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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.header {
    text-align: center;
    margin-bottom: 40px;
    color: white;
}

.header-content h1 {
    font-size: 3rem;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.header-content p {
    font-size: 1.2rem;
    opacity: 0.9;
}

.main-content {
    background: white;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    margin-bottom: 30px;
}

.scanner-form {
    margin-bottom: 30px;
}

.form-group {
    margin-bottom: 25px;
    position: relative;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #555;
    font-size: 1rem;
}

.form-group label i {
    margin-right: 8px;
    color: #667eea;
}

.form-group input {
    width: 100%;
    padding: 15px;
    border: 2px solid #e1e5e9;
    border-radius: 10px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: #f8f9fa;
}

.form-group input:focus {
    outline: none;
    border-color: #667eea;
    background: white;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.ping-btn {
    position: absolute;
    right: 5px;
    top: 35px;
    background: #28a745;
    color: white;
    border: none;
    padding: 10px 15px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9rem;
}

.ping-btn:hover {
    background: #218838;
    transform: translateY(-2px);
}

.preset-ports {
    margin-bottom: 30px;
}

.preset-ports label {
    display: block;
    margin-bottom: 15px;
    font-weight: 600;
    color: #555;
}

.preset-buttons {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.preset-btn {
    background: #f8f9fa;
    border: 2px solid #e1e5e9;
    padding: 10px 20px;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9rem;
    font-weight: 500;
}

.preset-btn:hover {
    background: #667eea;
    color: white;
    border-color: #667eea;
    transform: translateY(-2px);
}

.scan-btn {
    width: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 18px;
    border-radius: 12px;
    font-size: 1.2rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.scan-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.3);
}

.scan-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.progress-section {
    margin: 30px 0;
    text-align: center;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: #e1e5e9;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 15px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #667eea, #764ba2);
    width: 0%;
    transition: width 0.3s ease;
    border-radius: 4px;
}

.progress-text {
    font-size: 1rem;
    color: #666;
    font-weight: 500;
}

.results-section {
    margin-top: 40px;
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    flex-wrap: wrap;
    gap: 15px;
}

.results-header h2 {
    color: #333;
    font-size: 1.8rem;
}

.results-summary {
    background: #f8f9fa;
    padding: 15px 20px;
    border-radius: 10px;
    font-weight: 500;
    color: #555;
}

.results-actions {
    display: flex;
    gap: 15px;
    margin-bottom: 25px;
    flex-wrap: wrap;
}

.export-btn, .clear-btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
}

.export-btn {
    background: #28a745;
    color: white;
}

.export-btn:hover {
    background: #218838;
    transform: translateY(-2px);
}

.clear-btn {
    background: #dc3545;
    color: white;
}

.clear-btn:hover {
    background: #c82333;
    transform: translateY(-2px);
}

.results-table-container {
    overflow-x: auto;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.results-table {
    width: 100%;
    border-collapse: collapse;
    background: white;
}

.results-table th {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 15px;
    text-align: left;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.results-table td {
    padding: 15px;
    border-bottom: 1px solid #e1e5e9;
    transition: background 0.3s ease;
}

.results-table tbody tr:hover {
    background: #f8f9fa;
}

.status-open {
    color: #28a745;
    font-weight: 600;
}

.status-closed {
    color: #dc3545;
    font-weight: 600;
}

.info-section {
    margin-top: 40px;
}

.info-card {
    background: #f8f9fa;
    padding: 30px;
    border-radius: 15px;
    border-left: 5px solid #667eea;
}

.info-card h3 {
    color: #333;
    margin-bottom: 15px;
    font-size: 1.4rem;
}

.info-card p {
    color: #666;
    line-height: 1.6;
    margin-bottom: 20px;
}

.common-ports h4 {
    color: #555;
    margin-bottom: 15px;
    font-size: 1.1rem;
}

.port-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.port-item {
    background: white;
    padding: 8px 15px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    color: #667eea;
    border: 2px solid #e1e5e9;
    transition: all 0.3s ease;
}

.port-item:hover {
    background: #667eea;
    color: white;
    transform: translateY(-2px);
}

.footer {
    text-align: center;
    color: white;
    opacity: 0.8;
    font-size: 0.9rem;
    margin-top: 30px;
}

.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 15px 25px;
    border-radius: 8px;
    color: white;
    font-weight: 500;
    z-index: 1000;
    transform: translateX(400px);
    transition: transform 0.3s ease;
    max-width: 300px;
}

.notification.show {
    transform: translateX(0);
}

.notification.success {
    background: #28a745;
}

.notification.error {
    background: #dc3545;
}

.notification.info {
    background: #17a2b8;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    .header-content h1 {
        font-size: 2rem;
    }
    
    .main-content {
        padding: 25px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .preset-buttons {
        justify-content: center;
    }
    
    .results-header {
        flex-direction: column;
        align-items: stretch;
    }
    
    .results-actions {
        justify-content: center;
    }
    
    .ping-btn {
        position: static;
        margin-top: 10px;
        width: 100%;
    }
}

@media (max-width: 480px) {
    .header-content h1 {
        font-size: 1.8rem;
    }
    
    .main-content {
        padding: 20px;
    }
    
    .results-table th,
    .results-table td {
        padding: 10px 8px;
        font-size: 0.9rem;
    }
}