/* style/about.css */

/* Biến CSS */
:root {
    --page-about-primary-color: #0A2540;
    --page-about-secondary-color: #FFD700;
    --page-about-text-dark: #333;
    --page-about-text-light: #fff;
    --page-about-bg-light: #f9f9f9;
    --page-about-bg-dark: #071a2e;
    --page-about-accent-color: #f5dabf; /* Dựa trên màu bổ trợ của primary */
    --page-about-focus-color: #0028ff; /* Dựa trên màu bổ trợ của secondary */
}

.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) 0%, #1a3e61 100%); /* Slightly lighter blue for gradient */
    color: var(--page-about-text-light);
    padding: 100px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-about__hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at center, rgba(255, 215, 0, 0.1) 0%, transparent 70%);
    animation: page-about-hero-animate 20s infinite linear;
}

@keyframes page-about-hero-animate {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.page-about__title {
    font-size: 3.5em;
    margin-bottom: 20px;
    color: var(--page-about-secondary-color);
    position: relative;
    z-index: 1;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.page-about__subtitle {
    font-size: 1.3em;
    margin-bottom: 40px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    position: relative;
    z-index: 1;
    opacity: 0.9;
}

.page-about__hero-actions {
    display: flex;
    justify-content: center;
    gap: 20px;
    position: relative;
    z-index: 1;
}

.page-about__btn {
    display: inline-block;
    padding: 15px 30px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: bold;
    transition: all 0.3s ease;
    font-size: 1.1em;
    cursor: pointer;
    border: none;
}

.page-about__btn--primary {
    background-color: var(--page-about-secondary-color);
    color: var(--page-about-primary-color);
}

.page-about__btn--primary:hover {
    background-color: #e6c200; /* Darker gold */
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(255, 215, 0, 0.3);
}

.page-about__btn--secondary {
    background-color: transparent;
    color: var(--page-about-secondary-color);
    border: 2px solid var(--page-about-secondary-color);
}

.page-about__btn--secondary:hover {
    background-color: var(--page-about-secondary-color);
    color: var(--page-about-primary-color);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(255, 215, 0, 0.3);
}

.page-about__section {
    padding: 80px 0;
    background-color: var(--page-about-bg-light);
}

.page-about__section:nth-of-type(even) {
    background-color: var(--page-about-bg-dark);
    color: var(--page-about-text-light);
}

.page-about__section:nth-of-type(even) .page-about__section-title,
.page-about__section:nth-of-type(even) .page-about__card-title {
    color: var(--page-about-secondary-color);
}

.page-about__section:nth-of-type(even) .page-about__text-content p,
.page-about__section:nth-of-type(even) .page-about__text-content ul li {
    color: rgba(255, 255, 255, 0.8);
}

.page-about__section-title {
    font-size: 2.8em;
    color: var(--page-about-primary-color);
    text-align: center;
    margin-bottom: 40px;
    position: relative;
    padding-bottom: 15px;
}

.page-about__section-title::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: 0;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background-color: var(--page-about-secondary-color);
    border-radius: 2px;
}

.page-about__section-description {
    font-size: 1.1em;
    text-align: center;
    max-width: 900px;
    margin: -20px auto 60px auto;
    color: #666;
}

.page-about__section:nth-of-type(even) .page-about__section-description {
    color: rgba(255, 255, 255, 0.7);
}

.page-about__grid {
    display: grid;
    gap: 40px;
    align-items: center;
}

.page-about__grid--2-col {
    grid-template-columns: 1fr 1fr;
}

.page-about__grid--3-col {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.page-about__text-content p {
    margin-bottom: 15px;
    font-size: 1.05em;
    line-height: 1.7;
}

.page-about__text-content ul {
    list-style: none;
    padding-left: 0;
    margin-bottom: 20px;
}

.page-about__text-content ul li {
    position: relative;
    padding-left: 25px;
    margin-bottom: 10px;
    font-size: 1.05em;
}

.page-about__text-content ul li::before {
    content: '✔';
    position: absolute;
    left: 0;
    color: var(--page-about-secondary-color);
    font-weight: bold;
}

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

.page-about__image {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.page-about__image:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.2);
}

.page-about__value-card {
    background-color: var(--page-about-bg-dark);
    color: var(--page-about-text-light);
    padding: 30px;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.page-about__section:nth-of-type(even) .page-about__value-card {
    background-color: var(--page-about-primary-color);
}

.page-about__value-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 30px rgba(0,0,0,0.2);
}

.page-about__value-icon {
    width: 60px;
    height: 60px;
    margin-bottom: 20px;
    /* NO CSS FILTER ALLOWED HERE */
}

.page-about__card-title {
    font-size: 1.6em;
    color: var(--page-about-secondary-color);
    margin-bottom: 15px;
}

.page-about__value-card p {
    font-size: 0.95em;
    line-height: 1.6;
    opacity: 0.8;
}

.page-about__cta {
    background: linear-gradient(45deg, var(--page-about-secondary-color) 0%, #e6c200 100%);
    color: var(--page-about-primary-color);
    padding: 80px 0;
    text-align: center;
}

.page-about__cta-title {
    font-size: 3em;
    margin-bottom: 20px;
    color: var(--page-about-primary-color);
    text-shadow: 1px 1px 2px rgba(0,0,0,0.1);
}

.page-about__cta-description {
    font-size: 1.2em;
    margin-bottom: 40px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    color: #444;
}

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

.page-about__cta .page-about__btn--primary {
    background-color: var(--page-about-primary-color);
    color: var(--page-about-secondary-color);
}

.page-about__cta .page-about__btn--primary:hover {
    background-color: #071a2e; /* Darker primary */
    box-shadow: 0 5px 15px rgba(10, 37, 64, 0.3);
}

.page-about__cta .page-about__btn--secondary {
    background-color: transparent;
    color: var(--page-about-primary-color);
    border: 2px solid var(--page-about-primary-color);
}

.page-about__cta .page-about__btn--secondary:hover {
    background-color: var(--page-about-primary-color);
    color: var(--page-about-secondary-color);
    box-shadow: 0 5px 15px rgba(10, 37, 64, 0.3);
}

/* Responsive Design */
@media (max-width: 992px) {
    .page-about__grid--2-col {
        grid-template-columns: 1fr;
    }
    .page-about__grid--reverse-on-mobile {
        grid-template-columns: 1fr;
        flex-direction: column-reverse;
    }
    .page-about__text-content {
        order: 2;
    }
    .page-about__image-wrapper {
        order: 1;
        margin-bottom: 30px;
    }
    .page-about__title {
        font-size: 2.5em;
    }
    .page-about__section-title {
        font-size: 2.2em;
    }
    .page-about__cta-title {
        font-size: 2.5em;
    }
}

@media (max-width: 768px) {
    .page-about__hero,
    .page-about__section,
    .page-about__cta {
        padding: 60px 0;
    }
    .page-about__hero-actions,
    .page-about__cta-actions {
        flex-direction: column;
        gap: 15px;
    }
    .page-about__btn {
        width: 80%;
        max-width: 300px;
        margin: 0 auto;
    }
    .page-about__title {
        font-size: 2em;
    }
    .page-about__subtitle {
        font-size: 1.1em;
    }
    .page-about__section-title {
        font-size: 1.8em;
    }
    .page-about__section-description {
        font-size: 1em;
    }
    .page-about__cta-title {
        font-size: 2em;
    }
    .page-about__cta-description {
        font-size: 1.1em;
    }
}

@media (max-width: 480px) {
    .page-about__title {
        font-size: 1.8em;
    }
    .page-about__section-title {
        font-size: 1.6em;
    }
    .page-about__cta-title {
        font-size: 1.8em;
    }
    .page-about__btn {
        padding: 12px 20px;
        font-size: 1em;
    }
}