.tool-container {
    margin: 0 auto;
    background: #fff;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.config-panel {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 1.5rem;
    background: #f8fafc;
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid #e2e8f0;
}

.input-panel {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group.full-width {
    grid-column: span 2;
}

label {
    font-size: 0.9rem;
    font-weight: 500;
    color: #4b5563;
}

select, input[type="text"] {
    padding: 0.6rem;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    font-size: 0.95rem;
    background-color: #fff;
}

select:focus, input:focus, textarea:focus {
    outline: none;
    border-color: #2563eb;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.editor-grid {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.editor-col {
    flex: 1;
}

textarea {
    width: 100%;
    height: 150px;
    padding: 0.75rem;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    font-family: monospace;
    resize: vertical;
    margin-top: 0.5rem;
}

.action-col {
    display: flex;
    justify-content: center;
    gap: 1rem;
    padding: 0.5rem 0;
}

.btn-action {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    color: white;
}

.btn-action.encrypt {
    background-color: #2563eb;
}

.btn-action.encrypt:hover {
    background-color: #1d4ed8;
}

.btn-action.decrypt {
    background-color: #059669;
}

.btn-action.decrypt:hover {
    background-color: #047857;
}

.header-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.copy-btn {
    background: none;
    border: 1px solid #d1d5db;
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.85rem;
    cursor: pointer;
    color: #4b5563;
}

.copy-btn:hover {
    background: #f3f4f6;
    color: #111827;
}

@media (max-width: 640px) {
    .input-panel {
        grid-template-columns: 1fr;
    }
    
    .form-group.full-width {
        grid-column: span 1;
    }
    
    .action-col {
        flex-direction: column;
    }
    
    .btn-action {
        width: 100%;
        justify-content: center;
    }
}