:root {
    --primary-color: #2ecc71;
    --secondary-color: #3498db;
    --dark-color: #2c3e50;
    --light-color: #ecf0f1;
    --success-color: #27ae60;
    --error-color: #e74c3c;
}

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

.container {
    max-width: 600px;
    padding: 2rem;
}

.header {
    margin-bottom: 3rem;
}

.logo {
    max-width: 120px;
    margin-bottom: 1rem;
    display: block;
    margin-left: auto;
    margin-right: auto;
}

.header h1 {
    color: var(--dark-color);
    font-size: 1.8rem;
    font-weight: 600;
    margin: 0;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.card {
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    border: none;
    border-radius: 15px;
    background-color: #ffffff;
    overflow: hidden;
}

.card-body {
    padding: 2rem;
}

.form-label {
    font-weight: 500;
    color: var(--dark-color);
    margin-bottom: 0.5rem;
}

.form-control {
    border-radius: 10px;
    border: 2px solid #e0e0e0;
    padding: 0.75rem 1rem;
    transition: all 0.3s ease;
    font-size: 1rem;
}

.form-control:focus {
    box-shadow: 0 0 0 0.25rem rgba(46, 204, 113, 0.25);
    border-color: var(--primary-color);
}

.btn {
    border-radius: 10px;
    padding: 0.75rem 1.5rem;
    font-weight: 500;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 0.9rem;
}

.btn-primary {
    background-color: var(--primary-color);
    border: none;
}

.btn-primary:hover {
    background-color: #27ae60;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(46, 204, 113, 0.3);
}

.btn-secondary {
    background-color: var(--secondary-color);
    border: none;
}

.btn-secondary:hover {
    background-color: #2980b9;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(52, 152, 219, 0.3);
}

#status {
    min-height: 30px;
    padding: 1rem;
    border-radius: 10px;
    font-weight: 500;
    margin-top: 1.5rem;
}

#status.success {
    color: var(--success-color);
    background-color: rgba(39, 174, 96, 0.1);
}

#status.error {
    color: var(--error-color);
    background-color: rgba(231, 76, 60, 0.1);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    
    .card-body {
        padding: 1.5rem;
    }
    
    .logo {
        max-width: 100px;
    }
    
    .header h1 {
        font-size: 1.5rem;
    }
}