* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, sans-serif;
}

body {
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.5;
    padding: 15px;
    max-width: 800px;
    margin: 0 auto;
    font-size: 14px;
}

header {
    text-align: center;
    margin-bottom: 30px;
    padding-top: 15px;
}

h1 {
    font-size: 2.2rem;
    color: #2c3e50;
    margin-bottom: 8px;
    position: relative;
    display: inline-block;
}

h1:after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background-color: #3498db;
    border-radius: 2px;
}

.description {
    font-size: 0.95rem;
    color: #7f8c8d;
    max-width: 500px;
    margin: 15px auto 0;
}

section {
    background-color: white;
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 3px 5px rgba(0, 0, 0, 0.05);
}

h2 {
    color: #2c3e50;
    margin-bottom: 15px;
    padding-bottom: 8px;
    border-bottom: 1px solid #f0f0f0;
    display: flex;
    align-items: center;
    font-size: 1.3rem;
}

h2 i {
    margin-right: 8px;
    color: #3498db;
    font-size: 1.1rem;
}

.project-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.project {
    background-color: #f8f9fa;
    border-left: 3px solid #3498db;
    padding: 15px;
    border-radius: 0 6px 6px 0;
}

.project-title {
    font-size: 1.1rem;
    margin-bottom: 6px;
}

.project-title a {
    color: #2c3e50;
    text-decoration: none;
    font-weight: 600;
}

.project-title a:hover {
    color: #3498db;
    text-decoration: underline;
}

.project-description {
    color: #555;
    font-size: 0.9rem;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 15px;
}

.contact-label {
    font-weight: 600;
    min-width: 90px;
    color: #2c3e50;
    font-size: 0.9rem;
}

.contact-value {
    flex: 1;
}

.contact-value a {
    color: #3498db;
    text-decoration: none;
    word-break: break-all;
    font-size: 0.9rem;
}

.contact-value a:hover {
    text-decoration: underline;
}

.usdt-address {
    background-color: #f8f9fa;
    padding: 8px;
    border-radius: 4px;
    font-family: monospace;
    word-break: break-all;
    margin-top: 5px;
    font-size: 0.85rem;
}

button {
    background-color: #3498db;
    color: white;
    border: none;
    padding: 6px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 600;
    transition: background-color 0.2s;
}

button:hover {
    background-color: #2980b9;
}

.copy-btn {
    background-color: #27ae60;
    margin-left: 8px;
    padding: 4px 8px;
    font-size: 0.8rem;
}

.copy-btn:hover {
    background-color: #219653;
}

footer {
    text-align: center;
    margin-top: 30px;
    padding-top: 15px;
    border-top: 1px solid #eee;
    color: #7f8c8d;
    font-size: 0.85rem;
}

@media (max-width: 768px) {
    body {
        padding: 10px;
    }
    
    h1 {
        font-size: 1.8rem;
    }
    
    section {
        padding: 15px;
    }
    
    .contact-item {
        flex-direction: column;
    }
    
    .contact-label {
        margin-bottom: 4px;
        min-width: auto;
    }
}