__featured-events,
    .page-su-kien__upcoming-events,
    .page-su-kien__how-to-participate,
    .page-su-kien__faq-section,
    .page-su-kien__cta-bottom-section {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        padding-left: 15px;
        padding-right: 15px;
    }
    .page-su-kien__event-card,
    .page-su-kien__step-card,
    .page-su-kien__faq-item {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
    }
}