.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.login-box {
    width: 100%;
    max-width: 400px;
    padding: 40px 30px;
}

.login-title {
    text-align: center;
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 30px;
    color: #495057;
}

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

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: #495057;
    margin-bottom: 8px;
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    font-size: 16px;
    font-family: inherit;
    border: 2px solid #e1e5e9;
    border-radius: 6px;
    outline: none;
    transition: all 0.3s ease;
    background: #f8f9fa;
    box-sizing: border-box;
}

.form-input:focus {
    border-color: #6c757d;
    background: white;
    box-shadow: 0 0 0 4px rgba(108,117,125,0.1);
}

.form-input::placeholder {
    color: #999;
    font-style: italic;
}

.form-submit {
    width: 100%;
    padding: 12px 20px;
    font-size: 16px;
    font-family: inherit;
    background: #6c757d;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
}

.form-submit:hover {
    background: #5a6268;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(108,117,125,0.3);
}

.form-submit:disabled {
    background: #6c757d;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.error-message {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
    border-radius: 6px;
    padding: 12px;
    margin-bottom: 20px;
    font-size: 14px;
    display: none;
}

.loading-spinner {
    display: none;
    width: 20px;
    height: 20px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid #6c757d;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@media (max-width: 480px) {
    .login-box {
        padding: 30px 20px;
        margin: 10px;
    }
    
    .login-title {
        font-size: 20px;
    }
}