/* ログインページ専用スタイル */
body.login-page {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 40px;
    padding-bottom: 40px;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.form-signin {
    width: 100%;
    max-width: 400px;
    padding: 2rem;
    margin: auto;
    background: white;
    border-radius: 15px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.form-signin .logo {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: white;
    font-size: 2rem;
}

.form-signin h1 {
    color: #333;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.form-signin .form-control {
    position: relative;
    box-sizing: border-box;
    height: auto;
    padding: 12px 15px;
    font-size: 16px;
    border-radius: 8px;
    border: 1px solid #dee2e6;
    margin-bottom: 1rem;
    transition: all 0.2s ease-in-out;
}

.form-signin .form-control:focus {
    z-index: 2;
    border-color: #667eea;
    box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
}

.form-signin input[type="email"] {
    border-bottom-right-radius: 8px;
    border-bottom-left-radius: 8px;
}

.form-signin input[type="password"] {
    border-top-left-radius: 8px;
    border-top-right-radius: 8px;
}

.form-signin .btn-primary {
    width: 100%;
    padding: 12px;
    font-size: 16px;
    font-weight: 600;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    border-radius: 8px;
    margin-bottom: 1rem;
    transition: all 0.2s ease-in-out;
}

.form-signin .btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.form-signin .form-check {
    margin-bottom: 1rem;
}

.form-signin .form-check-label {
    color: #666;
    font-size: 14px;
}

/* アラートスタイル */
.alert {
    border-radius: 8px;
    border: none;
    margin-bottom: 1rem;
}

.alert-danger {
    background-color: #f8d7da;
    color: #721c24;
}

.alert-success {
    background-color: #d1edff;
    color: #0c5460;
}

/* レスポンシブ */
@media (max-width: 576px) {
    .form-signin {
        max-width: 90%;
        padding: 1.5rem;
    }
}