/* Reset mặc định */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body, h1, h2, h3, h4, h5, h6, p, a, span, div, input, textarea, button, th, td, label, ul, ol, li, .card, .stat-number, .value-title, .contact-title, .contact-modal-title, .contact-modal-info, .stat-label {
    font-family: 'Roboto', sans-serif !important;
}

body {
    line-height: 1.6;
    color: #0000;
    background-color: #8bb1d8;
}

/* Container chung */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
    color:#333;
}

/* Banner động đầu trang About */
.masthead, .banner-section {
    min-height: 350px;
    height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 0;
}
.masthead {
    background: linear-gradient(120deg, #6a89cc 0%, #38a3a5 100%);
}
.banner-section {
    background: linear-gradient(120deg, #2563eb 0%, #3498db 100%);
}
.carousel-inner {
    border-radius: 0;
}
.carousel-control-prev-icon,
.carousel-control-next-icon {
    background-color: rgba(0,0,0,0.2);
    border-radius: 50%;
}

@media (max-width: 768px) {
    .masthead, .banner-section {
        min-height: 220px;
        height: 220px;
        padding: 30px 0;
    }
    .masthead h1, .banner-section h2 {
        font-size: 1.5rem;
    }
}

/* Masthead */
.masthead {
    position: relative;
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #fff;
}

.masthead h1 {
    font-size: 2.5rem;
    font-weight: 700;
    text-transform: uppercase;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.divider {
    width: 60px;
    height: 3px;
    background-color: #fff;
    margin: 0 auto;
    border-radius: 2px;
}

/* Section Backgrounds */
.about-content-section,
.mission-vision-section,
.values-section,
.stats-section,
.contact-section {
    background: linear-gradient(180deg, #f8f9fa 0%, #ffffff 100%);
}

/* Card Styles */
.card {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border-radius: 10px;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

/* Mission Vision */
.mission-vision-icon,
.value-icon,
.contact-icon,
.contact-modal-icon {
    font-size: 2rem;
    margin-bottom: 15px;
}

.mission-vision-title,
.value-title,
.contact-title,
.contact-modal-title {
    font-size: 1.25rem;
    color: #333;
}

.mission-vision-text,
.value-description,
.contact-info,
.contact-modal-info p {
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Stats Section */
.stat-number {
    font-size: 2.5rem;
    color: #007bff;
}

.stat-label {
    font-size: 1rem;
    color: #ffff;
}

/* Floating Contact Button */
.floating-contact {
    position: fixed;
    right: 30px;
    z-index: 1000;
}

.contact-button {
    background-color: #007bff;
    color: #fff;
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    cursor: pointer;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease, background-color 0.3s ease;
    animation: pulse 2s infinite;
}

.contact-button:hover {
    background-color: #0056b3;
    transform: scale(1.1);
    animation: none;
}

@keyframes pulse {
    0% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(0, 123, 255, 0.7);
    }

    70% {
        transform: scale(1.05);
        box-shadow: 0 0 0 10px rgba(0, 123, 255, 0);
    }

    100% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(0, 123, 255, 0);
    }
}

.contact-tooltip {
    position: absolute;
    background-color: #333;
    color: #fff;
    padding: 5px 10px;
    border-radius: 5px;
    font-size: 0.9rem;
    right: 60px;
    top: 50%;
    transform: translateY(-50%);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.contact-button:hover+.contact-tooltip {
    opacity: 1;
}

/* Scroll to Top Button */
.scroll-to-top {
    position: fixed;
    bottom: 90px;
    right: 30px;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.scroll-to-top.show {
    opacity: 1;
    visibility: visible;
}

.scroll-button {
    background-color: #6c757d;
    color: #fff;
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    cursor: pointer;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease, background-color 0.3s ease;
}

.scroll-button:hover {
    background-color: #5a6268;
    transform: scale(1.1);
}

.scroll-tooltip {
    position: absolute;
    background-color: #333;
    color: #fff;
    padding: 5px 10px;
    border-radius: 5px;
    font-size: 0.9rem;
    right: 60px;
    top: 50%;
    transform: translateY(-50%);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.scroll-button:hover+.scroll-tooltip {
    opacity: 1;
}

/* Contact Modal */
.contact-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    align-items: center;
    justify-content: center;
}

.contact-modal.show {
    display: flex;
}

.contact-modal-content {
    background-color: #fff;
    border-radius: 10px;
    padding: 30px;
    max-width: 500px;
    width: 90%;
    position: relative;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
    opacity: 0;
    transform: scale(0.8);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.contact-modal.show .contact-modal-content {
    opacity: 1;
    transform: scale(1);
}

.contact-modal-close {
    position: absolute;
    top: 15px;
    right: 15px;
    background: none;
    border: none;
    font-size: 1.2rem;
    color: #666;
    cursor: pointer;
    transition: color 0.3s ease;
}

.contact-modal-close:hover {
    color: #333;
}

.contact-modal-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 20px;
    text-align: center;
}

.contact-modal-item {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.contact-modal.show .contact-modal-item {
    opacity: 1;
    transform: translateY(0);
}

.contact-modal-item:nth-child(1) {
    transition-delay: 0.1s;
}

.contact-modal-item:nth-child(2) {
    transition-delay: 0.2s;
}

.contact-modal-item:nth-child(3) {
    transition-delay: 0.3s;
}

.contact-modal-item:nth-child(4) {
    transition-delay: 0.4s;
}

.contact-modal-icon {
    font-size: 1.5rem;
    color: #007bff;
    margin-right: 15px;
}

.contact-modal-info h4 {
    font-size: 1.2rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 5px;
}

.contact-modal-info p {
    font-size: 0.95rem;
    color: #6c757d;
}

/* Responsive */
@media (max-width: 768px) {
    .masthead h1 {
        font-size: 2rem;
    }

    .masthead {
        height: 40vh;
    }

    .stat-number {
        font-size: 2rem;
    }

    .contact-modal-content {
        width: 95%;
        padding: 20px;
    }
}

@media (max-width: 576px) {
    .masthead h1 {
        font-size: 1.5rem;
    }

    .masthead {
        height: 30vh;
    }

    .contact-button,
    .scroll-button {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }

    .contact-tooltip,
    .scroll-tooltip {
        right: 50px;
    }
}