* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', 'Courier New', monospace;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1300px;
    margin: 0 auto;
    background: white;
    border-radius: 10px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
    overflow: hidden;
    animation: slideIn 0.5s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 25px;
    text-align: center;
}

.header h1 {
    font-size: 28px;
    margin-bottom: 5px;
}

.header p {
    opacity: 0.9;
}

.toolbar {
    background: #f8f9fa;
    padding: 15px 20px;
    border-bottom: 1px solid #e0e0e0;
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.btn-primary, .btn-success, .btn-info, .btn-danger {
    padding: 8px 16px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-family: monospace;
    font-weight: bold;
    transition: transform 0.2s;
}

.btn-primary { background: #667eea; color: white; }
.btn-success { background: #4CAF50; color: white; }
.btn-info { background: #2196F3; color: white; }
.btn-danger { background: #f44336; color: white; }

.btn-primary:hover, .btn-success:hover, .btn-info:hover, .btn-danger:hover {
    transform: translateY(-2px);
    filter: brightness(1.05);
}

.content {
    display: flex;
    min-height: 600px;
}

.sidebar {
    width: 260px;
    background: #f8f9fa;
    border-right: 1px solid #e0e0e0;
    padding: 15px;
}

.menu-item {
    padding: 12px;
    margin: 5px 0;
    background: white;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
    font-weight: 500;
}

.menu-item:hover {
    background: #667eea;
    color: white;
    transform: translateX(5px);
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.main {
    flex: 1;
    padding: 25px;
    background: white;
}

.form-section {
    background: #f8f9fa;
    padding: 25px;
    border-radius: 10px;
    margin-bottom: 20px;
    border: 1px solid #e0e0e0;
}

.form-group {
    margin-bottom: 15px;
}

label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
    color: #333;
}

input, select {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-family: monospace;
    font-size: 14px;
}

input:focus, select:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 5px rgba(102,126,234,0.3);
}

button {
    background: #667eea;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    margin-right: 10px;
    margin-top: 10px;
    font-weight: bold;
    transition: background 0.3s;
}

button:hover {
    background: #5a67d8;
}

.output {
    background: #1e1e1e;
    color: #0f0;
    padding: 20px;
    border-radius: 8px;
    font-family: 'Courier New', monospace;
    font-size: 13px;
    white-space: pre-wrap;
    max-height: 350px;
    overflow-y: auto;
    margin-top: 20px;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 15px;
}

th, td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #e0e0e0;
}

th {
    background: #667eea;
    color: white;
    font-weight: bold;
}

tr:hover {
    background: #f5f5f5;
}

.status {
    padding: 12px;
    margin: 10px 0;
    border-radius: 5px;
    display: none;
    animation: fadeIn 0.3s;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

.status.success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
    display: block;
}

.status.error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
    display: block;
}

@media (max-width: 768px) {
    .content {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid #e0e0e0;
    }
    
    .menu-item {
        display: inline-block;
        margin: 5px;
    }
}