.sng-container {
    max-width: 650px;
    margin: 2rem auto;
    padding: 1.5rem;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    font-family: system-ui, -apple-system, sans-serif;
    border: 1px solid #eee;
}

.sng-heading {
    text-align: center;
    color: #2c3e50;
    margin: 0 0 12px;
    font-size: 1.7rem;
}

.sng-description {
    text-align: center;
    color: #7f8c8d;
    margin-bottom: 1.2rem;
    font-size: 0.95rem;
}

.sng-controls {
    display: flex;
    gap: 10px;
    margin-bottom: 1.4rem;
    flex-wrap: wrap;
}

.sng-input {
    flex: 1;
    min-width: 200px;
    padding: 10px 14px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 16px;
}

.sng-btn {
    padding: 10px 20px;
    background: #3498db;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
}

.sng-btn:hover {
    background: #2980b9;
}

.sng-results {
    display: grid;
    gap: 12px;
}

.sng-result-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px;
    background: #f9f9f9;
    border-radius: 6px;
    font-family: monospace;
    font-size: 15px;
    word-break: break-all;
}

.sng-copy-btn {
    background: #2ecc71;
    color: white;
    border: none;
    padding: 6px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
}

.sng-copy-btn:hover {
    background: #27ae60;
}

.sng-copy-btn.copied {
    background: #3498db;
}