* {
    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;
    padding: 20px;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    border-radius: 12px;
    box-shadow: 0 15px 35px rgba(0,0,0,0.1);
    overflow: hidden;
}

.login-container {
    max-width: 450px;
    margin: 50px auto;
    background: white;
    border-radius: 12px;
    box-shadow: 0 15px 35px rgba(0,0,0,0.1);
    padding: 40px;
}

.header {
    background: linear-gradient(135deg, #2c3e50, #34495e);
    color: white;
    padding: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header h1 {
    font-size: 2rem;
    margin-bottom: 5px;
}

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

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-header h1 {
    color: #2c3e50;
    margin-bottom: 10px;
    font-size: 2.2rem;
}

.login-header p {
    color: #7f8c8d;
    font-size: 1.1rem;
}

.content {
    padding: 30px;
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 30px;
}

.form-container {
    background: #f8f9fa;
    padding: 30px;
    border-radius: 10px;
    border: 1px solid #e9ecef;
}

.dashboard {
    padding: 30px;
}

.dashboard-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.card {
    background: #f8f9fa;
    padding: 25px;
    border-radius: 10px;
    border: 1px solid #e9ecef;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
}

.card h3 {
    color: #2c3e50;
    margin-bottom: 15px;
    font-size: 1.3rem;
}

.card p {
    color: #7f8c8d;
    margin-bottom: 20px;
    font-size: 1.8rem;
    font-weight: bold;
}

.form-group {
    margin-bottom: 20px;
}

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

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #2c3e50;
    font-size: 0.95rem;
}

input, select, textarea {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s, box-shadow 0.3s;
    background: white;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.btn {
    background: #3498db;
    color: white;
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
    text-align: center;
    transition: all 0.3s;
    border: 2px solid transparent;
}

.btn:hover {
    background: #2980b9;
    transform: translateY(-2px);
}

.btn-secondary {
    background: #95a5a6;
    color: white;
}

.btn-secondary:hover {
    background: #7f8c8d;
}

.btn-danger {
    background: #e74c3c;
}

.btn-danger:hover {
    background: #c0392b;
}

.btn-small {
    padding: 8px 16px;
    font-size: 14px;
}

.form-actions {
    display: flex;
    gap: 15px;
    margin-top: 30px;
}

.form-actions .btn {
    flex: 1;
}

.customer-card {
    background: #f8f9fa;
    border: 1px solid #e9ecef;
    border-radius: 10px;
    padding: 25px;
    margin-bottom: 20px;
    transition: box-shadow 0.3s;
}

.customer-card:hover {
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.customer-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid #e9ecef;
}

.customer-name {
    font-size: 1.4rem;
    font-weight: bold;
    color: #2c3e50;
}

.customer-actions {
    display: flex;
    gap: 10px;
}

.customer-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-bottom: 20px;
}

.info-item {
    background: white;
    padding: 12px 15px;
    border-radius: 8px;
    border-left: 4px solid #3498db;
    font-size: 0.95rem;
}

.activities {
    margin-top: 20px;
}

.activities h4 {
    color: #2c3e50;
    margin-bottom: 15px;
    font-size: 1.1rem;
}

.activity-item {
    background: white;
    padding: 12px 15px;
    margin: 8px 0;
    border-radius: 8px;
    border-left: 4px solid #27ae60;
    font-size: 0.9rem;
}

.no-activities {
    color: #7f8c8d;
    font-style: italic;
    text-align: center;
    padding: 20px;
}

.more-activities {
    color: #7f8c8d;
    font-size: 0.9rem;
    text-align: center;
    margin-top: 10px;
}

.customers-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 2px solid #e9ecef;
}

.header-actions {
    display: flex;
    gap: 15px;
    align-items: center;
}

.header-actions input {
    width: 250px;
}

.quick-links {
    background: #f8f9fa;
    padding: 25px;
    border-radius: 10px;
    border: 1px solid #e9ecef;
}

.quick-links h3 {
    color: #2c3e50;
    margin-bottom: 20px;
}

.quick-links .btn {
    display: block;
    margin-bottom: 10px;
    width: 100%;
}

.quick-stats {
    padding: 0 30px 30px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 15px;
}

.stat-item {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 10px;
    border: 1px solid #e9ecef;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.stat-label {
    color: #7f8c8d;
    font-weight: 600;
}

.stat-value {
    color: #2c3e50;
    font-size: 1.5rem;
    font-weight: bold;
}

.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: #7f8c8d;
}

.empty-state h3 {
    margin-bottom: 15px;
    color: #2c3e50;
}

.error-message {
    background: #e74c3c;
    color: white;
    padding: 12px 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    text-align: center;
    font-weight: 600;
}

.success-message {
    background: #27ae60;
    color: white;
    padding: 12px 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    text-align: center;
    font-weight: 600;
}

.demo-credentials {
    background: linear-gradient(135deg, #f39c12, #e67e22);
    color: white;
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 25px;
    text-align: center;
}

.demo-credentials h3 {
    margin-bottom: 10px;
}

.login-footer {
    margin-top: 25px;
    text-align: center;
    color: #7f8c8d;
    font-size: 0.9rem;
}

.hidden {
    display: none !important;
}

@media (max-width: 768px) {
    .content {
        grid-template-columns: 1fr;
        padding: 20px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .header {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
    
    .nav-buttons {
        justify-content: center;
    }
    
    .customers-header {
        flex-direction: column;
        gap: 15px;
    }
    
    .header-actions {
        flex-direction: column;
        width: 100%;
    }
    
    .header-actions input {
        width: 100%;
    }
    
    .customer-header {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
    
    .dashboard-cards {
        grid-template-columns: 1fr;
    }
}