/* style/about.css */

/* Biến CSS cho màu sắc */
:root {
    --page-about-primary-color: #007bff;
    --page-about-secondary-color: #ffc107;
    --page-about-text-dark: #212529; /* Màu chữ chính, đủ tương phản với nền sáng */
    --page-about-text-light: #f8f9fa; /* Màu chữ cho nền tối */
    --page-about-bg-light: #f8f9fa; /* Nền sáng */
    --page-about-bg-dark: #0056b3; /* Nền tối, biến thể của primary */
    --page-about-accent-color: #ff8400; /* Màu nhấn, tương phản với primary */
}

.page-about {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    color: var(--page-about-text-dark);
    background-color: var(--page-about-bg-light);
}

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

.page-about__hero {
    background: linear-gradient(135deg, var(--page-about-primary-color), var(--page-about-bg-dark)); /* Sử dụng biến màu */
    color: var(--page-about-text-light);
    padding: 80px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-about__hero-image {
    width: 100%;
    max-width: 800px;
    height: auto;
    margin-top: 30px;
    border-radius: 10px;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
    object-fit: cover;
}

.page-about__title {
    font-size: 3.5em;
    margin-bottom: 15px;
    font-weight: 700;
    color: var(--page-about-text-light);
}

.page-about__subtitle {
    font-size: 1.5em;
    margin-bottom: 30px;
    font-weight: 300;
    color: var(--page-about-text-light);
}

.page-about__section {
    padding: 60px 0;
    background-color: var(--page-about-bg-light);
}

.page-about__section:nth-of-type(odd) {
    background-color: #f0f2f5; /* Nền hơi xám để tạo sự phân biệt */
}

.page-about__heading {
    font-size: 2.8em;
    color: var(--page-about-primary-color);
    text-align: center;
    margin-bottom: 40px;
    position: relative;
}

.page-about__heading::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background-color: var(--page-about-secondary-color);
    margin: 15px auto 0;
    border-radius: 2px;
}

.page-about__sub-heading {
    font-size: 2em;
    color: var(--page-about-primary-color);
    margin-bottom: 20px;
}

.page-about__content-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
    margin-bottom: 40px;
}

.page-about__content-grid--reverse {
    grid-template-columns: 1fr 1fr;
}

.page-about__content-grid--reverse .page-about__image-left {
    order: 2;
}

.page-about__content-grid--reverse .page-about__text-block {
    order: 1;
}

.page-about__text-block p {
    font-size: 1.1em;
    line-height: 1.8;
    color: var(--page-about-text-dark);
}

.page-about__image-right, .page-about__image-left {
    width: 100%;
    height: 300px;
    object-fit: cover;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

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

.page-about__value-item {
    background-color: #fff;
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.page-about__value-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
}

.page-about__value-icon {
    width: 70px;
    height: 70px;
    margin-bottom: 20px;
    object-fit: contain;
}

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

.page-about__value-item p {
    font-size: 1em;
    color: var(--page-about-text-dark);
    line-height: 1.7;
}

.page-about__cta {
    background-color: var(--page-about-primary-color);
    color: var(--page-about-text-light);
    text-align: center;
    padding: 80px 0;
}

.page-about__cta .page-about__heading {
    color: var(--page-about-text-light);
}

.page-about__cta .page-about__heading::after {
    background-color: var(--page-about-secondary-color);
}

.page-about__description {
    font-size: 1.3em;
    margin-bottom: 40px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    color: var(--page-about-text-light);
}

.page-about__button {
    display: inline-block;
    background-color: var(--page-about-secondary-color);
    color: var(--page-about-text-dark);
    padding: 15px 40px;
    border-radius: 50px;
    text-decoration: none;
    font-size: 1.2em;
    font-weight: bold;
    transition: background-color 0.3s ease, transform 0.3s ease;
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.2);
}

.page-about__button:hover {
    background-color: #e6a700; /* Biến thể tối hơn của secondary */
    transform: translateY(-3px);
}

.page-about .highlight {
    color: var(--page-about-secondary-color);
}

.page-about .keyword {
    font-weight: bold;
}

/* Responsive Design */
@media (max-width: 992px) {
    .page-about__title {
        font-size: 2.8em;
    }
    .page-about__subtitle {
        font-size: 1.2em;
    }
    .page-about__heading {
        font-size: 2.2em;
    }
    .page-about__sub-heading {
        font-size: 1.7em;
    }
    .page-about__content-grid {
        grid-template-columns: 1fr;
    }
    .page-about__content-grid--reverse .page-about__image-left {
        order: initial;
    }
    .page-about__content-grid--reverse .page-about__text-block {
        order: initial;
    }
    .page-about__image-right, .page-about__image-left {
        height: 250px;
    }
    .page-about__values-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
}

@media (max-width: 768px) {
    .page-about__hero {
        padding: 60px 0;
    }
    .page-about__title {
        font-size: 2.2em;
    }
    .page-about__subtitle {
        font-size: 1em;
    }
    .page-about__section {
        padding: 40px 0;
    }
    .page-about__heading {
        font-size: 1.8em;
    }
    .page-about__sub-heading {
        font-size: 1.4em;
    }
    .page-about__text-block p {
        font-size: 0.95em;
    }
    .page-about__value-title {
        font-size: 1.3em;
    }
    .page-about__value-item p {
        font-size: 0.9em;
    }
    .page-about__cta {
        padding: 50px 0;
    }
    .page-about__description {
        font-size: 1.1em;
    }
    .page-about__button {
        padding: 12px 30px;
        font-size: 1.1em;
    }
}

@media (max-width: 480px) {
    .page-about__title {
        font-size: 1.8em;
    }
    .page-about__subtitle {
        font-size: 0.9em;
    }
    .page-about__heading {
        font-size: 1.5em;
    }
    .page-about__sub-heading {
        font-size: 1.2em;
    }
    .page-about__image-right, .page-about__image-left {
        height: 200px;
    }
    .page-about__button {
        width: 100%;
        max-width: 280px;
    }
}