:root {
    --primary-color: #98D98E;
    --primary-hover: #7ac771;
    --text-color: #333;
    --bg-color: #f8f9fa;
}

body {
    background-color: var(--bg-color);
    font-family: 'Noto Sans JP', sans-serif;
}

.login-container {
    max-width: 400px;
    margin: 100px auto;
    padding: 20px;
    background: white;
    border-radius: 10px;
    box-shadow: 0 0 15px rgba(0,0,0,0.1);
}

.logo-container {
    text-align: center;
    margin-bottom: 30px;
}

.logo-text {
    font-size: 2em;
    color: var(--primary-color);
    margin: 10px 0;
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
}

.language-selector {
    position: absolute;
    top: 20px;
    right: 20px;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(152, 217, 142, 0.25);
}

.login-footer {
    text-align: center;
    margin-top: 20px;
}

.login-footer a {
    color: var(--primary-color);
    text-decoration: none;
}

.login-footer a:hover {
    color: var(--primary-hover);
    text-decoration: underline;
}