header {
    background: linear-gradient(135deg, #2c3e50, #4a6491);
    color: white;
    padding: 20px 20px;
    border-radius: 10px 10px 10px 10px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    margin-bottom: 30px;
    text-align: center;
}

.logo {
    font-size: 2.8rem;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

.logo i {
    color: #4CAF50;
}

header h1 {
    font-size: 2.2rem;
    margin-bottom: 10px;
    font-weight: 600;
}

header p {
    font-size: 1.1rem;
    opacity: 0.9;
    max-width: 800px;
    margin: 0 auto;
}

.content-section {
    background: white;
    border-radius: 10px;
    padding: 30px;
    margin-bottom: 25px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.content-section:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.1);
}

.section-title {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid #eaeaea;
    color: #2c3e50;
}

.section-title i {
    color: #4CAF50;
    font-size: 1.4rem;
}

.section-title h2 {
    font-size: 1.6rem;
    font-weight: 600;
}

.content-section p {
    margin-bottom: 15px;
    font-size: 1.05rem;
    color: #444;
}

.highlight-box {
    background-color: #f1f8ff;
    border-left: 4px solid #4CAF50;
    padding: 20px;
    margin: 20px 0;
    border-radius: 0 8px 8px 0;
}

.source-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 15px;
    margin-top: 20px;
}

.source-item {
    background: #f8f9fa;
    padding: 15px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: all 0.3s ease;
}

.source-item:hover {
    background: #e9ecef;
    transform: translateX(5px);
}

.source-item i {
    color: #4CAF50;
}

.warning-box {
    background-color: #fff3e0;
    border-left: 4px solid #ff9800;
    padding: 20px;
    margin: 20px 0;
    border-radius: 0 8px 8px 0;
}

.contact-info {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    margin-top: 20px;
    padding: 20px;
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    border-radius: 10px;
}

.contact-info i {
    font-size: 1.8rem;
    color: #4CAF50;
}

.contact-info a {
    color: #2c3e50;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: color 0.3s;
}

.contact-info a:hover {
    color: #4CAF50;
}

footer {
    text-align: center;
    margin-top: 40px;
    padding: 20px;
    color: #6c757d;
    border-top: 1px solid #eaeaea;
}

@media (max-width: 768px) {
    .logo {
        font-size: 2.2rem;
    }

    header h1 {
        font-size: 1.8rem;
    }

    .source-list {
        grid-template-columns: 1fr;
    }

    .contact-info {
        flex-direction: column;
        text-align: center;
    }
}