/* Reset và thiết lập cơ bản */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Poppins', sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    backdrop-filter: blur(10px);
}

/* Header */
.header {
    text-align: center;
    padding: 40px 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.header p {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* Grid layout */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
}

@media (max-width: 768px) {
    .contact-grid {
        grid-template-columns: 1fr;
    }
}

/* Contact Section */
.contact-section {
    padding: 40px;
    border-right: 1px solid #eee;
}

@media (max-width: 768px) {
    .contact-section {
        border-right: none;
        border-bottom: 1px solid #eee;
    }
}

.contact-section h2 {
    color: #667eea;
    margin-bottom: 30px;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.contact-item {
    display: flex;
    align-items: center;
    margin-bottom: 25px;
    padding: 15px;
    background: #f8f9ff;
    border-radius: 10px;
    transition: all 0.3s ease;
}

.contact-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.1);
}

.contact-item i {
    font-size: 1.5rem;
    color: #667eea;
    margin-right: 15px;
    width: 30px;
    text-align: center;
}

.contact-info {
    display: flex;
    flex-direction: column;
}

.contact-info .label {
    font-size: 0.85rem;
    color: #666;
    margin-bottom: 3px;
    text-transform: uppercase;
    font-weight: 500;
}

.contact-info .value {
    font-size: 1rem;
    color: #333;
    font-weight: 500;
    text-decoration: none;
}

.contact-info .value:hover {
    color: #667eea;
}

/* Donate Section */
.donate-section {
    padding: 40px;
    background: #f8f9ff;
}

.donate-section h2 {
    color: #e74c3c;
    margin-bottom: 20px;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.donate-description {
    margin-bottom: 30px;
    color: #666;
    font-size: 1rem;
    line-height: 1.6;
}

.bank-info {
    margin-bottom: 30px;
}

.bank-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 20px;
    padding: 20px;
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.bank-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.bank-item i {
    font-size: 1.5rem;
    color: #e74c3c;
    margin-right: 15px;
    margin-top: 5px;
}

.bank-details {
    display: flex;
    flex-direction: column;
}

.bank-name {
    font-weight: 600;
    color: #333;
    margin-bottom: 5px;
}

.account-number {
    font-size: 1.1rem;
    font-weight: 700;
    color: #e74c3c;
    margin-bottom: 3px;
    font-family: 'Courier New', monospace;
}

.account-name {
    font-size: 0.9rem;
    color: #666;
    text-transform: uppercase;
}

/* QR Section */
.qr-section {
    margin-top: 30px;
}

.qr-section h3 {
    color: #333;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.qr-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.qr-code {
    text-align: center;
    padding: 20px;
    background: white;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.qr-code:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.qr-code img {
    width: 150px;
    height: 150px;
    border-radius: 10px;
    margin-bottom: 10px;
}

.qr-code p {
    font-weight: 600;
    color: #333;
}

/* Social Section */
.social-section {
    padding: 30px 40px;
    text-align: center;
    border-top: 1px solid #eee;
}

.social-section h3 {
    color: #333;
    margin-bottom: 20px;
    font-size: 1.3rem;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.social-link {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-decoration: none;
    border-radius: 25px;
    transition: all 0.3s ease;
    font-weight: 500;
}

.social-link:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.3);
}

.social-link i {
    font-size: 1.2rem;
}

/* Footer */
.footer {
    text-align: center;
    padding: 30px;
    background: #f8f9ff;
    color: #666;
    font-size: 1.1rem;
}

/* Responsive design */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }
    
    .header h1 {
        font-size: 2rem;
    }
    
    .contact-section,
    .donate-section {
        padding: 30px 20px;
    }
    
    .contact-item {
        flex-direction: column;
        text-align: center;
        gap: 10px;
    }
    
    .contact-item i {
        margin-right: 0;
        margin-bottom: 10px;
    }
    
    .qr-container {
        grid-template-columns: 1fr;
    }
    
    .social-links {
        flex-direction: column;
        align-items: center;
    }
    
    .social-link {
        width: 200px;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .header {
        padding: 30px 15px;
    }
    
    .header h1 {
        font-size: 1.8rem;
    }
    
    .contact-section,
    .donate-section {
        padding: 20px 15px;
    }
    
    .qr-code img {
        width: 120px;
        height: 120px;
    }
}

/* Animation cho tải trang */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.contact-item,
.bank-item,
.qr-code {
    animation: fadeInUp 0.6s ease forwards;
}

.contact-item:nth-child(2) { animation-delay: 0.1s; }
.contact-item:nth-child(3) { animation-delay: 0.2s; }
.contact-item:nth-child(4) { animation-delay: 0.3s; }
.contact-item:nth-child(5) { animation-delay: 0.4s; }
.contact-item:nth-child(6) { animation-delay: 0.5s; }