:root {
    --primary-color: #11A84E;
    --secondary-color: #22C768;
    --button-gradient: linear-gradient(180deg, #2AD16F 0%, #13994A 100%);
    --card-bg: #11271B;
    --page-bg: #08160F;
    --text-main: #F2FFF6;
    --text-secondary: #A7D9B8;
    --border-color: #2E7A4E;
    --glow-color: #57E38D;
    --gold-color: #F2C14E;
    --divider-color: #1E3A2A;
    --deep-green: #0A4B2C;
}

.page-about {
    font-family: 'Arial', sans-serif;
    color: var(--text-main); /* Default text color for the page content */
    background-color: var(--page-bg); /* Page background color */
    line-height: 1.6;
}

.page-about__container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    box-sizing: border-box;
}

.page-about__hero-section {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding-top: 10px; /* Small decorative top padding, body handles header offset */
    padding-bottom: 60px;
}

.page-about__hero-image-wrapper {
    width: 100%;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.page-about__hero-image {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
    max-height: 700px;
    filter: brightness(0.7);
}

.page-about__hero-content-wrapper {
    position: absolute;
    top: 50%;
    left: 0;
    width: 100%;
    transform: translateY(-50%);
    z-index: 10;
    text-align: center;
    padding: 0 20px;
    box-sizing: border-box;
}

.page-about__main-title {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    color: var(--text-main);
    margin-bottom: 20px;
    font-weight: 700;
    line-height: 1.2;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.page-about__hero-description {
    font-size: clamp(1rem, 2vw, 1.3rem);
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto 30px;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.4);
}

.page-about__cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.page-about__btn-primary,
.page-about__btn-secondary {
    display: inline-block;
    padding: 15px 30px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 700;
    transition: all 0.3s ease;
    box-sizing: border-box;
    max-width: 100%;
    white-space: normal;
    word-wrap: break-word;
    text-align: center;
}

.page-about__btn-primary {
    background: var(--button-gradient);
    color: #ffffff;
    border: 2px solid transparent;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.page-about__btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.page-about__btn-secondary {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.page-about__btn-secondary:hover {
    background-color: var(--primary-color);
    color: #ffffff;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.page-about__section {
    padding: 60px 0;
}

.page-about__section-title {
    font-size: clamp(2rem, 4vw, 2.8rem);
    color: var(--text-main);
    text-align: center;
    margin-bottom: 40px;
    font-weight: 700;
}

.page-about__section-title--light {
    color: var(--text-main);
}

.page-about__text-block {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
    text-align: justify;
}

.page-about__text-block--light {
    color: var(--text-main);
}

.page-about__flex-group {
    display: flex;
    align-items: center;
    gap: 40px;
    margin-bottom: 60px;
}

.page-about__flex-group--reverse {
    flex-direction: row-reverse;
}

.page-about__content-card,
.page-about__image-card {
    flex: 1;
    min-width: 300px;
}

.page-about__content-card {
    background-color: var(--card-bg);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
}

.page-about__card-title {
    font-size: clamp(1.5rem, 3vw, 2.2rem);
    color: var(--primary-color);
    margin-bottom: 20px;
    font-weight: 700;
}

.page-about__card-image {
    width: 100%;
    height: auto;
    border-radius: 12px;
    display: block;
    object-fit: cover;
}

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

.page-about__value-item {
    padding: 25px;
    text-align: center;
}

.page-about__value-title {
    font-size: 1.4rem;
    color: var(--primary-color);
    margin-bottom: 10px;
    font-weight: 600;
}

.page-about__value-description {
    font-size: 1rem;
    color: var(--text-secondary);
}

.page-about__image-wrapper--center {
    text-align: center;
}

.page-about__main-image {
    width: 100%;
    max-width: 800px;
    height: auto;
    border-radius: 12px;
    display: block;
    margin: 0 auto;
}

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

.page-about__feature-item {
    padding: 30px;
}

.page-about__feature-title {
    font-size: 1.6rem;
    color: var(--primary-color);
    margin-bottom: 15px;
    font-weight: 600;
}

.page-about__feature-description {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-bottom: 15px;
}

.page-about__game-types {
    list-style: none;
    padding: 0;
    margin-top: 15px;
}

.page-about__game-types li {
    margin-bottom: 8px;
    font-size: 1rem;
}

.page-about__game-types li a {
    color: var(--text-main);
    text-decoration: none;
    transition: color 0.3s ease;
}

.page-about__game-types li a:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

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

.page-about__faq-item {
    background-color: var(--card-bg);
    border-radius: 8px;
    margin-bottom: 15px;
    overflow: hidden;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.15);
}

.page-about__faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 25px;
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-main);
    cursor: pointer;
    background-color: var(--deep-green);
    border-bottom: 1px solid var(--divider-color);
    list-style: none;
}

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

.page-about__faq-qtext {
    flex-grow: 1;
    margin-right: 15px;
}

.page-about__faq-toggle {
    font-size: 1.5rem;
    line-height: 1;
    transition: transform 0.3s ease;
}

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

.page-about__faq-answer {
    padding: 0 25px 20px;
    font-size: 1.05rem;
    color: var(--text-secondary);
}

.page-about__faq-answer p {
    margin-top: 15px;
}

.page-about__cta-bottom {
    background: var(--deep-green);
    text-align: center;
    padding: 80px 0;
}

.page-about__cta-content {
    max-width: 800px;
}

.page-about__btn-primary--large {
    font-size: 1.2rem;
    padding: 18px 35px;
    margin-top: 30px;
}

.page-about a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

.page-about a:hover {
    color: var(--glow-color);
    text-decoration: underline;
}

/* Responsive Styles */
@media (max-width: 992px) {
    .page-about__flex-group {
        flex-direction: column;
    }
    .page-about__flex-group--reverse {
        flex-direction: column;
    }
    .page-about__hero-content-wrapper {
      position: static;
      transform: none;
      padding-top: 40px;
      background: rgba(8, 22, 15, 0.8);
      margin-top: -100px;
      padding-bottom: 40px;
    }
    .page-about__hero-image {
        max-height: 400px;
    }
}

@media (max-width: 768px) {
    .page-about__hero-section {
        padding-bottom: 40px;
    }
    .page-about__hero-content-wrapper {
        padding: 20px 0;
    }
    .page-about__main-title {
        font-size: 2rem;
    }
    .page-about__hero-description {
        font-size: 1rem;
    }
    .page-about__section {
        padding: 40px 0;
    }
    .page-about__section-title {
        font-size: 1.8rem;
        margin-bottom: 30px;
    }
    .page-about__text-block {
        font-size: 1rem;
    }
    .page-about__content-card {
        padding: 20px;
    }
    .page-about__card-title {
        font-size: 1.4rem;
    }
    .page-about__value-title {
        font-size: 1.2rem;
    }
    .page-about__feature-title {
        font-size: 1.3rem;
    }
    .page-about__faq-question {
        font-size: 1.1rem;
        padding: 15px 20px;
    }
    .page-about__faq-answer {
        padding: 0 20px 15px;
    }
    .page-about__btn-primary,
    .page-about__btn-secondary {
        padding: 12px 20px;
        font-size: 0.95rem;
    }
    .page-about__cta-buttons {
        flex-direction: column;
        gap: 15px;
    }
    .page-about__cta-bottom {
        padding: 60px 0;
    }
    .page-about__btn-primary--large {
        padding: 15px 25px;
        font-size: 1.1rem;
    }

    /* Mobile image, video, button responsiveness */
    .page-about img {
        max-width: 100% !important;
        width: 100% !important;
        height: auto !important;
        display: block !important;
    }
    .page-about video,
    .page-about__video {
        max-width: 100% !important;
        width: 100% !important;
        height: auto !important;
        display: block !important;
    }
    .page-about__section,
    .page-about__card,
    .page-about__container,
    .page-about__video-section,
    .page-about__video-container,
    .page-about__video-wrapper,
    .page-about__cta-buttons,
    .page-about__button-group,
    .page-about__btn-container {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        padding-left: 15px;
        padding-right: 15px;
        overflow: hidden !important;
    }
    .page-about__cta-button,
    .page-about__btn-primary,
    .page-about__btn-secondary,
    .page-about a[class*="button"],
    .page-about 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;
        padding-right: 15px;
    }
    .page-about__cta-buttons {
        flex-wrap: wrap !important;
        gap: 10px;
    }
    .page-about__video-section {
        padding-top: 10px !important; /* body đã xử lý --header-offset */
    }
}