.tool-container {
    background: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    border: 1px solid #eee;
}

.main-input {
    width: 100%;
    height: 300px;
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.95rem;
    box-sizing: border-box;
    margin-bottom: 15px;
}

.control-panel {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.btn-group {
    display: flex;
    gap: 10px;
}

.btn {
    padding: 12px 20px;
    background: #333f47;
    color: #fff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: bold;
}

.btn-secondary { background: #27ae60; }
.btn-clear { background: #999; }

.status-msg {
    margin-top: 15px;
    font-size: 0.9rem;
    min-height: 1.2em;
    font-weight: bold;
}

.success { color: #2ecc71; }