/* ログインページ専用のスタイル */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background: linear-gradient(135deg, #1a1a2e, #16213e);
}

.login-form {
    background: rgba(255, 255, 255, 0.15);
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
    text-align: center;
    max-width: 400px;
    width: 100%;
}

.login-form h2 {
    font-size: 24px;
    color: #fff;
    margin-bottom: 20px;
}

.error-message {
    color: #ff4d4d;
    font-weight: bold;
    background: rgba(255, 0, 0, 0.1);
    padding: 10px;
    border-radius: 5px;
    margin-bottom: 10px;
}

.input-group {
    display: flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 5px;
    padding: 10px;
    margin-bottom: 15px;
}

.input-group input {
    flex: 1;
    border: none;
    background: transparent;
    font-size: 18px;
    color: #fff;
    padding: 5px;
    outline: none;
}

.input-group i {
    color: #fff;
    margin-right: 10px;
}

.login-btn {
    background: #ff6600;
    color: #fff;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    font-size: 18px;
    cursor: pointer;
    width: 100%;
    transition: 0.3s;
}

.login-btn:hover {
    background: #e65c00;
}

/* スマホ対応 */
@media (max-width: 600px) {
    .login-form {
        padding: 20px;
    }
}