* {
    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;
    display: flex;
    align-items: center;
    justify-content: center;
}

.container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.auth-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

h1 {
    text-align: center;
    color: #333;
    margin-bottom: 2rem;
    font-size: 2rem;
    font-weight: 600;
}

.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    color: #555;
    font-weight: 500;
}

input {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #ddd !important; 
    border-radius: 8px;
    font-size: 16px;
    background-color: #fff;
    transition: border-color 0.3s ease;
}

input:focus {
    outline: none;
    border-color: #667eea !important;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.btn-primary {
    width: 100%;
    padding: 12px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 1rem;
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.3);
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    background: #6c757d;
    transform: none;
}

.error {
    color: #dc3545;
    margin-top: 1rem;
    padding: 15px;
    background: #f8d7da;
    border: 2px solid #f5c6cb;
    border-radius: 10px;
    font-size: 14px;
    display: none;
}

.auth-info {
    text-align: center;
    margin-top: 1rem;
    color: #6c757d;
    font-size: 12px;
}

@media (max-width: 480px) {
    .container {
        padding: 15px;
    }
    
    .auth-card {
        padding: 1.5rem;
    }
    
    h1 {
        font-size: 1.5rem;
    }
}